我正在使用MediaProjection截取屏幕快照。这就是我所做的。我使用service创建了一个覆盖图标。单击覆盖图标时会截图。问题是,每当通过按回按钮或通过滑动手动杀死应用程序时,MediaProjection对象都会丢失。是否有办法维护MediaProjection并避免每次应用程序被终止时请求MediaProjection。我已经看到this,但我仍然无法做到。防止MediaProjection对象在杀死应用程序时丢失
在我Mainactivity的onclick包含startActivityForResult所得onActivityResult如下:
@Override
protected void onActivityResult(final int requestCode,final int resultCode,final Intent data)
{
if (requestCode == requestcode)
{
if (resultCode == RESULT_OK)
{
Singelton.setScreenshotPermission((Intent) data.clone());
Singelton.putmanger(mediaProjectionManager);
}else if (resultCode==RESULT_CANCELED) {
Singelton.setScreenshotPermission(null);
}
}
}
的Singelton类如下:
protected static void setScreenshotPermission(final Intent permissionIntent)
{
screenshotPermission = permissionIntent;
//screenshotPermission becomes null once the application is killed
}
public static MediaProjection getData()
{
return (mediaProjection);
}
public static void getScreenshotPermission()
{
if (screenshotPermission != null)
{
Log.d("screenshotpermisson", "screenshotPermission != null ");
if(mediaProjection!=null)
{
Log.d("mediaprojection", "mediaprojection != null ");
mediaProjection.stop();
mediaProjection = null;
}
mediaProjection = mediaProjectionManager.getMediaProjection(Activity.RESULT_OK, (Intent) screenshotPermission.clone());
}
else
{
//Here I need to request for media projection again without starting activity
}
}
我的图标覆盖服务类处理单击如下:
public void createDisplay()
{
if (mediaProjection == null)
{
Singelton.getScreenshotPermission();
mediaProjection = Singelton.getData();
}
mImageReader = ImageReader.newInstance(width, height, PixelFormat.RGBA_8888, 1);
vd = mediaProjection.createVirtualDisplay("screen-mirror", width, height, mDensity, DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR, mImageReader.getSurface(), null, null);
mImageReader.setOnImageAvailableListener(new ImageReader.OnImageAvailableListener(){..}
}
我是新来的Android和具有公顷第三次弄清楚这一点。任何帮助将不胜感激。
移动到后台的应用程序不一定会被杀死。它可能被杀死以释放内存,或者它可能安静地坐下,直到它没有被暂停。是否有理由不能在暂停时间发布媒体投影,并在简历中重新创建? – fadden