在 Samsung Galaxy Note 4 上的 Android Lollipop（几周前刚刚从 4.4.4 更新）上，prepareAsync() 几乎需要 20 秒来加载实时流。在 4.4.4 上，只需要 2-3 秒，并且没有错误（见下文）。这似乎只是直播的问题。预先录制的 mp3 没问题。
这是一个测试：
String url = "http://vprclassical.streamguys.net:80/vprclassical128.mp3"
MediaPlayer mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setOnPreparedListener(
new MediaPlayer.OnPreparedListener() {
@Override
public void onPrepared(MediaPlayer mediaPlayer) {
mediaPlayer.start();
}
});
try {
mediaPlayer.setDataSource(getApplicationContext(),
Uri.parse(url));
mediaPlayer.prepareAsync();
} catch (IOException e) {
e.printStackTrace();
}
}
这是日志猫：
05-13 00:47:09.148 26922-26922/? I/MediaPlayer﹕ Need to enable context aware info
05-13 00:47:09.148 26922-26922/? V/MediaPlayer-JNI﹕ native_setup
05-13 00:47:09.148 26922-26922/? V/MediaPlayer﹕ constructor
05-13 00:47:09.148 26922-26922/? V/MediaPlayer﹕ setListener
05-13 00:47:09.148 26922-26922/? E/MediaPlayer-JNI﹕ QCMediaPlayer mediaplayer NOT present
05-13 00:47:09.148 26922-26922/? V/MediaPlayer-JNI﹕ setAudioStreamType: 3
05-13 00:47:09.148 26922-26922/? V/MediaPlayer﹕ MediaPlayer::setAudioStreamType
05-13 00:47:09.158 26922-26922/? D/MediaPlayer﹕ setDataSource IOException happend :
java.io.FileNotFoundException: No content provider: http://vprclassical.streamguys.net:80/vprclassical128.mp3
at android.content.ContentResolver.openTypedAssetFileDescriptor(ContentResolver.java:1074)
at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:927)
at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:854)
at android.media.MediaPlayer.setDataSource(MediaPlayer.java:1100)
at android.media.MediaPlayer.setDataSource(MediaPlayer.java:1063)
at daford.com.testprepareasync.MainActivity.onCreate(MainActivity.java:42)
at android.app.Activity.performCreate(Activity.java:6295)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2777)
at android.app.ActivityThread.access$900(ActivityThread.java:179)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1462)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5972)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1399)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)
05-13 00:47:09.158 26922-26922/? D/MediaPlayer﹕ Couldn't open file on client side, trying server side
05-13 00:47:09.158 26922-26922/daford.com.testprepareasync V/MediaPlayer﹕ setVideoSurfaceTexture
05-13 00:47:09.158 26922-26922/daford.com.testprepareasync V/MediaPlayer﹕ prepareAsync
05-13 00:47:09.158 26922-26922/daford.com.testprepareasync D/Activity﹕ performCreate Call secproduct feature valuefalse
05-13 00:47:09.158 26922-26922/daford.com.testprepareasync D/Activity﹕ performCreate Call debug elastic valuetrue
05-13 00:47:09.158 26922-26936/daford.com.testprepareasync D/MediaHTTPConnection﹕ filterOutInternalHeaders: key=User-Agent, val= Samsung SM-N910T stagefright/Beyonce/1.1.9 (Linux;Android 5.0.1)
05-13 00:47:09.168 26922-26932/daford.com.testprepareasync D/MediaHTTPConnection﹕ proxy null port 0
05-13 00:47:09.178 26922-26951/daford.com.testprepareasync D/OpenGLRenderer﹕ Render dirty regions requested: true
05-13 00:47:09.188 26922-26932/daford.com.testprepareasync I/System.out﹕ (HTTPLog)-Static: SBServiceAPI: getService class android.os.ServiceManager
05-13 00:47:09.188 26922-26932/daford.com.testprepareasync I/System.out﹕ (HTTPLog)-Static: isSBSettingEnabled false
05-13 00:47:09.188 26922-26932/daford.com.testprepareasync I/System.out﹕ (HTTPLog)-Static: isShipBuild true
05-13 00:47:09.188 26922-26932/daford.com.testprepareasync I/System.out﹕ (HTTPLog)-Thread-5219-671715901: SmartBonding Enabling is false, SHIP_BUILD is true, log to file is false, DBG is false
05-13 00:47:09.188 26922-26932/daford.com.testprepareasync I/System.out﹕ (HTTPLog)-Static: isSBSettingEnabled false
05-13 00:47:09.198 26922-26951/daford.com.testprepareasync I/Adreno﹕ EGLInit: QTI Build: 03/11/15, 56bfead,
05-13 00:47:09.208 26922-26951/daford.com.testprepareasync I/OpenGLRenderer﹕ Initialized EGL, version 1.4
05-13 00:47:09.208 26922-26951/daford.com.testprepareasync I/Adreno﹕ GetNativeFormatFromQctPixelFormat: Invalid qct format (611)
05-13 00:47:09.208 26922-26951/daford.com.testprepareasync I/Adreno﹕ GetNativeFormatFromQctPixelFormat: Invalid qct format (611)
05-13 00:47:09.208 26922-26951/daford.com.testprepareasync I/Adreno﹕ GetNativeFormatFromQctPixelFormat: Invalid qct format (611)
05-13 00:47:09.208 26922-26951/daford.com.testprepareasync I/Adreno﹕ GetNativeFormatFromQctPixelFormat: Invalid qct format (611)
05-13 00:47:09.208 26922-26951/daford.com.testprepareasync I/Adreno﹕ GetNativeFormatFromQctPixelFormat: Invalid qct format (612)
05-13 00:47:09.208 26922-26951/daford.com.testprepareasync I/Adreno﹕ GetNativeFormatFromQctPixelFormat: Invalid qct format (612)
05-13 00:47:09.208 26922-26951/daford.com.testprepareasync I/Adreno﹕ GetNativeFormatFromQctPixelFormat: Invalid qct format (612)
05-13 00:47:09.208 26922-26951/daford.com.testprepareasync I/Adreno﹕ GetNativeFormatFromQctPixelFormat: Invalid qct format (612)
05-13 00:47:09.218 26922-26951/daford.com.testprepareasync D/OpenGLRenderer﹕ Get maximum texture size. GL_MAX_TEXTURE_SIZE is 16384
05-13 00:47:09.218 26922-26951/daford.com.testprepareasync D/OpenGLRenderer﹕ Enabling debug mode 0
05-13 00:47:09.248 26922-26922/daford.com.testprepareasync I/Timeline﹕ Timeline: Activity_idle id: android.os.BinderProxy@2a4fcf93 time:2871668
05-13 00:47:09.268 26922-26932/daford.com.testprepareasync I/System.out﹕ KnoxVpnUidStorageknoxVpnSupported API value returned is false
05-13 00:47:09.428 26922-26932/daford.com.testprepareasync V/MediaHTTPConnection﹕ mTotalSize is -1
05-13 00:47:09.428 26922-26956/daford.com.testprepareasync D/MediaHTTPConnection﹕ setReadTimeOut = 30000ms
--- 这是延迟 ---（注意上面的行，什么是 setReadTimeOut 以及如何控制它以及它是否相关？）
05-13 00:47:30.168 26922-26936/daford.com.testprepareasync V/MediaPlayer﹕ message received msg=200, ext1=973, ext2=0
05-13 00:47:30.168 26922-26936/daford.com.testprepareasync W/MediaPlayer﹕ info/warning (973, 0)
05-13 00:47:30.168 26922-26936/daford.com.testprepareasync V/MediaPlayer﹕ callback application
05-13 00:47:30.168 26922-26936/daford.com.testprepareasync V/MediaPlayer﹕ back from callback
05-13 00:47:30.168 26922-26936/daford.com.testprepareasync V/MediaPlayer﹕ message received msg=1, ext1=0, ext2=0
05-13 00:47:30.168 26922-26936/daford.com.testprepareasync V/MediaPlayer﹕ prepared
05-13 00:47:30.168 26922-26936/daford.com.testprepareasync V/MediaPlayer﹕ callback application
05-13 00:47:30.168 26922-26936/daford.com.testprepareasync V/MediaPlayer﹕ back from callback
