Question

我有一个Java类和两个XML文件，它们基本上只是一个并排的listView，它接受一些值。我想在每个列表视图上方放置一个标题或文本视图（它们应该并排放置）但是每次我尝试添加一个textView时，整个项目都会混乱并且跟随在线指令不能实现标题。

 public class Leaderboard extends AppCompatActivity {
        private ListView UsernameList;
        private ListView ScoreList;

    LocalDatabase localDatabase;

    /** Called when the activity is first created */
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_leaderboard);

        ArrayAdapter<String> listAdapter;
        ArrayAdapter<Integer> list2Adapter;

        //Find the ListView resources
        UsernameList = (ListView) findViewById(R.id.UsernameList);
        ScoreList = (ListView) findViewById(R.id.ScoreList);

        //Create and populate the list of usernames.
        //This is where the information from the Database would need to be entered. and the String[] removed
        String[] usernames = new String[]{"Andy", "Marie", "George"};
        ArrayList<String> usernameList = new ArrayList<String>();
        usernameList.addAll(Arrays.asList(usernames));

        //Create and populate the list of scores
        //This is where the information from the Database would need to be entered. and the Integer[] removed
        Integer[] scores = new Integer[]{7, 4, 1};
        ArrayList<Integer> scoreList = new ArrayList<Integer>();
        scoreList.addAll(Arrays.asList(scores));

        //adds the users details to the leaderboard
        localDatabase = new LocalDatabase(this);
        Contact contact = localDatabase.getLoggedInUser();
        //Set a string to have the value of the users name.
        String s = contact.name;
        //Create Array Adapter using the username list
        listAdapter = new ArrayAdapter<String>(this, R.layout.activity_row, usernameList);
        //Add more users
        listAdapter.add(s);
        //Set the Array Adapter as the ListView's adapter
        UsernameList.setAdapter(listAdapter);

        //Create Array Adapter using the username list
        list2Adapter = new ArrayAdapter<Integer>(this, R.layout.activity_row, scoreList);
        //Add more users
        list2Adapter.add(0);
        //Set the Array Adapter as the ListView's adapter
        ScoreList.setAdapter(list2Adapter);
    }
}

然后是两个xml文件

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:background="@color/colorPrimaryDark"
    android:id="@+id/rowTextView"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:textColor="@color/white"
    android:textStyle="bold"
    android:padding="10dp"
    android:textSize="16sp">
</TextView>



<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:background="@color/colorPrimaryDark"
    android:layout_height="fill_parent"
    android:padding="20dp"
    android:orientation="horizontal"
    tools:context=".Leaderboard">

    <ListView
        android:id="@+id/UsernameList"
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_margin="2dp"
        android:layout_weight=".60"
        android:drawSelectorOnTop="false"
        android:headerDividersEnabled="false">
    </ListView>

    <ListView
        android:id="@+id/ScoreList"
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_margin="2dp"
        android:layout_weight=".40">
    </ListView>
</LinearLayout>

Answer 1

尝试在LinearLayout中封装两个TextView。线性布局应该跨越整个宽度（match_parent），但只能尽可能高; WRAP_CONTENT。

如果要将它们整齐地划分在屏幕宽度之间，那么首先要将LinearLayout方向设置为水平。然后，你创建TextViews 0dp（正确，0dp）和它们的高度wrap_content的宽度。然后，给两个TextViews赋予权重1.现在，视图占据了LinearLayout的一半空间（宽度）。最后，将TextView放在一个好看的标题中。

我保持它非常广泛且非编码，但我认为如果遇到任何麻烦，你应该能够谷歌上面解释的所有概念。如果你真的无法弄明白，我会在评论中帮助你。

在2个列表视图上方添加标题/ TextView

1 个答案: