Question

我有8个微调器：

        pl1sp = (Spinner) offersdialoglayout.findViewById(R.id.pl1offer);
        pl2sp = (Spinner) offersdialoglayout.findViewById(R.id.pl2offer);
        pl3sp = (Spinner) offersdialoglayout.findViewById(R.id.pl3offer);
        pl4sp = (Spinner) offersdialoglayout.findViewById(R.id.pl4offer);

和

        pl1scores = (Spinner) scoresdialoglayout.findViewById(R.id.pl1scores);
        pl2scores = (Spinner) scoresdialoglayout.findViewById(R.id.pl2scores);
        pl3scores = (Spinner) scoresdialoglayout.findViewById(R.id.pl3scores);
        pl4scores = (Spinner) scoresdialoglayout.findViewById(R.id.pl4scores);

我需要设置2个监听器。一个用于前4个微调器，一个用于后4个。我不想重复这样的代码：

pl1sp.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

        public void onItemSelected(AdapterView<?> arg0, View arg1,
                int arg2, long arg3) {
            checkOffersSum(); // same method for first 4 spinners. for last 4 spinners is checkScoresSum()

        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {
            // TODO Auto-generated method stub.

        }

    });
    pl2sp.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

        public void onItemSelected(AdapterView<?> arg0, View arg1,
                int arg2, long arg3) {
            checkOffersSum();
        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {
            // TODO Auto-generated method stub.

        }

    });

等等.. 所以我只需要编写两次监听器，首先是前4个微调器，第二个是最后4个微调器。感谢

Answer 1

您可以使用单个侦听器管理多个微调器。请检查this回答。它处理同样的问题。希望它有所帮助。

Answer 2

请按照以下步骤操作：

在您的班级中实施OnItemSelectedListener并覆盖未实施的方法onItemSelected(AdapterView<?> arg0, View view, int arg2, long arg3)。
使用pl1sp.setOnItemSelectedListener（this）并为所有微调器执行此操作。

像这样使用overridenmethod onItemSelected(AdapterView<?> arg0, View view, int arg2, long arg3)：

@Override

public void onItemSelected(AdapterView<?> arg0, View view, int arg2, long arg3) {


    int id = view.getId();

    if(id==R.id.pl1offer || id==R.id.pl2offer || id==R.id.pl3offer ||id==R.id.pl4offer){

        // do this
    }

    else{
        //do this
    }
}

Answer 3

为前4个微调器定义一个侦听器

Spinner[] offerspinners = {R.id.pl1offer, R.id.pl2offer, R.id.pl3offer, R.id.pl4offer}; 
for(Spinner offer : offerspinners){
    offersdialoglayout.findViewById(offer).
            setOnItemSelectedListener(offerListener);
}

AdapterView.OnItemSelectedListener offerListener = 
    new AdapterView.OnItemSelectedListener() {
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            switch(parent.id){
                case R.id.pl1offer:
                    // offer 1 related code
                    break;
                case R.id.pl2offer:
                    // offer 2 related code
                    break;
            }
            // common code
        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {
            // TODO Auto-generated method stub.
        }
    }

比在此定义具有相同代码的第二个侦听器

Spinner[] scorespinners = {R.id.pl1scores, R.id.pl2scores, R.id.pl3scores, R.id.pl4scores}; 
for(Spinner score : scorespinners){
    scoresdialoglayout.findViewById(score).
            setOnItemSelectedListener(scoreListener);
}

AdapterView.OnItemSelectedListener scoreListener = 
    new AdapterView.OnItemSelectedListener() {
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            switch(parent.id){
                case R.id.pl1scores:
                    // score 1 related code
                    break;
                case R.id.pl2scores:
                    // score 2 related code
                    break;
            }
            // common code
        }

        @Override
        public void onNothingSelected(AdapterView<?> arg0) {
            // TODO Auto-generated method stub.
        }
    }

Answer 4

你可以做的是创建一个包含所有微调器的数组，然后使用for循环将每个微调器连接到setItemSelected（）方法，即

HT2010

多个微调器的相同项目更改侦听器

4 个答案: