我正试图用RTSP中视频摄像机的视频流制作一个屏幕。我在SurfaceView中使用MediaPlayer，但我也尝试使用VideoView，但这些都不适用于Android 7(sdk 24(，在其他版本上，我的代码效果很好。
这是代码：
class MainActivity : AppCompatActivity(), SurfaceHolder.Callback, MediaPlayer.OnPreparedListener {
private var mediaPlayer: MediaPlayer? = null
private var vidHolder: SurfaceHolder? = null
private var vidSurface: SurfaceView? = null
private var progress: ProgressBar? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
vidSurface = findViewById(R.id.videoView)
progress = findViewById(R.id.progress)
progress?.visibility = View.VISIBLE
vidHolder = vidSurface?.holder
vidHolder?.addCallback(this)
}
override fun surfaceCreated(holder: SurfaceHolder) {
try {
if (mediaPlayer != null) {
if (!mediaPlayer!!.isPlaying) mediaPlayer?.start()
} else {
mediaPlayer = MediaPlayer()
mediaPlayer?.setDataSource(CAMERA2_URL)
mediaPlayer?.setOnPreparedListener(this)
mediaPlayer?.setAudioAttributes(
AudioAttributes.Builder().setContentType(
AudioAttributes.CONTENT_TYPE_MOVIE
).build()
)
mediaPlayer?.prepareAsync()
}
mediaPlayer?.setDisplay(vidHolder)
} catch (e: Exception) {
e.printStackTrace()
}
}
override fun onPrepared(mp: MediaPlayer?) {
progress?.visibility = View.GONE
mediaPlayer?.start()
}
override fun onDestroy() {
super.onDestroy()
mediaPlayer?.release()
}
override fun surfaceChanged(holder: SurfaceHolder, format: Int, width: Int, height: Int) {}
override fun surfaceDestroyed(holder: SurfaceHolder) {}
}
以下是我在android 7设备上启动应用程序时的完整日志：
I/art: Not late-enabling -Xcheck:jni (already on)
W/art: Unexpected CPU variant for X86 using defaults: x86
W/System: ClassLoader referenced unknown path: /data/app/com.example.rtspcameratest-1/lib/x86
W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter androidx.vectordrawable.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
I/art: Rejecting re-init on previously-failed class java.lang.Class<androidx.core.view.ViewCompat$2>: java.lang.NoClassDefFoundError: Failed resolution of: Landroid/view/View$OnUnhandledKeyEventListener;
I/art: at void androidx.core.view.ViewCompat.setBackground(android.view.View, android.graphics.drawable.Drawable) (ViewCompat.java:2678)
I/art: at void androidx.appcompat.widget.ActionBarContainer.<init>(android.content.Context, android.util.AttributeSet) (ActionBarContainer.java:63)
I/art: at java.lang.Object java.lang.reflect.Constructor.newInstance0!(java.lang.Object[]) (Constructor.java:-2)
I/art: at java.lang.Object java.lang.reflect.Constructor.newInstance(java.lang.Object[]) (Constructor.java:430)
I/art: at android.view.View android.view.LayoutInflater.createView(java.lang.String, java.lang.String, android.util.AttributeSet) (LayoutInflater.java:645)
I/art: at android.view.View android.view.LayoutInflater.createViewFromTag(android.view.View, java.lang.String, android.content.Context, android.util.AttributeSet, boolean) (LayoutInflater.java:787)
I/art: at android.view.View android.view.LayoutInflater.createViewFromTag(android.view.View, java.lang.String, android.content.Context, android.util.AttributeSet) (LayoutInflater.java:727)
I/art: at void android.view.LayoutInflater.rInflate(org.xmlpull.v1.XmlPullParser, android.view.View, android.content.Context, android.util.AttributeSet, boolean) (LayoutInflater.java:858)
I/art: at void android.view.LayoutInflater.rInflateChildren(org.xmlpull.v1.XmlPullParser, android.view.View, android.util.AttributeSet, boolean) (LayoutInflater.java:821)
I/art: at android.view.View android.view.LayoutInflater.inflate(org.xmlpull.v1.XmlPullParser, android.view.ViewGroup, boolean) (LayoutInflater.java:518)
I/art: at android.view.View android.view.LayoutInflater.inflate(int, android.view.ViewGroup, boolean) (LayoutInflater.java:426)
I/art: at android.view.View android.view.LayoutInflater.inflate(int, android.view.ViewGroup) (LayoutInflater.java:377)
I/art: at android.view.ViewGroup androidx.appcompat.app.AppCompatDelegateImpl.createSubDecor() (AppCompatDelegateImpl.java:896)
I/art: at void androidx.appcompat.app.AppCompatDelegateImpl.ensureSubDecor() (AppCompatDelegateImpl.java:806)
I/art: at void androidx.appcompat.app.AppCompatDelegateImpl.setContentView(int) (AppCompatDelegateImpl.java:693)
I/art: at void androidx.appcompat.app.AppCompatActivity.setContentView(int) (AppCompatActivity.java:170)
I/art: at void com.example.rtspcameratest.MainActivity.onCreate(android.os.Bundle) (MainActivity.kt:30)
I/art: at void android.app.Activity.performCreate(android.os.Bundle) (Activity.java:6662)
I/art: at void android.app.Instrumentation.callActivityOnCreate(android.app.Activity, android.os.Bundle) (Instrumentation.java:1118)
I/art: at android.app.Activity android.app.ActivityThread.performLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent) (ActivityThread.java:2599)
I/art: at void android.app.ActivityThread.handleLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:2707)
I/art: at void android.app.ActivityThread.-wrap12(android.app.ActivityThread, android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:-1)
I/art: at void android.app.ActivityThread$H.handleMessage(android.os.Message) (ActivityThread.java:1460)
I/art: at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:102)
I/art: at void android.os.Looper.loop() (Looper.java:154)
I/art: at void android.app.ActivityThread.main(java.lang.String[]) (ActivityThread.java:6077)
I/art: at java.lang.Object java.lang.reflect.Method.invoke!(java.lang.Object, java.lang.Object[]) (Method.java:-2)
I/art: at void com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run() (ZygoteInit.java:866)
I/art: at void com.android.internal.os.ZygoteInit.main(java.lang.String[]) (ZygoteInit.java:756)
I/art: Caused by: java.lang.ClassNotFoundException: Didn't find class "android.view.View$OnUnhandledKeyEventListener" on path: DexPathList[[zip file "/data/app/com.example.rtspcameratest-1/base.apk"],nativeLibraryDirectories=[/data/app/com.example.rtspcameratest-1/lib/x86, /system/lib, /vendor/lib]]
I/art: at java.lang.Class dalvik.system.BaseDexClassLoader.findClass(java.lang.String) (BaseDexClassLoader.java:56)
I/art: at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String, boolean) (ClassLoader.java:380)
I/art: at java.lang.Class java.lang.ClassLoader.loadClass(java.lang.String) (ClassLoader.java:312)
I/art: at void androidx.core.view.ViewCompat.setBackground(android.view.View, android.graphics.drawable.Drawable) (ViewCompat.java:2678)
I/art: at void androidx.appcompat.widget.ActionBarContainer.<init>(android.content.Context, android.util.AttributeSet) (ActionBarContainer.java:63)
I/art: at java.lang.Object java.lang.reflect.Constructor.newInstance0!(java.lang.Object[]) (Constructor.java:-2)
I/art: at java.lang.Object java.lang.reflect.Constructor.newInstance(java.lang.Object[]) (Constructor.java:430)
I/art: at android.view.View android.view.LayoutInflater.createView(java.lang.String, java.lang.String, android.util.AttributeSet) (LayoutInflater.java:645)
I/art: at android.view.View android.view.LayoutInflater.createViewFromTag(android.view.View, java.lang.String, android.content.Context, android.util.AttributeSet, boolean) (LayoutInflater.java:787)
I/art: at android.view.View android.view.LayoutInflater.createViewFromTag(android.view.View, java.lang.String, android.content.Context, android.util.AttributeSet) (LayoutInflater.java:727)
I/art: at void android.view.LayoutInflater.rInflate(org.xmlpull.v1.XmlPullParser, android.view.View, android.content.Context, android.util.AttributeSet, boolean) (LayoutInflater.java:858)
I/art: at void android.view.LayoutInflater.rInflateChildren(org.xmlpull.v1.XmlPullParser, android.view.View, android.util.AttributeSet, boolean) (LayoutInflater.java:821)
I/art: at android.view.View android.view.LayoutInflater.inflate(org.xmlpull.v1.XmlPullParser, android.view.ViewGroup, boolean) (LayoutInflater.java:518)
I/art: at android.view.View android.view.LayoutInflater.inflate(int, android.view.ViewGroup, boolean) (LayoutInflater.java:426)
I/art: at android.view.View android.view.LayoutInflater.inflate(int, android.view.ViewGroup) (LayoutInflater.java:377)
I/art: at android.view.ViewGroup androidx.appcompat.app.AppCompatDelegateImpl.createSubDecor() (AppCompatDelegateImpl.java:896)
I/art: at void androidx.appcompat.app.AppCompatDelegateImpl.ensureSubDecor() (AppCompatDelegateImpl.java:806)
I/art: at void androidx.appcompat.app.AppCompatDelegateImpl.setContentView(int) (AppCompatDelegateImpl.java:693)
I/art: at void androidx.appcompat.app.AppCompatActivity.setContentView(int) (AppCompatActivity.java:170)
I/art: at void com.example.rtspcameratest.MainActivity.onCreate(android.os.Bundle) (MainActivity.kt:30)
I/art: at void android.app.Activity.performCreate(android.os.Bundle) (Activity.java:6662)
I/art: at void android.app.Instrumentation.callActivityOnCreate(android.app.Activity, android.os.Bundle) (Instrumentation.java:1118)
I/art: at android.app.Activity android.app.ActivityThread.performLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent) (ActivityThread.java:2599)
I/art: at void android.app.ActivityThread.handleLaunchActivity(android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:2707)
I/art: at void android.app.ActivityThread.-wrap12(android.app.ActivityThread, android.app.ActivityThread$ActivityClientRecord, android.content.Intent, java.lang.String) (ActivityThread.java:-1)
I/art: at void android.app.ActivityThread$H.handleMessage(android.os.Message) (ActivityThread.java:1460)
I/art: at void android.os.Handler.dispatchMessage(android.os.Message) (Handler.java:102)
I/art: at void android.os.Looper.loop() (Looper.java:154)
I/art: at void android.app.ActivityThread.main(java.lang.String[]) (ActivityThread.java:6077)
I/art: at java.lang.Object java.lang.reflect.Method.invoke!(java.lang.Object, java.lang.Object[]) (Method.java:-2)
I/art: at void com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run() (ZygoteInit.java:866)
I/art: at void com.android.internal.os.ZygoteInit.main(java.lang.String[]) (ZygoteInit.java:756)
W/MediaPlayer: info/warning (701, 0)
I/OpenGLRenderer: Initialized EGL, version 1.4
D/OpenGLRenderer: Swap behavior 1
W/OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
D/OpenGLRenderer: Swap behavior 0
D/EGL_emulation: eglCreateContext: 0xa9305240: maj 2 min 0 rcv 2
D/EGL_emulation: eglMakeCurrent: 0xa9305240: ver 2 0 (tinfo 0xa9303520)
D/EGL_emulation: eglMakeCurrent: 0xa9305240: ver 2 0 (tinfo 0xa9303520)
E/MediaPlayer: error (1, -2147483648)
E/MediaPlayer: Error (1,-2147483648)
我的rtsp流配置：h264(基线(，yuv420p(渐进(，704x576，每秒15帧，25 tbr，90k tbn，30 tbc
当我在android 7.0上启动它时，它显示错误(1，-2147483648(。以前它在安卓5上也不起作用，但我们将配置文件更改为Baseline，除了安卓7.0，其他地方都很好(甚至在安卓7.1上(。我尝试过一些解决方案，但都无济于事。此外，我曾尝试使用VLC库和修复android 7的问题，但它在apk中的smth权重约为80 mb，这对我的应用程序来说太多了。
我认为问题出在流配置中，但真的不知道它到底是什么…安卓7的情况对我来说似乎有点奇怪，因为官方信息中没有关于安卓7什么特别的东西，也许你知道它是什么？
那么你对rtsp有类似的问题吗？你知道如何以正确的方式为android配置rtsp流吗？安卓7版本到底有什么问题？我该怎么做才能让它发挥作用？感谢您的帮助！
更新
我通过使用ExoPlayer-lib实现了它，但这花了我一些时间，而且无论如何，我的项目增加了重量(不过没有使用vlc那么多(。我仍然不明白为什么默认的Android MediaPlayer不起作用，如果出现解决方案，我会毫不犹豫地返回MediaPlayer代码，因为它比外部层简单得多。
在(模块(build.gradle文件中，在依赖项｛…｝之后的末尾删除以下conf
configurations.all {
resolutionStrategy.eachDependency { DependencyResolveDetails details ->
def requested = details.requested
if (requested.group == "androidx") {
if (!requested.name.startsWith("multidex")) {
details.useVersion "${targetSdk}.+"
}
}
}
}