Question

我实施了警报对话，但我遇到了问题。此对话框重复三次：当应用程序启动时，两次我开始游戏时（使用微调器和意图后）。我的要求是这个警告对话框必须只显示一次（也许当我在意图之后打开游戏时）但是如果它将在应用程序的开头打开它也会很好。谢谢大家。这里有我的代码：

Spinner s = (Spinner) findViewById(R.id.Spinner01);
        @SuppressWarnings("rawtypes")
        ArrayAdapter adapter = ArrayAdapter.createFromResource(
                this, R.array.type, android.R.layout.simple_spinner_item);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        s.setAdapter(adapter);

        scelta = flags;

        button1 = (Button) findViewById(R.id.button1);

        button1.setOnClickListener(new OnClickListener() {

        @Override

        public void onClick(View view) {
            scelta = flags;
   }

    });
        button2 = (Button) findViewById(R.id.button2);

        button2.setOnClickListener(new OnClickListener() {
            public void onClick(View view) {
                scelta = pokemon;
}
        });

        button3 = (Button) findViewById(R.id.button3);

        button3.setOnClickListener(new OnClickListener() {
            public void onClick(View view) {
                scelta = smiles;
}
        });

        button4 = (Button) findViewById(R.id.button4);

        button4.setOnClickListener(new OnClickListener() {
            public void onClick(View view) {
                scelta = MU;
}
        });
 s.setOnItemSelectedListener(new OnItemSelectedListener(){

   @Override
   public void onItemSelected(
        android.widget.AdapterView<?> arg0, 
   View arg1, int pos, long arg3){

   AlertDialog.Builder miaAlert = new AlertDialog.Builder(Manager.this);
   miaAlert.setTitle("Which is the difficulty?");

   miaAlert.setCancelable(false);
   miaAlert.setPositiveButton("Facile", new DialogInterface.OnClickListener() {
   public void onClick(DialogInterface dialog, int id) {
           easy = 10;

                }
              });

   miaAlert.setNegativeButton("Difficile", new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int id) {
             hard = -5; 
                }

              });
              AlertDialog alert = miaAlert.create();
              alert.show();

 //  ((Spinner) findViewById(R.id.Spinner01)).setSelection(0);

Hard and Easy是我用来增加和减少游戏中玩家可能性的两个int变量

Answer 1

如果s是R.id.Spinner01，则

((Spinner) findViewById(R.id.Spinner01)).setSelection(0);

导致导致异常的循环。您应该避免在setSelection内拨打onItemSelected，因为setSelection会触发onItemSelected

一个我看不到的循环

1 个答案: