Question

我想问一下如何在同一个活动中同时使用微调器和按钮。 Spinner使用onItemListener监听，然后该按钮也会有一个onClick监听器。所以在我的情况下，它会产生错误。我的方案是我从微调器中获取选定的字符串，然后从editTexts获取其余值，然后点击“submit”将数据发送到服务器。但我估计这两位听众对彼此不是很友好？

我为微调器设置了这些方法：

spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
    @Override
    public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
        // your code here
    }

    @Override
    public void onNothingSelected(AdapterView<?> parentView) {
        // your code here
    }
});

然后我需要为按钮设置onclick监听器：

go.setOnClickListener(new OnClickListener(){
    public void onClick(View arg0)
    {
    }

我在哪里放这个？在nothingSelected方法之前或之后？

Answer 1

我认为他们彼此非常友好：）

    spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
            // your code here
        }

        @Override
        public void onNothingSelected(AdapterView<?> parentView) {
            // your code here
        }

    });

    go.setOnClickListener(new OnClickListener() {

       @Override
       public void onClick(View arg0) {       
          // your code here                
       }
   });

Answer 2

public class StackOverflowActivity extends Activity {

    private static final String[] SPINNER_DATA = new String[] { "Item 1", "Item 2" };

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Spinner spn = (Spinner) findViewById(R.id.spinner1);
        spn.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_dropdown_item_1line, SPINNER_DATA));
        spn.setOnItemSelectedListener(new OnItemSelectedListener() {

            @Override
            public void onItemSelected(AdapterView<?> arg0, View arg1,
                    int arg2, long arg3) {
                // TODO Auto-generated method stub
                Toast.makeText(getApplicationContext(),
                        "Spinner.onItemSelected()", Toast.LENGTH_LONG).show();
            }

            @Override
            public void onNothingSelected(AdapterView<?> arg0) {
                // TODO Auto-generated method stub
                Toast.makeText(getApplicationContext(),
                        "Spinner.onNothingSelected()", Toast.LENGTH_LONG)
                        .show();
            }
        });

        Button btn = (Button) findViewById(R.id.button1);
        btn.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Toast.makeText(getApplicationContext(), "Button.onClick()",
                        Toast.LENGTH_LONG).show();
            }
        });

    }
}

Android微调器和按钮

2 个答案: