PoopubWindow,能用showAsDropDown,就是用不了showAtLocation,（如图）

package com.example.zhuwen.model_popubwindow;



import android.app.Activity;

import android.os.Bundle;

import android.util.DisplayMetrics;

import android.widget.EditText;

import android.view.View;

import android.widget.PopupWindow;

import android.widget.TextView;

import android.view.View.OnClickListener;

import android.widget.Toast;



public class MainActivity extends Activity{



    private PopupWindow popupWindow;

    private View contentView;

    private TextView tx_pop;

    private TextView tx_test;

    private EditText ed_test;

    int width=0,height=0;



    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);



        tx_pop = (TextView)findViewById(R.id.tx_pop);

        tx_test = (TextView)findViewById(R.id.tx_test);

        ed_test = (EditText)findViewById(R.id.ed_test);



        //get the width and height of screen

        final DisplayMetrics metric = new DisplayMetrics();

        getWindowManager().getDefaultDisplay().getMetrics(metric);

        width = metric.widthPixels/2;

        height = metric.heightPixels/2;



        tx_test.setOnClickListener(new OnClickListener() {

            @Override

            public void onClick(View v) {

                Toast.makeText(getApplicationContext(),"Can Touch",

                        Toast.LENGTH_SHORT).show();

            }

        });



        tx_pop.setOnClickListener(new OnClickListener() {

            @Override

            public void onClick(View v) {

                get_pop();

            }

        });



    }



    public void get_pop() {



        contentView = getLayoutInflater().inflate(R.layout.pop_win, null);

        popupWindow = new PopupWindow(contentView, 300,

                200);

        popupWindow.setContentView(contentView);

        //.setBackgroundDrawable(getResources().getDrawable(R.drawable.search_label_click));

        //.setBackgroundColor(Color.parseColor("#F5F5DC"));

        //.setBackgroundColor(Color.GRAY);

        popupWindow.setBackgroundDrawable(getResources().getDrawable(R.drawable.test));

        //set "true" ,then you can enter something

        //set "true",a popwin will disappear when you touch the outside of the popwin

        popupWindow.setFocusable(true);

        //decided the location of a popwin

        popupWindow.showAtLocation(R.id.tx_pop,Gravity.LEFT, 0, 0);

        //the command to close a popwin

        //popupWindow.dismiss();



    }

}