We Keep Coding

Playing multiple sounds via multiple buttons from raw in background using service

I want to play 6 different sounds triggered by 6 different buttons in background, so that if the app is on background the sound keeps playing.
When one sound is already playing, pressing another button will stop it and play its own sound,
Tapping the same button 2K times it stops, 2K+1 times: starts again.. (K is a non-null integer)
All of the code is done and seems to be working correctly, except that the player stops after one and a half minute. (This is not because of low memory)
Can anyone please tell me what am I doing wrong?
public class PlayService extends Service {
private MediaPlayer player;
#Nullable
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public void onCreate() {
super.onCreate();
player = new MediaPlayer();
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
super.onStartCommand(intent, flags, startId);
int btnId = intent.getExtras().getInt("ID");
Toast.makeText(this, "onStart service" + btnId, Toast.LENGTH_SHORT).show();
selectResId(btnId);
return START_STICKY;
}
#Override
public void onDestroy() {
super.onDestroy();
Toast.makeText(this, "Service destroyed", Toast.LENGTH_SHORT).show();
if (player != null) {
player.stop();
player.release();
}
player = null;
}
#Override
public void onLowMemory() {
super.onLowMemory();
Toast.makeText(this, "Low mem", Toast.LENGTH_SHORT).show();
}
private void selectResId(int resId){
switch (resId){
case 1: playMediaFromResource(R.raw.number_one);
case 2: playMediaFromResource(R.raw.number_two);
case 3: playMediaFromResource(R.raw.number_three);
case 4: playMediaFromResource(R.raw.number_four);
case 5: playMediaFromResource(R.raw.number_five);
case 6: playMediaFromResource(R.raw.number_six);
default: break;
}
}
private void playMediaFromResource(int resId) {
Uri mediaPath = Uri.parse("android.resource://" + getPackageName() + "/" + resId);
try {
player.setDataSource(getApplicationContext(), mediaPath);
player.setLooping(true);
player.prepare();
player.start();
} catch (Exception e) {
e.printStackTrace();
}
}
}
And the MainActivity:
public class MainActivity extends AppCompatActivity {
private Button btnStart1;
private Button btnStart2;
private Button btnStart3;
private Button btnStart4;
private Button btnStart5;
private Button btnStart6;
private Intent intent;
private int previousID = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
findViewsByIds();
setOnClickListeners();
}
private void findViewsByIds() {
btnStart1 = findViewById(R.id.btn_start_1);
btnStart2 = findViewById(R.id.btn_start_2);
btnStart3 = findViewById(R.id.btn_start_3);
btnStart4 = findViewById(R.id.btn_start_4);
btnStart5 = findViewById(R.id.btn_start_5);
btnStart6 = findViewById(R.id.btn_start_6);
}
private void setOnClickListeners() {
btnStart1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
checkIntentState(1);
}
});
btnStart2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
checkIntentState(2);
}
});
btnStart3.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
checkIntentState(3);
}
});
btnStart4.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
checkIntentState(4);
}
});
btnStart5.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
checkIntentState(5);
}
});
btnStart6.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
checkIntentState(6);
}
});
}
private void checkIntentState(int ID) {
if (intent == null) {
createNewIntent(ID);
} else {
stopService(intent);
intent = null;
if (ID != previousID) {
createNewIntent(ID);
}
}
}
private void createNewIntent(int ID) {
intent = new Intent(MainActivity.this, PlayService.class);
intent.putExtra("ID", ID);
startService(intent);
previousID = ID;
}
}

I want to answer to my own question just in case anyone else runs into the problem.
It turns out, that Android added some new features (restricted access to background resources for battery life improvement purposes since Oreo(i.e. Android 8.0+ || API level 26)).
As the documentation says:
"Apps that are running in the background now have limits on how freely they can access background services."
So, in this case we will need to use foreground services.

SharedPreferences gives default values on some devices

I am using this code to save key-value pair in shared preferences and its working fine on my device but on emulators and other real devices, it always returns the default values.
public class MainActivity extends AppCompatActivity implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {
public static final String USER_PREFS = "com.aamir.friendlocator.friendlocator.USER_PREFERENCE_FILE_KEY";
SharedPreferences sharedPreferences;
private static String userKey="";
GoogleApiClient mGoogleApiClient;
Location mLastLocation;
static final int PERMISSION_ACCESS_FINE_LOCATION = 1;
boolean FINE_LOCATION_PERMISSION_GRANTED = false;
TextView textViewLocationData;
TextView textViewKeyDisplay;
Button buttonRefresh;
Button btnCopyKey;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
goToActivityFriends();
}
});
fab.setImageDrawable(ContextCompat.getDrawable(this, R.drawable.ic_people_white_48dp));
textViewLocationData = (TextView) findViewById(R.id.textViewLocationData);
textViewKeyDisplay =(TextView) findViewById(R.id.tvKeyDisplay);
buttonRefresh = (Button) findViewById(R.id.buttonRefresh);
btnCopyKey = (Button) findViewById(R.id.btnCopyKey);
sharedPreferences = getApplicationContext().getSharedPreferences(USER_PREFS, Context.MODE_PRIVATE);
String key = sharedPreferences.getString("key", "");
if(!key.equals("")) {
textViewKeyDisplay.setText(key);
}
// Create an instance of GoogleAPIClient.
buildGoogleApiClient();
//user_sp = getSharedPreferences(USER_PREFS, 0);
buttonRefresh.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
displayLocation();
}
});
btnCopyKey.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
ClipboardManager clipboard = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
ClipData clip = ClipData.newPlainText("userKey", textViewKeyDisplay.getText().toString());
clipboard.setPrimaryClip(clip);
Toast.makeText(getBaseContext(), "Key copied !", Toast.LENGTH_SHORT).show();
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
#Override
protected void onStart() {
super.onStart();
if (mGoogleApiClient != null) mGoogleApiClient.connect();
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
protected synchronized void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API).build();
}
private void displayLocation() {
int permissionCheck = ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION);
if ( permissionCheck != PackageManager.PERMISSION_GRANTED)
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.ACCESS_FINE_LOCATION},PERMISSION_ACCESS_FINE_LOCATION);
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
if (mLastLocation != null) {
double latitude = mLastLocation.getLatitude();
double longitude = mLastLocation.getLongitude();
textViewLocationData.setText(latitude + ", " + longitude);
sharedPreferences = getApplicationContext().getSharedPreferences(USER_PREFS, Context.MODE_PRIVATE);
String key = sharedPreferences.getString("key", "");
Log.d("User Key",key);
updateServers(latitude, longitude,key);
} else {
textViewLocationData
.setText("Couldn't get the location. Make sure location is enabled on the device");
}
}
#Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case PERMISSION_ACCESS_FINE_LOCATION: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
FINE_LOCATION_PERMISSION_GRANTED = true;
//displayLocation();
} else {
FINE_LOCATION_PERMISSION_GRANTED = false;
}
return;
}
}
}
#Override
public void onConnectionFailed(ConnectionResult result) {
Log.i("", "Connection failed: ConnectionResult.getErrorCode() = "
+ result.getErrorCode());
}
#Override
public void onConnected(Bundle arg0) {
// Once connected with google api, get the location
//displayLocation();
}
#Override
public void onConnectionSuspended(int arg0) {
mGoogleApiClient.connect();
}
public void goToActivityFriends () {
Intent intent = new Intent(this, com.aamir.friendlocator.friendlocator.Friends.class);
startActivity(intent);
}
public void updateServers(Double lat,Double lon,String Key) {
if (Key.equals("")) {
Retrofit.Builder builder = new Retrofit.Builder()
.baseUrl("")
.addConverterFactory(GsonConverterFactory.create());
Retrofit retrofit = builder.build();
SendLocation cleint = retrofit.create(SendLocation.class);
Call<com.aamir.friendlocator.friendlocator.Models.SendLocation> call = cleint.registerUser(String.valueOf(lat), String.valueOf(lon), Key);
call.enqueue(new Callback<com.aamir.friendlocator.friendlocator.Models.SendLocation>() {
#Override
public void onResponse(Call<com.aamir.friendlocator.friendlocator.Models.SendLocation> call, Response<com.aamir.friendlocator.friendlocator.Models.SendLocation> response) {
Log.d("Response", response.body().getUserKey());
if (!response.body().getUserKey().isEmpty()) {
String key_user = response.body().getUserKey();
textViewKeyDisplay.setText(key_user);
// Writing data to SharedPreferences
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString("key", userKey);
if(editor.commit()){
Log.d("saved","saved");
}
}
}
#Override
public void onFailure(Call<com.aamir.friendlocator.friendlocator.Models.SendLocation> call, Throwable t) {
Log.e("Response", t.toString());
}
});
}
else {
Retrofit.Builder builder = new Retrofit.Builder()
.baseUrl("http://demoanalysis.com/pro03/FriendLocator/")
.addConverterFactory(GsonConverterFactory.create());
Retrofit retrofit = builder.build();
SendLocation cleint = retrofit.create(SendLocation.class);
Call<com.aamir.friendlocator.friendlocator.Models.SendLocation> call = cleint.updateLocation(String.valueOf(lat), String.valueOf(lon), Key);
call.enqueue(new Callback<com.aamir.friendlocator.friendlocator.Models.SendLocation>() {
#Override
public void onResponse(Call<com.aamir.friendlocator.friendlocator.Models.SendLocation> call, Response<com.aamir.friendlocator.friendlocator.Models.SendLocation> response) {
Log.d("Response", response.body().getLocationStatus());
if (!response.body().getLocationStatus().isEmpty()) {
Toast.makeText(MainActivity.this,response.body().getLocationStatus(),Toast.LENGTH_LONG).show();
}
}
#Override
public void onFailure(Call<com.aamir.friendlocator.friendlocator.Models.SendLocation> call, Throwable t) {
Log.e("Response", t.toString());
}
});
}
}
}
On some devices, it's working perfectly. I did change context from this to getApplicationContext but no progress. I have updated the code.

Edit:
tl;dr : you write the wrong variable into the preferences.
Your variable userKey is never written and always an empty string.
In your retrofit onResponse you put userKey as value of "key" into the
preferences. This writes an empty string into the preferences. This will work and give you no error.
Please assign userKey with the value of key_user.
Your response is only stored to key_user.
Or directly remove the local variable key_user as follows:
public void onResponse(Call<com.aamir.friendlocator.friendlocator.Models.SendLocation> call, Response<com.aamir.friendlocator.friendlocator.Models.SendLocation> response) {
Log.d("Response", response.body().getUserKey());
if (!response.body().getUserKey().isEmpty()) {
String userKey = response.body().getUserKey();
textViewKeyDisplay.setText(userKey);
// Writing data to SharedPreferences
SharedPreferences.Editor editor = sharedPreferences.edit();
editor.putString("key", userKey);
if(editor.commit()){
Log.d("saved","saved");
}
}
}
Before:
In your code to save, you directly try to gather the previously saved value using editor.apply();
As documentation states out, apply will save your changes in background on a different thread.
Therefore your changes might not be saved at the time you try to get the value,
some lines below.
Try to use editor.commit(); instead and check if the problem is still there.

I'm share here my own Preference Class it's too easy so you can put in any project.
Put this class into your util folder or anywhere.
AppPreference.java
package util;
import android.content.Context;
import android.content.SharedPreferences;
/**
* Created by Pranav on 25/06/16.
*/
public class AppPreference {
public static final String PREF_IS_LOGIN = "prefIsLogin";
public static final class PREF_KEY {
public static final String LOGIN_STATUS = "loginstatus";
}
public static final void setStringPref(Context context, String prefKey, String key, String value) {
SharedPreferences sp = context.getSharedPreferences(prefKey, 0);
SharedPreferences.Editor edit = sp.edit();
edit.putString(key, value);
edit.commit();
}
public static final String getStringPref(Context context, String prefName, String key) {
SharedPreferences sp = context.getSharedPreferences(prefName, 0);
return sp.getString(key, "");
}
}
Set Preference Value in Login.java when user Login set value like this :
AppPreference.setStringPref(context, AppPreference.PREF_IS_LOGIN, AppPreference.PREF_KEY.LOGIN_STATUS, "0");
Then you will get Login Status Value in any Class by Calling like this :
String LoginStatus = AppPreference.getStringPref(context, AppPreference.PREF_IS_LOGIN, AppPreference.PREF_KEY.LOGIN_STATUS);

service data reset after swiping away application

Purpose of program: I'm trying to make an app that will count how many times the user checked their phone by issuing a broadcast for Intent.ACTION_SCREEN_ON. it then increments a counter and updates the activity with the new counter.
The problem: This all works just fine but as soon as I swipe away the application from the apps tray, the counter goes back to zero.
obviously what is supposed to happen is the counter would continue.
I tried saving the counter value in the service onDestroy and then calling it again onCreate but onDestroy is never called.
Note that in the onCreate() for the activity it sends a broadcast to the service asking for the most recent value of counter and then updates it in the view. I couldn't find a better way to keep them in sync.
CounterService.java
public class CounterService extends Service {
public static boolean RERUN = true;
private int counter = 0;
private SharedPreferences SP;
private BroadcastReceiver mScreenStateBroadcastReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)) {
counter++;
System.out.println("************************************* \n \n " + counter);
}
sendCounterBroadcast();
}
};
public void sendCounterBroadcast() {
Intent i = new Intent();
i.setAction("com.inc.count");
i.putExtra("counterValue", counter);
sendBroadcast(i);
}
#Override
public void onCreate() {
super.onCreate();
System.out.println("********************** CounterService.onCreate()");
// get counter value from SP -- this is useful for when the service gets recreated
SP = getSharedPreferences("Counter Service Data", MODE_PRIVATE);
counter = SP.getInt("counter", 0);
// wait for screen to be turned on or for the activity to ask you for the counter number
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction(Intent.ACTION_SCREEN_ON);
intentFilter.addAction("send.counter.to.phonecounteractivity");
registerReceiver(mScreenStateBroadcastReceiver, intentFilter);
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
return Service.START_STICKY;
}
#Override
public void onDestroy() {
super.onDestroy();
System.out.println("***************************************** CounterService.OnDestroy()");
unregisterReceiver(mScreenStateBroadcastReceiver);
// Save counter value for when we restart service
SP = getSharedPreferences("Counter Service Data", MODE_PRIVATE);
SharedPreferences.Editor SPE = SP.edit();
if (RERUN) {
SPE.putInt("counter", counter);
System.out.println("******************************** RESTARTING SERVICE ");
startService(new Intent(getApplicationContext(), CounterService.class));
} else
SPE.putInt("counter", 0);
SPE.apply();
}
#Override
public IBinder onBind(Intent intent) {
return null;
}
}
PhoneCheckerCounter.Java
public class PhoneCheckerCounter extends AppCompatActivity {
private BroadcastReceiver changeCount;
private IntentFilter filter;
private int counter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_phone_checker_counter);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
switcherOnClick();
assignValuesOnCreate();
System.out.println("**************************** onCreate()");
changeCounterText();
}
public void switcherOnClick() {
final Switch sCounter = findViewById(R.id.switchCounter);
sCounter.setOnClickListener(new View.OnClickListener() {
Intent intent = new Intent(getApplicationContext(), CounterService.class);
#Override
public void onClick(View v) {
if (sCounter.isChecked()) {
startService(intent);
CounterService.RERUN = true;
v.getContext().registerReceiver(changeCount, filter);
Toast.makeText(getApplicationContext(), "Counting has begun", Toast.LENGTH_SHORT).show();
} else {
TextView n = findViewById(R.id.counter);
n.setText("0");
CounterService.RERUN = false;
v.getContext().unregisterReceiver(changeCount);
stopService(intent);
Toast.makeText(getApplicationContext(), "The application stopped counting", Toast.LENGTH_SHORT).show();
}
}
});
}
public void changeCounterText() {
changeCount = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
TextView n = findViewById(R.id.counter);
counter = intent.getIntExtra("counterValue", 0);
System.out.println("************************ RECEIVED!!!! value of: " + counter);
n.setText("" + counter);
}
};
filter = new IntentFilter();
filter.addAction("com.inc.count");
this.registerReceiver(changeCount, filter);
}
#Override
protected void onDestroy() {
super.onDestroy();
unregisterReceiver(changeCount);
assignValuesOnDestroy();
System.out.println("**************************** onDestroy()");
}
public void assignValuesOnCreate() {
Switch s = findViewById(R.id.switchCounter);
if (getSwitchValueFromSP() == 1) s.setChecked(true);
else s.setChecked(false);
Intent f = new Intent();
f.setAction("send.counter.to.phonecounteractivity");
sendBroadcast(f);
}
public void assignValuesOnDestroy() {
SharedPreferences SP = getSharedPreferences("data", MODE_PRIVATE);
SharedPreferences.Editor edit = SP.edit();
Switch s = findViewById(R.id.switchCounter);
if (s.isChecked()) edit.putInt("switch", 1);
else edit.putInt("switch", 0);
edit.apply();
}
public int getSwitchValueFromSP() {
SharedPreferences SP = getSharedPreferences("data", MODE_PRIVATE);
int isOn = SP.getInt("switch", 0);
return isOn;
}
}
Sample of the activity

Call another Activity in Main Activity

sorry my question is may be very simple for all of you. But I am new and need solution for it. If you can help me for solve it.
I have one quote application which have function for check new quote from server in main activity, its checking with server on loading Main Activity that there new quotes available or not and if available its opening one popup window for go setting activity for download new quotes, and if user press setting button than its taking user to setting activity. I need some changes in it. I want automatic download new quotes from main activity without go setting activity. both activity are like below
Thanks
public class MainActivity extends Activity {
SharedPreferences mSharedPreferences;
//String qotdId;
private AdView mAdView;
private InterstitialAd mInterstitial;
public static boolean active;
DAO db;
String siteUrl, updatesUrl;
int lastAuthor, lastQuote;
private ConnectionDetector cd;
#Override
protected void onStart() {
mInterstitial = new InterstitialAd(this);
mInterstitial.setAdUnitId(getResources().getString(R.string.admob_publisher_interstitial_id));
mInterstitial.loadAd(new AdRequest.Builder().build());
super.onStart();
active = true;
}
#Override
protected void onStop() {
super.onStop();
active = false;
}
// ==============================================================================
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_main);
mAdView = (AdView) findViewById(R.id.adView);
mAdView.loadAd(new AdRequest.Builder().build());
/* Boolean isFirstRun = getSharedPreferences("PREFERENCE", MODE_PRIVATE)
.getBoolean("isFirstRun", true);
if (isFirstRun) {
//show start activity
startActivity(new Intent(MainActivity.this, SettingsActivity.class));
Toast.makeText(MainActivity.this, "Please Push Download Button And Save Status in Your Mobile For Just One Time", Toast.LENGTH_LONG)
.show();
}
getSharedPreferences("PREFERENCE", MODE_PRIVATE).edit()
.putBoolean("isFirstRun", false).commit();
*/
// Parse push notification
Parse.initialize(this, getString(R.string.parse_application_id), getString(R.string.parse_client_key));
ParseAnalytics.trackAppOpened(getIntent());
PushService.setDefaultPushCallback(this, MainActivity.class);
ParseInstallation.getCurrentInstallation().saveInBackground();
db = new DAO(this);
db.open();
cd = new ConnectionDetector(MainActivity.this);
siteUrl = getResources().getString(R.string.siteUrl);
updatesUrl = siteUrl + "site/get_updates/" + String.valueOf(lastAuthor) + "/" + String.valueOf(lastQuote);
if (cd.isConnectingToInternet()) {
// Internet Connection is not present
Intent checkUpdates = new Intent(MainActivity.this, CheckUpdatesService.class);
startService(checkUpdates);
}
// generateKeyHash();
final ImageButton quotes = (ImageButton) findViewById(R.id.quotes);
quotes.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,
QuotesActivity.class);
intent.putExtra("quotesType", 1);
intent.putExtra("itemSelected", 0);
startActivity(intent);
}
});
final ImageButton authors = (ImageButton) findViewById(R.id.authors);
authors.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,
AuthorsActivity.class);
startActivity(intent);
}
});
final ImageButton favorites = (ImageButton) findViewById(R.id.favorites);
favorites.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,
QuotesActivity.class);
intent.putExtra("quotesType", 2);
startActivity(intent);
}
});
final ImageButton settings = (ImageButton) findViewById(R.id.settings);
settings.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,
SettingsActivity.class);
startActivity(intent);
}
});
}
}
And my other activity
public class SettingsActivity extends PreferenceActivity {
static final int TIME_DIALOG_ID = 999;
private AdView mAdView;
private InterstitialAd mInterstitial;
private static final String MY_PREFERENCES = "my_preferences";
#Override
protected void onStart() {
mInterstitial = new InterstitialAd(this);
mInterstitial.setAdUnitId(getResources().getString(R.string.admob_publisher_interstitial_id));
mInterstitial.loadAd(new AdRequest.Builder().build());
super.onStart();
}
#Override
protected void onStop() {
//unregisterReceiver(receiver);
super.onStop();
}
// ==========================================================================================================//
DAO db;
// Progress dialog
ProgressDialog pDialog;
PreferenceScreen preferenceScreen;
private static SharedPreferences mSharedPreferences;
UpdateClass update;
// Internet Connection detector
private ConnectionDetector cd;
// Alert Dialog Manager
AlertDialogManager alert = new AlertDialogManager();
Preference more, rate, about, check, share,status,background, progress = null;
PreferenceCategory socialsCategory;
private MyDownloadReceiver receiver;
// ==============================================================================
//////////////////// First Load /////////////////
public static boolean isFirst(Context context){
final SharedPreferences reader = context.getSharedPreferences(MY_PREFERENCES, Context.MODE_PRIVATE);
final boolean first = reader.getBoolean("is_first", true);
if(first){
final SharedPreferences.Editor editor = reader.edit();
editor.putBoolean("is_first", false);
editor.commit();
}
return first;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.config);
mAdView = (AdView) findViewById(R.id.adView);
mAdView.loadAd(new AdRequest.Builder().build());
//TWITTER_CONSUMER_KEY = getResources().getString(
// R.string.TWITTER_CONSUMER_KEY);
//TWITTER_CONSUMER_SECRET = getResources().getString(
// R.string.TWITTER_CONSUMER_SECRET);
//TWITTER_CALLBACK_URL = "oauth://"
// + getApplicationContext().getPackageName()
// + ".SettingsActivity";
//uiHelper = new UiLifecycleHelper(this, callback);
//uiHelper.onCreate(savedInstanceState);
db = new DAO(this);
db.open();
addPreferencesFromResource(R.layout.settings);
// Shared Preferences
mSharedPreferences = getApplicationContext().getSharedPreferences(
"MyPref", 0);
check = (Preference) findPreference("check");
about = (Preference) findPreference("about");
more = (Preference) findPreference("more");
rate = (Preference) findPreference("rate");
status = (Preference) findPreference("status");
share = (Preference) findPreference("share");
background = (Preference) findPreference("background");
socialsCategory = (PreferenceCategory) findPreference("socials");
preferenceScreen = getPreferenceScreen();
check.setOnPreferenceClickListener(new OnPreferenceClickListener() {
public boolean onPreferenceClick(Preference preference) {
update = new UpdateClass(SettingsActivity.this);
update.handleUpdates();
//if (mInterstitial.isLoaded()) {
// mInterstitial.show();
//}
return false;
}
});
// ==============================================================================
about.setOnPreferenceClickListener(new OnPreferenceClickListener() {
public boolean onPreferenceClick(Preference preference) {
Intent intent = new Intent(SettingsActivity.this,
AboutActivity.class);
startActivity(intent);
if (mInterstitial.isLoaded()) {
mInterstitial.show();
}
return false;
}
});
// ==============================================================================
background
.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
public boolean onPreferenceChange(Preference preference,
Object newValue) {
if (newValue.equals(true)) {
db.updateSetting("background", "1");
} else {
db.updateSetting("background", "0");
}
return true;
}
});
// ==============================================================================
// ==============================================================================
rate.setOnPreferenceClickListener(new OnPreferenceClickListener() {
#Override
public boolean onPreferenceClick(Preference preference) {
final String appPackageName = "com.karopass.hindishayari2016";
try {startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id="+ appPackageName)));
} catch (android.content.ActivityNotFoundException anfe) {
startActivity(new Intent(Intent.ACTION_VIEW,Uri.parse("http://play.google.com/store/apps/details?id="+ appPackageName)));
}
return true;
}
});
// ==============================================================================
more.setOnPreferenceClickListener(new OnPreferenceClickListener() {
#Override
public boolean onPreferenceClick(Preference preference) {
final String developerName = "karopass";
try {startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("market://search?q="+ developerName)));
} catch (android.content.ActivityNotFoundException anfe) {
startActivity(new Intent(Intent.ACTION_VIEW,Uri.parse("https://play.google.com/store/search?q="+ developerName)));
}
return true;
}
});
share.setOnPreferenceClickListener(new OnPreferenceClickListener() {
public boolean onPreferenceClick(Preference preference) {
Intent sharingIntent = new Intent(android.content.Intent.ACTION_SEND);
sharingIntent.setType("text/plain");
String shareBody = "आज ही डाउनलोड करे हिंदी शायरी एप्लीकेशन और पाइए बेस्ट हिंदी शायरी.इस एप्लीकेशन में 3000 से भी ज्यादा बढ़िया हिंदी शायरी का कलेक्शन है जिसे आप पढने या शेर करने के लिए यूज कर सकते है !! आज ही डाउनलोड करे !! http://play.google.com/store/apps/details?id=com.karopass.hindishayari2016";
sharingIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, " ");
sharingIntent.putExtra(android.content.Intent.EXTRA_TEXT, shareBody);
startActivity(Intent.createChooser(sharingIntent, "Share via"));
return false;
}
});
// ==============================================================================
status.setOnPreferenceClickListener(new OnPreferenceClickListener() {
#Override
public boolean onPreferenceClick(Preference preference) {
final String appPackageName = "com.karopass.hindi_status_2016";
try {startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id="+ appPackageName)));
} catch (android.content.ActivityNotFoundException anfe) {
startActivity(new Intent(Intent.ACTION_VIEW,Uri.parse("http://play.google.com/store/apps/details?id="+ appPackageName)));
}
return true;
}
});
// ==============================================================================
IntentFilter filter = new IntentFilter(MyDownloadReceiver.ACTION);
filter.addCategory(Intent.CATEGORY_DEFAULT);
receiver = new MyDownloadReceiver();
registerReceiver(receiver, filter);
}
void showProgressBar() {
progress = new MyProgressBarPreference(this);
preferenceScreen.addPreference(progress);
}
void setDownloadProgress(int percent) {
if (progress != null) {
((MyProgressBarPreference)progress).setProgress(percent);
((MyProgressBarPreference)progress).setLabel("Please wait... " +percent + "%"+" Downloading Done");
}
}
void hideProgressBar()
{
if (progress != null)
preferenceScreen.removePreference(progress);
}
public class MyDownloadReceiver extends BroadcastReceiver {
public static final String ACTION = "com.karopass.hindishayari2016.intent.action.DOWNLOAD";
public static final int INITIALIZE = 0x001;
public static final int DOWNLOAD = 0x002;
public static final int FINISH = 0x003;
public static final String EXTRA_STATUS = "status";
public static final String EXTRA_PERCENT = "percent";
#Override
public void onReceive(Context context, Intent intent) {
int status = intent.getIntExtra(EXTRA_STATUS, -1);
Log.d("DESOLF", "receive broadcast : " + status);
switch(status) {
case INITIALIZE:
showProgressBar();
break;
case DOWNLOAD:
int percent = intent.getIntExtra(MyDownloadReceiver.EXTRA_PERCENT, 0);
setDownloadProgress(percent);
break;
case FINISH:
hideProgressBar();
//Toast.makeText(SettingsActivity.this, "Downloaded successfully", Toast.LENGTH_LONG).show();
if (mInterstitial.isLoaded()) {
mInterstitial.show();
}
break;
default:
}
}
}
public class MyProgressBarPreference extends Preference {
public MyProgressBarPreference(Context context) {
super(context);
}
public MyProgressBarPreference(Context context, AttributeSet attrs) {
super(context, attrs);
}
public MyProgressBarPreference(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
private ImageView mStatusIcon;
private ProgressBar mProgressBar;
private TextView mStatusText ;
private int lastReqProgress=-1;
private int lastReqMax=-1;
private String lastLabel;
#Override
protected View onCreateView(ViewGroup parent) {
LayoutInflater li = (LayoutInflater) getSystemService(Service.LAYOUT_INFLATER_SERVICE);
View myLayout=li.inflate(R.layout.download_progress, null, false);
RotateAnimation anim = new RotateAnimation(0.0f, 360.0f,
Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF,
0.5f);
anim.setInterpolator(new LinearInterpolator());
anim.setRepeatCount(Animation.INFINITE);
anim.setDuration(700);
mStatusIcon = (ImageView) myLayout.findViewById(R.id.status_icon);
mStatusIcon.startAnimation(anim);
mProgressBar=(ProgressBar) myLayout.findViewById(R.id.status_progress);
mStatusText=(TextView) myLayout.findViewById(R.id.status_text);
mStatusIcon.setImageResource(R.drawable.rotate);
mProgressBar.setProgress(0);
mStatusText.setText(0 + "%");
return myLayout;
}
public void setIcon(int resId) {
mStatusIcon.setImageResource(resId);
}
public void setProgress(int value){
if (mProgressBar!=null){
mProgressBar.setProgress(value);
} else {
lastReqProgress=value;
}
}
public void setMax(int value){
if (mProgressBar!=null){
int savedprogress=mProgressBar.getProgress();
mProgressBar.setMax(0);
mProgressBar.setMax(value);
mProgressBar.setProgress(savedprogress);
} else {
lastReqMax=value;
}
}
public void setLabel(String text){
if (lastLabel!=null){
mStatusText.setText(text);
} else {
lastLabel=text;
}
}
}
}

You can try this code:
Intent i = new Intent(MainActivity.this, SecondActivity.class);
startActivity(i);
Don't forget to add your Second Activity in the AndroidManifest.xml:
<activity android:label="#string/app_name" android:name="SecondActivity"/>
Android Page

updating shared prefrences in android

well i'm just testing the idea of shared preferences to save the user progress, but this simple code is not working, when i pass lev1 it should update preffile so that at next app start it should opens directly to lev2Activity, everything is ok even log cat is clean but nothing happens, i don't know whats wrong with my code, any help will be appreciated.
MainActivity.java
private Button b1;
public static final String levstate= "levstate";
private Context mycontext;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mycontext= this;
b1= (Button) findViewById(R.id.b1);
b1.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v) {
MainActivity.savelevstate(1, mycontext);
Intent i= new Intent(MainActivity.this, Lev1Activity.class);
startActivity(i);
}
});
}
public static void savelevstate(int state, Context mycontext)
{
SharedPreferences pref= mycontext.getSharedPreferences("preffile", MODE_APPEND);
Editor editor= pref.edit();
editor.putInt("levstate", state);
editor.commit();
}
public static int getlevstate(Context mycontext)
{
SharedPreferences pref= mycontext.getSharedPreferences("preffile", MODE_APPEND);
int state= pref.getInt("levstate", 1);
return state;
}
Lev1Activity.java
private EditText et1;
private Button b1;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_lev1);
et1= (EditText) findViewById(R.id.et1);
b1= (Button) findViewById(R.id.b1);
}
public void Next (View v)
{
String value= et1.getText().toString();
int finalvalue= Integer.parseInt(value);
if(finalvalue==22)
{
Intent i = new Intent (this, Lev2Activity.class);
startActivity(i);
MainActivity.savelevstate(2, this);
this.finish();
}
}

Your idea of using sharedPreferences is excellent. However, if you look at your MainActivity's onCreate(), you can see that you never check the last level state before starting the intent. The app runs, the user clicks on button "b1" and it immediately starts Lev1Activity. Assuming you want the correct level to start when the user presses that same button, you'd have to check for the current level state and then link that state to its appropriate level Activity.
For example (MainActivity.java):
b1.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v) {
Intent i;
switch(getlevstate(myContext)) {
case 1:
i = new Intent(myContext, Lev1Activity.class);
break;
case 2:
i = new Intent(myContext, Lev2Activity.class);
break;
case 3:
i = new Intent(myContext, Lev3Activity.class);
break;
case 4
i = new Intent(myContext, Lev4Activity.class);
break;
...
}
startActivity(i);
}
});
Using MODE_APPEND should work as well as using MODE_PRIVATE, however it is recommended to use the latter.

I would recommend to you to create a new class for working with SharedPreferences.
Here is a example for saving and retrieving data from shared preferences:
public class SharedPreferenceSettings {
private static final String PREFS_NAME = "MY_APP_SETTINGS";
private static final String PREFS_LANGUAGE = "LANGUAGE";
private static final String PREFS_CITY = "CITY";
private final SharedPreferences settings;
public SharedPreferenceSettings(Context context) {
settings = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
}
public void setLanguage(String language) {
settings.edit().putString(PREFS_LANGUAGE, language).apply();
}
public String getlanguage() {
return settings.getString(PREFS_LANGUAGE, "english");
}
public void setCity(String city) {
settings.edit().putString(PREFS_CITY, city).apply();
}
public String getCity() {
return settings.getString(PREFS_CITY, "london");
}
}
For more info, check official Android documentation - link

You are only saving the states, but you aren't checking it anywhere in the code.
In MainActivity try this :
b1.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v) {
if(getlevstate(MainActivity.this)==2) {
Intent i= new Intent(MainActivity.this, Lev2Activity.class);
startActivity(i);
} else {
MainActivity.savelevstate(1, mycontext);
Intent i= new Intent(MainActivity.this, Lev1Activity.class);
startActivity(i);
}
}
});

Not sure this is the problem, but when I use Preferences I use Context.MODE_PRIVATE this is the only difference between my code and yours, maybe it will help!
Edit : I might be wrong, but I don't see anywhere the call to getlevstate. After setting this
et1= (EditText) findViewById(R.id.et1);
You shoud do somehing like this :
et1.setText(""+getlevstate(this))