Follow the step the make it done 1. Create a java class and name `UnlockReceiver.java` whatever you want :) 2. Add the following `UnlockReceiver.java` code in your whatever java class 3. Register your receiver in your manifest file by adding following lines ```java <receiver android:name=".textonphoto.AdsControler.UnlockReceiver.java" android:en…

Manifest.xml

        <receiver
            android:name=".textonphoto.AdsControler.UnlockReceiver.java"
            android:enabled="true">
            <intent-filter>
                <action android:name="android.intent.action.BOOT_COMPLETED" />
                <action android:name="android.intent.action.SCREEN_OFF" />
                <action android:name="android.intent.action.SCREEN_ON" />
                <action android:name="android.intent.action.USER_PRESENT" />
                <category android:name="android.intent.category.DEFAULT"></category>
            </intent-filter>
        </receiver>

UnlockReceiver.java

package com.dluxtools.photext.textonphoto.AdsControler;

import android.app.KeyguardManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.nfc.Tag;
import android.os.Build;
import android.os.Handler;
import android.os.PowerManager;
import android.util.Log;

import com.google.android.gms.ads.AdListener;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.InterstitialAd;
import com.google.android.gms.ads.MobileAds;

public class UnlockReceiver extends BroadcastReceiver {

    Context context=null;
    final static String TAG = "Receiver";
    private InterstitialAd mInterstitialAd;

    @Override
    public void onReceive(Context context, Intent intent) {
        this.context=context;
        Log.i(TAG, "onReceive: " + intent.getAction());
        mInterstitialAd = new InterstitialAd(context);
        mInterstitialAd.setAdUnitId("ca-app-pub-2351400565905544/6243970224");
        mInterstitialAd.loadAd(new AdRequest.Builder().build());

        showAdd();

        mInterstitialAd.setAdListener(new AdListener() {
            @Override
            public void onAdClosed() {
                mInterstitialAd.loadAd(new AdRequest.Builder().build());
            }

            @Override
            public void onAdFailedToLoad(int i) {
                mInterstitialAd.loadAd(new AdRequest.Builder().build());
            }
        });

        isDeviceLocked(context);
        if(!isDeviceLocked(context)){
            Log.i(TAG, "onReceive: " + intent.getAction());
        }
    }

    void showAdd(){
        Handler handler = new Handler();
        Runnable runnable = new Runnable() {
            @Override
            public void run() {
                if (mInterstitialAd.isLoaded()) {
                    mInterstitialAd.show();
                } else {
                    mInterstitialAd.loadAd(new AdRequest.Builder().build());
                }
            }
        };
        handler.postDelayed(runnable,5000);
    }

    public static boolean isDeviceLocked(Context context) {
        boolean isLocked = false;

        // First we check the locked state
        KeyguardManager keyguardManager = (KeyguardManager) context.getSystemService(Context.KEYGUARD_SERVICE);
        boolean inKeyguardRestrictedInputMode = keyguardManager.inKeyguardRestrictedInputMode();

        if (inKeyguardRestrictedInputMode) {
            isLocked = true;

        } else {
            // If password is not set in the settings, the inKeyguardRestrictedInputMode() returns false,
            // so we need to check if screen on for this case

            PowerManager powerManager = (PowerManager)context.getSystemService(Context.POWER_SERVICE);
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT_WATCH) {
                isLocked = !powerManager.isInteractive();
            } else {
                //noinspection deprecation
                isLocked = !powerManager.isScreenOn();
            }
        }
        Log.i(TAG,String.format("Now device is %s.", isLocked ? "locked" : "unlocked"));
        return isLocked;
    }
}