Android Studio Java-如何使用随机数组而不重复

Question

我有一个随机消息数组，但我想要它，这样它就不会拾取已经拾取的消息，然后在拾取所有消息后重置。

public void showRandomMsg(){
shuffleMsg();
answer1.setText((messageArray[0].getmAns()));
message2.setText((messageArray[0].getmMsg()));
toyView1.setImageResource(messageArray[0].getmImage());
}
Messages m01 = new Messages(R.drawable.crown1, "Mesage 0 A","Message 0 B");
Messages m02 = new Messages(R.drawable.crown2,"Mesage 1 A","Message 1 B");
Messages m03 = new Messages(R.drawable.crown3,"Mesage 2 A","Message 2 B");
Messages m04 = new Messages(R.drawable.crown4,"Mesage 3 A","Message 3 B");
Messages m05 = new Messages(R.drawable.crown5,"Mesage 4 A","Message 4 B");
Messages [] messageArray=new Messages[]{
m01, m02, m03, m04, m05
};
public void shuffleMsg(){
Collections.shuffle(Arrays.asList(messageArray));
}

Answer 1

您可以为消息获取程序编写逻辑，该程序删除一条消息，在没有消息可用的情况下，重新填充：

List<Messages> messageList;
public void showRandomMsg(){
if (Objects.isNull(messageList) || messageList.size() == 0) {
refillMsg();
}
answer1.setText(messageList.remove(0).getmAns());
message2.setText(messageList.remove(0).getmMsg());
toyView1.setImageResource(messageList.remove(0).getmImage());
}
public void refillMsg() {
messageList = Arrays.asList(new Messages[] {
m01, m02, m03, m04, m05
});
Collections.shuffle(messageList);
}