Java 使用两个SurfaceView的并排摄像头
我已经为一个android应用程序编写了代码,它应该同时在两个曲面视图上并排显示相机预览 这是我想要的输出: 我面临的问题:Java 使用两个SurfaceView的并排摄像头,java,android,camera,surfaceview,Java,Android,Camera,Surfaceview,我已经为一个android应用程序编写了代码,它应该同时在两个曲面视图上并排显示相机预览 这是我想要的输出: 我面临的问题: Camera camera; SurfaceView surfaceView; SurfaceHolder surfaceHolder; PictureCallback rawCallback; ShutterCallback shutterCallback; PictureCallback jpegCallback; /** Called when the act
Camera camera;
SurfaceView surfaceView;
SurfaceHolder surfaceHolder;
PictureCallback rawCallback;
ShutterCallback shutterCallback;
PictureCallback jpegCallback;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
surfaceView = (SurfaceView) findViewById(R.id.surfaceView);
surfaceHolder = surfaceView.getHolder();
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
surfaceHolder.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(String.format("/sdcard/%d.jpg", System.currentTimeMillis()));
outStream.write(data);
outStream.close();
Log.d("Log", "onPictureTaken - wrote bytes: " + data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
Toast.makeText(getApplicationContext(), "Picture Saved", 2000).show();
refreshCamera();
}
};
}
public void captureImage(View v) throws IOException {
//take the picture
camera.takePicture(null, null, jpegCallback);
}
public void refreshCamera() {
if (surfaceHolder.getSurface() == null) {
// preview surface does not exist
return;
}
// stop preview before making changes
try {
camera.stopPreview();
} catch (Exception e) {
// ignore: tried to stop a non-existent preview
}
// set preview size and make any resize, rotate or
// reformatting changes here
// start preview with new settings
try {
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
} catch (Exception e) {
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// Now that the size is known, set up the camera parameters and begin
// the preview.
refreshCamera();
}
public void surfaceCreated(SurfaceHolder holder) {
try {
// open the camera
camera = Camera.open();
} catch (RuntimeException e) {
// check for exceptions
System.err.println(e);
return;
}
Camera.Parameters param;
param = camera.getParameters();
// modify parameter
param.setPreviewSize(352, 288);
camera.setParameters(param);
try {
// The Surface has been created, now tell the camera where to draw
// the preview.
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
} catch (Exception e) {
// check for exceptions
System.err.println(e);
return;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// stop preview and release camera
camera.stopPreview();
camera.release();
camera = null;
}
Camera camera;
SurfaceView surfaceView2;
SurfaceHolder surfaceHolder2;
PictureCallback rawCallback;
ShutterCallback shutterCallback;
PictureCallback jpegCallback;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
surfaceView2 = (SurfaceView) findViewById(R.id.surfaceView2);
surfaceHolder2 = surfaceView2.getHolder();
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
surfaceHolder2.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(String.format("/sdcard/%d.jpg", System.currentTimeMillis()));
outStream.write(data);
outStream.close();
Log.d("Log", "onPictureTaken - wrote bytes: " + data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
Toast.makeText(getApplicationContext(), "Picture Saved", 2000).show();
refreshCamera();
}
};
}
public void captureImage(View v) throws IOException {
//take the picture
camera.takePicture(null, null, jpegCallback);
}
public void refreshCamera() {
if (surfaceHolder2.getSurface() == null) {
// preview surface does not exist
return;
}
// stop preview before making changes
try {
camera.stopPreview();
} catch (Exception e) {
// ignore: tried to stop a non-existent preview
}
// set preview size and make any resize, rotate or
// reformatting changes here
// start preview with new settings
try {
camera.setPreviewDisplay(surfaceHolder2);
camera.startPreview();
} catch (Exception e) {
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// Now that the size is known, set up the camera parameters and begin
// the preview.
refreshCamera();
}
public void surfaceCreated(SurfaceHolder holder) {
try {
// open the camera
camera = Camera.open();
} catch (RuntimeException e) {
// check for exceptions
System.err.println(e);
return;
}
Camera.Parameters param;
param = camera.getParameters();
// modify parameter
param.setPreviewSize(352, 288);
camera.setParameters(param);
try {
// The Surface has been created, now tell the camera where to draw
// the preview.
camera.setPreviewDisplay(surfaceHolder2);
camera.startPreview();
} catch (Exception e) {
// check for exceptions
System.err.println(e);
return;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// stop preview and release camera
camera.stopPreview();
camera.release();
camera = null;
}
<SurfaceView
android:id="@+id/surfaceView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
<SurfaceView
android:id="@+id/surfaceView2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
</LinearLayout>
1) 安装apk后,将安装两个应用程序
2) 第一个应用程序在右表面视图上显示相机预览
3) 第二个应用程序在左侧曲面视图上显示相机预览
截图:
1)单个APK安装两个应用程序:
Camera camera;
SurfaceView surfaceView;
SurfaceHolder surfaceHolder;
PictureCallback rawCallback;
ShutterCallback shutterCallback;
PictureCallback jpegCallback;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
surfaceView = (SurfaceView) findViewById(R.id.surfaceView);
surfaceHolder = surfaceView.getHolder();
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
surfaceHolder.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(String.format("/sdcard/%d.jpg", System.currentTimeMillis()));
outStream.write(data);
outStream.close();
Log.d("Log", "onPictureTaken - wrote bytes: " + data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
Toast.makeText(getApplicationContext(), "Picture Saved", 2000).show();
refreshCamera();
}
};
}
public void captureImage(View v) throws IOException {
//take the picture
camera.takePicture(null, null, jpegCallback);
}
public void refreshCamera() {
if (surfaceHolder.getSurface() == null) {
// preview surface does not exist
return;
}
// stop preview before making changes
try {
camera.stopPreview();
} catch (Exception e) {
// ignore: tried to stop a non-existent preview
}
// set preview size and make any resize, rotate or
// reformatting changes here
// start preview with new settings
try {
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
} catch (Exception e) {
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// Now that the size is known, set up the camera parameters and begin
// the preview.
refreshCamera();
}
public void surfaceCreated(SurfaceHolder holder) {
try {
// open the camera
camera = Camera.open();
} catch (RuntimeException e) {
// check for exceptions
System.err.println(e);
return;
}
Camera.Parameters param;
param = camera.getParameters();
// modify parameter
param.setPreviewSize(352, 288);
camera.setParameters(param);
try {
// The Surface has been created, now tell the camera where to draw
// the preview.
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
} catch (Exception e) {
// check for exceptions
System.err.println(e);
return;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// stop preview and release camera
camera.stopPreview();
camera.release();
camera = null;
}
Camera camera;
SurfaceView surfaceView2;
SurfaceHolder surfaceHolder2;
PictureCallback rawCallback;
ShutterCallback shutterCallback;
PictureCallback jpegCallback;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
surfaceView2 = (SurfaceView) findViewById(R.id.surfaceView2);
surfaceHolder2 = surfaceView2.getHolder();
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
surfaceHolder2.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(String.format("/sdcard/%d.jpg", System.currentTimeMillis()));
outStream.write(data);
outStream.close();
Log.d("Log", "onPictureTaken - wrote bytes: " + data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
Toast.makeText(getApplicationContext(), "Picture Saved", 2000).show();
refreshCamera();
}
};
}
public void captureImage(View v) throws IOException {
//take the picture
camera.takePicture(null, null, jpegCallback);
}
public void refreshCamera() {
if (surfaceHolder2.getSurface() == null) {
// preview surface does not exist
return;
}
// stop preview before making changes
try {
camera.stopPreview();
} catch (Exception e) {
// ignore: tried to stop a non-existent preview
}
// set preview size and make any resize, rotate or
// reformatting changes here
// start preview with new settings
try {
camera.setPreviewDisplay(surfaceHolder2);
camera.startPreview();
} catch (Exception e) {
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// Now that the size is known, set up the camera parameters and begin
// the preview.
refreshCamera();
}
public void surfaceCreated(SurfaceHolder holder) {
try {
// open the camera
camera = Camera.open();
} catch (RuntimeException e) {
// check for exceptions
System.err.println(e);
return;
}
Camera.Parameters param;
param = camera.getParameters();
// modify parameter
param.setPreviewSize(352, 288);
camera.setParameters(param);
try {
// The Surface has been created, now tell the camera where to draw
// the preview.
camera.setPreviewDisplay(surfaceHolder2);
camera.startPreview();
} catch (Exception e) {
// check for exceptions
System.err.println(e);
return;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// stop preview and release camera
camera.stopPreview();
camera.release();
camera = null;
}
<SurfaceView
android:id="@+id/surfaceView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
<SurfaceView
android:id="@+id/surfaceView2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
</LinearLayout>
链接到显示错误的屏幕截图:
2)当我打开第一个应用程序时,会在左侧表面显示摄像头预览查看:
Camera camera;
SurfaceView surfaceView;
SurfaceHolder surfaceHolder;
PictureCallback rawCallback;
ShutterCallback shutterCallback;
PictureCallback jpegCallback;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
surfaceView = (SurfaceView) findViewById(R.id.surfaceView);
surfaceHolder = surfaceView.getHolder();
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
surfaceHolder.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(String.format("/sdcard/%d.jpg", System.currentTimeMillis()));
outStream.write(data);
outStream.close();
Log.d("Log", "onPictureTaken - wrote bytes: " + data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
Toast.makeText(getApplicationContext(), "Picture Saved", 2000).show();
refreshCamera();
}
};
}
public void captureImage(View v) throws IOException {
//take the picture
camera.takePicture(null, null, jpegCallback);
}
public void refreshCamera() {
if (surfaceHolder.getSurface() == null) {
// preview surface does not exist
return;
}
// stop preview before making changes
try {
camera.stopPreview();
} catch (Exception e) {
// ignore: tried to stop a non-existent preview
}
// set preview size and make any resize, rotate or
// reformatting changes here
// start preview with new settings
try {
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
} catch (Exception e) {
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// Now that the size is known, set up the camera parameters and begin
// the preview.
refreshCamera();
}
public void surfaceCreated(SurfaceHolder holder) {
try {
// open the camera
camera = Camera.open();
} catch (RuntimeException e) {
// check for exceptions
System.err.println(e);
return;
}
Camera.Parameters param;
param = camera.getParameters();
// modify parameter
param.setPreviewSize(352, 288);
camera.setParameters(param);
try {
// The Surface has been created, now tell the camera where to draw
// the preview.
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
} catch (Exception e) {
// check for exceptions
System.err.println(e);
return;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// stop preview and release camera
camera.stopPreview();
camera.release();
camera = null;
}
Camera camera;
SurfaceView surfaceView2;
SurfaceHolder surfaceHolder2;
PictureCallback rawCallback;
ShutterCallback shutterCallback;
PictureCallback jpegCallback;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
surfaceView2 = (SurfaceView) findViewById(R.id.surfaceView2);
surfaceHolder2 = surfaceView2.getHolder();
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
surfaceHolder2.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(String.format("/sdcard/%d.jpg", System.currentTimeMillis()));
outStream.write(data);
outStream.close();
Log.d("Log", "onPictureTaken - wrote bytes: " + data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
Toast.makeText(getApplicationContext(), "Picture Saved", 2000).show();
refreshCamera();
}
};
}
public void captureImage(View v) throws IOException {
//take the picture
camera.takePicture(null, null, jpegCallback);
}
public void refreshCamera() {
if (surfaceHolder2.getSurface() == null) {
// preview surface does not exist
return;
}
// stop preview before making changes
try {
camera.stopPreview();
} catch (Exception e) {
// ignore: tried to stop a non-existent preview
}
// set preview size and make any resize, rotate or
// reformatting changes here
// start preview with new settings
try {
camera.setPreviewDisplay(surfaceHolder2);
camera.startPreview();
} catch (Exception e) {
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// Now that the size is known, set up the camera parameters and begin
// the preview.
refreshCamera();
}
public void surfaceCreated(SurfaceHolder holder) {
try {
// open the camera
camera = Camera.open();
} catch (RuntimeException e) {
// check for exceptions
System.err.println(e);
return;
}
Camera.Parameters param;
param = camera.getParameters();
// modify parameter
param.setPreviewSize(352, 288);
camera.setParameters(param);
try {
// The Surface has been created, now tell the camera where to draw
// the preview.
camera.setPreviewDisplay(surfaceHolder2);
camera.startPreview();
} catch (Exception e) {
// check for exceptions
System.err.println(e);
return;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// stop preview and release camera
camera.stopPreview();
camera.release();
camera = null;
}
<SurfaceView
android:id="@+id/surfaceView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
<SurfaceView
android:id="@+id/surfaceView2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
</LinearLayout>
链接到显示错误的屏幕截图:i.stack.imgur.com/LqA5j.png
3)当我打开第二个应用程序时,会在右表面显示摄像头预览查看:
Camera camera;
SurfaceView surfaceView;
SurfaceHolder surfaceHolder;
PictureCallback rawCallback;
ShutterCallback shutterCallback;
PictureCallback jpegCallback;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
surfaceView = (SurfaceView) findViewById(R.id.surfaceView);
surfaceHolder = surfaceView.getHolder();
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
surfaceHolder.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(String.format("/sdcard/%d.jpg", System.currentTimeMillis()));
outStream.write(data);
outStream.close();
Log.d("Log", "onPictureTaken - wrote bytes: " + data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
Toast.makeText(getApplicationContext(), "Picture Saved", 2000).show();
refreshCamera();
}
};
}
public void captureImage(View v) throws IOException {
//take the picture
camera.takePicture(null, null, jpegCallback);
}
public void refreshCamera() {
if (surfaceHolder.getSurface() == null) {
// preview surface does not exist
return;
}
// stop preview before making changes
try {
camera.stopPreview();
} catch (Exception e) {
// ignore: tried to stop a non-existent preview
}
// set preview size and make any resize, rotate or
// reformatting changes here
// start preview with new settings
try {
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
} catch (Exception e) {
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// Now that the size is known, set up the camera parameters and begin
// the preview.
refreshCamera();
}
public void surfaceCreated(SurfaceHolder holder) {
try {
// open the camera
camera = Camera.open();
} catch (RuntimeException e) {
// check for exceptions
System.err.println(e);
return;
}
Camera.Parameters param;
param = camera.getParameters();
// modify parameter
param.setPreviewSize(352, 288);
camera.setParameters(param);
try {
// The Surface has been created, now tell the camera where to draw
// the preview.
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
} catch (Exception e) {
// check for exceptions
System.err.println(e);
return;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// stop preview and release camera
camera.stopPreview();
camera.release();
camera = null;
}
Camera camera;
SurfaceView surfaceView2;
SurfaceHolder surfaceHolder2;
PictureCallback rawCallback;
ShutterCallback shutterCallback;
PictureCallback jpegCallback;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
surfaceView2 = (SurfaceView) findViewById(R.id.surfaceView2);
surfaceHolder2 = surfaceView2.getHolder();
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
surfaceHolder2.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(String.format("/sdcard/%d.jpg", System.currentTimeMillis()));
outStream.write(data);
outStream.close();
Log.d("Log", "onPictureTaken - wrote bytes: " + data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
Toast.makeText(getApplicationContext(), "Picture Saved", 2000).show();
refreshCamera();
}
};
}
public void captureImage(View v) throws IOException {
//take the picture
camera.takePicture(null, null, jpegCallback);
}
public void refreshCamera() {
if (surfaceHolder2.getSurface() == null) {
// preview surface does not exist
return;
}
// stop preview before making changes
try {
camera.stopPreview();
} catch (Exception e) {
// ignore: tried to stop a non-existent preview
}
// set preview size and make any resize, rotate or
// reformatting changes here
// start preview with new settings
try {
camera.setPreviewDisplay(surfaceHolder2);
camera.startPreview();
} catch (Exception e) {
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// Now that the size is known, set up the camera parameters and begin
// the preview.
refreshCamera();
}
public void surfaceCreated(SurfaceHolder holder) {
try {
// open the camera
camera = Camera.open();
} catch (RuntimeException e) {
// check for exceptions
System.err.println(e);
return;
}
Camera.Parameters param;
param = camera.getParameters();
// modify parameter
param.setPreviewSize(352, 288);
camera.setParameters(param);
try {
// The Surface has been created, now tell the camera where to draw
// the preview.
camera.setPreviewDisplay(surfaceHolder2);
camera.startPreview();
} catch (Exception e) {
// check for exceptions
System.err.println(e);
return;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// stop preview and release camera
camera.stopPreview();
camera.release();
camera = null;
}
<SurfaceView
android:id="@+id/surfaceView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
<SurfaceView
android:id="@+id/surfaceView2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
</LinearLayout>
链接到显示错误的屏幕截图:i.stack.imgur.com/DU6c7.png
代码:
Camera camera;
SurfaceView surfaceView;
SurfaceHolder surfaceHolder;
PictureCallback rawCallback;
ShutterCallback shutterCallback;
PictureCallback jpegCallback;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
surfaceView = (SurfaceView) findViewById(R.id.surfaceView);
surfaceHolder = surfaceView.getHolder();
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
surfaceHolder.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(String.format("/sdcard/%d.jpg", System.currentTimeMillis()));
outStream.write(data);
outStream.close();
Log.d("Log", "onPictureTaken - wrote bytes: " + data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
Toast.makeText(getApplicationContext(), "Picture Saved", 2000).show();
refreshCamera();
}
};
}
public void captureImage(View v) throws IOException {
//take the picture
camera.takePicture(null, null, jpegCallback);
}
public void refreshCamera() {
if (surfaceHolder.getSurface() == null) {
// preview surface does not exist
return;
}
// stop preview before making changes
try {
camera.stopPreview();
} catch (Exception e) {
// ignore: tried to stop a non-existent preview
}
// set preview size and make any resize, rotate or
// reformatting changes here
// start preview with new settings
try {
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
} catch (Exception e) {
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// Now that the size is known, set up the camera parameters and begin
// the preview.
refreshCamera();
}
public void surfaceCreated(SurfaceHolder holder) {
try {
// open the camera
camera = Camera.open();
} catch (RuntimeException e) {
// check for exceptions
System.err.println(e);
return;
}
Camera.Parameters param;
param = camera.getParameters();
// modify parameter
param.setPreviewSize(352, 288);
camera.setParameters(param);
try {
// The Surface has been created, now tell the camera where to draw
// the preview.
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
} catch (Exception e) {
// check for exceptions
System.err.println(e);
return;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// stop preview and release camera
camera.stopPreview();
camera.release();
camera = null;
}
Camera camera;
SurfaceView surfaceView2;
SurfaceHolder surfaceHolder2;
PictureCallback rawCallback;
ShutterCallback shutterCallback;
PictureCallback jpegCallback;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
surfaceView2 = (SurfaceView) findViewById(R.id.surfaceView2);
surfaceHolder2 = surfaceView2.getHolder();
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
surfaceHolder2.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(String.format("/sdcard/%d.jpg", System.currentTimeMillis()));
outStream.write(data);
outStream.close();
Log.d("Log", "onPictureTaken - wrote bytes: " + data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
Toast.makeText(getApplicationContext(), "Picture Saved", 2000).show();
refreshCamera();
}
};
}
public void captureImage(View v) throws IOException {
//take the picture
camera.takePicture(null, null, jpegCallback);
}
public void refreshCamera() {
if (surfaceHolder2.getSurface() == null) {
// preview surface does not exist
return;
}
// stop preview before making changes
try {
camera.stopPreview();
} catch (Exception e) {
// ignore: tried to stop a non-existent preview
}
// set preview size and make any resize, rotate or
// reformatting changes here
// start preview with new settings
try {
camera.setPreviewDisplay(surfaceHolder2);
camera.startPreview();
} catch (Exception e) {
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// Now that the size is known, set up the camera parameters and begin
// the preview.
refreshCamera();
}
public void surfaceCreated(SurfaceHolder holder) {
try {
// open the camera
camera = Camera.open();
} catch (RuntimeException e) {
// check for exceptions
System.err.println(e);
return;
}
Camera.Parameters param;
param = camera.getParameters();
// modify parameter
param.setPreviewSize(352, 288);
camera.setParameters(param);
try {
// The Surface has been created, now tell the camera where to draw
// the preview.
camera.setPreviewDisplay(surfaceHolder2);
camera.startPreview();
} catch (Exception e) {
// check for exceptions
System.err.println(e);
return;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// stop preview and release camera
camera.stopPreview();
camera.release();
camera = null;
}
<SurfaceView
android:id="@+id/surfaceView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
<SurfaceView
android:id="@+id/surfaceView2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
</LinearLayout>
Android Manifest.xml
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name="com.javacodegeeks.androidsurfaceviewexample.AndroidSurfaceviewExample"
android:label="@string/app_name"
android:screenOrientation="landscape"
android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.javacodegeeks.androidsurfaceviewexample.AndroidSurfaceviewExample2"
android:label="@string/app_name"
android:screenOrientation="landscape"
android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen">
</activity>
</application>
二等舱:
Camera camera;
SurfaceView surfaceView;
SurfaceHolder surfaceHolder;
PictureCallback rawCallback;
ShutterCallback shutterCallback;
PictureCallback jpegCallback;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
surfaceView = (SurfaceView) findViewById(R.id.surfaceView);
surfaceHolder = surfaceView.getHolder();
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
surfaceHolder.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(String.format("/sdcard/%d.jpg", System.currentTimeMillis()));
outStream.write(data);
outStream.close();
Log.d("Log", "onPictureTaken - wrote bytes: " + data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
Toast.makeText(getApplicationContext(), "Picture Saved", 2000).show();
refreshCamera();
}
};
}
public void captureImage(View v) throws IOException {
//take the picture
camera.takePicture(null, null, jpegCallback);
}
public void refreshCamera() {
if (surfaceHolder.getSurface() == null) {
// preview surface does not exist
return;
}
// stop preview before making changes
try {
camera.stopPreview();
} catch (Exception e) {
// ignore: tried to stop a non-existent preview
}
// set preview size and make any resize, rotate or
// reformatting changes here
// start preview with new settings
try {
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
} catch (Exception e) {
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// Now that the size is known, set up the camera parameters and begin
// the preview.
refreshCamera();
}
public void surfaceCreated(SurfaceHolder holder) {
try {
// open the camera
camera = Camera.open();
} catch (RuntimeException e) {
// check for exceptions
System.err.println(e);
return;
}
Camera.Parameters param;
param = camera.getParameters();
// modify parameter
param.setPreviewSize(352, 288);
camera.setParameters(param);
try {
// The Surface has been created, now tell the camera where to draw
// the preview.
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
} catch (Exception e) {
// check for exceptions
System.err.println(e);
return;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// stop preview and release camera
camera.stopPreview();
camera.release();
camera = null;
}
Camera camera;
SurfaceView surfaceView2;
SurfaceHolder surfaceHolder2;
PictureCallback rawCallback;
ShutterCallback shutterCallback;
PictureCallback jpegCallback;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
surfaceView2 = (SurfaceView) findViewById(R.id.surfaceView2);
surfaceHolder2 = surfaceView2.getHolder();
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
surfaceHolder2.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(String.format("/sdcard/%d.jpg", System.currentTimeMillis()));
outStream.write(data);
outStream.close();
Log.d("Log", "onPictureTaken - wrote bytes: " + data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
Toast.makeText(getApplicationContext(), "Picture Saved", 2000).show();
refreshCamera();
}
};
}
public void captureImage(View v) throws IOException {
//take the picture
camera.takePicture(null, null, jpegCallback);
}
public void refreshCamera() {
if (surfaceHolder2.getSurface() == null) {
// preview surface does not exist
return;
}
// stop preview before making changes
try {
camera.stopPreview();
} catch (Exception e) {
// ignore: tried to stop a non-existent preview
}
// set preview size and make any resize, rotate or
// reformatting changes here
// start preview with new settings
try {
camera.setPreviewDisplay(surfaceHolder2);
camera.startPreview();
} catch (Exception e) {
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// Now that the size is known, set up the camera parameters and begin
// the preview.
refreshCamera();
}
public void surfaceCreated(SurfaceHolder holder) {
try {
// open the camera
camera = Camera.open();
} catch (RuntimeException e) {
// check for exceptions
System.err.println(e);
return;
}
Camera.Parameters param;
param = camera.getParameters();
// modify parameter
param.setPreviewSize(352, 288);
camera.setParameters(param);
try {
// The Surface has been created, now tell the camera where to draw
// the preview.
camera.setPreviewDisplay(surfaceHolder2);
camera.startPreview();
} catch (Exception e) {
// check for exceptions
System.err.println(e);
return;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// stop preview and release camera
camera.stopPreview();
camera.release();
camera = null;
}
<SurfaceView
android:id="@+id/surfaceView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
<SurfaceView
android:id="@+id/surfaceView2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
</LinearLayout>
activity\u main.xml:
Camera camera;
SurfaceView surfaceView;
SurfaceHolder surfaceHolder;
PictureCallback rawCallback;
ShutterCallback shutterCallback;
PictureCallback jpegCallback;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
surfaceView = (SurfaceView) findViewById(R.id.surfaceView);
surfaceHolder = surfaceView.getHolder();
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
surfaceHolder.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(String.format("/sdcard/%d.jpg", System.currentTimeMillis()));
outStream.write(data);
outStream.close();
Log.d("Log", "onPictureTaken - wrote bytes: " + data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
Toast.makeText(getApplicationContext(), "Picture Saved", 2000).show();
refreshCamera();
}
};
}
public void captureImage(View v) throws IOException {
//take the picture
camera.takePicture(null, null, jpegCallback);
}
public void refreshCamera() {
if (surfaceHolder.getSurface() == null) {
// preview surface does not exist
return;
}
// stop preview before making changes
try {
camera.stopPreview();
} catch (Exception e) {
// ignore: tried to stop a non-existent preview
}
// set preview size and make any resize, rotate or
// reformatting changes here
// start preview with new settings
try {
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
} catch (Exception e) {
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// Now that the size is known, set up the camera parameters and begin
// the preview.
refreshCamera();
}
public void surfaceCreated(SurfaceHolder holder) {
try {
// open the camera
camera = Camera.open();
} catch (RuntimeException e) {
// check for exceptions
System.err.println(e);
return;
}
Camera.Parameters param;
param = camera.getParameters();
// modify parameter
param.setPreviewSize(352, 288);
camera.setParameters(param);
try {
// The Surface has been created, now tell the camera where to draw
// the preview.
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
} catch (Exception e) {
// check for exceptions
System.err.println(e);
return;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// stop preview and release camera
camera.stopPreview();
camera.release();
camera = null;
}
Camera camera;
SurfaceView surfaceView2;
SurfaceHolder surfaceHolder2;
PictureCallback rawCallback;
ShutterCallback shutterCallback;
PictureCallback jpegCallback;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
surfaceView2 = (SurfaceView) findViewById(R.id.surfaceView2);
surfaceHolder2 = surfaceView2.getHolder();
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
surfaceHolder2.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(String.format("/sdcard/%d.jpg", System.currentTimeMillis()));
outStream.write(data);
outStream.close();
Log.d("Log", "onPictureTaken - wrote bytes: " + data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
Toast.makeText(getApplicationContext(), "Picture Saved", 2000).show();
refreshCamera();
}
};
}
public void captureImage(View v) throws IOException {
//take the picture
camera.takePicture(null, null, jpegCallback);
}
public void refreshCamera() {
if (surfaceHolder2.getSurface() == null) {
// preview surface does not exist
return;
}
// stop preview before making changes
try {
camera.stopPreview();
} catch (Exception e) {
// ignore: tried to stop a non-existent preview
}
// set preview size and make any resize, rotate or
// reformatting changes here
// start preview with new settings
try {
camera.setPreviewDisplay(surfaceHolder2);
camera.startPreview();
} catch (Exception e) {
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// Now that the size is known, set up the camera parameters and begin
// the preview.
refreshCamera();
}
public void surfaceCreated(SurfaceHolder holder) {
try {
// open the camera
camera = Camera.open();
} catch (RuntimeException e) {
// check for exceptions
System.err.println(e);
return;
}
Camera.Parameters param;
param = camera.getParameters();
// modify parameter
param.setPreviewSize(352, 288);
camera.setParameters(param);
try {
// The Surface has been created, now tell the camera where to draw
// the preview.
camera.setPreviewDisplay(surfaceHolder2);
camera.startPreview();
} catch (Exception e) {
// check for exceptions
System.err.println(e);
return;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// stop preview and release camera
camera.stopPreview();
camera.release();
camera = null;
}
<SurfaceView
android:id="@+id/surfaceView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
<SurfaceView
android:id="@+id/surfaceView2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
</LinearLayout>
重要更新:
Camera camera;
SurfaceView surfaceView;
SurfaceHolder surfaceHolder;
PictureCallback rawCallback;
ShutterCallback shutterCallback;
PictureCallback jpegCallback;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
surfaceView = (SurfaceView) findViewById(R.id.surfaceView);
surfaceHolder = surfaceView.getHolder();
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
surfaceHolder.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(String.format("/sdcard/%d.jpg", System.currentTimeMillis()));
outStream.write(data);
outStream.close();
Log.d("Log", "onPictureTaken - wrote bytes: " + data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
Toast.makeText(getApplicationContext(), "Picture Saved", 2000).show();
refreshCamera();
}
};
}
public void captureImage(View v) throws IOException {
//take the picture
camera.takePicture(null, null, jpegCallback);
}
public void refreshCamera() {
if (surfaceHolder.getSurface() == null) {
// preview surface does not exist
return;
}
// stop preview before making changes
try {
camera.stopPreview();
} catch (Exception e) {
// ignore: tried to stop a non-existent preview
}
// set preview size and make any resize, rotate or
// reformatting changes here
// start preview with new settings
try {
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
} catch (Exception e) {
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// Now that the size is known, set up the camera parameters and begin
// the preview.
refreshCamera();
}
public void surfaceCreated(SurfaceHolder holder) {
try {
// open the camera
camera = Camera.open();
} catch (RuntimeException e) {
// check for exceptions
System.err.println(e);
return;
}
Camera.Parameters param;
param = camera.getParameters();
// modify parameter
param.setPreviewSize(352, 288);
camera.setParameters(param);
try {
// The Surface has been created, now tell the camera where to draw
// the preview.
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
} catch (Exception e) {
// check for exceptions
System.err.println(e);
return;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// stop preview and release camera
camera.stopPreview();
camera.release();
camera = null;
}
Camera camera;
SurfaceView surfaceView2;
SurfaceHolder surfaceHolder2;
PictureCallback rawCallback;
ShutterCallback shutterCallback;
PictureCallback jpegCallback;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
surfaceView2 = (SurfaceView) findViewById(R.id.surfaceView2);
surfaceHolder2 = surfaceView2.getHolder();
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
surfaceHolder2.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
jpegCallback = new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
FileOutputStream outStream = null;
try {
outStream = new FileOutputStream(String.format("/sdcard/%d.jpg", System.currentTimeMillis()));
outStream.write(data);
outStream.close();
Log.d("Log", "onPictureTaken - wrote bytes: " + data.length);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally {
}
Toast.makeText(getApplicationContext(), "Picture Saved", 2000).show();
refreshCamera();
}
};
}
public void captureImage(View v) throws IOException {
//take the picture
camera.takePicture(null, null, jpegCallback);
}
public void refreshCamera() {
if (surfaceHolder2.getSurface() == null) {
// preview surface does not exist
return;
}
// stop preview before making changes
try {
camera.stopPreview();
} catch (Exception e) {
// ignore: tried to stop a non-existent preview
}
// set preview size and make any resize, rotate or
// reformatting changes here
// start preview with new settings
try {
camera.setPreviewDisplay(surfaceHolder2);
camera.startPreview();
} catch (Exception e) {
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
// Now that the size is known, set up the camera parameters and begin
// the preview.
refreshCamera();
}
public void surfaceCreated(SurfaceHolder holder) {
try {
// open the camera
camera = Camera.open();
} catch (RuntimeException e) {
// check for exceptions
System.err.println(e);
return;
}
Camera.Parameters param;
param = camera.getParameters();
// modify parameter
param.setPreviewSize(352, 288);
camera.setParameters(param);
try {
// The Surface has been created, now tell the camera where to draw
// the preview.
camera.setPreviewDisplay(surfaceHolder2);
camera.startPreview();
} catch (Exception e) {
// check for exceptions
System.err.println(e);
return;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// stop preview and release camera
camera.stopPreview();
camera.release();
camera = null;
}
<SurfaceView
android:id="@+id/surfaceView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
<SurfaceView
android:id="@+id/surfaceView2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
</LinearLayout>
我发现通过编辑AndroidManifest.xml文件并删除第二个活动是launcher,我们可以去掉主屏幕上的两个应用程序图标
但安装时这样做生成的apk会打开,只在左侧表面视图上显示相机预览,右侧表面视图显示黑色
谢谢,希望你们能帮我:)我也在做类似的任务。你为什么决定上两节课?你解决问题了吗?嘿@Geeve George和Niels…你们都解决了这个问题…如果是的话,请帮助我…我还想在单个活动中预览多个摄像头…我已经在这里问了一个问题…请检查并告诉我你是否知道这是一个紧急问题…请…我的问题链接是。。。。。。。