我有一个CustomView工作在前Lollipop,现在我尝试在Lollipop设备上应用
android：elevation和android：translateZ但似乎不起作用.
- <com.example.CustomView
- android:id="@+id/myview"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:elevation="10dp">
- </com.example.CustomView>
我错过了什么？
解决方法
如
Defining Shadows and Clipping Views所述
您应该实现ViewOutlineProvider抽象类,View构建其Outline,用于阴影投射和剪切
矩形CustomView
- public class CustomView extends View {
- // ..
- @Override
- protected void onSizeChanged(int w,int h,int oldw,int oldh) {
- /// ..
- if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
- setOutlineProvider(new CustomOutline(w,h));
- }
- }
- @TargetApi(Build.VERSION_CODES.LOLLIPOP)
- private class CustomOutline extends ViewOutlineProvider {
- int width;
- int height;
- CustomOutline(int width,int height) {
- this.width = width;
- this.height = height;
- }
- @Override
- public void getOutline(View view,Outline outline) {
- outline.setRect(0,width,height);
- }
- }
- //...
- }
