嗨,我有一个片段,其中有一个包含相机预览的 SurfaceView,我想在 surfaceview 上显示一个矩形形状。我尝试过在SurfaceView上放置ImageView,但SurfaceView将其隐藏。我怎么知道?
这就是它的样子 rn
我希望它看起来
这是我的片段:
public class Tab2Scan extends Fragment {
ConnectionDetector cd;
// QREader
private SurfaceView mySurfaceView;
private QREader qrEader;
Context thisContext;
View rootView;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.tab2scan, container, false);
getActivity().getWindow().setSoftInputMode(
WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
thisContext = getContext();
cd = new ConnectionDetector(thisContext);
mySurfaceView = (SurfaceView) rootView.findViewById(R.id.camera_view);
// Init QREader
// ------------
qrEader = new QREader.Builder(thisContext, mySurfaceView, new QRDataListener() {
@Override
public void onDetected(final String data) {
//qrEader.stop();
Intent intent = new Intent(getActivity(), ShowData.class);
intent.putExtra("variabile", data);
startActivity(intent);
getActivity().finish();
//Toast.makeText(thisContext, result.getContents(),Toast.LENGTH_LONG).show();
Log.d("QREader", "Value : " + data);
}
}).facing(QREader.BACK_CAM)
.enableAutofocus(true)
.height(mySurfaceView.getHeight())
.width(mySurfaceView.getWidth())
.build();
qrEader.start();
return rootView;
}
@Override
public void onResume() {
super.onResume();
// Init and Start with SurfaceView
// -------------------------------
qrEader.initAndStart(mySurfaceView);
qrEader.start();
}
@Override
public void onPause() {
super.onPause();
// Cleanup in onPause()
// --------------------
qrEader.releaseAndCleanup();
}
}
它是XML:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
xmlns:tools="http://schemas.android.com/tools"
android:orientation="vertical"
tools:context=".Main">
<SurfaceView
android:id="@+id/camera_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="100dp"
android:layout_marginBottom="100dp"
/>
</RelativeLayout>
谢谢!
只需在RelativeLayout
中添加一个ImageView
并使用传输父映像即可。
ImageView
必须位于标记SurfaceView
下方,并且必须与SurfaceView
的大小相同。