Android HorizontalScrollView 点滴

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Android HorizontalScrollView点滴

1、HorizontalScrollView是只能有一个Child。

package com.example.mytest;import android.app.ActionBar.LayoutParams;import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.widget.Button;import android.widget.HorizontalScrollView;import android.widget.LinearLayout;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);

<span style="white-space:pre"></span>//正确的添加多个Button<span style="white-space:pre"></span>/*final LinearLayout layout2=new LinearLayout(this);//定义一个新的LinearLayoutlayout2.setOrientation(LinearLayout.HORIZONTAL);//设置为水平for(int i=0;i<6;i++) //向LinearLayout中添加按钮{Button button=new Button(this);button.setId(i);button.setText("i"+i);layout2.addView(button);}HorizontalScrollView horizontalscrollview=(HorizontalScrollView)findViewById(R.id.hds);horizontalscrollview.addView(layout2);//向水平滚动条中添加LinearLayout*/

<span style="white-space:pre"></span>//错误的添加方法

<span style="white-space:pre"></span>/*HorizontalScrollView hsv=(HorizontalScrollView)findViewById(R.id.hds);Button btn = new Button(this); btn.setText("第一个");//LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); //hsv.addView(btn,params); hsv.addView(btn); Button btn2 = new Button(this);  btn2.setText("第二个"); hsv.addView(btn1);

<span style="white-space:pre"></span>*/

}}

2、布局文件

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="${relativePackage}.${activityClass}" >        <HorizontalScrollView      android:id="@+id/hds"     android:layout_height="wrap_content"android:layout_width="fill_parent"android:scrollbarAlwaysDrawHorizontalTrack="false"></HorizontalScrollView>        </RelativeLayout>

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