覆盖getview方法为listview自定义适配器后，在listview中看不到任何东西

Question

我是新的android编程。我正在编写一个安卓程序，它有两个选项卡：detailstab，用户填写表单并点击保存按钮。其中显示用户在详细信息选项卡中的edittexts控件中插入的内容。实现这个我做了这个类：

详细的java类：

public class detail { 


public String name; 
public String adr; 
public String note; 
public int radioValue; 

} 

信息活动课中，我做出一个ArrayList和细节添加对象：

public class details extends Activity { 

public ArrayList<detail> detaillist=new ArrayList<detail>(); 
public EditText etName; 
public EditText etAdr; 
public EditText etNote; 
public RadioGroup rg; 
public RadioButton rb_0; 
public RadioButton rb_1; 
public RadioButton rb_2; 

static details detailsActivity; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 

    detailsActivity=this; 
    setContentView(R.layout.details_tab); 



    Button btnSave=(Button) findViewById(R.id.button1); 
    //define an arraylist to add detail object to it 

    etName=(EditText) findViewById(R.id.editText1); 
    etAdr=(EditText) findViewById(R.id.editText2); 
    etNote=(EditText) findViewById(R.id.editText3); 
    rg=(RadioGroup) findViewById(R.id.radioGroup1); 
    rb_0=(RadioButton) findViewById(R.id.radio0); 
    rb_1=(RadioButton) findViewById(R.id.radio1); 
    rb_2=(RadioButton) findViewById(R.id.radio2); 



    btnSave.setOnClickListener(new View.OnClickListener() { 

     @Override 
     public void onClick(View arg0) { 

      final detail d=new detail(); 
      makeDetailList(d); 













     } 
    }); 

} 

public void clear(EditText et) { 

et.setText(""); 

} 
public ArrayList<detail> makeDetailList(detail d){ 



    d.name=etName.getText().toString(); 
     d.adr=etAdr.getText().toString(); 




     if(rb_0.isSelected()) 
     { 
      d.radioValue=0; 

     } 
     else if (rb_1.isSelected()) 
     { 
      d.radioValue=1; 

     } 
     else if (rb_1.isSelected()) 
     { 
      d.radioValue=2; 

     } 


     detaillist.add(d); 

    return detaillist; 

} 


public static details getInstance(){ 
     return detailsActivity; 
    } 

最后列出活动课此类包含显示详细信息选项卡中的数据的列表视图：

 public class list extends Activity { 


@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.list_tab); 

    ListView lv=(ListView) findViewById(R.id.listView1); 

    MyAdapter adapter=new MyAdapter(this,android.R.layout.simple_list_item_1 , 
      R.id.textView1, 
      details.getInstance().detaillist); 

    lv.setAdapter(adapter); 

(this,R.layout.my_list,R.id.textView1,R.id.textView2,)); 
} 
private class MyAdapter extends ArrayAdapter<String>{ 

     public MyAdapter(Context context, int resource, int textViewResourceId, 
       ArrayList<detail> detaillist) { 
      super(context, resource, textViewResourceId); 

     } 
     @Override 
     public View getView(int position, View convertView, ViewGroup parent) { 

      LayoutInflater inflater=(LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
      View row=inflater.inflate(R.layout.my_list, parent,false); 
      ArrayList<detail> items=details.getInstance().detaillist; 

      ImageView ivR=(ImageView)  row.findViewById(R.id.imageView1); 
      TextView tvN=(TextView) row.findViewById(R.id.textView1); 
      TextView tvA=(TextView) row.findViewById(R.id.textView2); 

      tvN.setText(items.get(position).name); 
      tvA.setText(items.get(position).adr); 

      if(items.get(position) != null) 
      { 
       if(items.get(position).radioValue==0) 
       { 
        ivR.setImageResource(R.drawable.t); 
       } 
       else if(items.get(position).radioValue==1) 
       { 
        ivR.setImageResource(R.drawable.t); 
       } 
       else if(items.get(position).radioValue==2) 
       { 
        ivR.setImageResource(R.drawable.t); 
       } 
      } 



      return row; 
     } 
    } 
} 

，这是my_list.xml

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="match_parent" 
android:layout_height="match_parent" > 

<ImageView 
    android:id="@+id/imageView1" 
    android:layout_width="50dp" 
    android:layout_height="50dp" 
    android:layout_alignParentLeft="true" 
    android:layout_alignParentTop="true" 
    android:layout_marginLeft="29dp" 
    android:layout_marginTop="24dp" 
    android:src="@drawable/ic_launcher" /> 

<TextView 
    android:id="@+id/textView2" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignLeft="@+id/textView1" 
    android:layout_below="@+id/textView1" 
    android:text="TextView" 
    android:textColor="#687EFC" 
    android:textSize="20sp" /> 

<TextView 
    android:id="@+id/textView1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_alignTop="@+id/imageView1" 
    android:layout_marginLeft="31dp" 
    android:layout_toRightOf="@+id/imageView1" 
    android:text="TextView" 
    android:textColor="#18277D" 
    android:textSize="30sp" /> 

</RelativeLayout> 

我真的很感谢你的帮助 问候

Answer 1

更改

private class MyAdapter extends ArrayAdapter<String> 

到

private class MyAdapter extends ArrayAdapter<detail> 

而且改变

super(context, resource, textViewResourceId); 

到

super(context, resource, textViewResourceId, detaillist); 

你也应该了解更多关于适配器。检查 answer