【发布时间】：2016-06-29 02:30:39
【问题描述】：
当我对 MediaRecorder 对象调用 setVideoSource 时，它会引发 IllegalStateException。我检查了这些：
(Android SDk 2.1) Getting error when I use setAudioSource and setVideoSource
Why following code shows setVideoSource failed exception setvideosource-failed-exception
MediaPlayer.prepare() throws IllegalStateException on Android L
但建议的解决方案要么没有帮助，要么不合适。
代码如下：
private void initRecorder() {
Log.i(TAG, "InitRecorder");
if(mRecorder == null) {
mRecorder = new MediaRecorder();
mRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
mRecorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
mRecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
mRecorder.setVideoSize(640, 480);
mRecorder.setVideoFrameRate(30);
mRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);
mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
CamcorderProfile cpHigh = CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH);
mRecorder.setProfile(cpHigh);
mRecorder.setOutputFile("/sdcard/video.mp4");
mRecorder.setMaxDuration(50000); // 50 seconds
mRecorder.setMaxFileSize(5000000); // Approximately 5 megabytes
}
}
我确定 setOutputFormat 没有在 setVideoSource 之前被调用，正在请求和授予正确的权限，并且只存在一个 VideoRecorder 对象。
我在装有 Marshmallow 的 Moto G 上使用 Android SDK 23。
有人有什么想法吗？从异常中获取更多信息会很有用，但不知何故 Android Studio 不会让我了解它。我想一个相关的问题是如何在抛出异常时检查异常？它是否可能包含更多信息，而不仅仅是 IllegalStateException 的事实？
这个异常现在变成了一个RunTimeException，这让人很困惑。我已经取消了对它所做的任何更改，所以它应该抛出 IllegalStateException 但它现在几乎卡在了 RunTimeException 上。嗯……
这是错误日志：
06-28 13:10:14.989 30933-30933/com.dogtail W/ActivityThread: Application com.dogtail is waiting for the debugger on port 8100...
06-28 13:10:14.990 30933-30933/com.dogtail I/System.out: Sending WAIT chunk
06-28 13:10:15.142 30933-30939/com.dogtail I/art: Debugger is active
06-28 13:10:15.190 30933-30933/com.dogtail I/System.out: Debugger has connected
06-28 13:10:15.191 30933-30933/com.dogtail I/System.out: waiting for debugger to settle...
06-28 13:10:15.391 30933-30933/com.dogtail I/System.out: waiting for debugger to settle...
06-28 13:10:15.591 30933-30933/com.dogtail I/System.out: waiting for debugger to settle...
06-28 13:10:15.791 30933-30933/com.dogtail I/System.out: waiting for debugger to settle...
06-28 13:10:15.992 30933-30933/com.dogtail I/System.out: waiting for debugger to settle...
06-28 13:10:16.192 30933-30933/com.dogtail I/System.out: waiting for debugger to settle...
06-28 13:10:16.392 30933-30933/com.dogtail I/System.out: waiting for debugger to settle...
06-28 13:10:16.592 30933-30933/com.dogtail I/System.out: debugger has settled (1312)
06-28 13:10:16.636 30933-30933/com.dogtail W/System: ClassLoader referenced unknown path: /data/app/com.dogtail-1/lib/arm
06-28 13:10:17.599 30933-30933/com.dogtail W/System: ClassLoader referenced unknown path: /data/app/com.dogtail-1/lib/arm
06-28 13:10:17.681 30933-30933/com.dogtail I/APPLICATION: onCreate
06-28 13:10:17.934 30933-31061/com.dogtail I/Adreno-EGL: <qeglDrvAPI_eglInitialize:379>: QUALCOMM Build: 10/09/15, 6cbbf7d, I3193f6e94a
06-28 13:10:17.936 30933-31061/com.dogtail I/OpenGLRenderer: Initialized EGL, version 1.4
06-28 13:10:20.588 30933-30933/com.dogtail I/VideoRecorder: OnCreate
06-28 13:10:20.588 30933-30933/com.dogtail I/VideoRecorder: InitRecorder
06-28 13:10:20.598 30933-30933/com.dogtail E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.dogtail, PID: 30933
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.dogtail/com.dogtail.VideoRecorder}: java.lang.RuntimeException: setVideoSource failed.
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2426)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2490)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1354)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5443)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
Caused by: java.lang.RuntimeException: setVideoSource failed.
at android.media.MediaRecorder.setVideoSource(Native Method)
at com.dogtail.VideoRecorder.initRecorder(VideoRecorder.java:45)
at com.dogtail.VideoRecorder.onCreate(VideoRecorder.java:30)
at android.app.Activity.performCreate(Activity.java:6245)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1130)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2379)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2490)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1354)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5443)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
【问题讨论】：
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标签： java android android-camera