Question

我正在尝试将Camera2 api集成到我的应用程序中。某些设备出现崩溃。我在Stackoverflow上尝试了一些建议，但这些对我没有帮助。如何解决这个问题？

OnPause和OnStop of Activty：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_take_picture_new);
    startBackgroundThread();
}

@Override
public void onStop() {
    super.onStop();
    closeCamera();
}

@Override
protected void onPause() {
    Log.e(TAG, "onPause");
    //closeCamera();
    stopBackgroundThread();
    super.onPause();
}

private void closeCamera() {
    mCameraOpened = false;
    if (null != cameraDevice) {
        cameraDevice.close();
        cameraDevice = null;
    }
    if (null != imageReader) {
        imageReader.close();
        imageReader = null;
    }
}

protected void stopBackgroundThread() {
    mBackgroundThread.quitSafely();
    try {
        mBackgroundThread.join();
        mBackgroundThread = null;
        mBackgroundHandler = null;
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
}

protected void startBackgroundThread() {
    mBackgroundThread = new HandlerThread("Camera Background");
    mBackgroundThread.start();
    mBackgroundHandler = new Handler(mBackgroundThread.getLooper());
}

当我开始捕捉照片时，我得到了如下错误：

Fatal Exception: java.lang.IllegalArgumentException: Surface had no valid native Surface.
   at android.hardware.camera2.legacy.LegacyCameraDevice.nativeGetSurfaceId(LegacyCameraDevice.java)
   at android.hardware.camera2.legacy.LegacyCameraDevice.getSurfaceId(LegacyCameraDevice.java:658)
   at android.hardware.camera2.legacy.LegacyCameraDevice.containsSurfaceId(LegacyCameraDevice.java:678)
   at android.hardware.camera2.legacy.RequestThreadManager$2.onPictureTaken(RequestThreadManager.java:220)
   at android.hardware.Camera$EventHandler.handleMessage(Camera.java:1248)
   at android.os.Handler.dispatchMessage(Handler.java:111)
   at android.os.Looper.loop(Looper.java:207)
   at android.hardware.camera2.legacy.CameraDeviceUserShim$CameraLooper.run(CameraDeviceUserShim.java:136)
   at java.lang.Thread.run(Thread.java:818)

Answer 1

因为onStop（）是在onPause（）之后调用的。你试图阻止线程而不是关闭相机，但应该反之亦然。您应该在onPause（）中调用closeCamera（），而在onStop（）中调用stopBackgroundThread，如下所示：

@Override
protected void onPause() {
    Log.e(TAG, "onPause");
    closeCamera();
    super.onPause();
}

@Override
public void onStop() {
    stopBackgroundThread();
    super.onStop();
}

java.lang.IllegalArgumentException：Surface没有有效的原生Surface

1 个答案: