当我们直接在布局文件中写三个listview的时候，会出现三个滚动条，并且每个listview都只显示一个item，要改动才显示更多。怎么做才好了？
办法是有得：用一个ScrollView包含一个大布局，然后把这三个listview加到里面去。
新建一个布局文件：
<?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:layout_height="fill_parent"
android:orientation="vertical" >
<ScrollView
android:id="@+id/scrollview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:fadingEdge="none"
android:scrollbars="vertical">
<LinearLayout
android:id="@+id/linearlayout"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
</LinearLayout>
</ScrollView>
</LinearLayout>
一个Java文件：
package com.test;
import java.util.ArrayList;
import java.util.HashMap;
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.ViewGroup.LayoutParams;
import android.view.Window;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.ScrollView;
import android.widget.TextView;
import com.listviewtest.R;
/**
* 三个Listview共享一个滚动条
* @author mark
*
*/
public class MainActivity extends Activity{
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);// 去掉标题栏
setContentView(R.layout.main);
initView();
addFirstListview();
addSecondListview();
addThirdListview();
//scrollView.addView(all);
}
ScrollView scrollView;
LinearLayout all;
private void initView() {
LayoutInflater inflater = LayoutInflater.from(MainActivity.this);
//LinearLayout linearLayout = (LinearLayout) inflater.inflate(R.layout.main, null);
//layout_topic = (LinearLayout) linearLayout.findViewById(R.id.linearlayout);
all = (LinearLayout) findViewById(R.id.linearlayout);
scrollView = (ScrollView) findViewById(R.id.scrollview);
}
private void addFirstListview( ){
TextView textView = new TextView(MainActivity.this);
textView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
textView.setText("第一个列表");
textView.setGravity(Gravity.LEFT);
textView.setTextSize(18);
textView.setTextColor(Color.BLACK);
all.addView(textView);
ArrayList<HashMap<String, Object>> arraylist = new ArrayList<HashMap<String, Object>>(); // 生成动态数组
HashMap<String, Object> map;
for (int i = 1; i <= 10; i ++) {
map = new HashMap<String, Object>();
map.put("text", "text" + i );
arraylist.add(map);
}
ListViewAdapter listViewAdapter = new ListViewAdapter(MainActivity.this, arraylist);
ListView listView = new ListView(MainActivity.this);
int height = arraylist.size() * (int) getResources().getDimension(R.dimen.listview_item_height);
listView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, height));
listView.setDividerHeight(1);
listView.setAdapter(listViewAdapter);
all.addView(listView);
}
private void addSecondListview( ){
TextView textView = new TextView(MainActivity.this);
textView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
textView.setText("第二个列表");
textView.setGravity(Gravity.LEFT);
textView.setTextSize(18);
textView.setTextColor(Color.BLACK);
all.addView(textView);
ArrayList<HashMap<String, Object>> arraylist = new ArrayList<HashMap<String, Object>>(); // 生成动态数组
HashMap<String, Object> map;
for (int i = 11; i <= 20; i ++) {
map = new HashMap<String, Object>();
map.put("text", "text" + i );
arraylist.add(map);
}
ListViewAdapter listViewAdapter = new ListViewAdapter(MainActivity.this, arraylist);
ListView listView = new ListView(MainActivity.this);
int height = arraylist.size() * (int) getResources().getDimension(R.dimen.listview_item_height);
listView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, height));
listView.setDividerHeight(1);
listView.setAdapter(listViewAdapter);
all.addView(listView);
}
private void addThirdListview( ){
TextView textView = new TextView(MainActivity.this);
textView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
textView.setText("第三个列表");
textView.setGravity(Gravity.LEFT);
textView.setTextSize(18);
textView.setTextColor(Color.BLACK);
all.addView(textView);
ArrayList<HashMap<String, Object>> arraylist = new ArrayList<HashMap<String, Object>>(); // 生成动态数组
HashMap<String, Object> map;
for (int i = 21; i <= 30; i ++) {
map = new HashMap<String, Object>();
map.put("text", "text" + i );
arraylist.add(map);
}
ListViewAdapter listViewAdapter = new ListViewAdapter(MainActivity.this, arraylist);
ListView listView = new ListView(MainActivity.this);
int height = arraylist.size() * (int) getResources().getDimension(R.dimen.listview_item_height);
listView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, height));
listView.setDividerHeight(1);
listView.setAdapter(listViewAdapter);
all.addView(listView);
}
}
其中设置listview的高度是重点。
项目源代码在这里，需要可以下载