问题描述
我想在我的一个LG G观看的应用程序录制音频。下面code抛出的RuntimeException与消息启动失败:-2147483648的声明recorder.start();。想知道我在做什么错在这里。
我已经尝试了很多不同的参数,例如为AudioSource:
recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
//-和-
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
也为OUTPUTFORMAT我曾尝试
recorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
//-和-
recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
//-和-
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
也尝试了不同的AudioEn codeR
recorder.setAudioEn codeR(MediaRecorder.AudioEn coder.DEFAULT);
//-和-
recorder.setAudioEn codeR(MediaRecorder.AudioEn coder.AMR_NB);
下面是源$ C $ C:
最后MediaRecorder记录=新MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
recorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
recorder.setAudioEn codeR(MediaRecorder.AudioEn coder.DEFAULT);
//recorder.setAudioSamplingRate(8000); //尝试使用和不使用这条线
字符串文件名= mMainActivity.getExternalFilesDir(空)+/my_recording.mp4 //改成相应的扩展名的输出格式
Log.d(调试,输出文件名=+文件名);
recorder.setOutputFile(文件名);
尝试{
。录音机prepare();
}
赶上(IOException异常五){
Log.d(调试,IOException异常而prepare():+ e.getMessage());
}
尝试{
视频下载(1000);
}赶上(InterruptedException的E){
Log.d(调试,InterruptedException的同时Thread.sleep()方法:+ e.getMessage());
}
Log.d(调试,开始前);
尝试{
recorder.start(); //< ---异常抛出这里
}
赶上(IllegalStateException异常五){
Log.d(调试,IllegalStateException异常而开始():+ e.getMessage());
}
Log.d(调试,启动后);
------------编辑--------------------
下面是logcat的输出:
一月9日至22日:33:10.697 8764-8764 / com.company.project D / DEBUG:输出文件名= /storage/emulated/0/Android/data/com.company的.project /文件/ my_recording.mp4
1月9日至22日:33:11.697 8764-8764 / com.company.project D / DEBUG:开始之前
1月9日至22日:33:11.707 8764-8764 / com.company.project E / MediaRecorder:启动失败:-2147483648
1月9日至22日:33:11.707 8764-8764 / com.company.project D / AndroidRuntime:关闭VM
1月9日至22日:33:11.707 8764-8764 / com.company.project W / dalvikvm:主题ID = 1:螺纹未捕获的异常退出(组= 0xada14d70)
1月9日至22日:33:11.737 8764-8764 / com.company.project E / AndroidRuntime:致命异常:主要
工艺:com.company.project,PID:8764
了java.lang.RuntimeException:启动失败。
在android.media.MediaRecorder.start(本机方法)
在com.company.project.MainActivity $ 1.onLayoutInflated(MainActivity.java:56)
在android.support.wearable.view.WatchViewStub.inflate(WatchViewStub.java:133)
在android.support.wearable.view.WatchViewStub.onMeasure(WatchViewStub.java:141)
在android.view.View.measure(View.java:16648)
在android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
在android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
在android.view.View.measure(View.java:16648)
在android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
在android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
在com.android.internal.policy.impl.PhoneWindow $ DecorView.onMeasure(PhoneWindow.java:2338)
在android.view.View.measure(View.java:16648)
在android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1959)
在android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1145)
在android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1396)
在android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1032)
在android.view.ViewRootImpl $ TraversalRunnable.run(ViewRootImpl.java:5657)
在android.view.Choreographer $ CallbackRecord.run(Choreographer.java:761)
在android.view.Choreographer.doCallbacks(Choreographer.java:574)
在android.view.Choreographer.doFrame(Choreographer.java:544)
在android.view.Choreographer $ FrameDisplayEventReceiver.run(Choreographer.java:747)
在android.os.Handler.handleCallback(Handler.java:733)
在android.os.Handler.dispatchMessage(Handler.java:95)
在android.os.Looper.loop(Looper.java:136)
在android.app.ActivityThread.main(ActivityThread.java:5026)
在java.lang.reflect.Method.invokeNative(本机方法)
在java.lang.reflect.Method.invoke(Method.java:515)
在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:777)
在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
在dalvik.system.NativeStart.main(本机方法)
1月9日至22日:33:11.777 8764-8764 / com.company.project I /工艺:发送信号。 PID:8764 SIG:9
请注意:我有以下权限在我的清单:
<使用许可权的android:NAME =android.permission.WRITE_EXTERNAL_STORAGE/>
<使用许可权的android:NAME =android.permission.RECORD_AUDIO/>
我的环境是:
SDK:API 20:Android 4.4系统(奇巧磨损)
构建工具:19.1.0
Android的工作室:0.8.9
您不能在Android Wear,只有AudioRecord使用MediaRecorder。
在这里,YouTube视频,其中谷歌的开发人员在谈论语音识别它们是如何录制的音频:
<一个href=\"https://www.youtube.com/watch?v=sha_w3_5c2c#t=1970\">https://www.youtube.com/watch?v=sha_w3_5c2c#t=1970
I am trying to record audio in my app on a LG G Watch. The following code throws RuntimeException with message "start failed: -2147483648" at the statement "recorder.start();". Wondering what I'm doing wrong here.
I have tried a lot of different set of parameters, for example for AudioSource:
recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
//-and-
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
Also for OutputFormat I have tried
recorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
//-and-
recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
//-and-
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
Also tried different AudioEncoder
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
//-and-
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
Here is the source code:
final MediaRecorder recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
recorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
//recorder.setAudioSamplingRate(8000); // tried with and without this line
String filename = mMainActivity.getExternalFilesDir(null) + "/my_recording.mp4"; // changed to corresponding extension name for the output format
Log.d("DEBUG", "Output filename = " + filename);
recorder.setOutputFile(filename);
try {
recorder.prepare();
}
catch (IOException e) {
Log.d("DEBUG", "IOException while prepare(): " + e.getMessage());
}
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
Log.d("DEBUG", "InterruptedException while Thread.sleep(): " + e.getMessage());
}
Log.d("DEBUG", "before start");
try {
recorder.start(); // <--- exception is thrown here
}
catch (IllegalStateException e) {
Log.d("DEBUG", "IllegalStateException while start(): " + e.getMessage());
}
Log.d("DEBUG", "after start");
------------EDIT--------------------
Here is the logcat output:
09-22 01:33:10.697 8764-8764/com.company.project D/DEBUG﹕ Output filename = /storage/emulated/0/Android/data/com.company.project/files/my_recording.mp4
09-22 01:33:11.697 8764-8764/com.company.project D/DEBUG﹕ before start
09-22 01:33:11.707 8764-8764/com.company.project E/MediaRecorder﹕ start failed: -2147483648
09-22 01:33:11.707 8764-8764/com.company.project D/AndroidRuntime﹕ Shutting down VM
09-22 01:33:11.707 8764-8764/com.company.project W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0xada14d70)
09-22 01:33:11.737 8764-8764/com.company.project E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.company.project, PID: 8764
java.lang.RuntimeException: start failed.
at android.media.MediaRecorder.start(Native Method)
at com.company.project.MainActivity$1.onLayoutInflated(MainActivity.java:56)
at android.support.wearable.view.WatchViewStub.inflate(WatchViewStub.java:133)
at android.support.wearable.view.WatchViewStub.onMeasure(WatchViewStub.java:141)
at android.view.View.measure(View.java:16648)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16648)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2338)
at android.view.View.measure(View.java:16648)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1959)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1145)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1396)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1032)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5657)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
at android.view.Choreographer.doCallbacks(Choreographer.java:574)
at android.view.Choreographer.doFrame(Choreographer.java:544)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5026)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:602)
at dalvik.system.NativeStart.main(Native Method)
09-22 01:33:11.777 8764-8764/com.company.project I/Process﹕ Sending signal. PID: 8764 SIG: 9
NOTE: I have the following permissions in my manifest:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
My environment is:
SDK: API 20: Android 4.4 (KitKat Wear)
Build tool: 19.1.0
Android Studio: 0.8.9
You cannot use MediaRecorder in Android Wear, Only AudioRecord.Here a YouTube video where Google developers talking about how they recording audio for speech recognition:
https://www.youtube.com/watch?v=sha_w3_5c2c#t=1970
这篇关于MediaRecorder扔&QUOT;了java.lang.RuntimeException:启动失败:-2147483648&QUOT;要记录在LG G观看音频时的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!