安卓PopupWindow是一個友善并且使用很常見的彈窗,下面詳細介紹下PopupWindow的使用。
先附上效果圖:
//圖截得不太好,大家湊合這用,重點是它的用法。
//關于popupWindow的實作關鍵代碼如下:
package com.lyk.activity;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.lyk.listview2.R;
import android.app.Activity;
import android.content.Intent;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.SimpleAdapter;
public class MainActivity extends Activity
{
private ListView listView;
private SimpleAdapter adapter;
private String[] from = {"text"};
private int[] to = {R.id.text};
private Map<String,Object> map;
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView)findViewById(R.id.listView);
adapter = new SimpleAdapter(this,getData(),R.layout.simplaadapter_listview,from,to);
listView.setAdapter(adapter);
listView.setOnItemClickListener(new onItemClickListeners());
}
/**
* 資料源
* @return
*/
private List<? extends Map<String, ?>> getData(){
List<Map<String,Object>> list = new ArrayList<Map<String,Object>>();
for(int i = 0;i<7;i++){
map = new HashMap<String, Object>();
map.put("text","item"+i);
list.add(map);
}
return list;
}
/**
* 條目事件
* @author Administrator
*
*/
final class onItemClickListeners implements OnItemClickListener{
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
System.out.println("id"+id);
System.out.println("position"+position);
System.out.println("view"+view.toString());//relative
System.out.println("parent"+parent.toString());//listview
System.out.println(parent.getChildAt(0).toString());
initPopup();
popup.showAsDropDown(view,0,5);//相對某個控件的位置(正左下方),偏移可選
}
}
private View parent;//popup相對view
private PopupWindow popup;
private View contentView;
public void initPopup(){
//初始動畫
// animation = AnimationUtils.loadAnimation(getApplicationContext(),R.anim.bottom);
//從指定的xml添加一個view
contentView = getLayoutInflater().inflate(R.layout.popup_window,null);
popup = new PopupWindow(contentView,ViewGroup.LayoutParams.MATCH_PARENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
popup.setFocusable(true);//設定焦點
popup.setBackgroundDrawable(new BitmapDrawable());//設定背景位圖
popup.setAnimationStyle(R.style.animation);//設定動畫
parent = this.findViewById(R.id.main);
// popup.showAtLocation(parent,Gravity.BOTTOM,0,0);//在父容器的位置
}
public boolean onCreateOptionsMenu(Menu menu)
{
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
//要實作popupWindow的動畫效果,還需下面的兩個平移動畫(底部):
//進入動畫:
<?xml version="1.0" encoding="utf-8"?>
<set
xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="false"
>
<!-- 平移動畫 -->
<translate
android:fromYDelta="100%p"
android:toYDelta="0"
android:duration="600"
/>
<!-- 透明度改變動畫 -->
<alpha
android:fromAlpha="0"
android:toAlpha="1.0"
android:duration="600"
/>
</set>
//隐藏PopupWindow動畫:
<?xml version="1.0" encoding="utf-8"?>
<set
xmlns:android="http://schemas.android.com/apk/res/android"
android:shareInterpolator="false"
>
<!-- 平移動畫 -->
<translate
android:fromYDelta="0"
android:toYDelta="100%p"
android:duration="1000"
/>
<!-- 透明度改變動畫 -->
<alpha
android:fromAlpha="1.0"
android:toAlpha="0"
android:duration="1000"
/>
</set>
//實作PopupWindow視窗就是這麼簡單,大家值得注意和研究的是PopupWindow的顯示位置
他有兩種API顯示:
1、popup.showAsDropDown(view,0,5);//相對某個控件的位置(正左下方),偏移可選
2、popup.showAtLocation(parent,Gravity.BOTTOM,0,0);//在父容器的位置,在底部(偏移可選)