単一のアクティビティ インテントで前面の画像と背面の画像を取得するアプリを作成しようとしています。前面カメラのコードは以下と同じで、完全に正常に動作します。finish を呼び出して表面を破壊し、onSurfaceDestroy() 内で initBackCam( を呼び出します。 ) 以下に示すメソッドは、onSurfaceChanged() 内の onSurfaceChanged() まで正常に動作します。例外をスローしている pCamera.takePicture(null,mPictureCallback,mPictureCallback) を呼び出しています
注：このコードは、キットカットがロリポップとマシュマロで失敗するまで正常に機能します
フロントカメラとバックカメラの間で遅延を試みましたが、バックカメラのコードを別のアクティビティに配置しようとしましたが、それでも同じエラーがスローされました。写真を撮る前にカメラを解放して startPreview() を呼び出しましたが、それでも同じエラーがスローされました
私は次の権限を使用しました
<uses-permission android:name="android.permission.CAMERA"/>
<uses-feature android:name="android.hardware.camera" android:required="false" />
<uses-feature android:name="android.hardware.camera.front" android:required="false" />
<uses-feature android:name="android.hardware.camera.back" android:required="false" />
助けてください！！！！
public static Bitmap bitmap;
public SurfaceHolder pSurfaceHolder;
private Camera pCamera;
private boolean pPreviewRunning = false;
private RelativeLayout pCameraPreview;
private BackCameraService backCam;
private void initBackCamera() {
pCameraPreview = (RelativeLayout) findViewById(R.id.preview_back_camera);
backCam = new BackCameraService(getBaseContext(), pCamera);
pCameraPreview.addView(backCam);
}
public class BackCameraService extends SurfaceView implements SurfaceHolder.Callback {
public Camera pCamera;
private Context pContext;
Camera.PictureCallback mBackPictureCallback = new Camera.PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
pCamera = camera;
if (data != null) {
pCamera.stopPreview();
pPreviewRunning = false;
pCamera.release();
try {
BitmapFactory.Options opts = new BitmapFactory.Options();
opts.inScaled = false;
bitmap = BitmapFactory.decodeByteArray(data, 0, data.length, opts);
Matrix matrix = new Matrix();
matrix.postRotate(-90);
File(Environment.getExternalStorageDirectory(), "MyImage");
if (!(root.isDirectory() && root.exists())) root.mkdirs();
File backImg = new File(root.getAbsolutePath(), "backImg");
if (!(backImg.isDirectory() && backImg.exists())) backImg.mkdirs();
File file = new File(backImg.getAbsolutePath(), "backImage.jpg");
try {
file.createNewFile();
FileOutputStream ostream = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.JPEG, 75, ostream);
ostream.close();
} catch (Exception e) {
e.printStackTrace();
}
} catch (Exception e) {
e.printStackTrace();
}
setResult(585);
}
}
};
BackCameraService(Context context, Camera camera) {
super(context);
Log.d("jagteraho", "backCam started");
pContext = context;
pCamera = camera;
pSurfaceHolder = getHolder();
pSurfaceHolder.addCallback(BackCameraService.this);
pSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
surfaceCreated(pSurfaceHolder);
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
Log.d("jagteraho", "backCam surface created");
pCamera = Camera.open(Camera.CameraInfo.CAMERA_FACING_BACK);
surfaceChanged(holder, 2, 2, 2);
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
Log.d("jagteraho", "backCam surface changed");
if (pPreviewRunning) {
pCamera.stopPreview();
}
Camera.Parameters p = pCamera.getParameters();
List<Camera.Size> previewSizes = p.getSupportedPreviewSizes();
Camera.Size previewSize = previewSizes.get(1);
p.setPreviewSize(previewSize.width, previewSize.height);
try {
pCamera.setParameters(p);
pCamera.setPreviewDisplay(holder);
} catch (Exception e) {
e.printStackTrace();
}
pCamera.startPreview();
pPreviewRunning = true;
pCamera.takePicture(null, mBackPictureCallback, mBackPictureCallback);
surfaceDestroyed(holder);
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
Log.d("jagteraho", "backCam surface destroyed");
}
}
ログは次のとおりです。
02-15 19:18:11.159 6382-6382 surface created
02-15 19:18:11.161 206-892/? I/CameraService﹕ CameraService::connect call (PID 6382 , camera ID 1) for HAL version default and Camera API version 1
02-15 19:18:11.222 206-892/? I/Camera2ClientBase﹕ Camera 1: Opened. Client: (PID 6382, UID 10037)
02-15 19:18:11.485 6382-6382 surface changed
02-15 19:18:11.553 779-800/? I/ActivityManager﹕ Displayed +473ms
02-15 19:18:13.849 206-818/? I/Camera2ClientBase﹕ Closed Camera 1. Client was: (PID 6382, UID 10037)
02-15 19:18:14.102 6382-6382 ﹕ surface destroyed
02-15 19:18:14.103 6382-6382 ﹕ backCam started
02-15 19:18:14.103 6382-6382 ﹕ backCam surface created
02-15 19:18:14.103 206-1764/? I/CameraService﹕ CameraService::connect call (PID 6382 , camera ID 0) for HAL version default and Camera API version 1
02-15 19:18:14.165 206-1764/? I/Camera2ClientBase﹕ Camera 0: Opened. Client:(PID 6382, UID 10037)
02-15 19:18:14.238 6382-6382 ﹕ backCam surface changed
02-15 19:18:14.240 6382-6382 ﹕ app passed NULL surface
02-15 19:18:14.241 6382-6382 D/AndroidRuntime﹕ Shutting down VM
02-15 19:18:14.243 6382-6382 E/CustomActivityOnCrash﹕ App has crashed, executing CustomActivityOnCrash's UncaughtExceptionHandler
java.lang.RuntimeException: takePicture failed
at android.hardware.Camera.native_takePicture(Native Method)
at android.hardware.Camera.takePicture(Camera.java:1434)
at android.hardware.Camera.takePicture(Camera.java:1379)
at com.aspeage.jagteraho.AlarmActivity$BackCameraService.surfaceChanged(AlarmActivity.java:922)
at com.aspeage.jagteraho.AlarmActivity$BackCameraService.surfaceCreated(AlarmActivity.java:872)
at com.aspeage.jagteraho.AlarmActivity$BackCameraService.<init>(AlarmActivity.java:865)
at com.aspeage.jagteraho.AlarmActivity.initBackCamera(AlarmActivity.java:788)
at com.aspeage.jagteraho.AlarmActivity.access$400(AlarmActivity.java:77)
at com.aspeage.jagteraho.AlarmActivity$FrontCameraService.surfaceDestroyed(AlarmActivity.java:782)
at android.view.SurfaceView.updateWindow(SurfaceView.java:567)
at android.view.SurfaceView.onWindowVisibilityChanged(SurfaceView.java:239)
at android.view.View.dispatchWindowVisibilityChanged(View.java:9647)
at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1309)
at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1309)
at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1309)
at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1309)
at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1309)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1383)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1107)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6013)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
at android.view.Choreographer.doCallbacks(Choreographer.java:670)
at android.view.Choreographer.doFrame(Choreographer.java:606)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)