Android 安卓；不幸的是，它已经停止了；错误
我是android编程新手。我只想在安卓系统中定制相机。为了做到这一点，我使用了这个网站（） 虽然我遵循了网站中的步骤，但还是出现了一个错误“不幸的是，您的应用程序已停止”。我搜索了所有关于“不幸已经停止”的问题，并在这里阅读了答案。但是他们没有帮助我。请帮帮我 这是我的cameraActivity代码：Android 安卓；不幸的是，它已经停止了；错误,android,Android,我是android编程新手。我只想在安卓系统中定制相机。为了做到这一点，我使用了这个网站（） 虽然我遵循了网站中的步骤，但还是出现了一个错误“不幸的是，您的应用程序已停止”。我搜索了所有关于“不幸已经停止”的问题，并在这里阅读了答案。但是他们没有帮助我。请帮帮我 这是我的cameraActivity代码： public class CameraActivity extends Activity { protected static final String TAG = null; protec
public class CameraActivity extends Activity {
protected static final String TAG = null;
protected static final String MEDIA_TYPE_IMAGE = ".jpeg";
private static Camera mCamera;
private CameraPreview mPreview;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_camera);
// Create an instance of Camera
mCamera = getCameraInstance();
// Create our Preview view and set it as the content of our activity.
mPreview = new CameraPreview(this, mCamera);
FrameLayout preview = (FrameLayout) findViewById (R.id.camera_preview);
preview.addView(mPreview);
final PictureCallback mPicture = new PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
File pictureFile = getOutputMediaFile(MEDIA_TYPE_IMAGE);
if (pictureFile == null){
Throwable e = null;
Log.d(TAG, "Error creating media file, check storage permissions: " +
e.getMessage());
return;
}
try {
FileOutputStream fos = new FileOutputStream(pictureFile);
fos.write(data);
fos.close();
} catch (FileNotFoundException e) {
Log.d(TAG, "File not found: " + e.getMessage());
} catch (IOException e) {
Log.d(TAG, "Error accessing file: " + e.getMessage());
}
}
private File getOutputMediaFile(String mediaTypeImage) {
// TODO Auto-generated method stub
return null;
}
};
Button captureButton = (Button) findViewById(id.button_capture);
captureButton.setOnClickListener(
new View.OnClickListener() {
@Override
public void onClick(View v) {
// get an image from the camera
mCamera.takePicture(null, null, mPicture);
}});}
public static Camera getCameraInstance(){
Camera c = null;
try {
c = Camera.open(); // attempt to get a Camera instance
}
catch (Exception e){
// Camera is not available (in use or does not exist)
}
return c; // returns null if camera is unavailable
}}
如果在应用程序首次启动时发生，则相机对象为空或支架为空 但是，如果在第二次导航到摄影机视图时发生这种情况，则摄影机将保留在上一个视图中，并且第二次无法访问，则必须在暂停视图或销毁视图时释放摄影机
希望它能有所帮助从这里看，
getCameraInstanceCamera.open（）mcamera.open（）null.open（）public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback {
private SurfaceHolder mHolder;
private Camera mcamera;
public CameraPreview(Context context,Camera camera){
super(context);
mcamera=camera;
mHolder=getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
public void surfaceCreated(SurfaceHolder holder) {
// The Surface has been created, now tell the camera where to draw the preview.
try {
mcamera.setPreviewDisplay(holder);
mcamera.startPreview();
} catch (IOException e) {
Log.d(TAG, "Error setting camera preview: " + e.getMessage());
}
}