在新活动前关闭对话框

Question

我正在创建一个游戏，其中用户选择图像并创建一个谜题。第一个屏幕让用户选择一个图像，并且点击时出现一个对话框，让用户选择难度。在ImageSelection之后，图像在ShowImage Activity中显示三秒钟，之后GamePlay启动。我创建了如下对话框：

import android.app.AlertDialog; 
import android.content.Context; 
import android.content.DialogInterface; 
import android.content.Intent; 

class GameDialog { 

    private static Context mContext; 
    private static int difficulty; 
    static AlertDialog d; 

    public static AlertDialog showDifficulties(Context c, final int img_id) { 

     mContext = c; 

     AlertDialog.Builder builder = new AlertDialog.Builder(mContext); 
     builder.setTitle("Select difficulty") 
       .setItems(R.array.my_array, new DialogInterface.OnClickListener() { 
        public void onClick(DialogInterface dialog, int which) { 
        // the 'which' argument contains the index position 
        // of the selected item 

         // default difficulty is 3 
         int difficulty = 3; 

         // options for difficulties 
         switch (which) { 

          // when the user clicks 'easy' 
          case 0: 
           difficulty = 3; 
           System.out.print("DIFFICULTY"); 
           System.out.println("" + difficulty); 

          break; 

          // when the user clicks 'medium' 
          case 1: 
          difficulty = 4; 

          System.out.print("DIFFICULTY"); 
          System.out.println("" + difficulty); 
          break; 

          // when the user clicks 'hard' 
          case 2: 
          difficulty = 5; 

          System.out.print("DIFFICULTY"); 
          System.out.println("" + difficulty); 
          break; 
          } 

         // send intent with image id and difficulty 
         // to ShowImage activity 
         Intent start_game = new Intent(mContext, ShowImage.class); 
         start_game.putExtra("img_id", img_id); 
         start_game.putExtra("difficulty", difficulty); 
         d.dismiss(); 
         mContext.startActivity(start_game); 
       } 
     }); 

     d = builder.create(); 
     return d; 

    } 
} 

这很好（工作）。其次，在GamePlay中，我希望用户能够从菜单中更改难度，之后应用程序再次启动ShowImage，但是具有相应的选择难度。 下面是游戏的代码：

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 

    // handle item selection 
    switch (item.getItemId()) { 
     case R.id.reset_game: 
      //TODO: resets the game to initial shuffled tiles 
      Intent intent = getIntent(); 
      finish(); 
      startActivity(intent); 

     case R.id.difficulty: 
      // lets user change the difficulty of the game 
      // pass the index to the dialog and show the dialog 
      Dialog d = GameDialog.showDifficulties(GamePlay.this, selected_image); 
      System.out.println(selected_image); 
      d.show(); 

     case R.id.quit: 
      // returns the user to ImageSelection 
      intent = new Intent(GamePlay.this, ImageSelection.class); 
      intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 
      startActivity(intent); 
      finish(); 
     default: 
      return super.onOptionsItemSelected(item); 
    } 
} 

然而，应用程序引发错误“的游戏已泄漏（ETC），最初这里添加窗口com.android.internal.policy.impl.PhoneWindow $ DecorView” 我做了一些研究，并认为它可能是由于没有关闭ImageSelection Activity中的对话框而导致的。所以我采取了一些步骤，并已将此添加到我的ImageSelection活动：

@Override 
public void onPause() 
{ 
    d.dismiss(); 
    super.onPause(); 

} 

然而，这并没有解决我的问题：C 我的问题因此，我在做什么错了，我如何修正这个错误？目标是从两个不同的活动中获得同一个对话框（来自我创建的独立课程）。 在此先感谢！

编辑：我现在添加了“d.dismiss（）;”到Hany Elsioufy建议的对话类，但是这并没有解决问题。

Answer 1

我修好了！

原来我不得不返回语句添加到我的switch-case中onOptionsItemSelected（）：

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 

    // handle item selection 
    switch (item.getItemId()) { 
     case R.id.reset_game: 
      //TODO: resets the game to initial shuffled tiles 
      Intent intent = getIntent(); 
      finish(); 
      startActivity(intent); 
      return true; 

     case R.id.difficulty: 
      // lets user change the difficulty of the game 
      // pass the index to the dialog and show the dialog 
      Dialog d = GameDialog.showDifficulties(GamePlay.this, selected_image); 
      System.out.println(selected_image); 
      d.show(); 
      return true; 

     case R.id.quit: 
      // returns the user to ImageSelection 
      intent = new Intent(GamePlay.this, ImageSelection.class); 
      intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 
      startActivity(intent); 
      finish(); 
      return true; 

     default: 
      return super.onOptionsItemSelected(item); 

    } 
} 

Answer 2

Define AlertDialog d;作为一个实例变量，然后之前的任何startActivity或意图写：

d.dismiss(); 

Answer 3

@覆盖 公共布尔onOptionsItemSelected（菜单项项）{

// handle item selection 
switch (item.getItemId()) { 
    case R.id.reset_game: 
     //TODO: resets the game to initial shuffled tiles 
     Intent intent = getIntent(); 
     finish(); 
     startActivity(intent); 

    case R.id.difficulty: 
     // lets user change the difficulty of the game 
     // pass the index to the dialog and show the dialog 
     Dialog d = GameDialog.showDifficulties(GamePlay.this, selected_image); 
     System.out.println(selected_image); 
     d.show(); 

    case R.id.quit: 
     // returns the user to ImageSelection 
     intent = new Intent(GamePlay.this, ImageSelection.class); 
     intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 
     startActivity(intent); 
     finish(); 
    default: 
     return super.onOptionsItemSelected(item); 
} 

}

在上面的代码中，有是没有突破的声明。 使用开关盒时请使用break语句。