我正在开发一个需要扫描QR码并点击图片的应用程序,但有时会发生相机应用程序崩溃并且说
Android相机已经停止工作并且设备需要重新启动才能正常运行的情况.
我希望能够从我的活动本身释放相机,以避免它在以后的任何情况下崩溃.
需要帮助！
扫描代码：
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
try{
Intent intent = new Intent("com.google.zxing.client.android.SCAN");
intent.putExtra("SCAN_MODE","QR_CODE_MODE");
startActivityForResult(intent,0);
}
catch(Exception e)
{
// ERROR
}
}
public void onActivityResult(int requestCode,int resultCode,Intent intent)
{
if (requestCode == 0)
{
if (resultCode == RESULT_OK)
{
String contents = intent.getStringExtra("SCAN_RESULT");
showPass(contents);
}
else if (resultCode == RESULT_CANCELED)
{
showFail();
}
}
}
public void takephoto(View v)
{
Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(cameraIntent,CAMERA_REQUEST);
}
protected void onActivityResult(int requestCode,Intent data)
{
if (requestCode == CAMERA_REQUEST)
{
Bitmap photo = (Bitmap) data.getExtras().get("data");
// some action.
}
}
解决方法
将以下代码放在活动的onDestroy方法中：
protected void onDestroy(){
if(camera!=null){
camera.stopPreview();
camera.setPreviewCallback(null);
camera.release();
camera = null;
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
if(camera!=null){
camera.stopPreview();
camera.setPreviewCallback(null);
camera.release();
camera = null;
}
}
