5
我已经实现了从后台线程拍照的服务,但照片永远不会在我的任何设备上拍摄......这里是代码(下面的日志记录输出) :Android相机无法拍摄来自后台服务的照片
public class PhotoCaptureService extends Service {
private static final String TAG = "PhotoCaptureService";
@Override
public void onStart(Intent intent, int startId) {
super.onStart(intent, startId);
Log.d(TAG, "Starting the PhotoCaptureService");
takePhoto();
}
private void takePhoto() {
Log.d(TAG, "Preparing to take photo");
Camera camera = null;
try {
camera = Camera.open();
} catch (RuntimeException e) {
Log.e(TAG, "Camera not available", e);
return;
}
if (null == camera) {
Log.e(TAG, "Could not get camera instance");
return;
}
Log.d(TAG, "Got the camera, creating the dummy surface texture");
SurfaceTexture dummySurfaceTexture = new SurfaceTexture(0);
try {
camera.setPreviewTexture(dummySurfaceTexture);
} catch (Exception e) {
Log.e(TAG, "Could not set the surface preview texture", e);
}
Log.d(TAG, "Preview texture set, starting preview");
camera.startPreview();
Log.d(TAG, "Preview started");
camera.takePicture(null, null, new Camera.PictureCallback() {
@Override
public void onPictureTaken(byte[] data, Camera camera) {
Log.d(TAG, "Photo taken, stopping preview");
camera.stopPreview();
Log.d(TAG, "Preview stopped, releasing camera");
camera.release();
Log.d(TAG, "Camera released");
}
});
}
输出记录:
D/PhotoCaptureService﹕ Starting the PhotoCaptureService
D/PhotoCaptureService﹕ Preparing to take photo
D/PhotoCaptureService﹕ Got the camera, creating the dummy surface texture
D/PhotoCaptureService﹕ Preview texture set, starting preview
D/PhotoCaptureService﹕ Preview started
在这一点上没有什么事情发生,该onPictureTaken方法不会被调用,也没有抛出错误或异常。有谁知道为什么会发生这种情况?我已经看过StackOverflow上的每一个摄像头教程,并没有任何工作。
1.服务不在后台线程中运行。要使用所需的后台服务,您必须扩展IntentService。 2.请向我们提供来自异常的堆栈跟踪。 –
这是他可能会得到的那种堆栈跟踪,因为我有同样的问题 – Zeeshan
你有没有得到它的工作? – VickyS