为什么我的ListView不接受我的自定义OnItemSelectedListener？

我有一个ListView，我想创建一个OnItemSelectedListner，我在代码中做的，我称之为mylistener。为什么list.setOnItemSelectedListener不接受mylistener？为什么我的ListView不接受我的自定义OnItemSelectedListener？

感谢您的帮助

ListView list = (ListView)findViewById(android.R.id.list); 
     ArrayAdapter<String> adapter = new ArrayAdapter<String> (this,android.R.layout.simple_list_item_1,array); 
     list.setAdapter(adapter); 
     list.setOnItemSelectedListener(mlistener); 
     AdapterView.OnItemSelectedListener mlistener = new  AdapterView.OnItemSelectedListener(){ 
     @Override 
      public void onItemSelected(AdapterView<?> arg0, View arg1, 
        int arg2, long arg3) { 
       Toast.makeText(getApplicationContext(),"selezionato",  Toast.LENGTH_LONG).show();    
      } 
      @Override 
      public void onNothingSelected(AdapterView<?> arg0) { 
       // TODO Auto-generated method stub 
      } 

     };

来源

2012-12-04 Lisa Anne

申报'mlistener' ** **前设置它的'ListView'。 – Luksprog

Eclipse警告“mlistener无法解析为变量” –

@Luksprog谢谢，我以为我之前做过。 –

还应当声明并使用它之前初始化mlistener。

来源

2012-12-04 11:02:03 birdy

尝试之前list.setOnItemSelectedListener(mlistener);

来源

2012-12-04 11:03:52

创建的侦听器只是重新安排你的代码：

ListView list = (ListView)findViewById(android.R.id.list); 
ArrayAdapter<String> adapter = new ArrayAdapter<String> this,android.R.layout.simple_list_item_1,array); 
AdapterView.OnItemSelectedListener mlistener = new AdapterView.OnItemSelectedListener(){ 
    @Override 
    public void onItemSelected(AdapterView<?> arg0, View arg1, int arg2, long arg3) { 
     Toast.makeText(getApplicationContext(),"selezionato", Toast.LENGTH_LONG).show();    
    } 
    @Override 
    public void onNothingSelected(AdapterView<?> arg0) { 
     // TODO Auto-generated method stub 
    } 
}; 

list.setAdapter(adapter); 
list.setOnItemSelectedListener(mlistener);

来源

2012-12-04 11:05:27

为什么我的ListView不接受我的自定义OnItemSelectedListener？

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