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App Service not starting when phone boots up

I have made a simple service in android studio which should start as soon as I boot the phone. It should display atleast a TOAST Message. I am using Redmi note 4 as emulator and the service is not starting when I boot or reboot the phone. I have set the app to autostart also in settings.
Android Manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.dilip3.myapplication" >
<!-- Permission for starting app on boot -->
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme" >
<activity android:name=".MainActivity" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<!-- Service required starting app on boot -->
<service android:name=".MyService" android:label="My Service">
<intent-filter>
<action android:name="com.myapp.MyService" />
</intent-filter>
</service>
<receiver
android:enabled="true"
android:name=".BootService"
android:exported="true"
android:permission="android.permission.RECEIVE_BOOT_COMPLETED">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.REBOOT"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</receiver>
</application>
</manifest>
BootService.java
package com.example.dilip3.myapplication;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;
public class BootService extends BroadcastReceiver{
#Override
public void onReceive(Context context, Intent intent) {
if(intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED)){
Toast.makeText(context, "Boot Completed", Toast.LENGTH_SHORT).show();
Intent serviceIntent = new Intent(context, MyService.class);
context.startActivity(serviceIntent);
}
}
}
MyService.java
package com.example.dilip3.myapplication;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.support.annotation.Nullable;
import android.widget.Toast;
public class MyService extends Service {
#Nullable
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
Toast.makeText(this, "service starting", Toast.LENGTH_LONG).show();
return super.onStartCommand(intent,flags,startId);
}
}
MainActivity.java has no changes.
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}

You need to start a service, not an activity.
From
context.startActivity(serviceIntent);
To
context.startService(serviceIntent);

Splashscreen and Intents

I'm developing this android application, that receives data from the gallery (in my case an image) and displays it. What i also had to do is to create a SplashScreen for my app. But when i did my intent became null .
Manifest code:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.xkbc1923.myapplication">
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".SplashScreen">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".AlertExampleActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.SEND" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="image/*" />
<data android:mimeType="text/*" />
</intent-filter>
</activity>
</application>
SplashScreen
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
public class SplashScreen extends Activity {
private static final int DISPLAY_DURATION = 1000;
#Override
protected final void onCreate(final Bundle savedInstState) {
super.onCreate(savedInstState);
setContentView(R.layout.activity_splashscreen);
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
Intent i = new Intent(SplashScreen.this, AlertExampleActivity.class);
startActivity(i);
// close this activity
finish();
}
}, DISPLAY_DURATION);
}
}
MainActivity
import android.app.Dialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import java.io.File;
import static android.provider.CalendarContract.CalendarCache.URI;
public class AlertExampleActivity extends AppCompatActivity {
ImageView picView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
///get the image view
//get the text view
setContentView(R.layout.activity_alert_example);
picView = (ImageView) findViewById(R.id.picture);
TextView txtView = (TextView) findViewById(R.id.txt);
if (txtView ==null) {
Log.w("Example", "TextView is null");
}
//get the received intent
Intent receivedIntent = getIntent();
//get the action
String receivedAction = receivedIntent.getAction();
//find out what we are dealing with
String receivedType = receivedIntent.getType();
//make sure it's an action and type we can handle
if (receivedAction.equals(Intent.ACTION_SEND)) {
Log.d("Example", "Send received");
//content is being shared
if (receivedType.startsWith("text/")) {
Log.d("Example", "Text received");
//handle sent text
//hide the other ui item
picView.setVisibility(View.GONE);
//get the received text
String receivedText = receivedIntent.getStringExtra(Intent.EXTRA_TEXT);
//check we have a string
if (receivedText != null) {
//set the text
txtView.setText(receivedText);
}
} else if (receivedType.startsWith("image/")) {
Log.d("Example", "Image received");
//handle sent image
handleSendImage(receivedIntent);
}
} else if (receivedAction.equals(Intent.ACTION_MAIN)) {
//app has been launched directly, not from share list
Log.d("Example", "Direct launch of App");
}
}
private void handleSendImage(Intent intent) {
// Get the image URI from intent
Uri imageUri = (Uri) intent.getParcelableExtra(Intent.EXTRA_STREAM);
// When image URI is not null
if (imageUri != null) {
// Update UI to reflect image being shared
picView.setImageURI(imageUri);
} else{
Toast.makeText(this, "Error occured, URI is invalid", Toast.LENGTH_LONG).show();
}
}
}

You did not add any extra data to your intent. So it would be null normally. Just add necessary data to Intent (i) on SplashScreen.java. Ex -
i.setAction("action");
i.setType("type");
i.putExtra("key", "value");

I am not sure if this gonna solve your problem but you can try.
Instead of :
Intent i = new Intent(SplashScreen.this, AlertExampleActivity.class);
startActivity(i);
// close this activity
finish();
Try this:
startActivity(new Intent(SplashScreen.this, AlertExampleActivity.class));
finish();

I've changed the manifest file since i want the splashscreen to appear even when it's externally called .
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
android:roundIcon="#mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="#style/AppTheme">
<activity android:name=".AlertExampleActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<activity android:name=".SplashScreen">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.SEND" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="image/*" />
<data android:mimeType="text/*" />
</intent-filter>
</activity>
</application>
And changed the SplashscreenActivity :
public class SplashScreen extends Activity {
private static final int DISPLAY_DURATION = 1000;
#Override
protected final void onCreate(final Bundle savedInstState) {
super.onCreate(savedInstState);
setContentView(R.layout.activity_splashscreen);
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
Intent i = new Intent(SplashScreen.this, AlertExampleActivity.class);
i.setAction(Intent.ACTION_SEND);
i.setType("*/*");
String[] mimetypes = {"image/*", "video/*"};
i.putExtra(Intent.EXTRA_MIME_TYPES, mimetypes);
startActivity(i);
// close this activity
finish();
}
}, DISPLAY_DURATION);
}
}
I haven't changed anything in the MainActivity , but now i no longer receive the image ... I'm new to Android so i would really appreciate the explanation.

Background service doesn't work

I am trying to create an Android app in Android Studio.
The app is mainly a background service to send some information to the server around every 15 seconds or so.
I have created an empty activity, boot receiver and a service class, but it doesn't work.
Could somebody help me, and explain why it doesn't work.
The relevant files:
MainActivity.java
package nl.robinvandervliet.robinsapp.app;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
public class MainActivity extends ActionBarActivity
{
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
finish();
}
}
BootReceiver.java
package nl.robinvandervliet.robinsapp.app;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
public class BootReceiver extends BroadcastReceiver
{
#Override
public void onReceive(Context context, Intent intent)
{
context.startService(new Intent(context, RobinsService.class));
}
}
RobinsService.java
package nl.robinvandervliet.robinsapp.app;
import android.app.Notification;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.widget.Toast;
public class RobinsService extends Service
{
private Runnable runnable = new Runnable()
{
#Override
public void run()
{
//Opening connection to the server.
while (true)
{
//Sending some data to the server.
//Sleeping for around 15 seconds.
}
//Dead code, should never reach this place.
}
};
public IBinder onBind(Intent intent)
{
return null;
}
#Override
public void onCreate()
{
new Thread(runnable).start();
Notification notification = new Notification.Builder(getApplicationContext()).setContentTitle("MyService is running!").setContentTitle("(more information later)").build();
startForeground(1, notification);
Toast.makeText(getApplicationContext(), "Service created!", Toast.LENGTH_LONG).show();
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="nl.robinvandervliet.robinsapp.app" >
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="nl.robinvandervliet.robinsapp.app.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name="nl.robinvandervliet.robinsapp.app.BootReceiver" android:enabled="true" android:exported="false">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
<service android:name="nl.robinvandervliet.robinsapp.app.RobinsService" android:exported="false" />
</application>
<uses-permission android:name="android.permission.BATTERY_STATS" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
</manifest>
Thanks, Robin.

Since you haven't implemented some parts yet I assume you just want it to run when you boot your device. Maybe take a look here. Adding an extra action in the manifest might solve your problem.

Intent using thread is not working

I know I already asked this, but I didn't get a sufficient answer. Im trying to start an activity, but the emulator stays on the first activity. Ive tried all ways to do it but it never works. The youtube videos show that it should work but it never does. Is there something missing or is there anything wrong with the following code?
//First Activity:
package com.mtprogramming.magicsquaresgame;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.content.Intent;
public class Opening extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_opening);
Thread timer = new Thread(){
public void run(){
try{
sleep(5000);
} catch (InterruptedException e) {
e.printStackTrace();
}finally{
Intent open = new Intent("com.mtprogramming.magicsquaresgame.MENU");
startActivity(open);
}
}
};
timer.start();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.opening, menu);
return true;
}
}
//Second Activity:
package com.mtprogramming.magicsquaresgame;
import android.app.Activity;
import android.os.Bundle;
//Created by suprav on 7/11/13.
public class Menu extends Activity {
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_menu);
}
}
//Android Manifest:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mtprogramming.magicsquaresgame"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="7"
android:targetSdkVersion="17" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.mtprogramming.magicsquaresgame.Opening"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.mtprogramming.magicsquaresgame.Menu"
android:label="#string/title_activity_menu"
android:parentActivityName="Opening" >
<intent-filter>
<action android:name="com.mtprogramming.magicsquaresgame.MENU"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value="Opening" />
</activity>
</application>
</manifest>

Try this:
Intent open = new Intent(Opening.this, Menu.class);
startActivity(open);

I think i found the issue, seems like metadata property is not being properly used, hences activity its not being started, this is the proper way to use the property:
<activity android:name=".TestActivity" >
<meta-data android:name="android.support.PARENT_ACTIVITY"
android:value=".TestParentActivity">
</meta-data>
</activity>
So, seems like you are missing a dot in "android:value="Opening"
Regards!

Cannot instantiate class error

This is the android manifest:
<uses-sdk
android:minSdkVersion="11"
android:targetSdkVersion="11" />
<application
android:allowBackup="true"
android:icon="#drawable/pic"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.thenewboaton.travis.abc"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name="com.thenewboaton.traivs.splash"
android:label="#string/app_name" >
<intent-filter>
<action android:name="com.thenewboaton.Splash" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>
The Main java class named MainActivity:
import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends Activity {
int counter;
Button add;
Button sub;
TextView display;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.splash);
counter=0;
add=(Button)findViewById(R.id.bAdd);
sub=(Button)findViewById(R.id.bSub);
display=(TextView)findViewById(R.id.tvDisplay);
add.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
counter++;
display.setText("Your total is "+counter);
}
});
sub.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
counter--;
display.setText("Your total is "+counter);
}
});
}//method
}//class
Finally the logcat:
06-17 18:51:51.427: E/AndroidRuntime(358): FATAL EXCEPTION: main
06-17 18:51:51.427: E/AndroidRuntime(358): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.thenewboaton.travis/com.thenewboaton.travis.abc}: java.lang.ClassNotFoundException: com.thenewboaton.travis.abc in loader dalvik.system.PathClassLoader[/data/app/com.thenewboaton.travis-1.apk]
06-17 18:51:51.427: E/AndroidRuntime(358): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1660)
so i tried varying the class names here and there and also the activity name. As soon as the emulator starts the error comes saying the Launcher has failed and the app doesn't start off at all .. i cant remember the EXACT change i did before this error started ..
anyone can help me out on this ?
I'd be glad if anyone can figure this out . thanks :)

You need to point the AndroidManifest at MainActivity:
<activity
android:name=".MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
Or, if you Activity is called abc or splash, and is located in your main package, you can use:
<activity
android:name=".abc"
android:label="#string/app_name" >
...
</activity>
and
<activity
android:name=".splash"
android:label="#string/app_name" >
...
</activity>

Your manifest points to two activities: "abc" and "splash" but your source code is called MainActivity. Either renmae MainActivity to abc or edit the manifest to point to MainActivity instead of abc.