ArrayList上的索引问题（Android Studio）

我想创建一个简单的猜谜游戏，使用媒体播放器从基于android studio中的ArrayList数组的歌曲中获取内容。所以我在开始时声明了一个索引，每次随机增加1，并且每当用户单击一个答案（使用onClick方法）时也会发生。ArrayList上的索引问题（Android Studio）

ImageButton play, answer1, answer2, answer3; 
int[] song = new int[] {R.raw.beautifulithurts, R.raw.iwontletyouwalkaway, R.raw.lebihindah, R.raw.ruletheworld, R.raw.sweetescape, R.raw.thatgirl, R.raw.thisislivingnow, R.raw.thislife, R.raw.thousandmiles, R.raw.u}; 
int[] image = new int[] {R.drawable.lvlaa, R.drawable.lvlab, R.drawable.lvlac, R.drawable.lvlad, R.drawable.lvlae, R.drawable.lvlaf, R.drawable.lvlag, R.drawable.lvlah, R.drawable.lvlai, R.drawable.lvlaj}; 
ArrayList<Integer> numbers = new ArrayList<>(); 
ArrayList<Integer> cloning = new ArrayList<>(); 
int index = 0, a = 0, b = 1, c = 2, random = 0, x = 0, y = 0, z = 0, benar = 0, salah = 0; 
MediaPlayer mp; 

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

     play = (ImageButton) findViewById(R.id.play); 
     answer1 = (ImageButton) findViewById(R.id.answer1); 
     answer2 = (ImageButton) findViewById(R.id.answer2); 
     answer3 = (ImageButton) findViewById(R.id.answer3); 

     for (int i = 0; i <= song.length; i++) { 
      numbers.add(i); 
     } 
     Collections.shuffle(numbers); 

     random(); 

     play.setOnClickListener(this); 
     answer1.setOnClickListener(this); 
     answer2.setOnClickListener(this); 
     answer3.setOnClickListener(this); 
    } 

    public void prepareAnswer() {...} 

    public void random() { 
     mp = MediaPlayer.create(this, song[numbers.get(index)]); 
     mp.start(); 
     prepareAnswer(); 
     answer1.setImageResource(image[x]); 
     answer2.setImageResource(image[y]); 
     answer3.setImageResource(image[z]); 
     index++; 
    } 

    @Override 
    public void onClick(View v) {...} 
}

但每次我重新启动游戏时，logcat的显示错误：数组索引出界的异常（尺寸：10指数：10）。如何处理此错误并将索引重置为0，每次我重新启动游戏时？

来源

2016-11-05 Yoel

请张贴在这里您完全logcat的错误....... – sushildlh

java.lang.ArrayIndexOutOfBoundsException：长度= 10; index = 10 at com.lucreamysong.beatupthebeat.game.random（game.java:92） at com.lucreamysong.beatupthebeat.game.onClick（game.java:118） @sushildlh – Yoel

看看答案，我想它解决你的问题..... – sushildlh

使用下面的代码，而不是你.....

for (int i = 0; i < song.length; i++) { 
      numbers.add(i); 
     }

注： - 问题是，你在这里添加额外的数量和访问从song数组列表中不存在额外的价值.. ...如： -

song have 10 values and you are trying to access 11th value .....

来源

2016-11-05 06:48:13 sushildlh

ArrayList上的索引问题（Android Studio）

回答

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