Wie können mehrere Kameravorschauen in einer Aktivität angezeigt werden?

Question

setContentView(R.layout.activity_main); 
    mCamera = getCameraInstance(); 
    context = getApplicationContext(); 
    // Create our Preview view and set it as the content of our activity. 
    mPreview = new CameraPreview(this, mCamera); 
    FrameLayout preview1 = (FrameLayout)findViewById(R.id.camera_preview1); 
    FrameLayout preview2 = (FrameLayout)findViewById(R.id.camera_preview2); 
    //preview.setRotation(-90); 
    preview1.addView(mPreview); 
    preview2.addView(mPreview); 

This is what I have tried to do. In above snippet if I use just one FrameLayout , it works fine.Like this:

mPreview = new CameraPreview(this, mCamera); 
    FrameLayout preview = (FrameLayout) findViewById(R.id.camera_preview); 
    //preview.setRotation(-90); 
    preview1.addView(mPreview); 

Correspondingly, the layout looks like this:

<FrameLayout 
    android:id="@+id/camera_preview1" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:layout_weight="1"> 
</FrameLayout> 

<FrameLayout 
    android:id="@+id/camera_preview2" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:layout_weight="1"> 
</FrameLayout> 

<LinearLayout 
    android:id="@+id/speedBackgound" 
    android:layout_width="fill_parent" 
    android:layout_height="80dp" 
    android:layout_gravity="bottom" 
    android:orientation="horizontal" > 

    <ImageView 
     android:id="@+id/lastPic" 
     android:layout_width="70dp" 
     android:layout_height="70dp" 
     android:layout_gravity="center" 
     android:layout_marginLeft="10dp" 
     android:layout_weight="1" /> 

    <Button 
     android:layout_marginLeft="10dp" 
     android:id="@+id/button_capture" 
     android:layout_width="80dp" 
     android:layout_height="80dp" 
     android:onClick="takePhoto" 
     android:layout_gravity="right"/> 
</LinearLayout> 

In case of single frame, it works fine. When two frames and previews are added I get a runtime error:

The specified child already has a parent. You must call removeView() on the child's parent first.

Irgendwelche Ideen, um das Problem zu lösen?

Answer 1

Sie müssen mehrere SurfaceTexture erstellen und sie in der Methode createCaptureSession von Camera Objekt übergeben.