Android自定义PopupWindow小案例

/**
 * @param
 * @author ldm
 * @description 自定义PopupWindow
 * @time 2016/9/29 15:26
 */
public class CustomPopup extends PopupWindow {
  //上下文
  private Context mContext;
  // PopupWindow中控件点击事件回调接口
  private IPopuWindowListener mOnClickListener;
  //PopupWindow布局文件中的Button
  private Button alarm_pop_btn;
   /**
   * @description 构造方法
   * @author ldm
   * @time 2016/9/30 9:14
   * @param 
  */
  public CustomPopup(Context mContext, int width, int height, IPopuWindowListener listener) {
    super(mContext);
    this.mCOntext= mContext;
    this.mOnClickListener= listener;
    //获取布局文件
    View mCOntentView= LayoutInflater.from(mContext).inflate(R.layout.alarm_disopse_pop, null);
    //设置布局
    setContentView(mContentView);
    // 设置弹窗的宽度和高度
    setWidth(width);
    setHeight(height);
    //设置能否获取到焦点
    setFocusable(false);
    //设置PopupWindow进入和退出时的动画效果
    setAnimationStyle(R.style.popwindow_exit_anim_style);
    setTouchable(true); // 默认是true，设置为false，所有touch事件无响应，而被PopupWindow覆盖的Activity部分会响应点击
    // 设置弹窗外可点击,此时点击PopupWindow外的范围，Popupwindow不会消失
    setOutsideTouchable(false);
    //外部是否可以点击，设置Drawable原因可以参考：http://blog.csdn.net/harvic880925/article/details/49278705
    setBackgroundDrawable(new BitmapDrawable());
    // 设置弹窗的布局界面
    initUI();
  }

  /**
   * 初始化弹窗列表
   */
  private void initUI() {
  //获取到按钮
    alarm_pop_btn = (Button) getContentView().findViewById(R.id.alarm_pop_btn);
    //设置按钮点击事件
    alarm_pop_btn.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View view) {
        if (null != mOnClickListener) {
          mOnClickListener.dispose();
        }
      }
    });
  }

  /**
   * 显示弹窗列表界面
   */
  public void show(View view) {
    int[] location = new int[2];
    view.getLocationOnScreen(location);
    //Gravity.BOTTOM设置在view下方，还可以根据location来设置PopupWindowj显示的位置
    showAtLocation(view, Gravity.BOTTOM, 0, 0);
  }

  /**
   * @param
   * @author ldm
   * @description 点击事件回调处理接口
   * @time 2016/7/29 15:30
   */
  public interface IPopuWindowListener {
    void dispose();
  }
}

 //通过LayoutParams来设置PopupWindow的高度和宽度
  ViewGroup.LayoutParams lp = (ViewGroup.LayoutParams)mContentView.getLayoutParams();
   lp.widht=400;
   lp.height = 180;
  mContentView.setLayoutParams(lp);
  //但是直接这样写获取到的lp可能为空，我们在获取一个View的LayoutParams时，通常应该这样写：
  //在addOnGlobalLayoutListener监听中来获取View的LayoutParams  mContentView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
      @Override
      public void onGlobalLayout() {
        ViewGroup.LayoutParams lp = (ViewGroup.LayoutParams) mContentView.getLayoutParams();
        lp.height = 180;
        lp.width = 400;
        mContentView.setLayoutParams(lp);
      }
    });

private CustomPopup alarmPopup;
....
//初始化PopupWindow这里通过数据200来设置PopupWindow高度
alarmPopup=new CustomPopup(getActivity(), ViewGroup.LayoutParams.MATCH_PARENT, 200, this);//这里的this是指当前Activity实现了PopupWindow中IPopuWindowListener接口
//弹出PopupWindow
 @Override
  protected void widgetClick(View v) {
    super.widgetClick(v);
    switch (v.getId()) {
      case R.id.popup:
        alarmPopup.show(v);
        break;
    }
  }
  //处理PopupWindow中按钮点击回调
   @Override
  public void dispose() {
    //TODO sth 
    if (alarmPopup.isShowing()) {
        alarmPopup.dismiss();//关闭PopupWindow
      }
  }

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