這篇文章主要介紹了Android中如何開發(fā)簡(jiǎn)易音樂(lè)播放器,具有一定借鑒價(jià)值,感興趣的朋友可以參考下,希望大家閱讀完這篇文章之后大有收獲,下面讓小編帶著大家一起了解一下。
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代碼:
activity—main。xml:
main。activity部分:
package com.example.cungu.musicdemo;import android.animation.ObjectAnimator;import android.animation.ValueAnimator;import android.content.ComponentName;import android.content.Intent;import android.content.ServiceConnection;import android.graphics.Bitmap;import android.graphics.Color;import android.os.Build;import android.os.IBinder;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.view.Window;import android.view.WindowManager;import android.view.animation.LinearInterpolator;import android.widget.Button;import android.widget.ImageView;import android.widget.SeekBar;import android.widget.TextSwitcher;import java.text.SimpleDateFormat;import java.util.Date;public class MainActivity extends AppCompatActivity implements View.OnClickListener, Runnable, ServiceConnection, SeekBar.OnSeekBarChangeListener { private ImageView disc,needle,playingPre,playingPlay,playingNext; private ObjectAnimator discAnimation,needleAnimation;//自定義指針和唱盤 private boolean isPlaying = true;//0,1 判斷是否處于播放狀態(tài) //聲明服務(wù) private static final String TAG = MainActivity.class.getSimpleName(); private MediaService.MusicController mMusicController; //使用方法:mMusicController.play();播放 mMusicController.pause();暫停 private boolean running; private TextSwitcher mSwitcher; private SeekBar mSeekBar; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //設(shè)置透明欄 if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { Window window = getWindow(); window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS | WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION); window.getDecorView().setSystemUiVisibility( View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_STABLE ); window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS); window.setStatusBarColor(Color.TRANSPARENT); } //滑動(dòng)條部分 mSeekBar = (SeekBar) findViewById(R.id.music_seek_bar); mSeekBar.setOnSeekBarChangeListener(this); mSwitcher = (TextSwitcher) findViewById(R.id.text_switcher); mSwitcher.setInAnimation(this, android.R.anim.fade_in); mSwitcher.setOutAnimation(this, android.R.anim.fade_out); Intent intent = new Intent(this, MediaService.class); //增加StartService,來(lái)增加后臺(tái)播放功能 startService(intent); // 綁定服務(wù),使用context來(lái)綁定 // 那個(gè)界面需要綁定 就用哪個(gè) Activity // 參數(shù)1:Intent 代表需要綁定哪一個(gè)Service // 參數(shù)2:ServiceConnection 回調(diào)接口,可以接收到Service連接成功和斷開的回調(diào),成功就可以取到對(duì)象。 // 綁定服務(wù) 參數(shù)2就是服務(wù)和指定的對(duì)象綁定在一起 bindService(intent, this, BIND_AUTO_CREATE); //指針和唱片部分 initViews();//定義背景圖 setAnimations(); } private void initViews() { playingPre = (ImageView) findViewById(R.id.playing_pre); playingPlay = (ImageView) findViewById(R.id.playing_play); playingNext = (ImageView) findViewById(R.id.playing_next); disc = (ImageView) findViewById(R.id.disc); needle = (ImageView) findViewById(R.id.needle); playingPre.setOnClickListener(this); playingPlay.setOnClickListener(this); playingNext.setOnClickListener(this); } //動(dòng)畫設(shè)置 private void setAnimations() { discAnimation = ObjectAnimator.ofFloat(disc, "rotation", 0, 360); discAnimation.setDuration(20000); discAnimation.setInterpolator(new LinearInterpolator()); discAnimation.setRepeatCount(ValueAnimator.INFINITE); needleAnimation = ObjectAnimator.ofFloat(needle, "rotation", 0, 25); needle.setPivotX(0); needle.setPivotY(0); needleAnimation.setDuration(800); needleAnimation.setInterpolator(new LinearInterpolator()); } @Override public void onClick(View v) { int id = v.getId(); switch (id) { case R.id.playing_pre://前一曲 if (discAnimation != null) { discAnimation.end(); playing(); } break; case R.id.playing_play://播放中 if (isPlaying){ playing(); }else { if (needleAnimation != null) { needleAnimation.reverse(); needleAnimation.end(); mMusicController.pause(); } if (discAnimation != null && discAnimation.isRunning()) { discAnimation.cancel(); mMusicController.pause(); float valueAvatar = (float) discAnimation.getAnimatedValue(); discAnimation.setFloatValues(valueAvatar, 360f + valueAvatar); } playingPlay.setImageResource(R.drawable.music_play); isPlaying = true; } break; case R.id.playing_next://下一曲 if (discAnimation != null) { discAnimation.end(); playing(); } break; default: break; } } //播放:1、播放音樂(lè) 2、動(dòng)畫旋轉(zhuǎn) 3、暫停圖片切換為播放按鈕圖片 private void playing(){ needleAnimation.start(); discAnimation.start(); playingPlay.setImageResource(R.drawable.music_pause); mMusicController.play();//播放 isPlaying = false; }//===================================播放歌曲服務(wù)開啟、停止、結(jié)束=============================== @Override protected void onStart() { super.onStart(); Thread thread = new Thread(this); thread.start(); } @Override protected void onStop() { running = false; super.onStop(); } @Override protected void onDestroy() { // 解除綁定 unbindService(this); super.onDestroy(); } //---------------------播放到當(dāng)前音樂(lè)的滑動(dòng)條及時(shí)間設(shè)置-------------------------- @Override public void run() { running = true; try { while (running) { if (mMusicController != null) { long musicDuration = mMusicController.getMusicDuration(); final long position = mMusicController.getPosition(); final Date dateTotal = new Date(musicDuration); final SimpleDateFormat sb = new SimpleDateFormat("mm:ss"); mSeekBar.setMax((int) musicDuration); mSeekBar.setProgress((int) position); mSwitcher.post( new Runnable() { @Override public void run() { Date date = new Date(position); String time = sb.format(date) + "/" + sb.format(dateTotal); mSwitcher.setCurrentText(time); } } ); } Thread.sleep(500); } } catch (InterruptedException e) { e.printStackTrace(); } } //----------------------------- //服務(wù)綁定與解除綁定的回調(diào) /** * 當(dāng)服務(wù)與當(dāng)前綁定對(duì)象,綁定成功,服務(wù)onBind方法調(diào)用并且返回之后 * 回調(diào)給這個(gè)方法 * * @param name * @param service IBinder 就是服務(wù) onBind 返回的對(duì)象 */ @Override public void onServiceConnected(ComponentName name, IBinder service) { mMusicController = ((MediaService.MusicController) service); } @Override public void onServiceDisconnected(ComponentName name) { mMusicController = null; } public void btnStopService(View view) { Intent intent = new Intent(this, MediaService.class); stopService(intent); } @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { } @Override public void onStartTrackingTouch(SeekBar seekBar) { } @Override public void onStopTrackingTouch(SeekBar seekBar) { mMusicController.setPosition(seekBar.getProgress()); }}
mediaserver部分的代碼:
package com.example.cungu.musicdemo;import android.app.Service;import android.content.Intent;import android.media.MediaPlayer;import android.os.Binder;import android.os.Environment;import android.os.IBinder;public class MediaService extends Service { private MediaPlayer mPlayer; /* 綁定服務(wù)的實(shí)現(xiàn)流程: * 1.服務(wù) onCreate, onBind, onDestroy 方法 * 2.onBind 方法需要返回一個(gè) IBinder 對(duì)象 * 3.如果 Activity 綁定,Activity 就可以取到 IBinder 對(duì)象,可以直接調(diào)用對(duì)象的方法 */ // 相同應(yīng)用內(nèi)部不同組件綁定,可以使用內(nèi)部類以及Binder對(duì)象來(lái)返回。 public class MusicController extends Binder { public void play() { mPlayer.start();//開啟音樂(lè) } public void pause() { mPlayer.pause();//暫停音樂(lè) } public long getMusicDuration() { return mPlayer.getDuration();//獲取文件的總長(zhǎng)度 } public long getPosition() { return mPlayer.getCurrentPosition();//獲取當(dāng)前播放進(jìn)度 } public void setPosition (int position) { mPlayer.seekTo(position);//重新設(shè)定播放進(jìn)度 } } /** * 當(dāng)綁定服務(wù)的時(shí)候,自動(dòng)回調(diào)這個(gè)方法 * 返回的對(duì)象可以直接操作Service內(nèi)部的內(nèi)容 * @param intent * @return */ @Override public IBinder onBind(Intent intent) { return new MusicController(); } @Override public void onCreate() { super.onCreate(); mPlayer = MediaPlayer.create(this, R.raw.yinyue1); } /** * 任意一次unbindService()方法,都會(huì)觸發(fā)這個(gè)方法 * 用于釋放一些綁定時(shí)使用的資源 * @param intent * @return */ @Override public boolean onUnbind(Intent intent) { return super.onUnbind(intent); } @Override public void onDestroy() { if (mPlayer.isPlaying()) { mPlayer.stop(); } mPlayer.release(); mPlayer = null; super.onDestroy(); }}
到此,這一個(gè)簡(jiǎn)易的音樂(lè)播放器,就完成了。
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