How to show power off menu on android on the click of a button?

Question

I want to implement a functionality where on the click of a button the menu of android appear which we see on the long tap of power button, and then the user can choose to turn the device off.

I'm talking about this menu

I need it to be without root. There's an app on store which does it without requiring root. https://play.google.com/store/apps/details?id=com.jjo.lockScreenButton

Answer 1

I might be late but this is possible. You have to use an accessibility service for that, which the user must allow access to. Also, keep in mind that accessibility services are meant to help handicapped people and not for this use case.

1. Create a PowerMenuService

public class PowerMenuService extends AccessibilityService {

private BroadcastReceiver powerMenuReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
        if(!performGlobalAction(intent.getIntExtra("action", -1)))
            Toast.makeText(context, "Not supported", Toast.LENGTH_SHORT).show();
    }
};

@Override
public void onAccessibilityEvent(AccessibilityEvent event) {}

@Override
public void onInterrupt() {}

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

    LocalBroadcastManager.getInstance(this).registerReceiver(powerMenuReceiver, new IntentFilter("com.yourapp.ACCESSIBILITY_ACTION"));
}

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

    LocalBroadcastManager.getInstance(this).unregisterReceiver(powerMenuReceiver);
}
}

make sure to replace com.yourapp with your app package

2. Register service in Manifest

Add the following under the <application> tag:

 <service
        android:name=".PowerMenuService"
        android:enabled="true"
        android:exported="true"
        android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE">
        <intent-filter>
            <action android:name="android.accessibilityservice.AccessibilityService" />
        </intent-filter>
        <meta-data android:name="android.accessibilityservice"
            android:resource="@xml/accessibility_service" />
    </service>

3. accessibility_service.xml

In your xml resource directory create a file named accessibility_service.xml which contains the following:

<?xml version="1.0" encoding="utf-8"?>
<accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"
android:packageNames="com.yourapp" />

Again, replace com.yourapp. You should also provide a description. More info here: https://developer.android.com/guide/topics/ui/accessibility/services.html#service-config

4. Show menu

ComponentName component = new ComponentName(getApplicationContext(), PowerMenuService.class);
    getApplicationContext().getPackageManager().setComponentEnabledSetting(component, PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
            PackageManager.DONT_KILL_APP);

    Intent intent = new Intent("com.yourapp.ACCESSIBILITY_ACTION");
    intent.putExtra("action", AccessibilityService.GLOBAL_ACTION_POWER_DIALOG);
    LocalBroadcastManager.getInstance(getApplicationContext()).sendBroadcast(intent);

Taken from: https://github.com/farmerbb/Taskbar