不要更改 listView 上的名称

Question

我在 Activity A 中有一个 listView，如下所示。所有的值和名称实际上都是 return 从 Activity C 到 B 然后只有 A.

单击第一个列表时，它应该在 editText B 上显示文本 Project 和值 3。但它显示的 Medical 实际上是从最后一个列表。

我把值从3改成43，return改成A后，名字就变了。我应该怎么做才能使名称保持不变？

Activity一个

      ArrayAdapter<String> adapter;
      ArrayList<String> m_listItems = new ArrayList<String>();
      int mClickedPosition;
      adapter=new ArrayAdapter<String (getActivity(),R.layout.claims,R.id.textView1,m_listItems);
     listV = (ListView) claims.findViewById(R.id.listView1);

               listV.setOnItemClickListener(new AdapterView.OnItemClickListener() {  // if list clicked
            public void onItemClick(AdapterView<?> listView, View view,
                                    int position, long id) {
                mClickedPosition = position;


                if (name.equals("Project")) {
                    String temp[] = m_listItems.get(position).split("\s\s+");
                    result = temp[temp.length - 1].trim();
                    result = result.replace("RM","");
                    Intent intent = new Intent(Claims1.this.getActivity(), Project1.class);
                    intent.putExtra("bitmap", true);
                    intent.putExtra("name", name);
                    intent.putExtra("result", result);
                    startActivityForResult(intent, 0);
                    Log.e("RESULT", "Result= " + result);
                }
                else if(name.equals("Medical"))
                {
                    String temp[] = m_listItems.get(position).split("\s\s+");
                    result = temp[temp.length - 1].trim();
                    result = result.replace("RM","");
                    Intent intent = new Intent(Claims1.this.getActivity(), Medical.class);
                    intent.putExtra("bitmap", true);
                    intent.putExtra("name", name);
                    intent.putExtra("result", result);
                    startActivityForResult(intent, 1);
                }
            }
        });
        return claims;
       }


   @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        switch (requestCode) {
            case 0:  // for Project
                result = data.getStringExtra("text"); //get from B
                name = data.getStringExtra("a");
                description = data.getStringExtra("c");
                as = Long.parseLong(result);
                Log.d("FIRST", "result:" + result);
                Text = "  " + name + "                                  " + "RM" + result + "";
                if (mClickedPosition == -1) { // if is icon button clicked
                    m_listItems.add(Text);

                } else {
                    m_listItems.set(mClickedPosition, Text);

                }
                adapter.notifyDataSetChanged();
                listV.setAdapter(adapter);
                break;

            case 1:  // for Medical
                result = data.getStringExtra("text");
                name = data.getStringExtra("a");
                description = data.getStringExtra("c");
                as = Long.parseLong(result);
                Log.d("FIRST", "result:" + result);
                Text = "  " + name + "                                  " + "RM" + result + "";
                // m_listItems.clear();
                if (mClickedPosition==-1)
                {
                    m_listItems.add(Text);

                }
                else
                {
                    m_listItems.set(mClickedPosition, Text);

                }
                adapter.notifyDataSetChanged();
                listV.setAdapter(adapter);
                break;

Activity B（项目 1）

   if(getIntent().getExtras()!=null) { //if  has value pass from A
            final String Amount = getIntent().getExtras().getString("result");
            final String description1 = getIntent().getExtras().getString("description");
            txt1.setText(description1);
            txt.setText(Amount);
        }

                b.setOnClickListener(new View.OnClickListener() {  // return to A
                    public void onClick(View arg0) {
                        Intent returnIntent = new Intent();
                        a = "Project";
                        text = txt.getText().toString(); // amount
                        returnIntent.putExtra("text", text);
                        returnIntent.putExtra("a", a);
                        returnIntent.putExtra("c", c); // receive from Activity C
                        setResult(Activity.RESULT_OK, returnIntent);
                       finish();
                    }
                });
                       viewImage.setImageBitmap(Global.img); // receive from C
                  }

注意到 A 中的 result 代表值 3,5 而 name 代表项目和医疗

Answer 1

以下是您要在 listview

中填充的自定义对象

MyItem.java

public class MyItem {

    private String name;

    private String something;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getSomething() {
        return something;
    }

    public void setSomething(String something) {
        this.something = something;
    }
}

单个项目的布局ListView这是文件名my_single_item.xml下面是布局的内容

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

    <TextView
        android:id="@+id/text_first"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_weight="0.60"
        android:gravity="center"
        android:padding="4dp"
        android:textColor="#000"
        android:textSize="18sp" />

    <TextView
        android:id="@+id/text_second"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_weight="0.60"
        android:gravity="center"
        android:padding="4dp"
        android:textColor="#000"
        android:textSize="18sp" />

</LinearLayout>

这是一个适配器，它将通过使单个项目

在 listview 中填充 MyItems 的基础列表

MyAdapter.java

import java.util.ArrayList;

/**
 * Created by Pankaj Nimgade on 18-11-2015.
 */
public class MyAdapter extends ArrayAdapter {

    private LayoutInflater layoutInflater;
    private ArrayList<MyItem> myItems;

    public MyAdapter(Context context, int resource, ArrayList<MyItem> myItems) {
        super(context, resource, myItems);
        layoutInflater = LayoutInflater.from(context);
        this.myItems = myItems;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View view = layoutInflater.inflate(R.layout.my_single_item, parent, false);
        TextView name = (TextView) view.findViewById(R.id.text_first);
        TextView something = (TextView) view.findViewById(R.id.text_second);
        MyItem myItem = myItems.get(position);
        name.setText("" + myItem.getName());
        something.setText("" + myItem.getSomething());
        return view;
    }
}

将此代码写入您的 activity

listView = (ListView) findViewById(R.id.myListView);
ArrayList<MyItem> myItems = new ArrayList<>();

for (int i = 0; i < 5; i++) {
    MyItem myItem = new MyItem();
    myItem.setName("Name_" + i);
    myItem.setSomething("RM_" + i);
    myItems.add(myItem);
}

MyAdapter myAdapter = new MyAdapter(this, android.R.layout.simple_list_item_1, myItems);
listView.setAdapter(myAdapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        MyItem myItem = (MyItem)listView.getItemAtPosition(position);
        Toast.makeText(getApplicationContext(), ""+myItem.getName(), Toast.LENGTH_SHORT).show();
    }
});

确保您确实在此活动布局中添加了一个列表视图

 <ListView
        android:id="@+id/myListView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"></ListView>

您会看到 toast 将与您要单击的项目匹配现在使用此对象并将其传递给您想要的任何 activity，它将具有您单击的值

不要更改 listView 上的名称

Don't change the name on the listView

java

android

listview

android-listview