android - 将 ListView 行最小化为一行

Question

我正在使用 ListView 显示来自数据库的消息..当我添加一条消息时获取所有字符串并显示在 ListView 上..这是我的 xml 文件和 java..我需要使用“...”在每行的单行中获取消息。我研究了这个问题，我发现，输入 android:singleLine="true"在 TextView 中，但我不知道它们在 TextView 中是什么意思。因为我正在使用 ListView 。请帮助。

<?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="match_parent"
    android:orientation="vertical"
    android:background="@drawable/wave" >

    <ListView
        android:id="@+id/list"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/SearchMessageExit"
        android:focusableInTouchMode="true"
         >

    </ListView>

</LinearLayout>

消息.java

    public void detailsOfMessage(){
        try{
            Database_message info = new Database_message(this);
            String data = info.getData();
            info.close();

            if(data.equals(""))
            {
                Toast.makeText(getApplicationContext(), "Empty Message", Toast.LENGTH_LONG).show();
            }


            StringTokenizer token = new StringTokenizer(data,"\t");
            int rows = token.countTokens();

            classes = new String[rows];

            int i=0;

            while (token.hasMoreTokens())
            {
                classes[i]=token.nextToken();
                i++;
            }


        listView = (ListView) findViewById(R.id.list);
        listView.setOnItemClickListener(this);
        listView.setOnLongClickListener(this);

        inAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1,0);
        listView.setAdapter(inAdapter);


        for (int r = 0; r < classes.length; r++) {
            inAdapter.add(classes[r]);
        }
        }catch(Exception e){

            Toast.makeText(getApplicationContext(), "Empty Message", Toast.LENGTH_LONG).show();
        }
    }   

Answer 1

您正在为 ListView 项目使用默认布局 android.R.layout.simple_list_item_1。而是使用启用单行的 TextView 创建一个布局。并将其传递给 ListView 。并为 ListView 使用自定义数组适配器。

这样做:创建列表项 View XMLlistview_item_row.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal" 
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:padding="10dp">

     <TextView android:id="@+id/txtTitle"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:gravity="center_vertical"
        android:layout_alignParentTop="true"
        android:layout_alignParentBottom="true"
        android:textStyle="bold"
        android:textSize="22dp"
        android:textColor="#000000"
        android:layout_marginTop="5dp"
        android:layout_marginBottom="5dp" />

</LinearLayout>

一类喜欢

Weather.java

public class Weather {

    public String title;
    public Weather(){
        super();
    }

    public Weather(String title) {
        super();

        this.title = title;
    }
}

然后创建数组适配器类

public class WeatherAdapter extends ArrayAdapter<Weather>{

    Context context; 
    int layoutResourceId;    
    Weather data[] = null;

    public WeatherAdapter(Context context, int layoutResourceId, Weather[] data) {
        super(context, layoutResourceId, data);
        this.layoutResourceId = layoutResourceId;
        this.context = context;
        this.data = data;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View row = convertView;
        WeatherHolder holder = null;

        if(row == null)
        {
            LayoutInflater inflater = ((Activity)context).getLayoutInflater();
            row = inflater.inflate(layoutResourceId, parent, false);

            holder = new WeatherHolder();
            holder.txtTitle = (TextView)row.findViewById(R.id.txtTitle);

            row.setTag(holder);
        }
        else
        {
            holder = (WeatherHolder)row.getTag();
        }

        Weather weather = data[position];
        holder.txtTitle.setText(weather.title);

        return row;
    }

    static class WeatherHolder
    {
        TextView txtTitle;
    }
}

并在您的 Activity 中这样使用:

Weather weather_data[] = new Weather[]
        {
            new Weather("Cloudy"),
            new Weather("Showers"),
            new Weather("Snow"),
            new Weather("Storm"),
            new Weather("Sunny")
        };

        WeatherAdapter adapter = new WeatherAdapter(this, 
                R.layout.listview_item_row, weather_data);

        listView1.setAdapter(adapter);

希望对您有所帮助!!!