Develop Reference

Android. Intent.ACTION CAMERA BUTTON is not working

Learning broadcast messages. The book DN Kolisnichenko - "Programming for Android" is an example of where the camera at the touch of a button starts the service. But I have it che does not work. What is the problem? Or I do not know what is the camera button (physical or on the display), or do not understand what is wrong. Here is the code of the example:
MainActivity.java
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.content.Intent;
import android.content.IntentFilter;
public class MainActivity extends AppCompatActivity {
MyReceiver iReceiver = new MyReceiver();
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
IntentFilter iFilter = new IntentFilter(Intent.ACTION_CAMERA_BUTTON);
iFilter.addAction(Intent.ACTION_CAMERA_BUTTON);
registerReceiver(iReceiver, iFilter);
}
#Override
protected void onDestroy() {
unregisterReceiver(iReceiver);
super.onDestroy();
}
}
MyReceiver.java
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;
public class MyReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context rcvContext, Intent rcvIntent) {
String action = rcvIntent.getAction();
if (action.equals(Intent.ACTION_CAMERA_BUTTON)) {
rcvContext.startService(new Intent(rcvContext,
MyService.class));
}
}
}
MyService.java
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.widget.Toast;
public class MyService extends Service {
#Override
public IBinder onBind(Intent arg0) {
return null;
}
#Override
public void onCreate() {
super.onCreate();
Toast.makeText(this,"Service started...",
Toast.LENGTH_LONG).show();
}
#Override
public void onDestroy() {
super.onDestroy();
Toast.makeText(this, "Service destroyed...",
Toast.LENGTH_LONG).show();
}
}
And manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.ivarious.myapplication">
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<application
android:allowBackup="true"
android:icon="#mipmap/ic_launcher"
android:label="#string/app_name"
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" />
<action android:name="android.intent.action.CAMERA_BUTTON" />
</intent-filter>
</activity>
<receiver android:name=".MyReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.CAMERA_BUTTON" />
</intent-filter>
<service android:name=".MyService"></service>
<action android:name="android.intent.action.CAMERA_BUTTON" />
<action android:name="android.intent.extra.KEY_EVENT" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
</receiver>
</application>
</manifest>

Make Sure You Added The Camera Permission to your Manifest
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />

Why app not launching on booting android device?

I am testing the following app on HTC with Android 2.3.5. For some reason app is not launching on restarting or booting the phone.
I need to know where am I wrong exactly?
BootReciever.java
import android.os.Bundle;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.view.Menu;
import android.widget.Toast;
public class BootupReceiver extends BroadcastReceiver {
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "App started", Toast.LENGTH_LONG).show();
/*
Intent startActivityIntent = new Intent(context, MainActivity.class);
startActivityIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(startActivityIntent);
*/
// context.startActivity(new Intent(context, MainActivity.class));
}
}
MainActivity.java
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.view.Menu;
import android.content.BroadcastReceiver;
import android.widget.Toast;
import android.content.Intent;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
Android Manifest File:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.androidbootreciever"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.example.hello_android_world.MainActivity"
android:label="#string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
</intent-filter>
</activity>
<receiver android:name="com.example.androidbootreciever.BootupReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver>
</application>
</manifest>
The code is working on restart but not on turning on the phone after shutting it down. Here are the messages that I receive in my logcat:

You extended BootupReceiver with Activity?
It should be extended with Broadcast Receiver.
public class BootupReceiver extends BroadcastReceiver{
}

Your Receiver:
public class AutoStartBroadcastReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent receivedIntent) {
context.startActivity(new Intent(context, YourActivity.class));
}
}
Your Manifest:
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<receiver android:name="com.example.receiver.AutoStartBroadcastReceiver" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
Good luck!

You need to write following permission,
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
If your application is stored on External storage then you should provide following intent filter,
<receiver android:name=".BootupReceiver">
<intent-filter>
<action android:name="android.intent.action.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver>
See App Install Location.

start my service on phone restart in android

I am making app which tracks user location continuously, so far i have been able to make a successful receiving of its ordinate on location change, but if he is restarting the phone than i am not able to start my service without user again opening the app.
Manifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.aa.gpsdemo"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="16" />
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
<uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS"/>
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.aa.gpsdemo.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>
<service android:name=".MyService" android:label="My Service">
<intent-filter>
<action android:name="com.aa.gpsdemo.StartMyServiceAtBootReciever" />
</intent-filter>
</service>
<receiver
android:name=".receiver.StartMyServiceAtBootReceiver"
android:enabled="true"
android:exported="true"
android:label="StartMyServiceAtBootReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
</application>
</manifest>
StartMyServiceAtBootReciever.java
package com.aa.gpsdemo;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
public class StartMyServiceAtBootReciever extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
if ("android.intent.action.BOOT_COMPLETED".equals(intent.getAction())) {
Intent serviceIntent = new Intent("com.aa.gpsdemo.BackgroundService");
context.startService(serviceIntent);
}
}
}
BackgroundService.java
package com.aa.gpsdemo;
import android.app.Service;
import android.content.Intent;
import android.content.Context;
import android.os.IBinder;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;
import android.widget.Toast;
import android.location.Criteria;
public class BackgroundService extends Service {
private static NewLocationListener mylistner=null;
private final static String TAG = "MainActivity";
private Context context = null;
#Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
if (android.os.Build.VERSION.SDK_INT > 9) {
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
}
mylistner = new NewLocationListener(context);
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setPowerRequirement(Criteria.POWER_MEDIUM);
criteria.setCostAllowed(true);
LocationManager locManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
String bestProvider=locManager.getBestProvider(criteria, true);
locManager.requestLocationUpdates(bestProvider,1000, 5, mylistner);
}
}
where i am going wrong any help would be highly appreciated on restart of a phone i get demoapp has stopped i tried putting toast on reciever but that toast also are not coming at present

Make Sure u have the permission in AndroidManifest File :
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
Change this to :
#Override
public void onReceive(Context context, Intent intent) {
Intent serviceIntent = new Intent(context,BackgroundService.class);
startService(serviceIntent);
}

RECEIVE_BOOT_COMPLETED: Broadcast Action: This is broadcast once, after the system has finished booting. It can be used to perform application-specific initialization, such as installing alarms. You must hold the RECEIVE_BOOT_COMPLETED permission in order to receive this broadcast.
Refrence
Stackoverflow Question

Android boot start app on boot from BroadcastReceiver with multiple services

I need to start 2 services on bootcompleted. The first service starts correctly, but second service seems is not starting.
I don't know if I have to create two BroadcastReceiver or it's enough with one.
Here is my code. I've put the two services in one BroadcastReceiver. Please, can you tell me what I'm doing wrong?
Thank you in advance
AndroidManifest.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.pruebas.appservicelocator"
android:versionCode="1"
android:versionName="1.0"
android:installLocation="internalOnly" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="16" />
<!-- Startup service -->
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<!-- GPS -->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<!-- UUID -->
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<!-- Acceso a web service -->
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<application
android:allowBackup="true"
android:icon="#drawable/ic_launcher"
android:label="#string/app_name"
android:theme="#style/AppTheme" >
<activity
android:name="com.pruebas.appservicelocator.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>
<service android:name=".Servicio">
<intent-filter>
<action android:name="com.pruebas.appservicelocator.Servicio"/>
</intent-filter>
</service>
<service android:name=".ServicioBD">
<intent-filter>
<action android:name="com.pruebas.appservicelocator.ServicioBD"/>
</intent-filter>
</service>
<receiver android:name=".Recibidor" android:enabled="true" android:exported="true">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"/>
<category android:name="android.intent.category.DEFAULT"/>
</intent-filter>
</receiver>
</application>
</manifest>
Recibidor.java:
package com.pruebas.appservicelocator;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.widget.Toast;
public class Recibidor extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
android.os.Debug.waitForDebugger();
Toast.makeText(context, "Iniciando Recibidor", Toast.LENGTH_LONG).show();
final String TAG = "Recibidor";
Log.i(TAG, "Iniciando Recibidor");
if (intent.getAction().equalsIgnoreCase("android.intent.action.BOOT_COMPLETED")) {
Toast.makeText(context, "Iniciando Intent", Toast.LENGTH_LONG).show();
Log.i(TAG, "Iniciando Intent");
Intent servicio = new Intent();
servicio.setAction("com.pruebas.appservicelocator.Servicio");
context.startService(servicio);
Intent servicioBD = new Intent();
servicio.setAction("com.pruebas.appservicelocator.ServicioBD");
context.startService(servicioBD);
Log.i(TAG, "Iniciando Servicios");
Toast.makeText(context, "Iniciando Servicio", Toast.LENGTH_LONG).show();
}
}
}
"Servicio" service works fine, so I don't write the code. If you need, please, tell-me and I will write it.
ServicioBD.java:
package com.pruebas.appservicelocator;
import com.pruebas.utils.UsersLocationsDBHelper;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.widget.Toast;
public class ServicioBD extends Service{
private UsersLocationsDBHelper locDBHelper = null;
private static String TAG = "ServicioBD";
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public void onCreate() {
super.onCreate();
Toast.makeText(this, "SERVICIOBD ON CREATE", Toast.LENGTH_LONG).show();
}
#Override
public void onDestroy() {
super.onDestroy();
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
startForeground(0, null);
Toast.makeText(this, "SERVICIOBD ON START COMMAND", Toast.LENGTH_LONG).show();
return START_STICKY;
}
}

I've found the error.
Intent servicio = new Intent();
servicio.setAction("com.pruebas.appservicelocator.Servicio");
context.startService(servicio);
Intent servicioBD = new Intent();
servicio.setAction("com.pruebas.appservicelocator.ServicioBD");
context.startService(servicioBD);
Has to be
Intent servicio = new Intent();
servicio.setAction("com.pruebas.appservicelocator.Servicio");
context.startService(servicio);
Intent servicioBD = new Intent();
servicioBD.setAction("com.pruebas.appservicelocator.ServicioBD");
context.startService(servicioBD);

Android checking Wifi on every onRestart

I want my app to check whether the device is connecting to a specific Wifi and auto connect to the Wifi whenever the app is navigated to. I know that I can do it in onRestart(). But it only handles one activity's state.
My question is if there any method to handle the state of the app instead of adding onRestart() on every activity to do what i want?

try the following code:
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
public class AutostartService extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
System.out.println("in broad....");
ConnectivityManager manager = (ConnectivityManager)context.getSystemService(context.CONNECTIVITY_SERVICE);
boolean is3g = manager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).isConnectedOrConnecting();
boolean isWifi = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).isConnectedOrConnecting();
if(!is3g && !isWifi){
}else{
if ((intent.getAction() != null) && (intent.getAction().equals("android.intent.action.BOOT_COMPLETED")))
{
System.out.println("in broadcast receiver.....");
Intent i = new Intent(context, Splash.class);
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);
}
}
}
}
dont forget to add this in your manifest file:
<receiver android:name=".AutostartService" android:enabled="true" android:exported="true">
- <intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver>
and the following permissions in manifest file:
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />