Android popupWindow弹出窗体实现方法分析

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="match_parent"
  android:layout_height="80dip"
  android:background="@drawable/popup_yellow_window_bg"
  android:orientation="horizontal" >
  <TextView
      android:id="@+id/popupwindow_app_uninstall_text"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_gravity="center_horizontal"
      android:layout_marginBottom="5dip"
      android:layout_marginTop="5dip"
      android:drawableTop="@drawable/kn_malware_scan_deep_click"
      android:text="卸 载"/>
</LinearLayout>

View contentView = View.inflate(getApplicationContext(), R.layout.popup_window, null);
LinearLayout ll_uninstall = (LinearLayout) contentView.findViewById(R.id.ll_uninstall);
//设置popupwindow内布局组件的监听（与其他组件相似）
MyOnClickListener l = new MyOnClickListener(position);
ll_uninstall.setOnClickListener(l);
PopupWindow mPopupWindow = new PopupWindow(contentView, ViewGroup.LayoutParams.WRAP_CONTENT, 70);
int[] arrayOfInt = new int[2];
view.getLocationInWindow(arrayOfInt);
int x = arrayOfInt[0] + 60;
int y = arrayOfInt[1];
//1 指定popupwindow的背景  2 popupwindow能够获得焦点
mPopupWindow.setBackgroundDrawable(new BitmapDrawable());
mPopupWindow.setFocusable(true);
mPopupWindow.showAtLocation(view, Gravity.LEFT|Gravity.TOP, x, y);
//在合适位置取消popupwindow显示
mPopupWindow.dismiss();