PopupWindow泡泡效果

在使用手機的時候看到這個效果，上網查了一下，是使用了PopupWindow實現的

在此記錄一下：

主要代碼：

</p><p>import java.util.ArrayList;<br />import java.util.HashMap;<br />import java.util.List;<br />import java.util.Map;</p><p>import android.app.ListActivity;<br />import android.content.Context;<br />import android.os.Bundle;<br />import android.view.Gravity;<br />import android.view.LayoutInflater;<br />import android.view.View;<br />import android.view.WindowManager;<br />import android.widget.AdapterView;<br />import android.widget.AdapterView.OnItemClickListener;<br />import android.widget.ListView;<br />import android.widget.PopupWindow;<br />import android.widget.SimpleAdapter;</p><p>public class PopActivity extends ListActivity implements OnItemClickListener{<br />private List<Map<String,Object>> list ;<br />ListView listview;<br />PopupWindow pw = null;<br />//頭像的Id數組<br />int head[] = {R.drawable.image1,R.drawable.image2,R.drawable.image3,<br />R.drawable.image4,R.drawable.image5};</p><p> /** Called when the activity is first created. */<br /> @Override<br /> public void onCreate(Bundle savedInstanceState) {<br /> super.onCreate(savedInstanceState);<br /> listview = getListView();<br /> initData();//產生幾條記錄<br /> SimpleAdapter adapter =new SimpleAdapter(this, list,R.layout.people ,new String []{"head","name","num"} , new int []{R.id.head,R.id.text,R.id.num});<br /> setListAdapter(adapter);<br /> listview.setOnItemClickListener(this);<br /> }<br /> public void initData(){<br /> list = new ArrayList<Map<String,Object>>();<br /> for(int i = 0;i<5;i++){<br /> Map<String ,Object> map = new HashMap<String, Object>();<br /> map.put("head", head[i]);<br /> map.put("name","第"+i+"位使用者");<br /> map.put("num","12445533"+i);<br /> list.add(map);<br /> }<br /> }<br />@Override<br />public void onItemClick(AdapterView<?> arg0, View v, int position, long id) {<br />// TODO Auto-generated method stub<br />LayoutInflater factory = LayoutInflater.from(PopActivity.this);<br />final View textEntryView = factory.inflate(R.layout.paopao_alert_dialog, null);<br />//擷取WindowManager對象<br />WindowManager wm = (WindowManager)getSystemService(Context.WINDOW_SERVICE);<br />int envWidth = wm.getDefaultDisplay().getWidth();<br />int envHeight = wm.getDefaultDisplay().getHeight();<br />if(pw == null)<br />{<br />pw = new PopupWindow(textEntryView);<br />pw.showAtLocation(v, Gravity.LEFT,0,0); //在父視圖的左上方顯示<br />}else if(!pw.isShowing()){<br />pw = new PopupWindow(textEntryView);<br />pw.showAtLocation(v, Gravity.LEFT,0,0);<br />}<br />int pwH = 70;<br />int pwW = 166;<br />int y = -envHeight/2+v.getTop() + pwH;<br />pw.update(0,y,pwW,pwH); //更新位置。<br />textEntryView.findViewById(R.id.phone).setOnClickListener(new View.OnClickListener() {<br />public void onClick(View v) {<br />// TODO Auto-generated method stub<br />pw.dismiss();<br />}</p><p>});<br />}<br />}主要就是OnItemClick()方法中的實現，擷取WindowManager ，得到一個PopupWindow對象，然後顯示出來，當然在實際中要去響應PopupWindow中的按鈕事件了。