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MyActivity.java

/*
 * Copyright (C) 2013 Google, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.google.android.gms.example.interstitialexample;

import android.os.Bundle;
import android.os.CountDownTimer;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import com.google.android.gms.ads.AdListener;
import com.google.android.gms.ads.doubleclick.PublisherAdRequest;
import com.google.android.gms.ads.doubleclick.PublisherInterstitialAd;

/**
 * Main Activity. Inflates main activity xml.
 */
public class MyActivity extends AppCompatActivity {

private static final long GAME_LENGTH_MILLISECONDS = 3000;

private PublisherInterstitialAd mInterstitialAd;
    private CountDownTimer mCountDownTimer;
    private Button mRetryButton;
    private boolean mGameIsInProgress;
    private boolean mAdIsLoading;
    private long mTimerMilliseconds;

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);

// Create the InterstitialAd and set the adUnitId.
        mInterstitialAd = new PublisherInterstitialAd(this);
        // Defined in res/values/strings.xml
        mInterstitialAd.setAdUnitId(getString(R.string.ad_unit_id));

mInterstitialAd.setAdListener(new AdListener() {
            @Override
            public void onAdClosed() {
                startGame();
            }

@Override
            public void onAdLoaded() {
                mAdIsLoading = false;
            }

@Override
            public void onAdFailedToLoad(int errorCode) {
                mAdIsLoading = false;
            }
        });

// Create the "retry" button, which tries to show an interstitial between game plays.
        mRetryButton = findViewById(R.id.retry_button);
        mRetryButton.setVisibility(View.INVISIBLE);
        mRetryButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                showInterstitial();
            }
        });

startGame();
    }

private void createTimer(final long milliseconds) {
        // Create the game timer, which counts down to the end of the level
        // and shows the "retry" button.
        if (mCountDownTimer != null) {
            mCountDownTimer.cancel();
        }

final TextView textView = findViewById(R.id.timer);

mCountDownTimer = new CountDownTimer(milliseconds, 50) {
            @Override
            public void onTick(long millisUnitFinished) {
                mTimerMilliseconds = millisUnitFinished;
                textView.setText("seconds remaining: " + ((millisUnitFinished / 1000) + 1));
            }

@Override
            public void onFinish() {
                mGameIsInProgress = false;
                textView.setText("done!");
                mRetryButton.setVisibility(View.VISIBLE);
            }
        };
    }

@Override
    public void onResume() {
        // Start or resume the game.
        super.onResume();

if (mGameIsInProgress) {
            resumeGame(mTimerMilliseconds);
        }
    }

@Override
    public void onPause() {
        // Cancel the timer if the game is paused.
        mCountDownTimer.cancel();
        super.onPause();
    }

private void showInterstitial() {
        // Show the ad if it's ready. Otherwise toast and restart the game.
        if (mInterstitialAd != null && mInterstitialAd.isLoaded()) {
            mInterstitialAd.show();
        } else {
            Toast.makeText(this, "Ad did not load", Toast.LENGTH_SHORT).show();
            startGame();
        }
    }

private void startGame() {
        // Request a new ad if one isn't already loaded, hide the button, and kick off the timer.
        if (!mAdIsLoading && !mInterstitialAd.isLoaded()) {
            mAdIsLoading = true;
            PublisherAdRequest adRequest = new PublisherAdRequest.Builder().build();
            mInterstitialAd.loadAd(adRequest);
        }

mRetryButton.setVisibility(View.INVISIBLE);
        resumeGame(GAME_LENGTH_MILLISECONDS);
    }

private void resumeGame(long milliseconds) {
        // Create a new timer for the correct length and start it.
        mGameIsInProgress = true;
        mTimerMilliseconds = milliseconds;
        createTimer(milliseconds);
        mCountDownTimer.start();
    }
}