如何訪問自定義視圖的android：layout_width和android：layout_height參數？

Question

如何訪問您的自定義視圖的android：layout_width和android：layout_height值？

示例XML：

<com.example.CustomButton 
    android:id="@+id/btn" 
    android:layout_width="150dp" 
    android:layout_height="70dp" /> 

在的CustomButton：

@Override 
protected void onMeasure(int widthSpec, int heightSpec) { 
    int measuredWidth = MeasureSpec.getSize(widthSpec); 
    int measuredHeight = MeasureSpec.getSize(heightSpec); 
    // How can we measure based on android:layout_width, android:layout_height? 
    // Currently this implementation measures off the parent's values 
    setMeasuredDimension(measuredWidth, measuredHeight); 
} 

Answer 1

你必須得到視圖的佈局PARAMS：

CustomButton.LayoutParams viewParams = yourView.getLayoutParams(); 

然後你就可以訪問或修改寬度或查看：

viewParams.height; 
viewParams.width; 

希望它有幫助！