本文实例讲述了android编程开发之seekbar采用handler消息处理操作的方法。分享给大家供大家参考，具体如下：
该案例简单实现进度条可走，可拖拽的功能，下面请看源码：
布局文件：
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<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"
android:paddingbottom="@dimen/activity_vertical_margin"
android:paddingleft="@dimen/activity_horizontal_margin"
android:paddingright="@dimen/activity_horizontal_margin"
android:paddingtop="@dimen/activity_vertical_margin"
tools:context=".mainactivity" >
<seekbar
android:id="@+id/seekbar1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignparentleft="true"
android:layout_alignparenttop="true" />
</relativelayout>
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java文件：
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package com.example.lession16_seekbar;
import android.os.bundle;
import android.os.handler;
import android.os.message;
import android.app.activity;
import android.view.menu;
import android.widget.seekbar;
public class mainactivity extends activity {
private seekbar seekbar;
private static final int max_progress =100;
private int current_progress=10;
private static final int pro=1;
private handler handler;
@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_main);
seekbar = (seekbar) this.findviewbyid(r.id.seekbar1);
seekbar.setmax(max_progress);
/* new thread(new runnable() {
@override
public void run() {
while(true){
try {
thread.sleep(600);
current_progress+=10;
seekbar.setprogress(current_progress);
} catch (interruptedexception e) {
// todo auto-generated catch block
e.printstacktrace();
}
}
}
}).start();*/
handler = new handler(){
@override
public void handlemessage(message msg) {
super.handlemessage(msg);
switch (msg.what) {
case pro:
if(current_progress>=max_progress){
}else{
current_progress+=1;
seekbar.incrementprogressby(1);
handler.sendemptymessagedelayed(pro, 600);
}
break;
default:
break;
}
}
};
current_progress=current_progress>0?current_progress:0;
seekbar.setprogress(current_progress);
handler.sendemptymessage(pro);
}
@override
public boolean oncreateoptionsmenu(menu menu) {
// inflate the menu; this adds items to the action bar if it is present.
getmenuinflater().inflate(r.menu.main, menu);
return true;
}
}
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效果图（自动走）：
希望本文所述对大家android程序设计有所帮助。