Android調用廣告類

Question

我想在我的Android遊戲中實現廣告。我創建了一個名爲Ads的類，我使用下面的方法從另一個類中的另一個類調用它。

public class ControlCenter1 extends AppCompatActivity { 

     @Override 
     protected void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.activity_control_center1); 

      public ControlCenter1(Context context) 
    { 
     mScene = ParrotsConstent.E_SCENARIO.MENU; 
     mContext = context; 
     mScore = new Score(); 
     mSound = new Sound(context); 
     mTimer = new Timer(ParrotsConstent.MAX_TIME); 
     mAnimalPic = new int[(int) ParrotsConstent.GRID_NUM][(int) ParrotsConstent.GRID_NUM]; 
     mPicBak = new int[(int) ParrotsConstent.GRID_NUM][(int) ParrotsConstent.GRID_NUM]; 
     mEffect = new int[(int) ParrotsConstent.GRID_NUM][(int) ParrotsConstent.GRID_NUM]; 
     mDisappearToken = new int[(int) ParrotsConstent.GRID_NUM][(int) ParrotsConstent.GRID_NUM]; 
     mToken = new ActionTokenPool(); 
     init(); 
    } 

    public static Handler mHandler = new Handler(){ 
      @Override 
      public void handleMessage(Message msg) 
      { 
       switch(msg.what) 
       { 
    case GAME_OVER_START: 
        { 
         CtlTip2 ctl = (CtlTip2) drawTip2.control; 
         ctl.init(ParrotsConstent.E_TIP.GAMEOVER.ordinal()); 
         mSound.play(ParrotsConstent.E_SOUND.TIMEOVER); 
         break; 
        } 

     case GAME_OVER_END: 
      { 
       Ads ads = new Ads(); 
       ads.Adss(); 
       break; 
      } 
    } 
    } 

類與谷歌的廣告如下：

public class Ads extends AppCompatActivity { 

    InterstitialAd mInterstitialAd; 

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

    public void Adss() 
{ 
     AdRequest adRequest = new AdRequest.Builder().build(); 


     mInterstitialAd = new InterstitialAd(this); 
     mInterstitialAd.setAdUnitId(getString(R.string.admob_interstitial_id)); 

     mInterstitialAd.loadAd(adRequest); 

     mInterstitialAd.setAdListener(new AdListener() { 
      public void onAdLoaded() { 
       displayInterstitial(); 
       onPause(); 
      } 

      public void onAdClosed() { 
       onResume(); 
       mScene = ParrotsConstent.E_SCENARIO.RESULT; 
      } 
     }); 
    } 

    public void displayInterstitial() { 
     if (mInterstitialAd.isLoaded()) { 
      mInterstitialAd.show(); 
     } 
    } 
} 

沒有廣告遊戲運行流暢。我在運行遊戲之前沒有收到錯誤信息，但是一旦我運行遊戲，並且在遊戲結束時發生以下致命錯誤。

致命異常：主 工藝：PID：2566

java.lang.NullPointerException: Attempt to invoke virtual method android.content.res.Resources android.content.Context.getResources()' on a null object reference 
at android.content.ContextWrapper.getResources(ContextWrapper.java:86) 
at android.view.ContextThemeWrapper.getResourcesInternal(ContextThemeWrapper.java:127)                    at android.view.ContextThemeWrapper.getResources(ContextThemeWrapper.java:121)                    atandroid.support.v7.app.AppCompatActivity.getResources(AppCompatActivity.java:549) 
at android.content.Context.getString(Context.java:476) 
at com.gamingtechnology.parrots.Ads.Adss(Ads.java:69) 
at com.gamingtechnology.parrots.Core.ControlCenter1$2.handleMessage(ControlCenter1.java:1188) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:154) 
at android.app.ActivityThread.main(ActivityThread.java:6119) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776) 

Answer 1

無法實例那樣的一個活動。它根本無法工作。

您必須從startActivity開始。

Answer 2

無法實例類似這樣的活動， 試試這個辦法，

public class ControlCenter1 extends AppCompatActivity { 
    private static Context mContext; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_control_center1); 
     mContext = this; 

public static Handler mHandler = new Handler(){ 
     @Override 
     public void handleMessage(Message msg) 
     { 
      switch(msg.what) 
      { 
case GAME_OVER_START: 
       { 
        CtlTip2 ctl = (CtlTip2) drawTip2.control; 
        ctl.init(ParrotsConstent.E_TIP.GAMEOVER.ordinal()); 
        mSound.play(ParrotsConstent.E_SOUND.TIMEOVER); 
        break; 
       } 

    case GAME_OVER_END: 
     { 
      Intent intent = new Intent(mContext , Ads.class); 
     mContext .startActivity(intent); 
     break; 
     } 
} 
}