android - RuntimeException:停止失败。用于媒体记录器
问题描述
请注意,这是一个RuntimeException
问题,而不是更常见的IllegalStateException
. 我在 Stackoverflow 1、2中查看了以下问题,但他们不知道如何解决我的问题(实际上他们没有任何答案,而且代码片段与我的不完全一样,所以我很难追踪问题与我在我的情况下所做的一样)。
所以我的代码如下:
private var mediaProjection: MediaProjection? = null
private var mediaRecorder: MediaRecorder
private var virtualDisplay: VirtualDisplay? = null
private var width = 567
private var height = 1222
fun startScreenRecording() {
projectionManager =
getSystemService(Context.MEDIA_PROJECTION_SERVICE) as MediaProjectionManager
mediaProjection = projectionManager.getMediaProjection(resultCode, data)?.let {
initRecorder()
virtualDisplay = mediaProjection?.createVirtualDisplay(
"MainScreen", width, height, dpi,
DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR, mediaRecorder.surface, null, null
)
mediaRecorder.start()
}
}
private fun initRecorder() {
mediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE)
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP)
mediaRecorder.setOutputFile(saveFile)
mediaRecorder.setVideoSize(width, height)
mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264)
mediaRecorder.setVideoEncodingBitRate(5 * 1024 * 1024)
mediaRecorder.setVideoFrameRate(30)
try {
mediaRecorder.prepare()
} catch (e: IOException) {
//TODO handle errors
}
}
fun stopRecord(): Boolean {
mediaRecorder.stop()
mediaRecorder.reset()
virtualDisplay?.release()
mediaProjection?.stop()
return true
}
我收到以下异常:
java.lang.RuntimeException: Unable to start service com.mobile.android.recorder.screen.RecorderService@3db2c5c with Intent { cmp=com.mobile.android.staging/com.mobile.android.recorder.screen.RecorderService (has extras) }: java.lang.RuntimeException: stop failed.
at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:3696)
at android.app.ActivityThread.-wrap21(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1801)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6944)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
Caused by: java.lang.RuntimeException: stop failed.
at android.media.MediaRecorder._stop(Native Method)
at android.media.MediaRecorder.stop(MediaRecorder.java:1343)
at com.mobile.android.recorder.screen.ScreenRecorderUtil.stopRecord(ScreenRecorderUtil.kt:83)
at com.mobile.android.recorder.screen.RecorderService.stopScreenRecording(RecorderService.kt:117)
at com.mobile.android.recorder.screen.RecorderService.onStartCommand(RecorderService.kt:90)
at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:3679)
at android.app.ActivityThread.-wrap21(Unknown Source:0)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1801)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6944)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
请注意,异常发生在stopRecord
函数的第一行。可能堆栈跟踪不会完全有意义,但这是因为我试图去除所有不必要的代码复杂性。
还要注意我设置的非常奇怪的宽度和高度private var width = 567
private var height = 1222
。这使我有强烈的可重现错误。在我的实际代码中,值是 720 和 1080,它们大部分都可以工作,但是很少有设备会出现上述错误。这就是说,我确信以下行正在为停止时抛出的异常奠定基础:
virtualDisplay = mediaProjection?.createVirtualDisplay(
"MainScreen", width, height, dpi,
DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR, mediaRecorder.surface, null, null
)
该stop
方法的 Android 文档指出:
* Note that a RuntimeException is intentionally thrown to the
* application, if no valid audio/video data has been received when stop()
* is called.
将此与我观察到的相结合,我得出结论,支持的宽度和高度是特定于设备的,我需要正确配置才能获得任何记录。但是,我从未找到任何文档如何确定特定设备的宽度和高度的工作对(例如,就像我们对相机getSupportedPreviewSizes
方法Camera
的预览大小所做的那样)。有人可以建议如何避免这个错误吗?