錯誤的項目被選中

最初，它顯示所選擇正確的項目......但是重新填充列表則顯示錯誤的項目被選中後......請幫我找錯錯誤的項目被選中

Intially列表在的onCreate（）填充和onOptionsItemSelected（菜單項項目）被重新填充

public class MainActivity extends Activity { 

    MyListActivity adapter; 
    ListView list; 

    String[] web = { 
      "jerry", 
      "walters" 
    } ; 
    Integer[] imageId = { 
      R.drawable.ic_launcher, 
      R.drawable.ic_launcher  
    }; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     adapter = new MyListActivity(MainActivity.this, web, imageId); 
     list=(ListView)findViewById(R.id.listView1); 
     list.setAdapter(adapter); 
     list.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
      @Override 
      public void onItemClick(AdapterView<?> parent, View view,int position, long id) { 
       Toast.makeText(MainActivity.this, "You Clicked at " +web[+ position], Toast.LENGTH_SHORT).show(); 
      } 
     }); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.main, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 

     switch (item.getItemId()) { 

      case R.id.action_settings: 
       String[] web2 = { 
         "walters", 
         "jerry" 
       } ; 
       adapter = new MyListActivity(MainActivity.this, web2, imageId); 
       list.setAdapter(adapter); 
       return true; 
     } 
     return false; 
    } 

}

來源

2014-01-12 Jerry Wattre

試... 開關（item.getItemId（））{ 情況R.id.action_settings：字符串[] WEB2 = { 「沃爾特斯」，「傑裏」 }; list =（ListView）findViewById（R.id.listView1）; adapter = new MyListActivity（MainActivity.this，web2，imageId）; list.setAdapter（adapter）; 返回true; } –

你有這個 'web [position]'//總是顯示來自web字符串數組而不是web2 – Raghunandan

是的......問題是兩個不同的數組 –

你有這樣的

web[position] 
// get string from web string array not from web2 based on position

位置是索引。

web[0] = "jerry" 
web[1] ="walters"

您要重新填充你的列表視圖中使用不同的陣列。

web和web2是兩個不同的陣列。

如果要更新，更新Web陣列，並呼籲notifyDataSetChanged您的適配器上刷新列表視圖

來源

2014-01-12 07:37:32 Raghunandan

你沒有更新你的網絡陣列：

public class MainActivity extends Activity { 

    MyListActivity adapter; 
    ListView list; 

    String[] web = { 
      "jerry", 
      "walters" 
    } ; 
    Integer[] imageId = { 
      R.drawable.ic_launcher, 
      R.drawable.ic_launcher  
    }; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     adapter = new MyListActivity(MainActivity.this, web, imageId); 
     list=(ListView)findViewById(R.id.listView1); 
     list.setAdapter(adapter); 
     list.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
      @Override 
      public void onItemClick(AdapterView<?> parent, View view,int position, long id) { 
       Toast.makeText(MainActivity.this, "You Clicked at " +web[position], Toast.LENGTH_SHORT).show(); 
      } 
     }); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.main, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 

     switch (item.getItemId()) { 

      case R.id.action_settings: 
       web = {//<--------------just update we array as well 
         "walters", 
         "jerry" 
       } ; 
       adapter = new MyListActivity(MainActivity.this, web, imageId); 
       list.setAdapter(adapter); 
       return true; 
     } 
     return false; 
    } 
}

來源

2014-01-12 07:37:06

我想這可能是因爲網絡和web2有這導致了不同的答案順序不同？

String[] web = { "jerry", "walters"} ; 

    String[] web2 = {"walters", "jerry" } ;

來源

2014-01-12 07:45:35

錯誤的項目被選中

回答

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