Android如何一个接一个地在一个活动中显示2个列表视图

Question

我已经使用此代码在另一个上面显示了2个列表视图.

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<ListView
    android:id="@+id/listView1"
    android:layout_width="match_parent"
    android:layout_height="fill_parent"
    android:layout_weight="1"
    android:background="#f00" >
</ListView>

<ListView
    android:id="@+id/listView2"
    android:layout_width="match_parent"
    android:layout_height="fill_parent"
    android:layout_weight="1"
    android:background="#0f0" >
</ListView>

问题是,这导致每个列表视图占据屏幕的一半.我正在为这两个列表添加一个标题.

LevelAdapter adapter = new LevelAdapter(getActivity(),
            R.layout.list_item, weather_data);

    View header = inflater.inflate(R.layout.header2, null);
    View header2 = inflater.inflate(R.layout.header, null);
   lv1.addHeaderView(header);
   lv2.addHeaderView(header2);
    lv1.setAdapter(adapter);
    lv2.setAdapter(adapter);

我想在第一个列表结束后出现第二个列表的标题.我该怎么做？如何使列表视图出现,以便第一个在第一个结束时开始？谢谢

Answer 1

activity_main.xml中

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:fillViewport="true" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:padding="10dip" >

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:gravity="center_vertical"
            android:text="ANDROID" />

        <ListView
            android:id="@+id/listView1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dip"
            android:background="#B29090" >
        </ListView>

        <TextView
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dip"
            android:gravity="center_vertical"
            android:text="IOS" />

        <ListView
            android:id="@+id/listView2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dip"
            android:background="#4A9C67" >
        </ListView>
    </LinearLayout>

</ScrollView>

MainActivity.java

package com.example.listviewin1xmldemo;

import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.View;
import android.view.View.MeasureSpec;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;

public class MainActivity extends ActionBarActivity {

    private ListView mListView1, mListView2;

    private String [] data1 ={"Hiren", "Pratik", "Dhruv", "Narendra", "Piyush", "Priyank"};
    private String [] data2 ={"Kirit", "Miral", "Bhushan", "Jiten", "Ajay", "Kamlesh"};

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

        mListView1 = (ListView)findViewById(R.id.listView1);
        mListView2 = (ListView)findViewById(R.id.listView2);

        mListView1.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, data1));
        mListView2.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, data2));

        ListUtils.setDynamicHeight(mListView1);
        ListUtils.setDynamicHeight(mListView2);
    }


    public static class ListUtils {
        public static void setDynamicHeight(ListView mListView) {
            ListAdapter mListAdapter = mListView.getAdapter();
            if (mListAdapter == null) {
                // when adapter is null
                return;
            }
            int height = 0;
            int desiredWidth = MeasureSpec.makeMeasureSpec(mListView.getWidth(), MeasureSpec.UNSPECIFIED);
            for (int i = 0; i < mListAdapter.getCount(); i++) {
                View listItem = mListAdapter.getView(i, null, mListView);
                listItem.measure(desiredWidth, MeasureSpec.UNSPECIFIED);
                height += listItem.getMeasuredHeight();
            }
            ViewGroup.LayoutParams params = mListView.getLayoutParams();
            params.height = height + (mListView.getDividerHeight() * (mListAdapter.getCount() - 1));
            mListView.setLayoutParams(params);
            mListView.requestLayout();
        }
    }
}

Answer 2

使用像这样:

删除线性布局.使用相对布局,在里面放置你的两个列表视图.

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/scrollojt"
android:fillViewport="true" >

   <RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >

<ListView
android:id="@+id/listView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#f00" >
 </ListView>

 <ListView
android:id="@+id/listView2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/listView1"
android:background="#0f0" >
</ListView>
    </RelativeLayout>
  </ScrollView>

添加Utility.java

public class Utility {

    public static void setListViewHeightBasedOnChildren(ListView listView) {
        ListAdapter listAdapter = listView.getAdapter();
        if (listAdapter == null) {
            // pre-condition
            return;
        }

        int totalHeight = 0;
        int desiredWidth = MeasureSpec.makeMeasureSpec(listView.getWidth(), MeasureSpec.AT_MOST);
        for (int i = 0; i < listAdapter.getCount(); i++) {
            View listItem = listAdapter.getView(i, null, listView);
            listItem.measure(desiredWidth, MeasureSpec.UNSPECIFIED);
            totalHeight += listItem.getMeasuredHeight();
        }

        ViewGroup.LayoutParams params = listView.getLayoutParams();
        params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
        listView.setLayoutParams(params);
        listView.requestLayout();
    }
}

在您的活动中:

 lv1.setAdapter(adapter);
 lv2.setAdapter(adapter);

Utility.setListViewHeightBasedOnChildren(lv1);
Utility.setListViewHeightBasedOnChildren(lv2);

Answer 3

你应该使用ExpandableListView(http://developer.android.com/reference/android/widget/ExpandableListView.html).您将有两个部分而不是两个列表视图,但它们(包括标题)将按照您的描述进行对齐.

Answer 4

在单个容器中使用多个ListViews并不是一个好习惯.它会导致测量和性能问题.更好的是使用具有多种视图类型的单个ListView .在您的案例中,视图类型可以是:listview1_viewtype,listview2_viewtype,listview2_header_viewtype.对于第一个ListView的标题,您可以使用标题.