在调用Camera.release()之后正在使用Camera [英] Camera is being used after Camera.release() was called
问题描述
在我的Android应用中按下拍照"按钮后,相机崩溃并显示以下错误消息:
After pressing the take a picture button in my Android app, the camera crashes with the following error message:
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)
该应用是使用Rhomobile 5.4开发的,相关的源代码在GitHub上:
The app is developed using Rhomobile 5.4 and the relevant source code is on GitHub:
- CaemraActivity: https://github.com/rhomobile/rhodes/blob/5-4-stable/lib/commonAPI/mediacapture/ext/platform/android/src/com/rho/camera/CameraObject.java
- CaemraActivity: https://github.com/rhomobile/rhodes/blob/5-4-stable/lib/commonAPI/mediacapture/ext/platform/android/src/com/rho/camera/CameraActivity.java
- CameraObject: https://github.com/rhomobile/rhodes/blob/5-4-stable/lib/commonAPI/mediacapture/ext/platform/android/src/com/rho/camera/CameraObject.java
我将Rhomobile 5.4与以下SDK结合使用: -minSDK 21 -Android SDK 5.1.1 -Android NDK 10e -Java 7 u80 SDK -在OS X上
I'm using Rhomobile 5.4 with the following SDKs: - minSDK 21 - Android SDK 5.1.1 - Android NDK 10e - Java 7 u80 SDK - On OS X
我对Android开发不熟悉.
I'm not familiar with Android development.
推荐答案
这确实过期,但由于我在一分钟前设法解决了我的类似问题,我认为我会为自己和其他人的利益做出贡献谁会拼命搜索Stack.
This is really overdue but as I managed to solve a similar problem of mine a minute ago, I thought I'd contribute for the benefit of yourself and anyone else who might be desperately searching Stack.
因此,旋转设备时,您将在释放相机的同时调用onPause和onDestroy.我注意到您的onResume中确实有camera.open(),而没有看您无法评论的与表面相关的代码.这对我有用.
So when you rotate the device, you are calling onPause and onDestroy, where you are releasing your camera. I noticed you do have camera.open() in your onResume, without a look at your surface-related code I cannot comment. Heres what worked for me.
首先,cameraPreview
Firstly, the cameraPreview
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,CameraActivity
Next, the CameraActivity
@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;
}
}
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