無法在線程中創建處理程序沒有調用Looper.prepare（）爲我評分對話框

Question

我試圖在我正在處理的遊戲中實現「評分我」對話框，按照此指示頁：

http://www.androidsnippets.com/prompt-engaged-users-to-rate-your-app-in-the-android-market-appirater

我想我已經根據所提供的指令實現的一切，但是當我打電話AppRater.showRateDialog（這一點，空）方法我的遊戲崩潰，我得到的logcat以下錯誤輸出：

06-20 19:29:34.622: E/AndroidRuntime(25236): FATAL EXCEPTION: GLThread 6087 
06-20 19:29:34.622: E/AndroidRuntime(25236): java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare() 
06-20 19:29:34.622: E/AndroidRuntime(25236): at android.os.Handler.<init>(Handler.java:121) 
06-20 19:29:34.622: E/AndroidRuntime(25236): at android.app.Dialog.<init>(Dialog.java:114) 
06-20 19:29:34.622: E/AndroidRuntime(25236): at android.app.Dialog.<init>(Dialog.java:138) 
06-20 19:29:34.622: E/AndroidRuntime(25236): at com.kittykazoo.distantshores.android.AppRater.showRateDialog(AppRater.java:45) 
06-20 19:29:34.622: E/AndroidRuntime(25236): at com.kittykazoo.helpers.InputPoller.updateMainMenu(InputPoller.java:140) 
06-20 19:29:34.622: E/AndroidRuntime(25236): at com.kittykazoo.helpers.InputPoller.update(InputPoller.java:68) 
06-20 19:29:34.622: E/AndroidRuntime(25236): at com.kittykazoo.gameworld.GameWorld.update(GameWorld.java:141) 
06-20 19:29:34.622: E/AndroidRuntime(25236): at com.kittykazoo.screens.GameScreen.render(GameScreen.java:20) 
06-20 19:29:34.622: E/AndroidRuntime(25236): at com.badlogic.gdx.Game.render(Game.java:46) 
06-20 19:29:34.622: E/AndroidRuntime(25236): at com.badlogic.gdx.backends.android.AndroidGraphics.onDrawFrame(AndroidGraphics.java:422) 
06-20 19:29:34.622: E/AndroidRuntime(25236): at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1516) 
06-20 19:29:34.622: E/AndroidRuntime(25236): at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1240) 

這是源代碼我主要的Android類：

public class AndroidLauncher extends AndroidApplication { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 

     super.onCreate(savedInstanceState); 

     AndroidApplicationConfiguration config = new AndroidApplicationConfiguration(); 
     DistantShores ds = new DistantShores(); 
     initialize(ds, config); 

     // Designate AppRater 
     DistantShores.setAppRater(new AppRater(this)); 

    } 

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

} 

...併爲AppRater類的源代碼：

公共類AppRater實現AppRaterInterface {

private Activity mContext; 
SharedPreferences prefs; 
SharedPreferences.Editor editor; 
private Button b1, b2, b3; 

public AppRater(Activity mContext) { 
    this.mContext = mContext; 
    prefs = mContext.getSharedPreferences("kk_distantshores_apprater", 0); 
    editor = prefs.edit(); 
} 

public boolean isTimeoutElapsed() { 
    if (prefs.getLong("lastShow", System.currentTimeMillis()) >= TIMEOUT) 
     return true; 
    return false; 
} 

public void showRateDialog() { 

    if (prefs.getBoolean("dontshowagain", false)) { 
     return; 
    } 

    editor.putLong("lastShow", System.currentTimeMillis()); 

    final Dialog dialog = new Dialog(mContext); 
    dialog.setTitle("Rate " + APP_TITLE); 

    LinearLayout ll = new LinearLayout(mContext); 
    ll.setOrientation(LinearLayout.VERTICAL); 

    final TextView tv = new TextView(mContext); 
    tv.setText("If you enjoy using " + APP_TITLE 
      + ", please take a moment to rate it. Thanks for your support!"); 
    tv.setWidth(240); 
    tv.setPadding(4, 0, 4, 10); 
    ll.addView(tv); 

    b1 = new Button(mContext); 
    b1.setText("Rate " + APP_TITLE); 
    b1.setOnClickListener(new OnClickListener() { 
     public void onClick(View v) { 

      final Uri uri = Uri.parse("market://details?id=" + APP_PNAME); 
      final Intent rateAppIntent = new Intent(Intent.ACTION_VIEW, uri); 

      if (mContext.getPackageManager().queryIntentActivities(rateAppIntent, 0).size() > 0) { 
       mContext.startActivity(rateAppIntent); 
       dialog.dismiss(); 
      } else { 

       /* the device has no way to handle market urls */ 

       dialog.setTitle("Error!"); 
       tv.setText("No Market app detected. In order to rate this app the Google Play Store must be installed."); 
       b1.setVisibility(View.GONE); 
       b2.setVisibility(View.GONE); 
       b3.setText("Cancel"); 

      } 

     } 
    }); 
    ll.addView(b1); 

    b2 = new Button(mContext); 
    b2.setText("Remind me later"); 
    b2.setOnClickListener(new OnClickListener() { 
     public void onClick(View v) { 
      dialog.dismiss(); 
     } 
    }); 
    ll.addView(b2); 

    b3 = new Button(mContext); 
    b3.setText("No, thanks"); 
    b3.setOnClickListener(new OnClickListener() { 
     public void onClick(View v) { 
      if (editor != null) { 
       editor.putBoolean("dontshowagain", true); 
       editor.commit(); 
      } 
      dialog.dismiss(); 
     } 
    }); 
    ll.addView(b3); 

    dialog.setContentView(ll); 
    dialog.show(); 

} 

}

Answer 1

你對話的需求一個活動上下文，看起來像是在非ui線程中創建對話框。請檢查您傳遞給對話構造函數的上下文。

Answer 2

我設法通過將對話代碼封裝在runOnUiThread（）實例中來實現它。