About [Android] multimedia playback API

interface layout, horizontal direction four buttons evenly distributed, use weight, define android:layout_width="0DP", define layout_weight="1" This attribute is all consistent is evenly distributed

Gets the file object, using the new file () to implement the

Determines whether a file exists , the exists () method of The Files object , the length () must be greater than 0

Get MediaPlayer object, come out with new

Start playback

Call the Setaudiostreamtype () method of the MediaPlayer Object , set the audio stream type, parameters:audiomanager.stream_ MUSIC

Call the Setdatasource () method of the MediaPlayer Object , set the data source, parameter:String File path, or it can be an http

Call the prepare () method of the MediaPlayer object to prepare

Call the start () method of the MediaPlayer object to play

Call the play button's setenable () method, set the button as not clickable, parameter:false

When you have finished playing, you should set the button to click

Call the Setoncompletionlistener () method of the MediaPlayer Object , set the completion listener, parameters: The Oncompletionlistener interface, using an anonymous inner class implementation interface, overrides the method oncompletion () method, in this method calls the play button's Setenable (True)

Stop playing

Determines that the MediaPlayer object is not empty and that the MediaPlayer object isplaying () is True

Call the Stop () method of the MediaPlayer object to stop playback

Call the release () method of the MediaPlayer object , whether

Set the MediaPlayer object to null

Re-play

Determines that the MediaPlayer object is not empty and that the MediaPlayer object isplaying () is True

Call the MediaPlayer object seekto () method, set the playback progress, parameters:0 can

If it does not exist, then call the play function above directly

Pause Playback

Determines that the MediaPlayer object is not empty and that the MediaPlayer object isplaying () is true

Call the pause () method of the MediaPlayer object to pause playback

Call the SetText () method of the pause button to set the text to: Continue

In this click event to determine whether the text is "continue", if it is, continue to play

Call the start () method of the MediaPlayer Object

Call pause Anne's setText () method, set Text to: Pause

Mainactivity.java

 PackageCom.tsh.tshplayer;ImportJava.io.File;Importjava.io.IOException;Importandroid.app.Activity;ImportAndroid.content.SharedPreferences.Editor;ImportAndroid.media.AudioManager;ImportAndroid.media.MediaPlayer;ImportAndroid.media.MediaPlayer.OnCompletionListener;ImportAndroid.os.Bundle;ImportAndroid.view.Menu;ImportAndroid.view.MenuItem;ImportAndroid.view.View;ImportAndroid.view.View.OnClickListener;ImportAndroid.widget.Button;ImportAndroid.widget.EditText;ImportAndroid.widget.Toast; Public classMainactivityextendsActivityImplementsOnclicklistener {PrivateEditText Et_music; PrivateButton Bt_play, Bt_pause, Bt_stop, Bt_replay; PrivateMediaPlayer player; @Overrideprotected voidonCreate (Bundle savedinstancestate) {Super. OnCreate (savedinstancestate);        Setcontentview (R.layout.activity_main); Et_music=(EditText) Findviewbyid (r.id.et_music); Bt_play=(Button) Findviewbyid (R.id.bt_play); Bt_pause=(Button) Findviewbyid (r.id.bt_pause); Bt_stop=(Button) Findviewbyid (r.id.bt_stop); Bt_replay=(Button) Findviewbyid (R.id.bt_replay); Bt_play.setonclicklistener ( This); Bt_pause.setonclicklistener ( This); Bt_stop.setonclicklistener ( This); Bt_replay.setonclicklistener ( This); }    //Click events@Override Public voidOnClick (View v) {Switch(V.getid ()) {//Play         CaseR.id.bt_play:play ();  Break; //Pause         CaseR.id.bt_pause:pause ();  Break; //Replay         CaseR.id.bt_replay:replay ();  Break; //Stop         CaseR.id.bt_stop:stop ();  Break; }    }    //Stop playing    Private voidStop () {if(player!=NULL&&player.isplaying ())            {player.stop (); Bt_play.setenabled (true); }    }    //Replay Music    Private voidReplay () {if(player!=NULL&&player.isplaying ()) {Player.seekto (0); }    }    //Pause Music    Private voidpause () {if(player!=NULL&&player.isplaying ())            {Player.pause (); Bt_pause.settext (Continue to); }Else if(Bt_pause.gettext (). toString (). Trim (). Equals ("Continue") ) {Player.start (); Bt_pause.settext (Pause); }    }    //Play Music    Private voidPlay () {String music=Et_music.gettext (). toString (). Trim (); File File=NewFile (music); if(File.exists () && file.length () > 0) {            Try{player=NewMediaPlayer ();                Player.setaudiostreamtype (Audiomanager.stream_music);                Player.setdatasource (music);                Player.prepare ();                Player.start (); //Set ButtonBt_play.setenabled (false); //Music Completion CallbackPlayer.setoncompletionlistener (NewOncompletionlistener () {@Override Public voidOncompletion (MediaPlayer MP) {bt_play.setenabled (true);            }                }); } Catch(Exception e) {e.printstacktrace (); Toast.maketext ( This, "Play Music Failed", 0). Show (); }        } Else{Toast.maketext ( This, "Music file does not exist", 0). Show (); }    }}

<LinearLayoutxmlns: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:orientation= "vertical"Tools:context= "${relativepackage}.${activityclass}" >    <EditTextAndroid:id= "@+id/et_music"Android:layout_width= "Match_parent"Android:layout_height= "Wrap_content"Android:hint= "Music Path" />    <LinearLayoutAndroid:layout_width= "Match_parent"Android:layout_height= "Wrap_content"android:orientation= "Horizontal">        <ButtonAndroid:layout_weight= "1"Android:layout_width= "0DP"Android:layout_height= "Wrap_content"Android:text= "Play"Android:id= "@+id/bt_play"/>        <ButtonAndroid:layout_weight= "1"Android:layout_width= "0DP"Android:layout_height= "Wrap_content"Android:text= "Paused"Android:id= "@+id/bt_pause"/>        <ButtonAndroid:layout_weight= "1"Android:layout_width= "0DP"Android:layout_height= "Wrap_content"Android:text= "Replay"Android:id= "@+id/bt_replay"/>        <ButtonAndroid:layout_weight= "1"Android:layout_width= "0DP"Android:layout_height= "Wrap_content"Android:text= "Stop"Android:id= "@+id/bt_stop"/>    </LinearLayout></LinearLayout>

[Android] multimedia playback API Introduction