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POMaking Custom Android SurfaceView Transparent
 

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    <blockquote> <p><strong>Possible Duplicate:</strong><br> <a href="https://stackoverflow.com/questions/5391089/how-to-make-surfaceview-transparent">how to make surfaceview transparent</a> </p> </blockquote> <p>I am trying to make a custom surface view semi translucent. Currently the activity is transparent so I can see the activity before it underneath, but as soon as I add my custom view that is 20dp * 20 dp (called ControlsOverlayView) it shows up as a black square on the screen. I have seen this post <a href="https://stackoverflow.com/questions/1377336/how-to-make-a-listview-transparent-in-android">How to make a ListView transparent in Android?</a> and have tried setting background color, cachehint and alpha of the view to no avail. </p> <p>The transparent activity housing the view is ControlsOverlayActivity.java: </p> <pre><code>public class ControlsOverlayActivity extends Activity { private ControlsOverlayView overlay; @Override protected void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); setContentView(R.layout.test); TextView textView = (TextView) findViewById(R.id.test_text); try { textView.setText("test"); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } } </code></pre> <p>The test.xml layout including a sample TextView and my custom ControlsOverlayView is:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/test" android:orientation="vertical" android:layout_width="match_parent" android:layout_height="match_parent"&gt; &lt;TextView android:id="@+id/test_text" android:layout_width="match_parent" android:layout_height="match_parent"/&gt; &lt;wp.ui.ControlsOverlayView android:layout_width="20dp" android:layout_height="20dp" android:background="#00000000" android:cacheColorHint="#00000000" android:alpha="0" /&gt; &lt;/FrameLayout&gt; </code></pre> <p>and view:</p> <pre><code>public class ControlsOverlayView extends SurfaceView implements Runnable, Callback{ public ControlsOverlayView(Context context, AttributeSet attrs) { super(context, attrs); // make sure we get key events setFocusable(true); setFocusableInTouchMode(true); requestFocus(); // register our interest in hearing about changes to our surface getHolder().addCallback(this); } @Override public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) { //resize(getWidth(), getHeight()); //paintControls(); } @Override public void surfaceDestroyed(SurfaceHolder arg0) { // TODO Auto-generated method stub } @Override public void run() { // TODO Auto-generated method stub } @Override public void surfaceCreated(SurfaceHolder holder) { // TODO Auto-generated method stub } } </code></pre> <p>also in my manifest i have:</p> <pre><code>&lt;activity android:name=".ui.ControlsOverlayActivity" android:theme="@style/Theme.Transparent"&gt; &lt;/activity&gt; </code></pre> <p>and the Theme.Transparent is defined as:</p> <pre><code>&lt;style name="Theme.Transparent" parent="android:Theme"&gt; &lt;item name="android:windowIsTranslucent"&gt;true&lt;/item&gt; &lt;item name="android:windowBackground"&gt;@color/transparent&lt;/item&gt; &lt;item name="android:windowContentOverlay"&gt;@null&lt;/item&gt; &lt;item name="android:windowNoTitle"&gt;true&lt;/item&gt; &lt;item name="android:backgroundDimEnabled"&gt;false&lt;/item&gt; &lt;/style&gt; </code></pre> <p>Again it is just the custom view that can`t get to be transparent. Any ideas?</p>
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