可能重複:
how to make surfaceview transparent製作定製的Android SurfaceView透明
我試圖做一個自定義的表面觀半透明狀。目前該活動是透明的,所以我可以在它下面看到活動,但只要添加20dp * 20dp(稱爲ControlsOverlayView)的自定義視圖,它就會在屏幕上顯示爲黑色方塊。我看過這個帖子How to make a ListView transparent in Android?,並試圖設置背景顏色,cachehint和alpha的視圖無濟於事。
透明活性容納視圖是ControlsOverlayActivity.java:
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();
}
}
}
的佈局的test.xml包含樣本的TextView和我的自定義ControlsOverlayView是:
<?xml version="1.0" encoding="utf-8"?>
<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">
<TextView android:id="@+id/test_text"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<wp.ui.ControlsOverlayView
android:layout_width="20dp"
android:layout_height="20dp"
android:background="#00000000"
android:cacheColorHint="#00000000"
android:alpha="0"
/>
</FrameLayout>
和視圖:
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
}
}
也在我的清單中我有:
<activity android:name=".ui.ControlsOverlayActivity" android:theme="@style/Theme.Transparent">
</activity>
和Theme.Transparent定義爲:
<style name="Theme.Transparent" parent="android:Theme">
<item name="android:windowIsTranslucent">true</item>
<item name="android:windowBackground">@color/transparent</item>
<item name="android:windowContentOverlay">@null</item>
<item name="android:windowNoTitle">true</item>
<item name="android:backgroundDimEnabled">false</item>
</style>
再次它只是自訂認爲`噸得到是透明的。有任何想法嗎?
哇,不知道我怎麼錯過了這個職位。非常感謝。 – odiggity