Android_mars Study Notes _s01 original version _023_mp3player003_ play mp3

First, Introduction

1. When the click Entry is implemented in Onlistitemclick, jump to playeractivity,mp3info via intent to Playeractivity

2.PlayerActivity playback via Android.media.MediaPlayer, pause, stop

Second, the Code
1.xml
(1) Player.xml

1<?xml version= "1.0" encoding= "Utf-8"?>2<linearlayout xmlns:android= "Http://schemas.android.com/apk/res/android"3Android:layout_width= "Fill_parent" android:layout_height= "Fill_parent"4android:orientation= "Horizontal" android:paddingleft= "10dip"5android:paddingright= "10dip" android:paddingtop= "1dip"6android:paddingbottom= "1dip" >7<imagebutton android:id= "@+id/begin" android:layout_width= "Wrap_content"8android:layout_height= "Wrap_content" android:src= "@drawable/begin"/>9<imagebutton android:id= "@+id/pause" android:layout_width= "Wrap_content"Tenandroid:layout_height= "Wrap_content" android:src= "@drawable/pause"/> One<imagebutton android:id= "@+id/stop" android:layout_width= "Wrap_content" Aandroid:layout_height= "Wrap_content" android:src= "@drawable/stop"/> -</LinearLayout>

(2) Androidmanifest.xml Registered Activity

1 <activity android:name= ". Playeractivity "android:label=" @string/app_name "/>

2.java
(1) Localmp3listactivity.java

When you click on a song, start playeractivity

1 @Override2     protected voidOnlistitemclick (ListView L, View V,intPositionLongID) {3Mp3info info =Infos.get (position);4Intent Intent =NewIntent ();5Intent.putextra ("Mp3info", info);6Intent.setclass ( This, Playeractivity.class);7 startactivity (intent);8}

(2) Playeractivity.java

1  PackageTony.mp3player;2 3 ImportJava.io.File;4 5 ImportTony.model.Mp3Info;6 Importandroid.app.Activity;7 Importandroid.content.Intent;8 ImportAndroid.media.MediaPlayer;9 ImportAndroid.net.Uri;Ten ImportAndroid.os.Bundle; One Importandroid.os.Environment; A ImportAndroid.view.View; - ImportAndroid.view.View.OnClickListener; - ImportAndroid.widget.ImageButton; the  -  Public classPlayeractivityextendsActivity { -  -     PrivateImageButton beginbtn =NULL; +     PrivateImageButton pausebtn =NULL; -     PrivateImageButton stopbtn =NULL; +      A     PrivateMediaPlayer MediaPlayer =NULL; at     PrivateMp3info info =NULL; -      -     Private BooleanIsPlaying =false; -     Private BooleanIspause =false; -     Private BooleanIsrelease =false; -      in @Override -     protected voidonCreate (Bundle savedinstancestate) { to         Super. OnCreate (savedinstancestate); + Setcontentview (r.layout.player); -Intent Intent =getintent (); theinfo = (mp3info) Intent.getserializableextra ("Mp3info"); *BEGINBTN =(ImageButton) Findviewbyid (r.id.begin); $PAUSEBTN =(ImageButton) Findviewbyid (r.id.pause);Panax NotoginsengSTOPBTN =(ImageButton) Findviewbyid (r.id.stop); -          theBeginbtn.setonclicklistener (NewBeginlistener ()); +Pausebtn.setonclicklistener (NewPauselistener ()); AStopbtn.setonclicklistener (NewStoplistener ()); the     } +      -     classBeginlistenerImplementsOnclicklistener { $ @Override $          Public voidOnClick (View v) { -             if(!isplaying) { -String Path =Getmp3path (Info.getmp3name ()); theMediaPlayer = Mediaplayer.create (playeractivity. This, Uri.parse ("file://" +path)); - Mediaplayer.start ();WuyiIsPlaying =true; theIsrelease =false; -             } Wu         } -     } About      $     classPauselistenerImplementsOnclicklistener { - @Override -          Public voidOnClick (View v) { -             if(MediaPlayer! =NULL) { A                 if(!isrelease) { +                     if(!ispause) { the mediaplayer.pause (); -Ispause =true; $}Else { the Mediaplayer.start (); theIspause =false; the                     } the                 } -             } in         } the     } the      About     classStoplistenerImplementsOnclicklistener { the @Override the          Public voidOnClick (View v) { the             if(MediaPlayer! =NULL) { +                 if(isplaying) { -                     if(!isrelease) { the mediaplayer.stop ();Bayi mediaplayer.release (); theIsrelease =true; theIsPlaying =false; -                     } -                 } the             } the         } the     } the      -     Privatestring Getmp3path (String mp3name) { theString Sdcartroot =environment.getexternalstoragedirectory (). GetAbsolutePath (); theString Path = sdcartroot + File.separator + "MP3" + File.separator +Mp3name; the         returnpath;94     } the}

Android_mars Learning Note _s01 original version _023_mp3player003_ play mp3