How to notify users about an Android app update?

Question

I\'ve built an Android app which is now on Play Market. From time to time, I make updates to it, and I\'d like to let users know that a new version is available.

How

Answer 1

i think this is too late but it can be help some one

public enum AppVersionUpgradeNotifier {
INSTANCE;

private static final String TAG = "AppVersionUpdateManager";

private static final String PREFERENCES_APP_VERSION = "pref_app_version_upgrade";
private static final String KEY_LAST_VERSION = "last_version";

private SharedPreferences sharedPreferences;
private VersionUpdateListener versionUpdateListener;
private boolean isInitialized;

public static synchronized void init(Context context, VersionUpdateListener versionUpdateListener) {
    if (context == null || versionUpdateListener == null) {
        throw new IllegalArgumentException(TAG + " : Context or VersionUpdateListener is null");
    }

    if (!INSTANCE.isInitialized) {
        INSTANCE.initInternal(context, versionUpdateListener);
    } else {
        Log.w(TAG, "Init called twice, ignoring...");
    }
}

private void initInternal(Context context, VersionUpdateListener versionUpdateListener) {
    this.sharedPreferences = context.getSharedPreferences(PREFERENCES_APP_VERSION, Context.MODE_PRIVATE);
    this.versionUpdateListener = versionUpdateListener;
    this.isInitialized = true;
    checkVersionUpdate();
}

private void checkVersionUpdate() {
    int lastVersion = getLastVersion();
    int currentVersion = getCurrentVersion();

    if (lastVersion < currentVersion) {
        if (versionUpdateListener.onVersionUpdate(currentVersion, lastVersion)) {
            upgradeLastVersionToCurrent();
        }
    }
}

private int getLastVersion() {
    return sharedPreferences.getInt(KEY_LAST_VERSION, 0);
}

private int getCurrentVersion() {
    return BuildConfig.VERSION_CODE;
}

public void upgradeLastVersionToCurrent() {
    sharedPreferences.edit().putInt(KEY_LAST_VERSION, getCurrentVersion()).apply();
}

public interface VersionUpdateListener {
    boolean onVersionUpdate(int newVersion, int oldVersion);
}

}

use it on

public class MyApplication extends Application implements AppVersionUpgradeNotifier.VersionUpdateListener {

@Override
public void onCreate() {
    super.onCreate();

    AppVersionUpgradeNotifier.init(this,this);
}

@Override
public boolean onVersionUpdate(int newVersion, int oldVersion) {
    //do what you want

    return true;
}

}