本文實(shí)例講述了Android編程視頻播放API之MediaPlayer用法。分享給大家供大家參考，具體如下：
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現(xiàn)在項(xiàng)目要做音視頻這塊功能，這正是我相對比較薄弱的地方，項(xiàng)目中要用到，趕緊抓緊時間學(xué)習(xí)。前面有一編介紹不錯的文章https://www.jb51.net/article/121881.htm，值得學(xué)習(xí)。
這里給出一個較為簡單的示例：
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重慶分公司
/**
* Android API MediaPlayer示例
*
* @description：
* @author ldm
* @date 2016-4-20 上午10:42:06
*/
public class MediaPlayerActivity extends Activity implements OnClickListener {
private Button mlocalvideo;
private Button mstreamvideo;
private Button mlocalaudio;
private Button mresourcesaudio;
private static final String MEDIA = "media";
private static final int LOCAL_AUDIO = 1;
private static final int RESOURCES_AUDIO = 3;
private static final int STREAM_VIDEO = 5;
@Override
protected void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.activity_mediaplayer);
initViewsAndEvents();
}
private void initViewsAndEvents() {
mlocalaudio = (Button) findViewById(R.id.localaudio);
mresourcesaudio = (Button) findViewById(R.id.resourcesaudio);
mlocalvideo = (Button) findViewById(R.id.localvideo);
mstreamvideo = (Button) findViewById(R.id.streamvideo);
mlocalaudio.setOnClickListener(this);
mresourcesaudio.setOnClickListener(this);
mlocalvideo.setOnClickListener(this);
mstreamvideo.setOnClickListener(this);
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.localaudio:
case R.id.localvideo:
Intent intent = new Intent(MediaPlayerActivity.this.getApplication(),
MediaPlayerDemo_Audio.class);
intent.putExtra(MEDIA, LOCAL_AUDIO);
startActivity(intent);
break;
case R.id.resourcesaudio:
Intent resIn = new Intent(MediaPlayerActivity.this.getApplication(),
MediaPlayerDemo_Audio.class);
resIn.putExtra(MEDIA, RESOURCES_AUDIO);
startActivity(resIn);
break;
case R.id.streamvideo:
Intent streamIn = new Intent(MediaPlayerActivity.this,
MediaPlayerDemo_Video.class);
streamIn.putExtra(MEDIA, STREAM_VIDEO);
startActivity(streamIn);
break;
}
}
}
/**
* OnBufferingUpdateListener可以獲取視頻音頻流的緩沖狀態(tài);
* OnCompletionListener播放完畢監(jiān)聽器
* OnPreparedListener準(zhǔn)備播放相關(guān)接口
* OnVideoSizeChangedListener注冊視頻大小改變監(jiān)聽器
* SurfaceHolder.Callback：SurfaceView監(jiān)聽callback
* @description：
* @author ldm
* @date 2016-4-20 上午9:46:16
*/
public class MediaPlayer_Video extends Activity implements
OnBufferingUpdateListener, OnCompletionListener,
OnPreparedListener, OnVideoSizeChangedListener, SurfaceHolder.Callback {
private static final String TAG = "MediaPlayerDemo";
//Video寬度
private int mVideoWidth;
//Video高度
private int mVideoHeight;
//播放器MediaPlayer
private MediaPlayer mMediaPlayer;
//播放界面SurfaceView
private SurfaceView mPreview;
//媒體播放器的載體 SurfaceHolder
private SurfaceHolder holder;
//文件路徑
private String path;
//Bundle數(shù)據(jù)對象
private Bundle extras;
private static final String MEDIA = "media";
private static final int LOCAL_VIDEO = 1;
private static final int RESOURCES_AUDIO = 3;
private static final int STREAM_VIDEO = 5;
private boolean mIsVideoSizeKnown = false;
private boolean mIsVideoReadyToBePlayed = false;
@SuppressWarnings("deprecation")
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.mediaplayer_2);
mPreview = (SurfaceView) findViewById(R.id.surface);
holder = mPreview.getHolder();
holder.addCallback(this);
//高版本上已經(jīng)不推薦使用了 ，如果要兼容低版本（如Android 2.3或以下版本）要加上這段代碼，不然播放時 只會有聲音 沒有圖像。
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
extras = getIntent().getExtras();
}
private void playVideo(Integer Media) {
doCleanUp();
try {
switch (Media) {
case LOCAL_VIDEO://本地文件（如SD卡）
/*
* TODO:將路徑變量設(shè)置為本地媒體文件路徑。
*/
path = "";//這里要填寫你所播放音視頻的文件路徑
if (path == "") {
Toast
.makeText(
MediaPlayer_Video.this,
"Please edit MediaPlayerDemo_Video Activity, "
+ "and set the path variable to your media file path."
+ " Your media file must be stored on sdcard.",
Toast.LENGTH_LONG).show();
}
break;
case STREAM_VIDEO://流文件
/**
* 路徑變量設(shè)置為mp4或3gpp格式的URL。應(yīng)該使用Http協(xié)議。
* 媒體播放器只能通過流的形式獲取數(shù)據(jù)，所以需要:
* 1。必須是媒體流數(shù)據(jù)。
* 2。必須合理剪輯。
*/
path = "";
if (path == "") {
// Tell the user to provide a media file URL.
Toast
.makeText(
MediaPlayer_Video.this,
"Please edit MediaPlayerDemo_Video Activity,"
+ " and set the path variable to your media file URL.",
Toast.LENGTH_LONG).show();
}
break;
case RESOURCES_AUDIO:
//播放放在諸如res/raw文件夾下的資源文件
//直接通過mMediaPlayer = MediaPlayer.create(this, R.raw.test_cbr);
//可以參考API Demos中AudioFxDemo類文件
break;
}
// 創(chuàng)建MediaPlayer對象，傳入文件數(shù)據(jù)并設(shè)備監(jiān)聽
mMediaPlayer = new MediaPlayer();
mMediaPlayer.setDataSource(path);
mMediaPlayer.setDisplay(holder);
//使用 create() 方法創(chuàng)建的 MediaPlayer, 直接指定了 媒體資源, 不需要再進(jìn)行 調(diào)用 prepare() 方法;
mMediaPlayer.prepare();
mMediaPlayer.setOnBufferingUpdateListener(this);
mMediaPlayer.setOnCompletionListener(this);
mMediaPlayer.setOnPreparedListener(this);
mMediaPlayer.setOnVideoSizeChangedListener(this);
//指定音頻流類型
mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
} catch (Exception e) {
Log.e(TAG, "error: " + e.getMessage(), e);
}
}
public void onBufferingUpdate(MediaPlayer arg0, int percent) {
Log.d(TAG, "onBufferingUpdate percent:" + percent);
}
public void onCompletion(MediaPlayer arg0) {
Log.d(TAG, "onCompletion called");
}
public void onVideoSizeChanged(MediaPlayer mp, int width, int height) {
Log.v(TAG, "onVideoSizeChanged called");
if (width == 0 || height == 0) {
Log.e(TAG, "invalid video width(" + width + ") or height(" + height + ")");
return;
}
mIsVideoSizeKnown = true;
mVideoWidth = width;
mVideoHeight = height;
if (mIsVideoReadyToBePlayed && mIsVideoSizeKnown) {
startVideoPlayback();
}
}
public void onPrepared(MediaPlayer mediaplayer) {
Log.d(TAG, "onPrepared called");
mIsVideoReadyToBePlayed = true;
if (mIsVideoReadyToBePlayed && mIsVideoSizeKnown) {
startVideoPlayback();
}
}
public void surfaceChanged(SurfaceHolder surfaceholder, int i, int j, int k) {
Log.d(TAG, "surfaceChanged called");
}
public void surfaceDestroyed(SurfaceHolder surfaceholder) {
Log.d(TAG, "surfaceDestroyed called");
}
public void surfaceCreated(SurfaceHolder holder) {
Log.d(TAG, "surfaceCreated called");
playVideo(extras.getInt(MEDIA));
}
@Override
protected void onPause() {
super.onPause();
releaseMediaPlayer();
doCleanUp();
}
@Override
protected void onDestroy() {
super.onDestroy();
releaseMediaPlayer();
doCleanUp();
}
private void releaseMediaPlayer() {
if (mMediaPlayer != null) {
mMediaPlayer.release();
mMediaPlayer = null;
}
}
private void doCleanUp() {
mVideoWidth = 0;
mVideoHeight = 0;
mIsVideoReadyToBePlayed = false;
mIsVideoSizeKnown = false;
}
private void startVideoPlayback() {
Log.v(TAG, "startVideoPlayback");
holder.setFixedSize(mVideoWidth, mVideoHeight);
mMediaPlayer.start();
}
}
布局文件activity_mediaplayer
<?xml version="1.0" encoding="utf-8"?>
布局文件activity_mediaplayer_video
<?xml version="1.0" encoding="utf-8"?>
更多關(guān)于Android相關(guān)內(nèi)容感興趣的讀者可查看本站專題：《Android多媒體操作技巧匯總(音頻,視頻,錄音等)》、《Android開發(fā)入門與進(jìn)階教程》、《Android視圖View技巧總結(jié)》、《Android編程之a(chǎn)ctivity操作技巧總結(jié)》、《Android數(shù)據(jù)庫操作技巧總結(jié)》、《Android文件操作技巧匯總》、《Android資源操作技巧匯總》及《Android控件用法總結(jié)》
希望本文所述對大家Android程序設(shè)計(jì)有所幫助。
