The seekbar of the development of Android programming using handler Message processing operation method _android

The example of this article describes the development of Android programming Seekbar using handler message processing operations. Share to everyone for your reference, specific as follows:

This case simple implementation progress bar can go, can drag and drop function, below see source code:

Layout file:

<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>

Java files:

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 = newHandler () {@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 the items to the action Bar if
  It is present.
  Getmenuinflater (). Inflate (R.menu.main, menu);
 return true;

 }
}

Effect Diagram (Automatic walk):

I hope this article will help you with the Android program.