Question

我正在尝试检索所选的值微调器，并使用了以下代码

spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
    public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
        Object item = parent.getItemAtPosition(pos);
    }
    public void onNothingSelected(AdapterView<?> parent) {
    }
});

但我不能使用函数外的项的值！我是java的新手请有人帮助我.. 我试图在android中实现语音识别

     public void speakButtonClicked(View v)
                   {
                       startVoiceRecognitionActivity();
                   }

                   /**
                    * Fire an intent to start the voice recognition activity.
                    */
                   private void startVoiceRecognitionActivity()
                   {
                       Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
                        intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
                        RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);


 intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Voice recognition Demo...");
                    startActivityForResult(intent, REQUEST_CODE);
               }

               /**
                * Handle the results from the voice recognition activity.
                */
               @Override
            protected
               void onActivityResult(int requestCode, int resultCode, Intent data) 
               {


                   if (requestCode == REQUEST_CODE && resultCode == RESULT_OK)
                   {
                       // Populate the spinner with the String values the recognition engine thought it heard

                       ArrayList<String> matches = data.getStringArrayListExtra(
                               RecognizerIntent.EXTRA_RESULTS);
                       final  Button button12=(Button)findViewById(R.id.button12);

                       final Spinner Speech_spinner=(Spinner)findViewById(R.id.spinner3);         


                    Speech_spinner.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,
                              matches));
                    Speech_spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
                        public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
                            Text = parent.getItemAtPosition(pos).toString();

                        }
                        public void onNothingSelected(AdapterView<?> parent) {
                        }
                    });

                        button12.setText(Text); 




                        }
                   super.onActivityResult(requestCode, resultCode, data);


               }

button12

中没有值

Answer 1

使用最终对象，如：

final Object item;

在onCreate

之外的

Answer 2

在oncreate之外声明Object项，以便它可供整个类使用。

Answer 3

class Myactivity ...{

Object item ;

oncreate(...){
   ...

 spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
    public void onItemSelected(AdapterView<?> parent, View view, int pos, long id) {
        item = parent.getItemAtPosition(pos);
    }
    public void onNothingSelected(AdapterView<?> parent) {
    }
});
}
}

Answer 4

使用pos值作为已添加到适配器的数组的索引并获取该值或

spnproj.setAdapter(new ArrayAdapter<String>(PaymentDetail.this, android.R.layout.simple_spinner_item,arr));     
    spnproj.setOnItemSelectedListener(new OnItemSelectedListener() {

        @Override
        public void onItemSelected(AdapterView<?> arg0, View arg1,
                int arg2, long arg3) {

String value =arr[arg2];

Answer 5

步骤1.如果您已静态添加微调器，请使用Spinner spin=(Spinner)findViewById(R.id.spinner); 或动态地将其用作Spinner spin=new Spinner(YourActivity.this)

步骤2.添加数组中的项目以显示

array_spinner=new String[4];
array_spinner[0]="BFT";
array_spinner[1]="GFP";
array_spinner[2]="FSS";
array_spinner[3]="others";

步骤3.从微调器

中选择任何项目

ArrayAdapter adapter = new ArrayAdapter(this,android.R.layout.simple_spinner_item, array_spinner);
      spin.setAdapter(adapter);

步骤4.获取所选值的值

String anyvariable=String.valueOf(spin.getSelectedItem());

Answer 6

如果您在用户选择时不打算使用它，即在onItemSelected spinner.getSelectedItem()

中调用某种方法

在你的代码中这样：

 ...
 //get object to use
 Object myObj = spinner.getSelectedItem();
 // use object.

否则，在OnItemSelectedListener之外定义对象，就像其他答案一样。

从微调器中检索所选项目？

6 个答案: