BannerViewPager/app/src/main/java/com/example/zhpan/banner/view/RoundViewOutlineProvider.java

package com.example.zhpan.banner.view;

import android.annotation.TargetApi;
import android.graphics.Outline;
import android.graphics.Rect;
import android.os.Build;
import android.view.View;
import android.view.ViewOutlineProvider;

/**
 * <pre>
 *   Created by zhangpan on 2018/12/26.
 *   Description:圆角效果
 * </pre>
 */

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public class RoundViewOutlineProvider extends ViewOutlineProvider {
  /**
   * 圆角弧度
   */
  private final float mRadius;

  public RoundViewOutlineProvider(float radius) {
    this.mRadius = radius;
  }

  @Override
  public void getOutline(View view, Outline outline) {
    // 绘制区域
    Rect selfRect = new Rect(0, 0, view.getWidth(), view.getHeight());
    outline.setRoundRect(selfRect, mRadius);
  }
}