Java 摄像机活动不工作，设置参数失败
我正在尝试在启动应用程序时打开相机活动。 也就是说，当我启动应用程序时，它将通过前置摄像头捕捉图像。 然而，当我启动应用程序时，我发现了一个错误。 我实际上是在尝试运行从github获得的代码；但是，它只是强制重新启动应用程序Java 摄像机活动不工作，设置参数失败,java,android,Java,Android,我正在尝试在启动应用程序时打开相机活动。 也就是说，当我启动应用程序时，它将通过前置摄像头捕捉图像。 然而，当我启动应用程序时，我发现了一个错误。 我实际上是在尝试运行从github获得的代码；但是，它只是强制重新启动应用程序 E/AndroidRuntime: FATAL EXCEPTION: main Process: com.androidmyway.demo.capturecameraimage, PID: 5697 java.lang.RuntimeException: setPara
E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.androidmyway.demo.capturecameraimage, PID: 5697
java.lang.RuntimeException: setParameters failed
at android.hardware.Camera.native_setParameters(Native Method)
at android.hardware.Camera.setParameters(Camera.java:1966)
at com.androidmyway.demo.capturecameraimage.CameraView.surfaceChanged(CameraView.java:140)
at android.view.SurfaceView.updateWindow(SurfaceView.java:634)
at android.view.SurfaceView$3.onPreDraw(SurfaceView.java:161)
at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:944)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2205)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1250)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6311)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:871)
at android.view.Choreographer.doCallbacks(Choreographer.java:683)
at android.view.Choreographer.doFrame(Choreographer.java:619)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:857)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:241)
at android.app.ActivityThread.main(ActivityThread.java:6217)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
public class CameraView extends Activity implements SurfaceHolder.Callback, OnClickListener{
private static final String TAG = "CameraTest";
Camera mCamera;
boolean mPreviewRunning = false;
@SuppressWarnings("deprecation")
public void onCreate(Bundle icicle){
super.onCreate(icicle);
Log.e(TAG, "onCreate");
getWindow().setFormat(PixelFormat.TRANSLUCENT);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.cameraview);
ImageView img = (ImageView) findViewById(R.id.blankImage);
if(CaptureCameraImage.isBlack)
img.setBackgroundResource(android.R.color.black);
else
img.setBackgroundResource(android.R.color.white);
mSurfaceView = (SurfaceView) findViewById(R.id.surface_camera);
mSurfaceView.setOnClickListener(this);
mSurfaceHolder = mSurfaceView.getHolder();
mSurfaceHolder.addCallback(this);
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState){
super.onRestoreInstanceState(savedInstanceState);
}
Camera.PictureCallback mPictureCallback = new Camera.PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
// TODO Auto-generated method stub
if (data != null){
//Intent mIntent = new Intent();
//mIntent.putExtra("image",imageData);
mCamera.stopPreview();
mPreviewRunning = false;
mCamera.release();
try{
BitmapFactory.Options opts = new BitmapFactory.Options();
Bitmap bitmap= BitmapFactory.decodeByteArray(data, 0, data.length,opts);
bitmap = Bitmap.createScaledBitmap(bitmap, 300, 300, false);
int width = bitmap.getWidth();
int height = bitmap.getHeight();
int newWidth = 300;
int newHeight = 300;
// calculate the scale - in this case = 0.4f
float scaleWidth = ((float) newWidth) / width;
float scaleHeight = ((float) newHeight) / height;
// createa matrix for the manipulation
Matrix matrix = new Matrix();
// resize the bit map
matrix.postScale(scaleWidth, scaleHeight);
// rotate the Bitmap
matrix.postRotate(-90);
Bitmap resizedBitmap = Bitmap.createBitmap(bitmap, 0, 0,
width, height, matrix, true);
CaptureCameraImage.image.setImageBitmap(resizedBitmap);
}catch(Exception e){
e.printStackTrace();
}
//StoreByteImage(mContext, imageData, 50,"ImageName");
//setResult(FOTO_MODE, mIntent);
setResult(585);
finish();
}
}
};
protected void onResume(){
Log.e(TAG, "onResume");
super.onResume();
}
protected void onSaveInstanceState(Bundle outState){
super.onSaveInstanceState(outState);
}
protected void onStop(){
Log.e(TAG, "onStop");
super.onStop();
}
@TargetApi(9)
public void surfaceCreated(SurfaceHolder holder){
Log.e(TAG, "surfaceCreated");
mCamera = Camera.open(CaptureCameraImage.cameraID);
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
Log.e(TAG, "surfaceChanged");
// XXX stopPreview() will crash if preview is not running
if (mPreviewRunning){
mCamera.stopPreview();
}
Camera.Parameters p = mCamera.getParameters();
p.setPreviewSize(300, 300);
if(CaptureCameraImage.cameraID == 0){
String stringFlashMode = p.getFlashMode();
if (stringFlashMode.equals("torch"))
p.setFlashMode("on"); // Light is set off, flash is set to normal 'on' mode
else
p.setFlashMode("torch");
}
mCamera.setParameters(p);
try{
mCamera.setPreviewDisplay(holder);
}catch (Exception e){
// TODO Auto-generated catch block
e.printStackTrace();
}
mCamera.startPreview();
mPreviewRunning = true;
mCamera.takePicture(null, mPictureCallback, mPictureCallback);
}
public void surfaceDestroyed(SurfaceHolder holder) {
Log.e(TAG, "surfaceDestroyed");
//mCamera.stopPreview();
//mPreviewRunning = false;
//mCamera.release();
}
private SurfaceView mSurfaceView;
private SurfaceHolder mSurfaceHolder;
public void onClick(View v) {
// TODO Auto-generated method stub
mCamera.takePicture(null, mPictureCallback, mPictureCallback);
}
}
public class CaptureCameraImage extends Activity {
public static int cameraID = 0;
public static boolean isBlack = true;
public static ImageView image;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activitycapturecameraimage);
image = (ImageView) findViewById(R.id.imgView);
}
public void onFrontClick(View v){
RadioButton rdbBlack = (RadioButton) findViewById(R.id.rdb_black);
if(rdbBlack.isChecked()){
isBlack = true;
}else{
isBlack = false;
}
cameraID = 1;
Intent i = new Intent(CaptureCameraImage.this,CameraView.class);
startActivityForResult(i, 999);
}
public void onBackClick(View v){
RadioButton rdbBlack = (RadioButton) findViewById(R.id.rdb_black);
if(rdbBlack.isChecked()){
isBlack = true;
}else{
isBlack = false;
}
cameraID = 0;
Intent i = new Intent(CaptureCameraImage.this,CameraView.class);
startActivityForResult(i, 999);
}
}
public class CameraView extends Activity implements SurfaceHolder.Callback, OnClickListener{
private static final String TAG = "CameraTest";
Camera mCamera;
boolean mPreviewRunning = false;
@SuppressWarnings("deprecation")
public void onCreate(Bundle icicle){
super.onCreate(icicle);
Log.e(TAG, "onCreate");
getWindow().setFormat(PixelFormat.TRANSLUCENT);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.cameraview);
ImageView img = (ImageView) findViewById(R.id.blankImage);
if(CaptureCameraImage.isBlack)
img.setBackgroundResource(android.R.color.black);
else
img.setBackgroundResource(android.R.color.white);
mSurfaceView = (SurfaceView) findViewById(R.id.surface_camera);
mSurfaceView.setOnClickListener(this);
mSurfaceHolder = mSurfaceView.getHolder();
mSurfaceHolder.addCallback(this);
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState){
super.onRestoreInstanceState(savedInstanceState);
}
Camera.PictureCallback mPictureCallback = new Camera.PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
// TODO Auto-generated method stub
if (data != null){
//Intent mIntent = new Intent();
//mIntent.putExtra("image",imageData);
mCamera.stopPreview();
mPreviewRunning = false;
mCamera.release();
try{
BitmapFactory.Options opts = new BitmapFactory.Options();
Bitmap bitmap= BitmapFactory.decodeByteArray(data, 0, data.length,opts);
bitmap = Bitmap.createScaledBitmap(bitmap, 300, 300, false);
int width = bitmap.getWidth();
int height = bitmap.getHeight();
int newWidth = 300;
int newHeight = 300;
// calculate the scale - in this case = 0.4f
float scaleWidth = ((float) newWidth) / width;
float scaleHeight = ((float) newHeight) / height;
// createa matrix for the manipulation
Matrix matrix = new Matrix();
// resize the bit map
matrix.postScale(scaleWidth, scaleHeight);
// rotate the Bitmap
matrix.postRotate(-90);
Bitmap resizedBitmap = Bitmap.createBitmap(bitmap, 0, 0,
width, height, matrix, true);
CaptureCameraImage.image.setImageBitmap(resizedBitmap);
}catch(Exception e){
e.printStackTrace();
}
//StoreByteImage(mContext, imageData, 50,"ImageName");
//setResult(FOTO_MODE, mIntent);
setResult(585);
finish();
}
}
};
protected void onResume(){
Log.e(TAG, "onResume");
super.onResume();
}
protected void onSaveInstanceState(Bundle outState){
super.onSaveInstanceState(outState);
}
protected void onStop(){
Log.e(TAG, "onStop");
super.onStop();
}
@TargetApi(9)
public void surfaceCreated(SurfaceHolder holder){
Log.e(TAG, "surfaceCreated");
mCamera = Camera.open(CaptureCameraImage.cameraID);
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
Log.e(TAG, "surfaceChanged");
// XXX stopPreview() will crash if preview is not running
if (mPreviewRunning){
mCamera.stopPreview();
}
Camera.Parameters p = mCamera.getParameters();
p.setPreviewSize(300, 300);
if(CaptureCameraImage.cameraID == 0){
String stringFlashMode = p.getFlashMode();
if (stringFlashMode.equals("torch"))
p.setFlashMode("on"); // Light is set off, flash is set to normal 'on' mode
else
p.setFlashMode("torch");
}
mCamera.setParameters(p);
try{
mCamera.setPreviewDisplay(holder);
}catch (Exception e){
// TODO Auto-generated catch block
e.printStackTrace();
}
mCamera.startPreview();
mPreviewRunning = true;
mCamera.takePicture(null, mPictureCallback, mPictureCallback);
}
public void surfaceDestroyed(SurfaceHolder holder) {
Log.e(TAG, "surfaceDestroyed");
//mCamera.stopPreview();
//mPreviewRunning = false;
//mCamera.release();
}
private SurfaceView mSurfaceView;
private SurfaceHolder mSurfaceHolder;
public void onClick(View v) {
// TODO Auto-generated method stub
mCamera.takePicture(null, mPictureCallback, mPictureCallback);
}
}
public class CaptureCameraImage extends Activity {
public static int cameraID = 0;
public static boolean isBlack = true;
public static ImageView image;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activitycapturecameraimage);
image = (ImageView) findViewById(R.id.imgView);
}
public void onFrontClick(View v){
RadioButton rdbBlack = (RadioButton) findViewById(R.id.rdb_black);
if(rdbBlack.isChecked()){
isBlack = true;
}else{
isBlack = false;
}
cameraID = 1;
Intent i = new Intent(CaptureCameraImage.this,CameraView.class);
startActivityForResult(i, 999);
}
public void onBackClick(View v){
RadioButton rdbBlack = (RadioButton) findViewById(R.id.rdb_black);
if(rdbBlack.isChecked()){
isBlack = true;
}else{
isBlack = false;
}
cameraID = 0;
Intent i = new Intent(CaptureCameraImage.this,CameraView.class);
startActivityForResult(i, 999);
}
}
之所以发生这种情况，是因为前面的
摄像头可能有闪光灯
。尝试使用flash\u MODE\u off
Camera.Parameters p = mCamera.getParameters();
p.setPreviewSize(300, 300);
if(CaptureCameraImage.cameraID == 0){
String stringFlashMode = p.getFlashMode();
if (stringFlashMode.equals("torch"))
p.setFlashMode("on"); // Light is set off, flash is set to normal 'on' mode
else
p.setFlashMode("torch");
}else{
p.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
}
mCamera.setParameters(p);
尽管有些设备支持任意预览大小，但有些设备不支持。因此，您必须在surfaceChanged方法上执行此操作
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
Camera.Parameters param = camera.getParameters();
List<Camera.Size> previewSizes = param.getSupportedPreviewSizes();
Camera.Size ps = // .... select a previewSize
param.setPreviewSize(ps.width, ps.height);
camera.setParameters(param);
camera.startPreview();
}
public void surfaceChanged（SurfaceHolder holder，int格式，int w，int h）{
Camera.Parameters param=Camera.getParameters（）；
List previewSizes=param.getSupportedPreviewSizes（）；
照相机。大小ps=/…选择预览大小
参数setPreviewSize（ps.width，ps.height）；
摄像机参数设置（参数）；
camera.startPreview（）；
}
当您遇到错误时？是前置还是后置摄像头
。您好，是前置摄像头ps.width和ps.height？预览大小。你必须给出尺寸、高度和宽度。