Android Moto Droid相机在每次拍摄照片时都会挂起
总之,我一次又一次地在谷歌上寻找解决方案,虽然我发现了一个关于相机发布等的bug,但我似乎一辈子都无法让cam代码正常工作。每次我执行takePicture时,系统都会挂起,有时它会调用Android Moto Droid相机在每次拍摄照片时都会挂起,android,camera,Android,Camera,总之,我一次又一次地在谷歌上寻找解决方案,虽然我发现了一个关于相机发布等的bug,但我似乎一辈子都无法让cam代码正常工作。每次我执行takePicture时,系统都会挂起,有时它会调用PictureCallback,但大多数时候它只是挂起 无法读取/data/ap\u gain.bin文件等奇怪问题 下面是代码: public class CameraActivity extends Activity implements Camera.PictureCallback, RequestCons
PictureCallback
,但大多数时候它只是挂起
无法读取/data/ap\u gain.bin文件等奇怪问题
下面是代码:
public class CameraActivity extends Activity implements Camera.PictureCallback, RequestConstants {
private static final String TAG = "Camera";
private Preview preview;
private boolean previewRunning;
private int addressNotificationId;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addressNotificationId = getIntent().getIntExtra(REQ_RA_ID, 0);
getWindow().setFormat(PixelFormat.TRANSLUCENT);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
if (preview == null) {
preview = new Preview(this);
}
setContentView(preview);
}
@Override
protected void onDestroy() {
if (isFinishing()) {
preview.cleanup();
}
super.onDestroy();
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_CAMERA) {
/*
preview.setDrawingCacheEnabled(true);
Bitmap ss = preview.getDrawingCache();
byte[] data = ImageUtility.getImageData(ss,75,1);
Log.v(TAG, "Pic with size: " + data.length);
ApplicationManager.getInstance().createPacketRecord(PacketConstants.PT_FLAG_ADDRESS_PHOTO, ApplicationDatabaseManager.getInstance().getRouteAddressBySystemId(addressNotificationId), data);
finish();
*/
preview.getCamera().takePicture(new Camera.ShutterCallback() {
@Override
public void onShutter() {
}
}, null, this);
return true;
}
return super.onKeyDown(keyCode, event);
}
@Override
public void onPictureTaken(byte[] data, Camera camera) {
/*
if (data == null || isFinishing())
return;
camera.stopPreview();
previewRunning = false;
camera.release();
*/
//Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0,data.length);
//data = null;
//data = ImageUtility.getImageData(bitmap, 75,1);
Log.v(TAG, "Pic with size: " + data.length);
ApplicationManager.getInstance().createPacketRecord(PacketConstants.PT_FLAG_ADDRESS_PHOTO, ApplicationDatabaseManager.getInstance().getRouteAddressBySystemId(addressNotificationId), data);
finish();
}
}
class Preview extends SurfaceView implements SurfaceHolder.Callback {
SurfaceHolder mHolder;
Camera mCamera;
Preview(Context context) {
super(context);
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
mHolder = getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
Camera getCamera() {
return mCamera;
}
void cleanup() {
mCamera.stopPreview();
mCamera.release();
mCamera = null;
}
public void surfaceCreated(SurfaceHolder holder) {
if (mCamera == null)
mCamera = Camera.open();
try {
mCamera.setPreviewDisplay(holder);
} catch (IOException exception) {
mCamera.release();
mCamera = null;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
Camera.Parameters parameters = mCamera.getParameters();
parameters.setPreviewSize(w, h);
parameters.setPictureSize(w, h);
mCamera.setParameters(parameters);
mCamera.startPreview();
}
}
调用JpegPictureCallback后,需要再次调用mCamera.startPreview API摄像头示例中没有足够的信息来真正编写摄像头应用程序,但是您可以在这里获得谷歌自己的摄像头应用程序的源代码。java包含许多重要、有用的代码:
git://android.git.kernel.org/platform/packages/apps/Camera.git调用JPEG PictureCallback后,需要再次调用mCamera.startPreview API摄像头示例中没有足够的信息来真正编写摄像头应用程序,但是您可以在这里获得谷歌自己的摄像头应用程序的源代码。java包含许多重要、有用的代码:
git://android.git.kernel.org/platform/packages/apps/Camera.git您有时在拍照,有时不拍照,因为您在回调发生之前释放了相机 当回调启动时,取决于相机是否已释放,它将或将无法访问拍摄的照片 我建议你拍照时不要松开相机或关闭表格 更好的是,从照片回调中关闭表单
此外,当拍摄照片时,android的默认操作是停止预览。这不是一个bug,而是预期的性质。您有时正在拍照,有时不拍照,因为您在回调发生之前释放相机 当回调启动时,取决于相机是否已释放,它将或将无法访问拍摄的照片 我建议你拍照时不要松开相机或关闭表格 更好的是,从照片回调中关闭表单
此外,当拍摄照片时,android的默认操作是停止预览。这不是一个bug,而是预期的特性。我对Nexus One也有同样的问题。我听到快门声,然后什么也没听到。在调试日志中,我看到“AudoHardware pcm播放将进入待机状态”。你有什么进展吗?Nexus One也有同样的问题。我听到快门声,然后什么也没听到。在调试日志中,我看到“AudoHardware pcm播放将进入待机状态”。你有什么进展吗?