主要通过PackageManager中的方法

代码：

public class InstallApps extends ListActivity {

HashMap map=new HashMap();

List packagelist=new ArrayList();

List systemApp=new ArrayList();

protected void onCreate(android.os.Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

PackageManager pm=getPackageManager();

//List mPackageinfo=  pm.getInstalledPackages(PackageManager.GET_PERMISSIONS);

Intent query=new Intent(Intent.ACTION_MAIN);

query.addCategory("android.intent.category.LAUNCHER");

List resolves= pm.queryIntentActivities(query, PackageManager.GET_ACTIVITIES);

for (int i = 0; i < resolves.size(); i++) {

ResolveInfo info= resolves.get(i);

/ /判断是否为系统级应用

if((info.activityInfo.applicationInfo.flags&ApplicationInfo.FLAG_SYSTEM)<=0){

/*安装的应用*/

String packagename=info.loadLabel(pm).toString();

String[] permission;

try {

permission = pm.getPackageInfo(info.activityInfo.packageName, PackageManager.GET_PERMISSIONS).requestedPermissions;//获取权限列表

packagelist.add(packagename);

map.put(packagename, permission);

} catch (NameNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

} else{

/*系统应用*/

String packagename=info.loadLabel(pm).toString();

String[] permission;

try {

permission = pm.getPackageInfo(info.activityInfo.packageName, PackageManager.GET_PERMISSIONS).requestedPermissions;//获取权限列表

systemApp.add(packagename);

map.put(packagename, permission);

} catch (NameNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

/*  判断是否属于系统应用

for (int i = 0; i < mPackageinfo.size(); i++) {

PackageInfo info=mPackageinfo.get(i);

if((info.applicationInfo.flags&ApplicationInfo.FLAG_SYSTEM)<=0){

String packagename=info.applicationInfo.loadLabel(pm).toString();

String[] permission= info.requestedPermissions;

packagelist.add(packagename);

map.put(packagename, permission);

} else{

String packagename=info.applicationInfo.loadLabel(pm).toString();

String[] permission= info.requestedPermissions;

systemApp.add(packagename);

map.put(packagename, permission);

}

}*/

packagelist.addAll(systemApp);

getListView().setAdapter(new ArrayAdapter(this, android.R.layout.simple_list_item_1, packagelist));

getListView().setOnItemClickListener(new OnItemClickListener() {

@Override

public void onItemClick(AdapterView> arg0, View arg1, int position, long arg3) {

// TODO Auto-generated method stub

String[]permission=map.get(packagelist.get(position));

StringBuilder sb=new StringBuilder();

for (int i = 0; i < permission.length; i++) {

sb.append("权限"+permission[i]+"\n");

}

Toast.makeText(getApplicationContext(), sb,Toast.LENGTH_LONG ).show();

}

});

};

}