If i am 不使用 相机.release(); in 表面被破坏(....) then 无法从另一个 Activity 再次启动 CameraActivity[简而言之，得到不幸的是应用程序已停止] 错误，即使不释放相机，但如果我确实点击了“主页”按钮 [来自相机活动]， 进而再次启动我的应用程序，没有收到任何错误（总之工作正常，打开 CameraActivity 没有任何问题）
如果我是using *相机.release();* in 表面被破坏(....) then 能够从另一个 Activity 再次启动 CameraActivity and 同时释放相机, but 当我点击“主页”按钮，然后再次启动我的应用程序时，不幸的是应用程序已停止....:
But i 希望两者协同工作（第一的，从 CameraActivity 中点击“主页”，然后再次从 CameraActivity 中启动应用程序- 没有任何错误）和（第二，从另一个活动启动相机- 没有任何错误）
就像我写的那样，这两件事都对我有用，但不能同时发挥作用......
第 33 行是：
Camera.Parameters parameters = mCamera.getParameters();
完整日志：
12-30 12:18:58.070: W/dalvikvm(14822): threadid=1: thread exiting with uncaught exception (group=0x41ef72a0)
12-30 12:18:58.080: E/AndroidRuntime(14822): FATAL EXCEPTION: main
12-30 12:18:58.080: E/AndroidRuntime(14822): java.lang.RuntimeException: Method called after release()
12-30 12:18:58.080: E/AndroidRuntime(14822): at android.hardware.Camera.native_getParameters(Native Method)
12-30 12:18:58.080: E/AndroidRuntime(14822): at android.hardware.Camera.getParameters(Camera.java:1487)
12-30 12:18:58.080: E/AndroidRuntime(14822): at app.micheal.camr.PreviewSurface.surfaceCreated(PreviewSurface.java:33)
12-30 12:18:58.080: E/AndroidRuntime(14822): at android.view.SurfaceView.updateWindow(SurfaceView.java:609)
12-30 12:18:58.080: E/AndroidRuntime(14822): at android.view.SurfaceView.onWindowVisibilityChanged(SurfaceView.java:235)
12-30 12:18:58.080: E/AndroidRuntime(14822): at android.view.View.dispatchWindowVisibilityChanged(View.java:7686)
12-30 12:18:58.080: E/AndroidRuntime(14822): at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
12-30 12:18:58.080: E/AndroidRuntime(14822): at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
12-30 12:18:58.080: E/AndroidRuntime(14822): at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
12-30 12:18:58.080: E/AndroidRuntime(14822): at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
12-30 12:18:58.080: E/AndroidRuntime(14822): at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:1047)
12-30 12:18:58.080: E/AndroidRuntime(14822): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1339)
12-30 12:18:58.080: E/AndroidRuntime(14822): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1114)
12-30 12:18:58.080: E/AndroidRuntime(14822): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4520)
12-30 12:18:58.080: E/AndroidRuntime(14822): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
12-30 12:18:58.080: E/AndroidRuntime(14822): at android.view.Choreographer.doCallbacks(Choreographer.java:555)
12-30 12:18:58.080: E/AndroidRuntime(14822): at android.view.Choreographer.doFrame(Choreographer.java:525)
12-30 12:18:58.080: E/AndroidRuntime(14822): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
12-30 12:18:58.080: E/AndroidRuntime(14822): at android.os.Handler.handleCallback(Handler.java:615)
12-30 12:18:58.080: E/AndroidRuntime(14822): at android.os.Handler.dispatchMessage(Handler.java:92)
12-30 12:18:58.080: E/AndroidRuntime(14822): at android.os.Looper.loop(Looper.java:137)
12-30 12:18:58.080: E/AndroidRuntime(14822): at android.app.ActivityThread.main(ActivityThread.java:4921)
12-30 12:18:58.080: E/AndroidRuntime(14822): at java.lang.reflect.Method.invokeNative(Native Method)
12-30 12:18:58.080: E/AndroidRuntime(14822): at java.lang.reflect.Method.invoke(Method.java:511)
12-30 12:18:58.080: E/AndroidRuntime(14822): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1036)
12-30 12:18:58.080: E/AndroidRuntime(14822): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:803)
12-30 12:18:58.080: E/AndroidRuntime(14822): at dalvik.system.NativeStart.main(Native Method)
12-30 12:19:08.095: I/Process(14822): Sending signal. PID: 14822 SIG: 9
PreviewSurface.java：
public class PreviewSurface extends SurfaceView implements
SurfaceHolder.Callback {
public static final String LOG_TAG = "CameraPreview";
private SurfaceHolder mSurfaceHolder;
private Camera mCamera;
Camera.Parameters parameters = null ;
// Constructor that obtains context and camera
@SuppressWarnings("deprecation")
public PreviewSurface(Context context, Camera camera) {
super(context);
this.mCamera = camera;
this.mSurfaceHolder = this.getHolder();
this.mSurfaceHolder.addCallback(this);
this.mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
this.mSurfaceHolder.setFixedSize(100, 100);
}
@Override
public void surfaceCreated(SurfaceHolder surfaceHolder) {
try {
parameters = mCamera.getParameters();
if (this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE)
{
parameters.set("orientation", "portrait");
mCamera.setDisplayOrientation(90);
parameters.setRotation(90);
mCamera.setPreviewDisplay(surfaceHolder);
mCamera.startPreview();
}
else
{
// This is an undocumented although widely known feature
parameters.set("orientation", "landscape");
// For Android 2.2 and above
mCamera.setDisplayOrientation(0);
// Uncomment for Android 2.0 and above
parameters.setRotation(0);
}
mCamera.setPreviewDisplay(surfaceHolder);
mCamera.startPreview();
} catch (IOException e) {
// left blank for now
}
}
@Override
public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
mCamera.stopPreview();
mCamera.release();
}
@Override
public void surfaceChanged(SurfaceHolder surfaceHolder, int format,
int width, int height) {
try {
parameters = mCamera.getParameters();
if (this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE) {
parameters.set("orientation", "portrait");
mCamera.setDisplayOrientation(90);
parameters.setRotation(90);
}
else {
// This is an undocumented although widely known feature
parameters.set("orientation", "landscape");
// For Android 2.2 and above
mCamera.setDisplayOrientation(0);
// Uncomment for Android 2.0 and above
parameters.setRotation(0);
}
mCamera.setPreviewDisplay(surfaceHolder);
mCamera.startPreview();
} catch (IOException e) {
// left blank for now
}
}
}
试试这个，用我的代码替换你的代码，我想这会对你有帮助，我没有尝试过，但看起来它会解决你的错误
@Override
public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
this.getHolder().removeCallback(this);
mCamera.stopPreview();
mCamera.release();
}
尽快让我知道...
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