android - MediaRecorder throw "java.lang.RuntimeException: start failed: -2147483648" when trying to record audio on LG G Watch -

i trying record audio in app on lg g watch. following code throws runtimeexception message "start failed: -2147483648" @ statement "recorder.start();". wondering i'm doing wrong here.

i have tried lot of different set of parameters, example audiosource:

recorder.setaudiosource(mediarecorder.audiosource.default); //-and- recorder.setaudiosource(mediarecorder.audiosource.mic); 

also outputformat 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 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 , without line             string filename = mmainactivity.getexternalfilesdir(null) + "/my_recording.mp4"; // changed corresponding extension name 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 thrown here             }             catch (illegalstateexception e) {                 log.d("debug", "illegalstateexception while start(): " + e.getmessage());             }             log.d("debug", "after start"); 

------------edit--------------------

here 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 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.         @ android.media.mediarecorder.start(native method)         @ com.company.project.mainactivity$1.onlayoutinflated(mainactivity.java:56)         @ android.support.wearable.view.watchviewstub.inflate(watchviewstub.java:133)         @ android.support.wearable.view.watchviewstub.onmeasure(watchviewstub.java:141)         @ android.view.view.measure(view.java:16648)         @ android.view.viewgroup.measurechildwithmargins(viewgroup.java:5125)         @ android.widget.framelayout.onmeasure(framelayout.java:310)         @ android.view.view.measure(view.java:16648)         @ android.view.viewgroup.measurechildwithmargins(viewgroup.java:5125)         @ android.widget.framelayout.onmeasure(framelayout.java:310)         @ com.android.internal.policy.impl.phonewindow$decorview.onmeasure(phonewindow.java:2338)         @ android.view.view.measure(view.java:16648)         @ android.view.viewrootimpl.performmeasure(viewrootimpl.java:1959)         @ android.view.viewrootimpl.measurehierarchy(viewrootimpl.java:1145)         @ android.view.viewrootimpl.performtraversals(viewrootimpl.java:1396)         @ android.view.viewrootimpl.dotraversal(viewrootimpl.java:1032)         @ android.view.viewrootimpl$traversalrunnable.run(viewrootimpl.java:5657)         @ android.view.choreographer$callbackrecord.run(choreographer.java:761)         @ android.view.choreographer.docallbacks(choreographer.java:574)         @ android.view.choreographer.doframe(choreographer.java:544)         @ android.view.choreographer$framedisplayeventreceiver.run(choreographer.java:747)         @ android.os.handler.handlecallback(handler.java:733)         @ android.os.handler.dispatchmessage(handler.java:95)         @ android.os.looper.loop(looper.java:136)         @ android.app.activitythread.main(activitythread.java:5026)         @ java.lang.reflect.method.invokenative(native method)         @ java.lang.reflect.method.invoke(method.java:515)         @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:777)         @ com.android.internal.os.zygoteinit.main(zygoteinit.java:602)         @ 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: have following permissions in 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, audiorecord. here youtube video google developers talking how recording audio speech recognition:

https://www.youtube.com/watch?v=sha_w3_5c2c#t=1970