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[英]my Arraylist keep replaced by last index value Android Studio
[英]Index issue on arraylist (Android Studio)
我正在嘗試創建一個簡單的游戲,使用媒體播放器來猜測歌曲的標題,該播放器根據android studio中基於arraylist的編號從數組歌曲中獲取內容。 因此,我在開頭聲明了一個索引,該索引對於每個隨機變量都增加1,並且每當用戶單擊答案(使用onClick方法)時也會發生。
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) {...}
}
但是每次我重新啟動游戲時,logcat都會顯示一個錯誤:數組索引超出范圍(大小:10 index:10)。 每次重新啟動游戲時,如何處理此錯誤並將索引重置為0?
使用下面的代碼,而不是你的.....
for (int i = 0; i < song.length; i++) {
numbers.add(i);
}
注意:-問題是您要在此處添加額外的編號,並從不存在的song
數組列表中訪問該額外的值..例如:-
這首歌有10個值,您正在嘗試訪問第11個值...
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