android - 如何使用 Android Spinner 对象加载其他活动？

Question

我想要一个微调器，当从微调器中选择一个项目时，它应该加载已设置的相应 Java 页面。我们可以在 android 中从微调器中选择一个项目时加载一个 Java 页面吗？如果可以，我们如何实现这一点，任何人都可以提供一些示例代码

Answer 1

你可以

.setOnItemSelectedListener(new OnItemSelectedListener() {
                @Override
                public void onItemSelected(AdapterView<?> arg0, View arg1,
                        int position, long arg3) {
                    switch(position) {
                                            //Use cases to set Intents
                                            } 


                @Override
                public void onNothingSelected(AdapterView<?> arg0) {
                    // Do Nothing
                }
            });

Answer 2

String[] items ={“One”,“Two”,“Three”,“Four”,“Five”};

Spinner sp = (Spinner)findViewById(R.id.Spinner01); 
ArrayAdapter<String> adapter = 
        new ArrayAdapter<String> (this, 
        android.R.layout.simple_spinner_item,items);
sp.setOnItemSelectedListener(new OnItemSelectedListener() {
    @Override
    public void onItemSelected(AdapterView<?> arg0, View arg1, int position, long arg3) {
      switch(position){
case 0:
//call first class
break;
case 1:
//call second class
break;
case 2:
//call third class
break;
case 3:
//call fourth class
break;
default:
break;
    }


    @Override
    public void onNothingSelected(AdapterView<?> arg0) {
//nothing selected from spinner
    }
});

Answer 3

只需使用 spinner.onItemSelectedListener(new OnItemSelectedListener())

并在 onItemSelected(AdapterView adapterview, View view, int position, long id) 方法主体中编写逻辑以根据位置启动新活动。