Android(安卓)Popupwindow 显示ListView

package com.hyc.popupwindowdemo;import java.util.ArrayList;import java.util.List;import android.app.Activity;import android.graphics.drawable.ColorDrawable;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup.LayoutParams;import android.widget.ArrayAdapter;import android.widget.ListView;import android.widget.PopupWindow;import android.widget.TextView;public class MainActivity extends Activity implements OnClickListener {private TextView tvHello = null;private PopupWindow mPopupWindow = null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);tvHello = (TextView) findViewById(R.id.tv_hello);tvHello.setOnClickListener(this);}@Overridepublic void onClick(View v) {// TextView tv = new TextView(this);// tv.setWidth(LayoutParams.WRAP_CONTENT);// tv.setHeight(LayoutParams.WRAP_CONTENT);// tv.setText("ok");ListView lv = new ListView(this);lv.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT));List<String> strList = new ArrayList<String>();strList.add("qwe");strList.add("weq");strList.add("wer");strList.add("rew");strList.add("fds");strList.add("tre");ArrayAdapter<String> strAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, strList);lv.setAdapter(strAdapter);mPopupWindow = new PopupWindow(lv, 200, 400);mPopupWindow.setFocusable(true);mPopupWindow.setOutsideTouchable(true);mPopupWindow.update();mPopupWindow.setBackgroundDrawable(new ColorDrawable(0));mPopupWindow.showAsDropDown(tvHello);}}
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