本文實(shí)例為大家分享了Android實(shí)現(xiàn)簡(jiǎn)易的音樂(lè)播放器，供大家參考，具體內(nèi)容如下

本次實(shí)驗(yàn)實(shí)現(xiàn)的是使用Andriod Studio開發(fā)一個(gè)簡(jiǎn)易的音樂(lè)播放器，所包含的功能有音樂(lè)的播放、暫停、上一曲、下一曲、音樂(lè)播放的進(jìn)度以及手動(dòng)拖動(dòng)來(lái)控制音樂(lè)的播放進(jìn)度。

導(dǎo)入項(xiàng)目所需的音樂(lè)文件、圖標(biāo)、背景等

1.創(chuàng)建一個(gè)raw文件夾，將音樂(lè)文件導(dǎo)入到這個(gè)文件夾中，方便我們?cè)陧?xiàng)目中使用

2.在drawable中導(dǎo)入所需的圖片、圖標(biāo)

設(shè)計(jì)UI界面

1.設(shè)計(jì)5個(gè)button控件，分別對(duì)應(yīng)上一曲，下一曲，暫停，播放，退出

2.設(shè)計(jì)3個(gè)TextView,分別對(duì)應(yīng)歌曲的介紹信息、歌曲的進(jìn)度（歌曲的總時(shí)間和歌曲當(dāng)前播放的時(shí)間）、歌曲的名字

service服務(wù)的編寫創(chuàng)建一個(gè)MusicService對(duì)象繼承Service

MusicService所需要的成員變量

MyReceiver serviceReceiver;Thread processThread;AssetManager am;//是附件管理器，用于根據(jù)文件名找到文件所在并打開文件String[] musics = new String[]{'legendsneverdie.mp3', 'promise.mp3','beautiful.mp3'};//默認(rèn)顯示的歌曲信息MediaPlayer mPlayer;// 當(dāng)前的狀態(tài)，0x11代表沒(méi)有播放；0x12代表正在播放；0x13代表暫停int status = 0x11;// 記錄當(dāng)前正在播放的音樂(lè)int current = 0;

實(shí)現(xiàn)循環(huán)播放

public void onCreate() {super.onCreate();am = getAssets();// 創(chuàng)建BroadcastReceiverserviceReceiver = new MyReceiver();// 創(chuàng)建IntentFilterIntentFilter filter = new IntentFilter();filter.addAction(MainActivity.CTL_ACTION);registerReceiver(serviceReceiver, filter);// 創(chuàng)建MediaPlayermPlayer = new MediaPlayer();// 為MediaPlayer播放完成事件綁定監(jiān)聽器mPlayer.setOnCompletionListener(new OnCompletionListener(){ @Override public void onCompletion(MediaPlayer mp) {Log.d('musicService', '播放完成');current++;if (current >= 3) { current = 0;}// 準(zhǔn)備并播放音樂(lè)prepareAndPlay(musics[current]);//發(fā)送廣播通知Activity更改文本框Intent sendIntent = new Intent(MainActivity.UPDATE_ACTION);sendIntent.putExtra('current', current);sendIntent.putExtra('currentTime', mPlayer.getCurrentPosition());sendIntent.putExtra('totalTime', mPlayer.getDuration());// 發(fā)送廣播，將被Activity組件中的BroadcastReceiver接收到sendBroadcast(sendIntent); }}); private void prepareAndPlay(String music) {try { // 打開指定音樂(lè)文件 AssetFileDescriptor afd = am.openFd(music); mPlayer.reset(); // 使用MediaPlayer加載指定的聲音文件。 mPlayer.setDataSource(afd.getFileDescriptor(), afd.getStartOffset(), afd.getLength()); // 準(zhǔn)備聲音 mPlayer.prepare(); // 播放 mPlayer.start();} catch (IOException e) { e.printStackTrace();} }

實(shí)現(xiàn)刷新進(jìn)度條

processThread = new Thread(new Runnable() {@Overridepublic void run() { while (true) {if (status == 0x12) { try {Thread.sleep(1000);Intent sendIntent = new Intent(MainActivity.UPDATE_ACTION);sendIntent.putExtra('current', current);sendIntent.putExtra('currentTime', mPlayer.getCurrentPosition());sendIntent.putExtra('totalTime', mPlayer.getDuration());// 發(fā)送廣播，將被Activity組件中的BroadcastReceiver接收到sendBroadcast(sendIntent); } catch (InterruptedException e) {e.printStackTrace(); }} }} }); processThread.start();}

廣播通信接收器的實(shí)現(xiàn)（用于實(shí)現(xiàn)和activity的通信）

public class MyReceiver extends BroadcastReceiver { @Override public void onReceive(final Context context, Intent intent) {int control = intent.getIntExtra('control', -1);Log.d('musicReceiver', '收到廣播, control=' + control);switch (control) { // 播放或暫停 case 1:// 原來(lái)處于沒(méi)有播放狀態(tài)if (status == 0x11) { // 準(zhǔn)備并播放音樂(lè) prepareAndPlay(musics[current]); status = 0x12;}// 原來(lái)處于播放狀態(tài)else if (status == 0x12) { // 暫停 mPlayer.pause(); // 改變?yōu)闀和顟B(tài) status = 0x13;}// 原來(lái)處于暫停狀態(tài)else if (status == 0x13) { // 播放 mPlayer.start(); // 改變狀態(tài) status = 0x12;}break;// 下一首 case 2:if (status == 0x12 || status == 0x13) { mPlayer.stop(); if (current + 1 >= musics.length) {current = 0; } else {current++; } prepareAndPlay(musics[current]); status = 0x12; break;}// 上一首 case 3:if (status == 0x12 || status == 0x13) { mPlayer.stop(); if (current - 1 < 0) {current = musics.length - 1; } else {current--; } prepareAndPlay(musics[current]); status = 0x12;}}// 廣播通知Activity更改圖標(biāo)、文本框Intent sendIntent = new Intent(MainActivity.UPDATE_ACTION);sendIntent.putExtra('update', status);sendIntent.putExtra('current', current);// 發(fā)送廣播，將被Activity組件中的BroadcastReceiver接收到sendBroadcast(sendIntent); }}

activity的實(shí)現(xiàn)

初始化和動(dòng)態(tài)綁定接收器

// 獲取界面中顯示歌曲標(biāo)題、作者文本框TextView title, author, currentTime, totalTime;// 播放/暫停、停止按鈕ImageButton play;ImageView lastMusic, nextMusic;// 進(jìn)度條ProgressBar progressBar;ActivityReceiver activityReceiver;public static final String CTL_ACTION ='org.xr.action.CTL_ACTION';public static final String UPDATE_ACTION ='org.xr.action.UPDATE_ACTION';// 定義音樂(lè)的播放狀態(tài)，0x11代表沒(méi)有播放；0x12代表正在播放；0x13代表暫停int status = 0x11;String[] titleStrs = new String[]{'Legends Never Die', '約定', '美麗新世界'};String[] authorStrs = new String[]{'英雄聯(lián)盟', '周蕙', '伍佰'};@Overridepublic void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // 獲取程序界面界面中的兩個(gè)按鈕 play = (ImageButton) this.findViewById(R.id.play); lastMusic = this.findViewById(R.id.lastMusic); nextMusic = this.findViewById(R.id.nextMusic); title = (TextView) findViewById(R.id.title); author = (TextView) findViewById(R.id.author); currentTime = findViewById(R.id.currentTime); totalTime = findViewById(R.id.totalTime); progressBar = findViewById(R.id.progressBar); // 為兩個(gè)按鈕的單擊事件添加監(jiān)聽器 play.setOnClickListener(this); lastMusic.setOnClickListener(this); nextMusic.setOnClickListener(this); activityReceiver = new ActivityReceiver(); // 創(chuàng)建IntentFilter IntentFilter filter = new IntentFilter(); // 指定BroadcastReceiver監(jiān)聽的Action filter.addAction(UPDATE_ACTION); // 注冊(cè)BroadcastReceiver registerReceiver(activityReceiver, filter); Intent intent = new Intent(this, MusicService.class); // 啟動(dòng)后臺(tái)Service startService(intent);}

設(shè)置activity的廣播接收器（接收service發(fā)送過(guò)來(lái)的廣播）

public void onReceive(Context context, Intent intent) { // 獲取Intent中的update消息，update代表播放狀態(tài) int update = intent.getIntExtra('update', -1); // 獲取Intent中的current消息，current代表當(dāng)前正在播放的歌曲 int current = intent.getIntExtra('current', -1); int totalPosition = intent.getIntExtra('totalTime', -1); int currentPosition = intent.getIntExtra('currentTime', -1); Log.d('activityReceiver', '收到廣播'); Log.d('activityReceiver', 'current:' + current + ' totalPosition:' + totalPosition + ' currentPosition:' + currentPosition + ' update:' + update); if (current >= 0) {title.setText(titleStrs[current]);author.setText(authorStrs[current]); } if (totalPosition >= 0) {SimpleDateFormat simpleDateFormat = new SimpleDateFormat('mm:ss', Locale.CHINA);Date date = new Date(totalPosition);String formatTime = simpleDateFormat.format(date);totalTime.setText(formatTime); } if (currentPosition >= 0) {double process = ((double)currentPosition / totalPosition)*100;Log.d('activityReceiver', '當(dāng)前進(jìn)度:' + (double)currentPosition/totalPosition);SimpleDateFormat simpleDateFormat = new SimpleDateFormat('mm:ss', Locale.CHINA);Date date = new Date(currentPosition);String formatTime = simpleDateFormat.format(date);progressBar.setProgress((int) process);currentTime.setText(formatTime); } switch (update) {case 0x11: play.setImageResource(R.drawable.play); status = 0x11; break;// 控制系統(tǒng)進(jìn)入播放狀態(tài)case 0x12: // 播放狀態(tài)下設(shè)置使用暫停圖標(biāo) play.setImageResource(R.drawable.pause); // 設(shè)置當(dāng)前狀態(tài) status = 0x12; break;// 控制系統(tǒng)進(jìn)入暫停狀態(tài)case 0x13: // 暫停狀態(tài)下設(shè)置使用播放圖標(biāo) play.setImageResource(R.drawable.play); // 設(shè)置當(dāng)前狀態(tài) status = 0x13; break; }}

實(shí)現(xiàn)圖標(biāo)的點(diǎn)擊功能

// 創(chuàng)建Intent Intent intent = new Intent('org.xr.action.CTL_ACTION'); switch (source.getId()) {// 按下播放/暫停按鈕case R.id.play: intent.putExtra('control', 1); break;case R.id.lastMusic: intent.putExtra('control', 3);case R.id.nextMusic: intent.putExtra('control', 2); } // 發(fā)送廣播，將被Service組件中的BroadcastReceiver接收到 sendBroadcast(intent);}

結(jié)果展示

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持好吧啦網(wǎng)。