Android控件之PopupWindow弹出窗口

Android控件之PopupWindow弹出窗口:

package com.example.popupwindow;

import android.app.Activity;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.Gravity;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.PopupWindow;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void button1(View v) {
        View view=getLayoutInflater().inflate(R.layout.popup,null);

        //实例化创建PopupWindow()
        //参数(窗体的视图,宽,高)
        PopupWindow popup=new PopupWindow(view,ViewGroup.LayoutParams.MATCH_PARENT,ViewGroup.LayoutParams.WRAP_CONTENT);
        //背景颜色
        //设置弹出窗口的动画样式,这个动画样式是从旁边飞出来的
        popup.setAnimationStyle(android.R.style.Animation_Translucent);
        popup.setBackgroundDrawable(getResources().getDrawable(android.R.drawable.alert_dark_frame));
        //设置背景透明色
        popup.getBackground().setAlpha(100);
        //设置点击边上可以消失
        popup.setOutsideTouchable(true);
        //设置是否可以获取焦点
        popup.setFocusable(true);
        //设置是否可以触摸
        popup.setTouchable(true);
        //设置软件盘
        popup.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
        //开始显示show;
        popup.showAtLocation(v,Gravity.BOTTOM,0,0);

        //插播一段知识点(如何获取设备的尺寸)
                DisplayMetrics dm=new DisplayMetrics();
                getWindowManager().getDefaultDisplay().getMetrics(dm);
                int width=dm.widthPixels;
                int height=dm.heightPixels;



    }


}