Android获取所有安装的应用

这两天在看一个桌面应用的源码，主要就是焦点动画，其次就是对已安装的应用进行管理。

<span style="font-size:18px;"><span style="white-space:pre"> </span>PackageManager packageManager = getPackageManager();
final Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);//通过</span><span style="font-size: 18px; font-family: Arial, Helvetica, sans-serif;">Intent.ACTION_MAIN过滤出应用</span><span style="font-size:18px;">
mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
List<ResolveInfo> allApps = packageManager.queryIntentActivities(mainIntent, 0);

Collections.sort(allApps, new Comparator<ResolveInfo>() {
@Override
public int compare(ResolveInfo lhs, ResolveInfo rhs) {
return lhs.activityInfo.name.compareToIgnoreCase(rhs.activityInfo.name);//通过应用名排序
}
});

for (int i = 0; i < allApps.size(); i++) {
System.out.println(allApps.get(i).activityInfo.packageName);
}</span>

这个仅仅是获取已安装的，还需要对正在安装或卸载的程序进行监听
// 注册广播事件
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(Intent.ACTION_PACKAGE_ADDED);
intentFilter.addAction(Intent.ACTION_PACKAGE_REMOVED);
intentFilter.addAction(Intent.ACTION_PACKAGE_CHANGED);
intentFilter.addAction(Intent.ACTION_PACKAGE_FULLY_REMOVED);
intentFilter.addDataScheme("package");
registerReceiver(broadcastRec, intentFilter);// 注册监听函数

public final BroadcastReceiver broadcastRec = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(Intent.ACTION_PACKAGE_ADDED)
|| intent.getAction().equals(Intent.ACTION_PACKAGE_REMOVED)) {

synchronized (lock) {
// 从新获取应用列表，并刷新grid界面
mHandler.sendEmptyMessage(CMD_HANDLER_LOAD_DATA);
}
}
}

};