Permissions used by other app in android - permissions

Question

I want to add a feature in my Android app that can check permissions used by other installed apps. For Example: - My app check other already installed apps permissions that which they are used?
StringBuffer appNameAndPermissions=new StringBuffer();
PackageManager pm = getPackageManager();
List <ApplicationInfo>packages = pm.getInstalledApplications(PackageManager.GET_META_DATA);
{
for (ApplicationInfo applicationInfo : packages) {
Log.d("test", "App: " + applicationInfo.name + " Package: " + applicationInfo.packageName);
try {
PackageInfo packageInfo = pm.getPackageInfo(applicationInfo.packageName, PackageManager.GET_PERMISSIONS);
appNameAndPermissions.append(packageInfo.packageName+"*:\n");
// Get Permissions
String[] requestedPermissions = packageInfo.requestedPermissions;
if(requestedPermissions != null) {
for (int i = 0; i < requestedPermissions.length; i++) {
Log.d("test", requestedPermissions[i]);
appNameAndPermissions.append(requestedPermissions[i]+"\n");
}
appNameAndPermissions.append("\n");
}
} catch (NameNotFoundException e) {
e.printStackTrace();
}}}
}
This is working code, it gives complete list of all permissions used by all apps.
But my question is how to know particularly which app using which permission ?
Please help me & give me some idea about this.

Answer 1

This is Working code:
PackageManager mPm = getPackageManager();
List <PackageInfo> appList=mPm.getInstalledPackages(PackageManager.GET_PERMISSIONS|PackageManager.GET_RECEIVERS|
PackageManager.GET_SERVICES|PackageManager.GET_PROVIDERS);
for (PackageInfo pi : appList) {
System.out.println("Process Name: "+pi);
// Do not add System Packages
if ((pi.requestedPermissions == null || pi.packageName.equals("android")) ||
(pi.applicationInfo != null && (pi.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0))
continue;
for (String permission : pi.requestedPermissions) {
//Map<String, String> curChildMap = new HashMap<String, String>();
//System.out.println("############ "+permission);
try {
PermissionInfo pinfo = mPm.getPermissionInfo(permission, PackageManager.GET_META_DATA);
CharSequence label = pinfo.loadLabel(mPm);
CharSequence desc = pinfo.loadDescription(mPm);
System.out.println("$$$$$ "+label+"!!!!!! "+desc);
} catch (NameNotFoundException e) {
Log.i(TAG, "Ignoring unknown permission " + permission);
continue;
}
}