Android:以编程方式在自定义 View 中设置 match_parent

Question

我实现了一个可以绘画的自定义 View 。我想将它设置为 MATCH_PARENT，以便它独立于屏幕方向填充屏幕。当我将方向更改为横向时，它仅填充 50% 的宽度。

我改变了 onMeasure() 但没有效果:

public class DrawScreen extends View{

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(widthMeasureSpec, heightMeasureSpec);   
    if(context.getResources().getConfiguration().orientation==Configuration.ORIENTATION_LANDSCAPE){
        setMeasuredDimension(screenWidth, screenHeight);
    }else{
        setMeasuredDimension(screenHeight, screenWidth);
    }

}
}


public class MyService extends Service{

...
windowManager.addView(toolbox, params);
}

Answer 1

您可以尝试以下方法:

final DrawScreen view = new DrawScreen(...);
final LayoutParams lp = new LayoutParams(MATCH_PARENT, MATCH_PARENT);
view.setLayoutParams(lp);