I am working on App locker application. If installed this
application in kitkat version device application locking and its
working perfect. In marshmallow|(6.0) version device initially
application is working, if we restart the device app lock is not
working, Locked applications are open without asking any password.
If we just enter application (app Lock app) and exit from app its
working perfect. That time it asks password.
public class StartupServiceReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED)){
if (AppLockerPreference.getInstance(context).isAutoStart()){
if (AppLockerPreference.getInstance(context).isServiceEnabled()){
context.startService(new Intent(context, DetectorService.class));
}else{
AppLockerPreference.getInstance(context).saveServiceEnabled(false);
}
}
return;
}else if (AppLockerPreference.getInstance(context).isServiceEnabled()){
context.startService(new Intent(context, DetectorService.class));
}
}
}
public class AppLockerPreference implements OnSharedPreferenceChangeListener {
Context mContext;
public boolean isAutoStart() {
Log.d("AMK","AppLockerPreference1--->"+mApplicationList.length);
return mAutoStart;
}
public boolean isServiceEnabled() {
Log.d("AMK","AppLockerPreference2--->"+mApplicationList.length);
return mServiceEnabled;
}
public void saveServiceEnabled(boolean serviceEnabled) {
mServiceEnabled = serviceEnabled;
mPref.edit().putBoolean(PREF_SERVICE_ENABLED, mServiceEnabled);
}
public String[] getApplicationList() {
Log.d("AMK","AppLockerPreference3--->"+mApplicationList.length);
return mApplicationList;
}
public void saveApplicationList(String[] applicationList) {
mApplicationList = applicationList;
String combined = "";
for (int i=0; i<mApplicationList.length; i++){
combined = combined + mApplicationList[i] + ";";
}
mPref.edit().putString(PREF_APPLICATION_LIST, combined).commit();
}
private static final String PREF_SERVICE_ENABLED = "service_enabled";
private static final String PREF_APPLICATION_LIST = "application_list";
private static final String PREF_AUTO_START = "start_service_after_boot";
private static final String PREF_PASSWORD = "password";
/**
* Section for singleton pattern
*/
private SharedPreferences mPref;
private AppLockerPreference(Context context) {
mPref = PreferenceManager.getDefaultSharedPreferences(context);
mPref.registerOnSharedPreferenceChangeListener(this);
reloadPreferences();
}
private void reloadPreferences() {
mServiceEnabled = mPref.getBoolean(PREF_SERVICE_ENABLED, true);
mApplicationList = mPref.getString(PREF_APPLICATION_LIST, "").split(";");
Log.d("AMK","selectd apps--->"+mApplicationList);
mAutoStart = mPref.getBoolean(PREF_AUTO_START, true);
mPassword = mPref.getString(PREF_PASSWORD, "2468");
if (mPref.getBoolean("relock_policy", true)){
try{
mRelockTimeout = Integer.parseInt(mPref.getString("relock_timeout", "-1"));
}catch(Exception e){
mRelockTimeout = -1;
}
}else{
mRelockTimeout = -1;
}
}
private static AppLockerPreference mInstance;
public static AppLockerPreference getInstance(Context context){
return mInstance == null ?
(mInstance = new AppLockerPreference(context)) :
mInstance;
}
private boolean mServiceEnabled, mAutoStart;
private String[] mApplicationList;
private String mPassword;
private int mRelockTimeout;
public int getRelockTimeout(){
return mRelockTimeout;
}
public String getPassword() {
return mPassword;
}
public void savePassword(String password) {
mPassword = password;
mPref.edit().putString(PREF_PASSWORD, password);
}
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences,
String key) {
reloadPreferences();
}
}
Could you please help me.
check if the device is marshmallow and give permissions
if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.MARSHMALLOW) {
// only for marshmallow and newer versions
}
I am developing an Android chat app using Layer and Parse. I have reached a point where i have to indicate if a friend is online or not. I have read the documentations on their websites but i dont find anything related to online presence. Is there a document that i have not seen? Please share some insight on how to know if a user is online when using Layer/Parse.
You just create on column inside User table, isonline, and set that flag true and false base on app open and close.
public static final String CLASSNAME = "userclass";
public static final String USERID = "userid";
public static final String USERNAME = "username";
public static final String USERLASTNAME = "lastname";
public static final String USERONLINE = "isonline";
public static void setOnline(String userId, boolean isOnline)
{
ParseQuery<ParseObject> query = ParseQuery.getQuery(UserDao.CLASSNAME);
query.whereEqualTo(USERID, userId);
List<ParseObject> list = new ArrayList<ParseObject>();
try {
list = query.find();
} catch (ParseException e) {
e.printStackTrace();
}
if(list.size() == 1)
{
ParseObject object = list.get(0);
if (isOnline) object.put(USERONLINE,1);
else object.put(USERONLINE,0);
object.saveInBackground();
}
}
In Site Catalyst we have defined Custom Traffic Variable "Item Bought". Now how do i send request to update this custom variable from Android library? i don't find much help here
Please find my code below,
public class TrackingHelper {
private static final String TRACKING_RSID = "MY_TRACKING_RSID";
private static final String TRACKING_SERVER = "MY_TRACKING_SERVER";
static ADMS_Measurement measurement = null;
public static void startActivity(Activity activity) {
measurement = ADMS_Measurement.sharedInstance(activity);
measurement.startActivity(activity);
}
public static void stopActivity() {
measurement = ADMS_Measurement.sharedInstance();
measurement.stopActivity();
}
public static void configureAppMeasurement(Activity activity) {
if (measurement == null) {
measurement = ADMS_Measurement.sharedInstance(activity);
measurement.configureMeasurement(TRACKING_RSID, TRACKING_SERVER);
measurement.setOfflineTrackingEnabled(true);
measurement.setDebugLogging(true);
}
}
public static void trackItemBought() {
if (measurement != null) {
measurement = ADMS_Measurement.sharedInstance();
Hashtable<String, Object> contextData = new Hashtable<String, Object>();
contextData.put("Item Bought", "Item Bought");
measurement.setEvents("Item Bought");
measurement.track(contextData);
}
}
}
I can't vouch for the android code, but here are some general thoughts:
When you send a context data variable, you send a name-value pair, so I suspect this line:
contextData.put("Item Bought", "Item Bought");
Should be something more like this (I'm going to say the item being bought is a basketball):
contextData.put("Item Bought", "Basketball");
Then someone with access to processing rules in SiteCatalyst will need to configure a rule to say that that variable ("Item Bought") belongs to its assigned custom traffic variable (prop14, for instance). http://www.jasonegan.net/2011/04/07/omniture-sitecatalyst-15-context-variables-processing-rules/ talks about how to do that a bit, but the article generally assumes you have a certain level of knowledge of SiteCatalyst.
Just make the following change in your code.
public class TrackingHelper {
private static final String TRACKING_RSID = "MY_TRACKING_RSID";
private static final String TRACKING_SERVER = "MY_TRACKING_SERVER";
static ADMS_Measurement measurement = null;
public static void startActivity(Activity activity) {
measurement = ADMS_Measurement.sharedInstance(activity);
measurement.startActivity(activity);
}
public static void stopActivity() {
measurement = ADMS_Measurement.sharedInstance();
measurement.stopActivity();
}
public static void configureAppMeasurement(Activity activity) {
if (measurement == null) {
measurement = ADMS_Measurement.sharedInstance(activity);
measurement.configureMeasurement(TRACKING_RSID, TRACKING_SERVER);
measurement.setOfflineTrackingEnabled(true);
measurement.setDebugLogging(true);
}
}
public static void trackItemBought() {
if (measurement != null) {
measurement = ADMS_Measurement.sharedInstance();
Hashtable<String, Object> contextData = new Hashtable<String, Object>();
contextData.put("Item Bought", "Item Bought");
measurement.setEvents("Item Bought");
measurement.contextData(contextData);
measurement.track();
}
}
i have a weird issue.
I'm trying to pass 2 parcable classesfrom one activity to another.
I define both of them the exact same way, but of them is null.
The parcable class :
class Friends implements Parcelable {
private ArrayList<Integer> ids = new ArrayList<Integer>();
private ArrayList<String> names = new ArrayList<String>();
private ArrayList<Bitmap> images = new ArrayList<Bitmap>();
public void addId(Integer id)
{
ids.add(id);
}
public void addName(String name){
names.add(name);
}
public void addImage(Bitmap img){
images.add(img);
}
public ArrayList<Integer> getIds() {
return ids;
}
public ArrayList<String> getNames() {
return names;
}
public ArrayList<Bitmap> getImages() {
return images;
}
#Override
public int describeContents() {
// TODO Auto-generated method stub
return 0;
}
#Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeList(ids);
dest.writeList(names);
dest.writeList(images);
}
public static final Parcelable.Creator<Friends> CREATOR = new Parcelable.Creator<Friends>() {
public Friends createFromParcel(Parcel in) {
return new Friends(in);
}
public Friends[] newArray(int size) {
return new Friends[size];
}
};
public Friends(Parcel in){
in.readList(ids, null);
in.readList(names, null);
in.readList(images, null);
}
public Friends(Integer id, String name, Bitmap img) {
ids.add(id);
names.add(name);
images.add(img);
}
public Friends(){
}
The Sending part :
for(Integer position : selectedIds)
{
String name = a.getItem(position).getFriendName();
int id = a.getItem(position).getFriendId();
Bitmap img = a.getItem(position).getFriendImage();
Log.e("ID",String.valueOf(id));
selectedFriends.addId(new Integer(id));
selectedFriends.addName(name);
selectedFriends.addImage(img);
}
for(int position=0;position<list.getCount(); position++)
{
String name = a.getItem(position).getFriendName();
int id = a.getItem(position).getFriendId();
Bitmap img = a.getItem(position).getFriendImage();
Log.e("All IDs",String.valueOf(id));
allFriends.addId(new Integer(id));
allFriends.addName(name);
allFriends.addImage(img);
}
b.putParcelable("selecet_friends", selectedFriends);
b.putParcelable("all_friends", allFriends);
data.putExtras(b);
Both of the loops are being runned ( i can see the logs), all variables you don't see are being initialized correctly, everything is fine.
The Reciving part :
i define both as null :
private Friends selectedFriends = null;
private Friends allFriends = null;
And handle the onResult like this :
Log.e("Result","yessss");
Friends all_friends = (Friends)data.getParcelableExtra("all_friends");
Friends selected_friends = (Friends)data.getParcelableExtra("selected_friends");
allFriends = all_friends;
selectedFriends = selected_friends;
if(selectedFriends != null){
Log.e("is null","No");
}
if(allFriends != null){
Log.e("is all null","No");
}
Does anyone know how come the selectedFriends is null when allFriends is not?
EDIT:
Just a thought, but maybe it's because i put 2 parcables on a Bundle?
just i just add 2 bundles?
In the sending method you have a typo in this line:
b.putParcelable("selecet_friends", selectedFriends);
try this instead:
b.putParcelable("selected_friends", selectedFriends);
Also, you should use more specific names for the keys. The documentation for putExtras() says:
Add a set of extended data to the intent. The keys must include a
package prefix, for example the app com.android.contacts would use
names like "com.android.contacts.ShowAll
On the iPhone, you can add a numbered badge to the application icon. On BlackBerry, I've successfully painted an image onto the application's icon while in the program. I want to do this for Android as well. I don't want to use the notification bar, as it's not something that needs to be notified instantly. Instead, I just want the user to be able to see how many new messages are in the application just by looking at the application icon.
Unfortunately, Android does not allow changing of the application icon because it's sealed in the APK once the program is compiled. There is no way to programmatically change it to a 'drawable'.
You may achieve your goal by using a widget instead of an icon. Widgets are highly customisable and can do what you want.
There's a short discussion about the difference between iPhone icon notification and using widgets here:
http://www.cnet.com/8301-19736_1-10278814-251.html
As you'll notice, there is virtually no difference between using a widget or an icon, since they can be the same size and look the same.
This can also be done for Sony's Xperia Home. I've blogged about it here, but the important parts are below. Sony devices use a class named BadgeReciever.
Declare the com.sonyericsson.home.permission.BROADCAST_BADGE permission in your manifest file:
Broadcast an Intent to the BadgeReceiver:
Intent intent = new Intent();
intent.setAction("com.sonyericsson.home.action.UPDATE_BADGE");
intent.putExtra("com.sonyericsson.home.intent.extra.badge.ACTIVITY_NAME", "com.yourdomain.yourapp.MainActivity");
intent.putExtra("com.sonyericsson.home.intent.extra.badge.SHOW_MESSAGE", true);
intent.putExtra("com.sonyericsson.home.intent.extra.badge.MESSAGE", "99");
intent.putExtra("com.sonyericsson.home.intent.extra.badge.PACKAGE_NAME", "com.yourdomain.yourapp");
sendBroadcast(intent);
Done. Once this Intent is broadcast the launcher should show a badge on your application icon.
To remove the badge again, simply send a new broadcast, this time with SHOW_MESSAGE set to false:
intent.putExtra("com.sonyericsson.home.intent.extra.badge.SHOW_MESSAGE", false);
I've excluded details on how I found this to keep the answer short, but it's all available in the blog. Might be an interesting read for someone.
I've also posted a seperate SO question about this here and will add the full answer there once I'm allowed to (need 10 reputation to answer my own question within 8 hours).
ShortcutBadger library makes it possible and works with LG, Sony, Samsung, HTC and other custom Launchers.
It even has a way to display Badge Count in Pure Android devices desktop.
Updating the Badge Count in the application icon is as easy as calling:
int badgeCount = 1;
ShortcutBadger.setBadge(getApplicationContext(), badgeCount);
It includes a demo application that allows you to test its behaviour.
OR
you can also try activity-alias to do so, but in this you need to create different icons with badge values ,it will work great in case- you need to switch between 2 different App icons (need to create different activity-alias for displaying different icon i.e more icons = more activity-alias).
Asus devices:
public static class AsusHomeBadger implements Badger {
private static final String INTENT_ACTION = "android.intent.action.BADGE_COUNT_UPDATE";
private static final String INTENT_EXTRA_BADGE_COUNT = "badge_count";
private static final String INTENT_EXTRA_PACKAGENAME = "badge_count_package_name";
private static final String INTENT_EXTRA_ACTIVITY_NAME = "badge_count_class_name";
#Override
public void executeBadge(int badgeCount) {
final Intent intent = new Intent(INTENT_ACTION);
intent.putExtra(INTENT_EXTRA_BADGE_COUNT, badgeCount);
intent.putExtra(INTENT_EXTRA_PACKAGENAME, componentName.getPackageName());
intent.putExtra(INTENT_EXTRA_ACTIVITY_NAME, componentName.getClassName());
intent.putExtra("badge_vip_count", 0);
if (canResolveBroadcast(intent)) {
AndroidUtilities.runOnUIThread(new Runnable() {
#Override
public void run() {
ApplicationLoader.applicationContext.sendBroadcast(intent);
}
});
}
}
#Override
public List<String> getSupportLaunchers() {
return Arrays.asList("com.asus.launcher");
}
}
Huawei devices:
public static class HuaweiHomeBadger implements Badger {
#Override
public void executeBadge(int badgeCount) {
final Bundle localBundle = new Bundle();
localBundle.putString("package", ApplicationLoader.applicationContext.getPackageName());
localBundle.putString("class", componentName.getClassName());
localBundle.putInt("badgenumber", badgeCount);
AndroidUtilities.runOnUIThread(new Runnable() {
#Override
public void run() {
try {
ApplicationLoader.applicationContext.getContentResolver().call(Uri.parse("content://com.huawei.android.launcher.settings/badge/"), "change_badge", null, localBundle);
} catch (Exception e) {
FileLog.e(e);
}
}
});
}
#Override
public List<String> getSupportLaunchers() {
return Arrays.asList(
"com.huawei.android.launcher"
);
}
}
HTC devices:
public static class NewHtcHomeBadger implements Badger {
public static final String INTENT_UPDATE_SHORTCUT = "com.htc.launcher.action.UPDATE_SHORTCUT";
public static final String INTENT_SET_NOTIFICATION = "com.htc.launcher.action.SET_NOTIFICATION";
public static final String PACKAGENAME = "packagename";
public static final String COUNT = "count";
public static final String EXTRA_COMPONENT = "com.htc.launcher.extra.COMPONENT";
public static final String EXTRA_COUNT = "com.htc.launcher.extra.COUNT";
#Override
public void executeBadge(int badgeCount) {
final Intent intent1 = new Intent(INTENT_SET_NOTIFICATION);
intent1.putExtra(EXTRA_COMPONENT, componentName.flattenToShortString());
intent1.putExtra(EXTRA_COUNT, badgeCount);
final Intent intent = new Intent(INTENT_UPDATE_SHORTCUT);
intent.putExtra(PACKAGENAME, componentName.getPackageName());
intent.putExtra(COUNT, badgeCount);
if (canResolveBroadcast(intent1) || canResolveBroadcast(intent)) {
AndroidUtilities.runOnUIThread(new Runnable() {
#Override
public void run() {
ApplicationLoader.applicationContext.sendBroadcast(intent1);
ApplicationLoader.applicationContext.sendBroadcast(intent);
}
});
}
}
#Override
public List<String> getSupportLaunchers() {
return Arrays.asList("com.htc.launcher");
}
}
Samsung devices:
public static class SamsungHomeBadger implements Badger {
private static final String CONTENT_URI = "content://com.sec.badge/apps?notify=true";
private static final String[] CONTENT_PROJECTION = new String[]{"_id","class"};
private static DefaultBadger defaultBadger;
#Override
public void executeBadge(int badgeCount) {
try {
if (defaultBadger == null) {
defaultBadger = new DefaultBadger();
}
defaultBadger.executeBadge(badgeCount);
} catch (Exception ignore) {
}
Uri mUri = Uri.parse(CONTENT_URI);
ContentResolver contentResolver = ApplicationLoader.applicationContext.getContentResolver();
Cursor cursor = null;
try {
cursor = contentResolver.query(mUri, CONTENT_PROJECTION, "package=?", new String[]{componentName.getPackageName()}, null);
if (cursor != null) {
String entryActivityName = componentName.getClassName();
boolean entryActivityExist = false;
while (cursor.moveToNext()) {
int id = cursor.getInt(0);
ContentValues contentValues = getContentValues(componentName, badgeCount, false);
contentResolver.update(mUri, contentValues, "_id=?", new String[]{String.valueOf(id)});
if (entryActivityName.equals(cursor.getString(cursor.getColumnIndex("class")))) {
entryActivityExist = true;
}
}
if (!entryActivityExist) {
ContentValues contentValues = getContentValues(componentName, badgeCount, true);
contentResolver.insert(mUri, contentValues);
}
}
} finally {
close(cursor);
}
}
private ContentValues getContentValues(ComponentName componentName, int badgeCount, boolean isInsert) {
ContentValues contentValues = new ContentValues();
if (isInsert) {
contentValues.put("package", componentName.getPackageName());
contentValues.put("class", componentName.getClassName());
}
contentValues.put("badgecount", badgeCount);
return contentValues;
}
#Override
public List<String> getSupportLaunchers() {
return Arrays.asList(
"com.sec.android.app.launcher",
"com.sec.android.app.twlauncher"
);
}
}
Sony devices:
public static class SonyHomeBadger implements Badger {
private static final String INTENT_ACTION = "com.sonyericsson.home.action.UPDATE_BADGE";
private static final String INTENT_EXTRA_PACKAGE_NAME = "com.sonyericsson.home.intent.extra.badge.PACKAGE_NAME";
private static final String INTENT_EXTRA_ACTIVITY_NAME = "com.sonyericsson.home.intent.extra.badge.ACTIVITY_NAME";
private static final String INTENT_EXTRA_MESSAGE = "com.sonyericsson.home.intent.extra.badge.MESSAGE";
private static final String INTENT_EXTRA_SHOW_MESSAGE = "com.sonyericsson.home.intent.extra.badge.SHOW_MESSAGE";
private static final String PROVIDER_CONTENT_URI = "content://com.sonymobile.home.resourceprovider/badge";
private static final String PROVIDER_COLUMNS_BADGE_COUNT = "badge_count";
private static final String PROVIDER_COLUMNS_PACKAGE_NAME = "package_name";
private static final String PROVIDER_COLUMNS_ACTIVITY_NAME = "activity_name";
private static final String SONY_HOME_PROVIDER_NAME = "com.sonymobile.home.resourceprovider";
private final Uri BADGE_CONTENT_URI = Uri.parse(PROVIDER_CONTENT_URI);
private static AsyncQueryHandler mQueryHandler;
#Override
public void executeBadge(int badgeCount) {
if (sonyBadgeContentProviderExists()) {
executeBadgeByContentProvider(badgeCount);
} else {
executeBadgeByBroadcast(badgeCount);
}
}
#Override
public List<String> getSupportLaunchers() {
return Arrays.asList("com.sonyericsson.home", "com.sonymobile.home");
}
private static void executeBadgeByBroadcast(int badgeCount) {
final Intent intent = new Intent(INTENT_ACTION);
intent.putExtra(INTENT_EXTRA_PACKAGE_NAME, componentName.getPackageName());
intent.putExtra(INTENT_EXTRA_ACTIVITY_NAME, componentName.getClassName());
intent.putExtra(INTENT_EXTRA_MESSAGE, String.valueOf(badgeCount));
intent.putExtra(INTENT_EXTRA_SHOW_MESSAGE, badgeCount > 0);
AndroidUtilities.runOnUIThread(new Runnable() {
#Override
public void run() {
ApplicationLoader.applicationContext.sendBroadcast(intent);
}
});
}
private void executeBadgeByContentProvider(int badgeCount) {
if (badgeCount < 0) {
return;
}
if (mQueryHandler == null) {
mQueryHandler = new AsyncQueryHandler(ApplicationLoader.applicationContext.getApplicationContext().getContentResolver()) {
#Override
public void handleMessage(Message msg) {
try {
super.handleMessage(msg);
} catch (Throwable ignore) {
}
}
};
}
insertBadgeAsync(badgeCount, componentName.getPackageName(), componentName.getClassName());
}
private void insertBadgeAsync(int badgeCount, String packageName, String activityName) {
final ContentValues contentValues = new ContentValues();
contentValues.put(PROVIDER_COLUMNS_BADGE_COUNT, badgeCount);
contentValues.put(PROVIDER_COLUMNS_PACKAGE_NAME, packageName);
contentValues.put(PROVIDER_COLUMNS_ACTIVITY_NAME, activityName);
mQueryHandler.startInsert(0, null, BADGE_CONTENT_URI, contentValues);
}
private static boolean sonyBadgeContentProviderExists() {
boolean exists = false;
ProviderInfo info = ApplicationLoader.applicationContext.getPackageManager().resolveContentProvider(SONY_HOME_PROVIDER_NAME, 0);
if (info != null) {
exists = true;
}
return exists;
}
}
Xiaomi devices:
public static class XiaomiHomeBadger implements Badger {
public static final String INTENT_ACTION = "android.intent.action.APPLICATION_MESSAGE_UPDATE";
public static final String EXTRA_UPDATE_APP_COMPONENT_NAME = "android.intent.extra.update_application_component_name";
public static final String EXTRA_UPDATE_APP_MSG_TEXT = "android.intent.extra.update_application_message_text";
#Override
public void executeBadge(int badgeCount) {
try {
Class miuiNotificationClass = Class.forName("android.app.MiuiNotification");
Object miuiNotification = miuiNotificationClass.newInstance();
Field field = miuiNotification.getClass().getDeclaredField("messageCount");
field.setAccessible(true);
field.set(miuiNotification, String.valueOf(badgeCount == 0 ? "" : badgeCount));
} catch (Throwable e) {
final Intent localIntent = new Intent(INTENT_ACTION);
localIntent.putExtra(EXTRA_UPDATE_APP_COMPONENT_NAME, componentName.getPackageName() + "/" + componentName.getClassName());
localIntent.putExtra(EXTRA_UPDATE_APP_MSG_TEXT, String.valueOf(badgeCount == 0 ? "" : badgeCount));
if (canResolveBroadcast(localIntent)) {
AndroidUtilities.runOnUIThread(new Runnable() {
#Override
public void run() {
ApplicationLoader.applicationContext.sendBroadcast(localIntent);
}
});
}
}
}
#Override
public List<String> getSupportLaunchers() {
return Arrays.asList(
"com.miui.miuilite",
"com.miui.home",
"com.miui.miuihome",
"com.miui.miuihome2",
"com.miui.mihome",
"com.miui.mihome2"
);
}
}
As of API 26, this is now officially supported:
Starting with 8.0 (API level 26), notification badges (also known as notification dots) appear on a launcher icon when the associated app has an active notification. Users can long-press on the app icon to reveal the notifications (alongside any app shortcuts), as shown in figure 1.
These dots appear by default in launcher apps that support them and there's nothing your app needs to do. However, there might be situations in which you don't want the to notification dot to appear or you want to control exactly which notifications to appear there.
To set a custom number, call setNumber() on the notification:
mNotification.setNumber(messageCount)
Here's how to do it for:
Apex Launcher
Nova Launcer
I think there's also a way to do it on the LG launcher, but haven't found out how yet.