Java 调用Camera.release()后,正在使用Camera
按下我的Android应用程序中的“拍照”按钮后,相机崩溃,并显示以下错误消息:Java 调用Camera.release()后,正在使用Camera,java,android,android-ndk,android-camera,rhomobile,Java,Android,Android Ndk,Android Camera,Rhomobile,按下我的Android应用程序中的“拍照”按钮后,相机崩溃,并显示以下错误消息: E 03/21/2016 10:29:49:164 000007d1 CameraObject| Camera is being used after Camera.release() was called java.lang.RuntimeException: Camera is being used after Camera.release() was called at android.hardware.Ca
E 03/21/2016 10:29:49:164 000007d1 CameraObject| Camera is being used after Camera.release() was called
java.lang.RuntimeException: Camera is being used after Camera.release() was called
at android.hardware.Camera._stopPreview(Native Method)
at android.hardware.Camera.stopPreview(Camera.java:730)
at com.rho.camera.CameraObject.stopPreview(CameraObject.java:435)
at com.rho.camera.CameraActivity.onDestroy(CameraActivity.java:131)
at android.app.Activity.performDestroy(Activity.java:6407)
at android.app.Instrumentation.callActivityOnDestroy(Instrumentation.java:1142)
at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3818)
at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:3849)
at android.app.ActivityThread.-wrap5(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1398)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
该应用程序使用Rhomobile 5.4开发,相关源代码位于GitHub上:
- CAEMRA活动:
- 摄影机对象:
我对Android开发不太熟悉。这真的是太晚了,但当我在一分钟前设法解决了我的一个类似问题时,我想我会为你自己和其他可能拼命搜索堆栈的人的利益做出贡献 因此,当您旋转设备时,您正在调用暂停和onDestroy,在那里您正在释放相机。我注意到你的简历中确实有camera.open(),没有看一下你的表面相关代码,我无法评论。这就是对我有用的东西 首先,是检讨
public void surfaceChanged(SurfaceHolder surfaceHolder, int format, int width, int height) {
try {
this.mCamera.setPreviewDisplay(surfaceHolder);
this.mCamera.startPreview();
} catch (Exception e) {
}
}
public void surfaceCreated(SurfaceHolder surfaceHolder) {
try {
//TODO we need this here too because on SurfaceCreated we always need to open the camera, in case its released
this.mCamera.setPreviewDisplay(surfaceHolder);
this.mCamera.setDisplayOrientation(90);
//this.mCamera.startPreview();
} catch (IOException e) {
}
}
接下来是Camera活动
@Override
public void onResume() {
super.onResume();
try{
mCamera = openFrontFacingCameraGingerbread();
// Add to Framelayout
this.mCameraPreview = new CameraPreview(this, this.mCamera);
mImage.removeAllViews();
this.mImage.addView(this.mCameraPreview);
}catch (RuntimeException ex){
}
}
@Override
public void onPause() {
super.onPause();
captureButton.setText("Begin Capture");
if(CameraActivity.this.timer !=null) {
CameraActivity.this.timer.cancel();
CameraActivity.this.timer.purge();
CameraActivity.this.timer = null;
}
if (mCamera != null) {
mCamera.setPreviewCallback(null);
mCameraPreview.getHolder().removeCallback(mCameraPreview);
mCamera.release();
mCamera = null;
}
}
@Override
protected void onDestroy(){
super.onDestroy();
releaseCameraAndPreview();
}
private void releaseCameraAndPreview() {
if (mCamera != null) {
mCamera.stopPreview();
mCamera.release();
mCamera = null;
}
if(mCameraPreview != null){
mCameraPreview.destroyDrawingCache();
mCameraPreview.mCamera = null;
}
}