Android multimedia playback API introduction, androidapi

Android multimedia playback API introduction, androidapi

This article calls the android Media Player to play some music.

Project Layout:

<LinearLayout 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: orientation = "vertical" tools: context = ". mainActivity "> <EditText android: id =" @ + id/et_path "android: layout_width =" fill_parent "android: layout_height =" wrap_content "android: hint = "Enter the music file path"/> <LinearLayout android: layout_width = "fill_parent" android: layout_height = "wrap_content" android: orientation = "horizontal"> <Button android: id = "@ + id/bt_play" android: layout_width = "0dip" android: layout_height = "wrap_content" android: layout_weight = "1" android: text = "play"/> <Button android: id = "@ + id/bt_pause" android: layout_width = "0dip" android: layout_height = "wrap_content" android: layout_weight = "1" android: text = "pause"/> <Button android: id = "@ + id/bt_replay" android: layout_width = "0dip" android: layout_height = "wrap_content" android: layout_weight = "1" android: text = "replay"/> <Button android: id = "@ + id/bt_stop" android: layout_width = "0dip" android: layout_height = "wrap_content" android: layout_weight = "1" android: text = "stop"/> </LinearLayout>

You can view files in the local sdk and view related APIs.

File :///...... /Sdk/docs/guide/topics/media/mediaplayer.html

URL: http://www.cnblogs.com/wuyudong/p/5679191.html.

The logic code is as follows:

Package com.wuyudong.mp3 player; import java. io. file; import java. io. IOException; import android. media. audioManager; import android. media. mediaPlayer; import android. media. mediaPlayer. onCompletionListener; import android.net. uri; import android. OS. bundle; import android. app. activity; import android. view. menu; import android. view. view; import android. view. view. onClickListener; import android. widget. button; import Android. widget. editText; import android. widget. toast; public class MainActivity extends Activity implements OnClickListener {private EditText et_path; private Button bt_play, bt_replay, encrypted, bt_stop; private MediaPlayer mediaPlayer; @ Override protected void onCreate (Bundle listener. onCreate (savedInstanceState); setContentView (R. layout. activity_main); et_path = (EditText) fi NdViewById (R. id. et_path); bt_play = (Button) findViewById (R. id. bt_play); bt_replay = (Button) findViewById (R. id. bt_replay); bt_pause = (Button) findViewById (R. id. bt_pause); bt_stop = (Button) findViewById (R. id. bt_stop); listener (this); bt_play.setOnClickListener (this); bt_replay.setOnClickListener (this); bt_stop.setOnClickListener (this);} @ Override public void onClick (View v ){ Switch (v. getId () {case R. id. bt_play: play (); break; case R. id. bt_replay: replay (); break; case R. id. bt_stop: stop (); break; case R. id. bt_pause: pause (); break; default: break;}/*** pause music */private void pause () {if ("continue ". equals (bt_pause.getText (). toString (). trim () {mediaPlayer. start (); bt_pause.setText ("pause"); return;} if (mediaPlayer! = Null & mediaPlayer. isPlaying () {mediaPlayer. pause (); bt_pause.setText ("continue"); return ;}}/*** replay */private void replay () {if (mediaPlayer! = Null & mediaPlayer. isPlaying () {mediaPlayer. seekTo (0); return;} play () ;}/ *** stop playing music */private void stop () {if (mediaPlayer! = Null & mediaPlayer. isPlaying () {mediaPlayer. stop (); mediaPlayer. release (); // remember to release the resource mediaPlayer = null; bt_play.setEnabled (true);}/*** play music */private void play () {String path = et_path.getText (). toString (). trim (); File file = new File (path); if (file. exists () & file. length ()> 0) {try {mediaPlayer = new MediaPlayer (); mediaPlayer. setAudioStreamType (AudioManager. STREAM_MUSIC); mediaP Layer. setDataSource (path); mediaPlayer. prepare (); // might take long! (For buffering, etc) mediaPlayer. start (); mediaPlayer. setOnCompletionListener (new OnCompletionListener () {@ Override public void onCompletion (MediaPlayer mp) {bt_play.setEnabled (true) ;}}); bt_play.setEnabled (false);} catch (Exception e) {Toast. makeText (this, "playback failed", 0 ). show (); e. printStackTrace () ;}} else {Toast. makeText (this, "the file does not exist", 0 ). show ();}}}

Upload an audio file to sdcard before executing the code.

The final result of running the project is as follows: