On Spinner init - >自动选择避免

Question

我搜索了一个解决方案，以避免在动态创建的微调器上自动选择。我发现链接：Spinner onItemSelected() executes when it is not suppose to

但我不能让它在我的代码工作：

private void populateSpinner() { 
     //Spinner spinnerKostenstellen; 
     //spinnerKostenstellen = (Spinner) findViewById(R.id.spinner2); 
     //spinnerKostenstellen = (Spinner) SpinnerLayout.findViewById(R.id.spinner2); 

     AlertDialog.Builder adb2 = new AlertDialog.Builder(this); 
     LayoutInflater adbInflater2 = LayoutInflater.from(this); 
     View SpinnerLayout = adbInflater2.inflate(R.layout.spinner, null); 
     adb2.setView(SpinnerLayout); 
     adb2.setTitle("Kostenstelle auswählen:"); 
     spinnerKostenstellen = (Spinner) SpinnerLayout.findViewById(R.id.spinner2); 
     spinnerKostenstellen.setSelection(1, false); 
     spinnerKostenstellen.setOnItemSelectedListener(this); 
     //spinnerKostenstellen.setCallbackDuringFling(false); 
     List<String> lables = new ArrayList<String>(); 

     for (int i = 0; i < kostenstellenList.size(); i++) { 
      lables.add(kostenstellenList.get(i).getKst()); 
     } 

     // Creating adapter for spinner 
     //ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_dropdown_item); 

     //ArrayAdapter<String> kostenstellenList = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_dropdown_item); 
     ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_dropdown_item, lables); 
     // Drop down layout style - list view with radio button 
     spinnerAdapter 
       .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 

     // attaching data adapter to spinner 
     spinnerKostenstellen.setAdapter(spinnerAdapter); 
     adb2.show(); 
    } 

Answer 1

（编辑）下面的代码隐藏第一空白值从旋转

List<String> urlist = new ArrayList<String>(); 
urlist.add(""); // Initial dummy entry 
urlist.add("yourstring1"); 
urlist.add("yourstring2"); 
urlist.add("yorustring3"); 


ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, urlist) { 
    @Override 
    public View getDropDownView(int position, View convertView, ViewGroup parent) 
    { 
     View v = null; 

     // If this is the initial blnk entry, make it hidden 
     if (position == 0) { 
      TextView tv = new TextView(getContext()); 
      tv.setHeight(0); 
      tv.setVisibility(View.GONE); 
      v = tv; 
     } 
     else { 
      // Pass convertView as null to prevent reuse of special case views 
      v = super.getDropDownView(position, null, parent); 
     } 

     return v; 
    } 
}; 

dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
mySpinner.setAdapter(dataAdapter); 

Answer 2

显示对话框后（也是在适配器设置后），尝试更改要设置的OnItemSelectedListener。这应该可以防止微调员在用户选择某个东西之前触发其听众。 YOURCLASSNAME不管你的当前类的名称，该代码人死亡。

private void populateSpinner() { 
    //Spinner spinnerKostenstellen; 
    //spinnerKostenstellen = (Spinner) findViewById(R.id.spinner2); 
    //spinnerKostenstellen = (Spinner) SpinnerLayout.findViewById(R.id.spinner2); 

    AlertDialog.Builder adb2 = new AlertDialog.Builder(this); 
    LayoutInflater adbInflater2 = LayoutInflater.from(this); 
    View SpinnerLayout = adbInflater2.inflate(R.layout.spinner, null); 
    adb2.setView(SpinnerLayout); 
    adb2.setTitle("Kostenstelle auswählen:"); 
    spinnerKostenstellen = (Spinner) SpinnerLayout.findViewById(R.id.spinner2); 
    spinnerKostenstellen.setSelection(1, false); 
    //spinnerKostenstellen.setCallbackDuringFling(false); 
    List<String> lables = new ArrayList<String>(); 

    for (int i = 0; i < kostenstellenList.size(); i++) { 
     lables.add(kostenstellenList.get(i).getKst()); 
    } 

    // Creating adapter for spinner 
    //ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_dropdown_item); 

    //ArrayAdapter<String> kostenstellenList = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_dropdown_item); 
    ArrayAdapter<String> spinnerAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_dropdown_item, lables); 
    // Drop down layout style - list view with radio button 
    spinnerAdapter 
     .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 

    // attaching data adapter to spinner 
    spinnerKostenstellen.setAdapter(spinnerAdapter); 
    // use .create to get the AlertDialog 
    AlertDialog dialog = adb2.create(); 
    // set an OnShowListener 
    dialog.setOnShowListener(new DialogInterface.OnShowListener() { 
     @Override 
     public void onShow(DialogInterface dialog) { 
      spinnerKostenstellen.setOnItemSelectedListener(YOURCLASSNAME.this); 
     } 
    }); 
    dialog.show(); 
}