Develop Reference

How to check displaying mock location in android? [without using location]

I need to check whether any fake app using location in developer settings. So that I need to make user to change it to developer setting.
But I need to use without using location. I tried this method but this displays not enabled toast message eventhough I enabled the fake app location.
public static boolean isMockLocationEnabled(Context context)
{
boolean isMockLocation = false;
try {
//if marshmallow
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
AppOpsManager opsManager = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
isMockLocation = (opsManager.checkOp(AppOpsManager.OPSTR_MOCK_LOCATION, android.os.Process.myUid(), BuildConfig.APPLICATION_ID)== AppOpsManager.MODE_ALLOWED);
} else {
// in marshmallow this will always return true
isMockLocation = !android.provider.Settings.Secure.getString(context.getContentResolver(), "mock_location").equals("0");
}
} catch (Exception e) {
return isMockLocation;
}
return isMockLocation;
}
MainActivity:
#Override
protected void onStart() {
super.onStart();
if (AppUtils.isMockLocationEnabled(this)) {
Log.e("Location..............", "enabled");
} else {
Log.e("Location..............", "not enabled"); //it always goes here in 8.0
}
}
So without location, how to pass? Because I just need to check whether fake location is using or not?
//location.isFromMockProvider(); // without location how to use?
So any other solution?

You can check whether the Mock options is ON:
if (Settings.Secure.getString(context.getContentResolver(),
Settings.Secure.ALLOW_MOCK_LOCATION).equals("0"))
return false;
else
return true;
Or you can detect if there is an application which is using Mock:
boolean isExisted = false;
PackageManager pm = getPackageManager();
List<ApplicationInfo> packages = pm.getInstalledApplications(PackageManager.GET_META_DATA);
for (ApplicationInfo applicationInfo : packages) {
try {
PackageInfo packageInfo = pm.getPackageInfo(applicationInfo.packageName,
PackageManager.GET_PERMISSIONS);
String[] requestedPermissions = packageInfo.requestedPermissions;
if (requestedPermissions != null) {
for (int i = 0; i < requestedPermissions.length; i++) {
if (requestedPermissions[i]
.equals("android.permission.ACCESS_MOCK_LOCATION")
&& !applicationInfo.packageName.equals(context.getPackageName())) {
isExisted = true;
break;
}
}
}
} catch (NameNotFoundException e) {
Log.e("Got exception " , e.getMessage());
}
}

How To Delete Cache Using Accessibility Service in Android?

I'm working on cache cleaner app, after doing research on google I found that Android system has moved "CLEAR_APP_CACHE" permission to "signature, privileged" state. So I'm unable clear cache with freeStorageAndNotify method.
Apps on google playstore like CCleaner, Power Clean etc.. are using Accessibility Service To Delete Cache.
I have also created basic accessibility service for my app, but don't know how to delete cache of apps

You can get a list of installed apps and delete cache like:
public static void clearALLCache()
{
List<PackageInfo> packList = getPackageManager().getInstalledPackages(0);
for (int i=0; i < packList.size(); i++)
{
PackageInfo packInfo = packList.get(i);
if ( (packInfo.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) == 0)
{
String appName = packInfo.applicationInfo.loadLabel(getPackageManager()).toString();
try {
// clearing app data
// Runtime runtime = Runtime.getRuntime();
// runtime.exec("pm clear "+packInfo.packageName);
Context context = getApplicationContext().createPackageContext(packInfo.packageName,Context.CONTEXT_IGNORE_SECURITY);
deleteCache(context);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
public static void deleteCache(Context context) {
try {
File dir = context.getCacheDir();
deleteDir(dir);
} catch (Exception e) {}
}
public static boolean deleteDir(File dir) {
if (dir != null && dir.isDirectory()) {
String[] children = dir.list();
for (int i = 0; i < children.length; i++) {
boolean success = deleteDir(new File(dir, children[i]));
if (!success) {
return false;
}
}
return dir.delete();
} else if(dir!= null && dir.isFile()) {
return dir.delete();
} else {
return false;
}
}
It is equivalent to clear data option under Settings --> Application Manager --> Your App --> Clear data. (In comment)
For making your application support this you should also follow Privileged Permission Whitelisting from google

Clear cache of app without force closing the app

i need to clear cache of an app without force closing the app. i need app to continue running. i am using espresso to test application but i need to clear cache before the app starts. is there any possible way to do it ?
public static void clearPreferences(Activity activity) {
try {
// clearing app data
String packageName = activity.getPackageName();
Runtime runtime = Runtime.getRuntime();
runtime.exec("pm clear "+packageName);
} catch (Exception e) {
e.printStackTrace();
}
}
this is what i have. but it closes the app and terminates test case

check this link below it's helpful to you.
Clear Cache in Android Application programmatically
public static void deleteCache(Context context) {
try {
File dir = context.getCacheDir();
deleteDir(dir);
} catch (Exception e) {}
}
public static boolean deleteDir(File dir) {
if (dir != null && dir.isDirectory()) {
String[] children = dir.list();
for (int i = 0; i < children.length; i++) {
boolean success = deleteDir(new File(dir, children[i]));
if (!success) {
return false;
}
}
return dir.delete();
} else if(dir!= null && dir.isFile()) {
return dir.delete();
} else {
return false;
}
}
add permission in manifest
<uses-permission android:name="android.permission.CLEAR_APP_CACHE"/>

Clear android cache during the upgrade to new version

Is there some way to programmatically clear the cache of an android app when upgrading to a new version or during an installation?

android have clearApplicationUserData() in ActivityManager Class.
this method will have the same effect as explicit hit on clear app data in settings do.
here's the reference--
http://developer.android.com/reference/android/app/ActivityManager.html#clearApplicationUserData()
hope this helps
cheers!

Write receiver with action "PACKAGE_REPLACED" in manifest.
#Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(Intent.ACTION_PACKAGE_REPLACED)) {
// write logic to delete cache directory
// Get cache dir as context.getCacheDir()
}
}

Revering to this answer you can clear the app's cache the follwing way:
public static void deleteCache(Context context) {
try {
File dir = context.getCacheDir();
if (dir != null && dir.isDirectory()) {
deleteDir(dir);
}
} catch (Exception e) {}
}
private static boolean deleteDir(File dir) {
if (dir != null && dir.isDirectory()) {
String[] children = dir.list();
for (int i = 0; i < children.length; i++) {
boolean success = deleteDir(new File(dir, children[i]));
if (!success) {
return false;
}
}
}
return dir.delete();
}
Simply call deleteCache() everytime your app is updated.
To check whether you app is updated or not you can simply save the version string into a SharedPreference and compare the saved value with the actual one.
public static boolean isNewVersion(Context context) {
String newVersion = "", oldVersion = "";
PackageManager manager = context.getPackageManager();
PackageInfo info = null;
try {
info = manager.getPackageInfo(context.getPackageName(), 0);
newVersion = info.versionName;
} catch (PackageManager.NameNotFoundException e) {
// TODO what to do?
}
oldVersion = getVersionString();
// returns whether the new version string differs (is also false for first install)
return !(oldVersion.equals(DEFVAL_STRING) || oldVersion.equals(newVersion));
}
public static String getVersionString(Context context) {
SharedPreferences preferences = context.getSharedPreferences(PREFERENCE_NAME, Context.MODE_PRIVATE);
return preferences.getString(KEY_VERSION, DEFVAL_STRING);
}

If you just want this for a webview, you can add cache busting to your urls loaded by the webview. Add the app version to the querystring and you'll get a fresh download after users upgrade:
"http://www.stackoverflow.com?v=" + BuildConfig.VERSION_NAME

how to find a rooted device?

I was been trying to find whether a device is rooted or not and if the device is found rooted i do not want my application to get installed.I have tried two of the below methods
private boolean isRooted() {
return findBinary("su");
}
public static boolean findBinary(String binaryName) {
boolean found = false;
if (!found) {
String[] places = { "/sbin/", "/system/bin/", "/system/xbin/",
"/data/local/xbin/", "/data/local/bin/",
"/system/sd/xbin/", "/system/bin/failsafe/", "/data/local/" };
for (String where : places) {
if (new File(where + binaryName).exists()) {
found = true;
break;
}
}
try {
File file = new File("/system/app/Superuser.apk");
if (file.exists()) {
Log.e("ERROR", "Unable to find icon for package '"
+ "apk found");
found = true;
}
} catch (Exception e1) {
// ignore
}
}
return found;
}
But i don't think that these methods are enough to find a rooted device,since there are tools to hide an apk and the su file can be renamed or deleted.Is there any other way or any suggestions which is 100 percent reliable to find a rooted device?
I was trying to edit the su but couldn't do anything.Is it just a word of mouth or really possible to do so? Thanks in advance
***EDITED***:
I have used "HIDE MY ROOT" application to hide the SU binary aswell as superuser.apk.I can make my rooted device, look like unrooted using hide my root application.Therefore i can say that this source is falseproof and not completely reliable to find rooted device.
Kindly let me know if there is any alternative way to find the rooted device..

I did this in the following way :
/*
* Run su command on device
* #throws IOException, InterruptedException
*/
private static boolean suRun() throws IOException, InterruptedException
{
try {
Process su = null;
su = Runtime.getRuntime().exec(new String[] {"su","-c","exit"});
su.waitFor();
InputStream in = su.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(in));
String suOutput = bufferedReader.readLine();
if (suOutput == null)
{
return true;
}
else
{
return false;
}
} catch (Exception ex)
{
return false;
}
}
public static boolean isPhoneRooted() {
// check if /system/app/Superuser.apk is present and can run su
try {
File file = new File("/system/app/Superuser.apk");
if (file.exists() && suRun()) {
Log.d("Blocking Service", "ROOTED PHONE DETECTED");
return true;
}
}
catch (Throwable e1) {
// ignore
}
return false;
}

you can use SafetyNet API from google play service. this is what being used by android pay not only for the root detection but also to check compatibility with android CTS.

Call isRooted() from ShellInterface
isRooted() depend upon majority of three factor
public static boolean isRooted() {
return isRooted1() ? (isRooted2() || isRooted3()) : (isRooted2() && isRooted3());
}
private static boolean isRooted1() {
Process mProcess = null;
boolean mRoot;
try {
// This is executing on terminal
mProcess = Runtime.getRuntime().exec("su");
mRoot = true;
// If the execute successfully then it return to true
} catch (Exception e) {
// if is not successfully then it return to false
mRoot = false;
} finally {
if (mProcess != null) {
try {
mProcess.destroy();
} catch (Exception ignored) {
}
}
}
return mRoot;
}
private static boolean isRooted2() {
String buildTags = Build.TAGS;
return buildTags !=null && buildTags.contains("test-keys");
}
private static boolean isRooted3() {
boolean mRoot = false;
boolean found = false;
if (!found) {
String[] places = {"/sbin/", "/system/bin/","/system/xbin",
"/data/local/xbin","/system/sd/xbin","/data/local"
};
for (String path : places){
if (new File(path+"su").exists()) {
mRoot = true;
found = true;
}
}
}
return mRoot;
}