Question

这是我第一次使用ArrayAdapter创建ListView。

但我不知道如何显示第二根弦（A，B，C ......）？

我认为我必须在主java文件中添加一些东西，但是我已经＆＃39;不知道要添加什么？

这是我目前的代码：

    import android.app.Activity;
    import android.os.Bundle;
    import android.widget.ListAdapter;
    import android.widget.ListView;

   public class equipements extends Activity {

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_equipements);
    String[] tools_names = {"1" , "2" , "3" , "4" , "5" };
    String[] tools_def = {"A" , "B" , "C" , "D" , "E" };
    ListAdapter testAdapter = new eq_custom_adapter(this , tools_names);
    ListAdapter testAdapter1 = new eq_custom_adapter(this , tools_def);
    ListView test = (ListView)findViewById(R.id.eq_listView);
    test.setAdapter(testAdapter);
    test.setAdapter(testAdapter1);
}}

这是我的适配器

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;;
import android.widget.ArrayAdapter;
import android.widget.TextView;
import android.widget.ImageView;

class eq_custom_adapter extends ArrayAdapter<String>{


eq_custom_adapter(Context context,String [] tools) {
    super(context,R.layout.equipments_view ,tools);
}
@Override
public View getView(int position, View convertView,  ViewGroup parent) {
    LayoutInflater inflater1 =  LayoutInflater.from(getContext());
    View customView = inflater1.inflate(R.layout.equipments_view , parent , false);

    String tool = getItem(position);
    String tool_defs = getItem(position);
    TextView tool_name = (TextView) customView.findViewById(R.id.tool_name);
    TextView tool_def = (TextView) customView.findViewById(R.id.tool_def);
    ImageView tool_image = (ImageView) 
    customView.findViewById(R.id.tool_image);

    tool_name.setText(tool);
    tool_def.setText(tool_defs);
    switch (position) {
        case 0:
            tool_image.setImageResource(R.drawable.a);
            break;
        case 1:
            tool_image.setImageResource(R.drawable.b);
            break;
        case 2:
            tool_image.setImageResource(R.drawable.c);
            break;
        case 3:
            tool_image.setImageResource(R.drawable.d);
        case 4:
            tool_image.setImageResource(R.drawable.e);
            break;
    }
    return customView;
}

Answer 1

你不需要2个你需要的适配器1.所以改变代码如下所示 -

String[] tools_names = {"1" , "2" , "3" , "4" , "5" };
String[] tools_def = {"A" , "B" , "C" , "D" , "E" };
ListAdapter testAdapter = new eq_custom_adapter(this , tools_names);
ListView test = (ListView)findViewById(R.id.eq_listView);
test.setAdapter(testAdapter);

这会将您的适配器设置为数组。理想情况下，不建议使用2个数组来填充一个适配器。所以你应该有自定义对象的数组。但是对于这种情况，我将解释你如何做到这一点。更改您的getView方法，如下所示 -

@Override
public View getView(int position, View convertView,  ViewGroup parent) {
    LayoutInflater inflater1 =  LayoutInflater.from(getContext());
    View customView = inflater1.inflate(R.layout.equipments_view , parent , false);


String tool = tools_names[position]; // change here to get from 1st array
String tool_defs = tools_def[position]; // change here to get from 2nd array
TextView tool_name = (TextView) customView.findViewById(R.id.tool_name);
TextView tool_def = (TextView) customView.findViewById(R.id.tool_def);
ImageView tool_image = (ImageView) 
customView.findViewById(R.id.tool_image);

tool_name.setText(tool);
tool_def.setText(tool_defs);
switch (position) {
    case 0:
        tool_image.setImageResource(R.drawable.a);
        break;
    case 1:
        tool_image.setImageResource(R.drawable.b);
        break;
    case 2:
        tool_image.setImageResource(R.drawable.c);
        break;
    case 3:
        tool_image.setImageResource(R.drawable.d);
    case 4:
        tool_image.setImageResource(R.drawable.e);
        break;
}
return customView;
}

未来更好的方式： 正如我之前所说，理想情况下你不应该这样做。如果您要显示多个数据，请创建一个类 -

class Tool{
String toolName;
String toolDef;
 int toolImageId;

 public String getToolName() {
     return toolName;
 }

 public void setToolName(String toolName) {
     this.toolName = toolName;
 }

 public String getToolDef() {
     return toolDef;
 }

 public void setToolDef(String toolDef) {
     this.toolDef = toolDef;
 }

 public int getToolImageId() {
     return toolImageId;
 }

 public void setToolImageId(int toolImageId) {
     this.toolImageId = toolImageId;
 }
 }

然后创建此类的对象数组，然后从中填充列表视图。你可以在Google上获得很多有关此内容的教程。

我的ArrayAdapter dosn在ListView中显示另一个字符串

1 个答案: