PopupWindow

[android]代码库

package com.example.popupwindow;

import android.os.Bundle;
import android.app.Activity;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.view.Gravity;
import android.view.Menu;
import android.view.View;
import android.widget.PopupWindow;
import android.widget.RelativeLayout;

public class MainActivity extends Activity {

    private RelativeLayout r;
    PopupWindow p=null;
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        r=(RelativeLayout) findViewById(R.id.r);       
        //将xml文件转为view视图
        View view=View.inflate(MainActivity.this,R.layout.popupwindow,null);
        //创建popupwindow对象
        p=new PopupWindow(view, 500, 700, true);
        //设置是否支持区域外点击消失 
        p.setOutsideTouchable(true);
        //必须在代码中设置背景颜色（xml不管用），没有背景颜色
        //即使点击外区域也不会生效
        p.setBackgroundDrawable(new ColorDrawable(Color.GREEN));               
    }
    public void tiao(View v){
    	//判断是否点击按钮出现
    	if(p.isShowing()){
    		//出现则消失
			p.dismiss();
		}else{
			//没有则出现
			p.showAtLocation(r, Gravity.BOTTOM|Gravity.LEFT, 0, 0);			
		}
       
    }        
}