Develop Reference

How to make a screen not fall asleep if the app runs on boot?

I have the app which must start on device' boot. It works well but the problem is that when the app finishes booting, the screen is already dark. How can I make it not fall asleep?
My Receiver:
<receiver
android:enabled="true"
android:exported="true"
android:name=".view.receivers.BootReceiver"
android:permission="android.permission.RECEIVE_BOOT_COMPLETED">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.QUICKBOOT_POWERON" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver>
public class BootReceiver extends BroadcastReceiver {
private final static String LOG_TAG = BootReceiver.class.getSimpleName();
#Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED)) {
Log.i(LOG_TAG, "Loading after booting...");
Intent startCalendarActivityIntent = new Intent(context, CalendarActivity.class);
startCalendarActivityIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(startCalendarActivityIntent);
} else {
Log.e(LOG_TAG, "Error while restarting after boot.");
}
}
}
On this device is Android 6.0 .

You can either use wakelocks, which need certain permissions, or you can put a flag in your onCreate method, which according to the docs does not require a permission.
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
The wakelock documentation gave the example above.

how to run app in background in power on with out show app screen?

with this How do I start my app on startup? post run app when devise power on success
but when devise run this show my main_activity
i want run app in background (Because i call a volley request with timer for check server in background )
my manifest.xml :
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<receiver
android:enabled="true"
android:exported="true"
android:name="other_class.CLASS_START_UP"
android:permission="android.permission.RECEIVE_BOOT_COMPLETED">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<action android:name="android.intent.action.QUICKBOOT_POWERON" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver>
my class start_up :
public class CLASS_START_UP extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED)) {
Intent i = new Intent(context, MainActivity.class);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);
}
}
}
i use this post Run volley request every 5 minutes in background android to run volley request in timer
my timer code is :
private Runnable runnableCode = new Runnable() {
#Override
public void run() {
get_start_info();
// Repeat this the same runnable code block again another 2 seconds
handler.postDelayed(runnableCode, 10000);
}
};
my problem is i dont want when devise turn on show main activity show to user (foreground) i want only run in background
i am sorry i am not good in English language

Try This one
<receiver android:name=".service.ShutdownReceiver"
>
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"/>
<action android:name="android.intent.action.REBOOT"/>
<action android:name="android.intent.action.ACTION_SHUTDOWN" />
<action android:name="android.intent.action.QUICKBOOT_POWERON"/>
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</receiver>
ShutdownReciver.java
public class ShutdownReceiver extends BroadcastReceiver
{
#Override
public void onReceive(Context context, Intent intent)
{
Log.e("Brodcast Call","####");
Toast.makeText(context, "service", Toast.LENGTH_SHORT).show();
// context.startService(new Intent(context,
PowerButtonService.class));
Intent myIntent = new Intent(context, PowerButtonService.class);
myIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(myIntent);
}
}

Priority two apps use bootcompletedReceiver on android

recently I use BOOT_COMPLETED 2 app (A app, and B app)
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"/>
</intent-filter>
A app is activity and B app is service app
when my device boot,
first A app launch and B app launch
so, show B app screen.
I want
first B app launch and A app launch showing A app screen
perhaps, Can I give BOOT_COMPLETED Priority is possible?
finally, I want when I boot my device, show A app screen
Thanks!
add
I try
B app(service)
public class BootCompletedReceiver extends BroadcastReceiver{
#Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED) {
Intent i = new Intent("A app package name.BOOT_COMPLETED");
context.sendBroadcast(i);
}
}
}
<receiver android:name=".BootCompletedReceiver"
android:enabled="true"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"/>
</intent-filter>
</receiver>
A app(activity)
public class BootSendReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context,Intent intent) {
if( intent.getAction().equals("B app packagename.BOOT_COMPLETED"));
Intent i = new Intent (context, MainActivity.class);
context.startActivity(i);
}
}
<receiver android:name=".BootSendReceiver">
<intent-filter>
<action android:name="blackeyeonandroid.iosystem.co.kr.simpleserviceexample.BOOT_COMPLETED"/>
</intent-filter>
</receiver>
and I try boot .. but showing B app screen

I think you can not control that..
Instead, you can make APP1 start the APP2. This way, only APP1 receives the BOOT_COMPLETE message. Then, APP1 is responsible to send a new intent to start APP2:
Maybe, you can do as follows (note that APP2 does not receive android's default BOOT_COMPLETED message):
APP1
Manifest:
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<receiver android:name=".AppToStartFirstBroadcastReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
Receiver
#Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED)) {
Intent i = new Intent("com.example.mytestapp.BOOT_COMPLETED");
context.sendBroadcast(i);
}
}
APP2
Manifest:
<receiver android:name=".AppToStartLaterBroadcastReceiver">
<intent-filter>
<action android:name="com.example.mytestapp.BOOT_COMPLETED" />
</intent-filter>
</receiver>
Receiver
#Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals("com.example.mytestapp.BOOT_COMPLETED")) {
// Do what you want in secundary APP
}
}
Note
This is an suggestion and you should adjust to your case. Since I don't have more details about your code, you may need to modify it to your case.. But you can use the idea.

Open Activity With Dial Code

I want to develop app that doesn't have icon launcher. The app will run alarmscheduler which triggered when app is installed or phone is rebooted.
The problem is how can I open the activity since the app doesn't have intent filter like below:
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
Is there a way to handle dial code such as ##4635*#*# to open the activity ?
or any other solutions are welcomed.

You can do it with two ways:
1) as answer by #KishuDroid
2) By define code in manifest
public class MySecretCodeReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
if(intent.getAction().equals("android.provider.Telephony.SECRET_CODE")) {
Intent i = new Intent(context, MainActivity.class);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);
}
}
}
In manifest file
<receiver android:name=".MySecretCodeReceiver">
<intent-filter>
<action android:name="android.provider.Telephony.SECRET_CODE" />
<data android:scheme="android_secret_code" android:host="4635" />
</intent-filter>
</receiver>
Note:
In Second method you must have to dial *#*#your_code#*#* and dont need to press call button
But in first method you can customise your prefix or postfix of code. For example *#your_code# or **your_code##. but you need to press call button.

You have to use Broadcast Receiver...
public class OutgoingCallReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Bundle bundle = intent.getExtras();
if(null == bundle)
return;
String phonenumber = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);
Log.i("OutgoingCallReceiver",phonenumber);
Log.i("OutgoingCallReceiver",bundle.toString());
if(code.equals("#056700") {
intent.setComponent(new ComponentName("com.example", "com.example.yourActivity"));
And Your Android Manifest
<receiver android:name="com.varma.samples.detectcalls.receivers.OutgoingCallReceiver">
<intent-filter>
<action android:name="android.intent.action.NEW_OUTGOING_CALL"/>
</intent-filter>
</receiver>
Also, include the permission:
<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS"/>

Get newly installed app from BroadcastReceiver:onReceive

Is there has the way I can get newly installed app from BroadcastReceiver onReceive method.
public class PackageAddedReceiver extends BroadcastReceiver {
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "Package Installed: ", Toast.LENGTH_LONG).show();
}
}
I have set the filter as:
<receiver android:name=".receiver.PackageAddedReceiver" android:label="Package added Receiver">
<intent-filter>
<action android:name="android.intent.action.PACKAGE_ADDED" />
<action android:name="android.intent.action.PACKAGE_REMOVED"/>
<data android:scheme="package"/>
</intent-filter>
</receiver>
So what's the best way to get newly installed Package's info?
Thanks.