我正在使用相机闪光灯的手电筒应用程序。它似乎工作正常,但有时会调用camera.release()导致大约一分钟左右的挂起。我已经包含下面的代码。我看了一堆例子,我没有看到任何可能导致这种事情的东西。有任何想法吗?app挂在camera.release()
//latest
public void setOn(boolean on, Context context) {
if (lock) {
Log.i(TAG, "lock: true");
return;
}
if (on) {
if (mCamera == null) {
mCamera = Camera.open();
}
Parameters params = mCamera.getParameters();
params.setFlashMode(MODE_TORCH);
mCamera.setParameters(params);
mCamera.startPreview();
} else {
if (mCamera != null) {
try {
Parameters params = mCamera.getParameters();
params.setFlashMode(MODE_OFF);
mCamera.setParameters(params);
} finally {
new Thread(new Runnable() {
public void run() {
Log.i(TAG, "new Thread - start");
lock = true;
mCamera.setPreviewCallback(null);
mCamera.stopPreview();
mCamera.release();
mCamera = null;
lock = false;
Log.i(TAG, "new Thread - end");
}
}).start();
}
}
}
}
//original
public void setOn(boolean on, Context context) {
Camera camera = mCamera;
if (on) {
if (camera == null) {
mCamera = camera = Camera.open();
}
Parameters params = camera.getParameters();
params.setFlashMode(MODE_TORCH);
camera.setParameters(params);
camera.startPreview();
} else {
if (camera != null) {
try {
Parameters params = camera.getParameters();
params.setFlashMode(MODE_OFF);
camera.setParameters(params);
} finally {
camera.stopPreview();
camera.release();
mCamera = camera = null;
}
}
}
}
在该设备会发生这种情况?我们在Android 4.3,4.0和5.0(4.2没有这个问题)的Nexus 10上有完全相同的问题 – DoDo 2014-11-15 21:22:18