正文
PopupWindow 实现 查看所有手机应用弹出框
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public class MainActivity extends Activity implements OnItemLongClickListener, OnClickListener {
private ListView lv_main;
private List<AppInfo> data;
private AppAdapter adapter;
private PopupWindow pw;
private View pwView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//初始化成员变量
lv_main = (ListView) findViewById(R.id.lv_main);
data = getAllAppInfos();
adapter = new AppAdapter();
//显示列表
lv_main.setAdapter(adapter);
//给ListView设置item的点击监听
lv_main.setOnItemClickListener(new OnItemClickListener() {
/**
* parent : ListView
* view : 当前行的item视图对象
* position : 当前行的下标
*/
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
//提示当前行的应用名称
String appName = data.get(position).getAppName();
//提示
//Toast.makeText(MainActivity.this, appName, 0).show();
if(pw==null) {
pwView = View.inflate(MainActivity.this, R.layout.pw_layout, null);
//得到子view设置点击监听
pwView.findViewById(R.id.ll_pw_uninstall).setOnClickListener(MainActivity.this);
pwView.findViewById(R.id.ll_pw_run).setOnClickListener(MainActivity.this);
pwView.findViewById(R.id.ll_pw_share).setOnClickListener(MainActivity.this);
pw = new PopupWindow(pwView, view.getWidth()-80, view.getHeight());
pw.setBackgroundDrawable(new BitmapDrawable());//必须指定一个背景图片，随便一个即可，不然以下设置的动画不显示
}
//如果正在显示, 移除
if(pw.isShowing()) {
pw.dismiss();//只是不显示了, 但对象仍然在内存中
}
//(再)显示
pw.showAsDropDown(view, 40, -view.getHeight());
//缩放动画
ScaleAnimation animation = new ScaleAnimation(0, 1, 0, 1);
animation.setDuration(1000);
//启动动画
pwView.startAnimation(animation);
}
});
//给LitView设置Item的长按监听
lv_main.setOnItemLongClickListener(this);
//设置listView的滚动监听
lv_main.setOnScrollListener(new OnScrollListener() {
/*
* SCROLL_STATE_IDLE : 空闲(不动)
* SCROLL_STATE_TOUCH_SCROLL : 跟着手指滚动
* SCROLL_STATE_FLING : 快速滚动
*/
//当listView的滚动状态发生改变时调用
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
Log.e("TAG", "onScrollStateChanged()..."+scrollState);
if(scrollState==OnScrollListener.SCROLL_STATE_TOUCH_SCROLL) {
//移除正在显示的pw
if(pw!=null && pw.isShowing()) {
pw.dismiss();
}
}
}
//当listView正在滚动时调用(产生move时不断调用)
@Override
public void onScroll(AbsListView view, int firstVisibleItemPosition,
int visibleItemCount, int totalItemCount) {
Log.e("TAG", "onScroll()...");
}
});
}
class AppAdapter extends BaseAdapter {
@Override
public int getCount() {
return data.size();
}
@Override
public Object getItem(int position) {
return data.get(position);
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
//返回带数据当前行的Item视图对象
@Override
public View getView(int position, View convertView, ViewGroup parent) {
//1. 如果convertView是null, 加载item的布局文件
if(convertView==null) {
Log.e("TAG", "getView() load layout");
convertView = View.inflate(MainActivity.this, R.layout.item_main, null);
}
//2. 得到当前行数据对象
AppInfo appInfo = data.get(position);
//3. 得到当前行需要更新的子View对象
ImageView imageView = (ImageView) convertView.findViewById(R.id.iv_item_icon);
TextView textView = (TextView) convertView.findViewById(R.id.tv_item_name);
//4. 给视图设置数据
imageView.setImageDrawable(appInfo.getIcon());
textView.setText(appInfo.getAppName());
//返回convertView
return convertView;
}
}
/*
* 得到手机中所有应用信息的列表
* AppInfo
* Drawable icon 图片对象
* String appName
* String packageName
*/
protected List<AppInfo> getAllAppInfos() {
List<AppInfo> list = new ArrayList<AppInfo>();
// 得到应用的packgeManager
PackageManager packageManager = getPackageManager();
// 创建一个主界面的intent
Intent intent = new Intent();
intent.setAction(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_LAUNCHER);
// 得到包含应用信息的列表
List<ResolveInfo> ResolveInfos = packageManager.queryIntentActivities(
intent, 0);
// 遍历
for (ResolveInfo ri : ResolveInfos) {
// 得到包名
String packageName = ri.activityInfo.packageName;
// 得到图标
Drawable icon = ri.loadIcon(packageManager);
// 得到应用名称
String appName = ri.loadLabel(packageManager).toString();
// 封装应用信息对象
AppInfo appInfo = new AppInfo(icon, appName, packageName);
// 添加到list
list.add(appInfo);
}
return list;
}
@Override
public boolean onItemLongClick(AdapterView<?> parent, View view,
int position, long id) {
//删除当前行
//删除当前行的数据
data.remove(position);
//更新列表
//lv_main.setAdapter(adapter);//显示列表, 不会使用缓存的item的视图对象
adapter.notifyDataSetChanged();//通知更新列表, 使用所有缓存的item的视图对象
return true;
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.ll_pw_uninstall:
pw.dismiss();
Toast.makeText(this, "卸载", 0).show();
break;
case R.id.ll_pw_run:
pw.dismiss();
Toast.makeText(this, "运行", 0).show();
break;
case R.id.ll_pw_share:
pw.dismiss();
Toast.makeText(this, "分享", 0).show();
break;
default:
break;
}
}
}
item_bg_selector
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
<item android:state_pressed="true">
<shape>
<solid android:color="#00ffff"></solid>
</shape>
</item>
</selector>
pw_layout
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="80dp"
android:background="@drawable/local_popup_bg"
android:orientation="horizontal"
android:paddingLeft="20dp" >
<LinearLayout
android:id="@+id/ll_pw_uninstall"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:orientation="vertical"
android:background="@drawable/item_bg_selector" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/img1" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="卸载"
android:textSize="16sp" />
</LinearLayout>
<View
android:layout_width="1dp"
android:layout_height="fill_parent"
android:background="#00ff00" />
<LinearLayout
android:id="@+id/ll_pw_run"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:orientation="vertical"
android:background="@drawable/item_bg_selector" >
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/img2" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="运行"
android:textSize="16sp" />
</LinearLayout>
<View
android:layout_width="1dp"
android:layout_height="fill_parent"
android:background="#00ff00" />
<LinearLayout
android:id="@+id/ll_pw_share"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center"
android:orientation="vertical"
android:background="@drawable/item_bg_selector">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/img3" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="分享"
android:textSize="16sp" />
</LinearLayout>
</LinearLayout>
