调用MediaRecorder使AndroidStudio中的应用程序崩溃 [英] Calling MediaRecorder crashes app in AndroidStudio
问题描述
我试图创建一个设置并开始录音的类,但是一旦我单击该按钮,应用就会崩溃. iv将问题隔离到我为MediRecorder设置参数的位置.
I am trying to create a class that sets and starts audio recording but as soon as I click the button the app crashes. Iv isolated the problem to where I set the parameters for the MediRecorder.
private void startRec() throws IOException {
if (mrecorder!=null)
mrecorder.release();
mrecorder= new MediaRecorder();
-> mrecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
/*
mrecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mrecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
mrecorder.setOutputFile(MFILE);
mrecorder.prepare();
mrecorder.start();
*/
}
执行音符开头上方带有箭头的线时,它会崩溃.我还为清单添加了以下权限:
It crashes when the line with the arrow above the start of the notes is executed. I added the following permission to the manifest as well:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
任何帮助,不胜感激.
Any help much appreciated.
更新的LOGCAT
[05-12 00:39:13.299 30086:30158 D/] ro.exynos.dss isEnabled:0 05-12 00:39:13.309 30086-30158/record66.record6 D/mali_winsys:new_window_surface返回0x3000,[1440x2560] -format:1 05-12 00:39:13.319 30086-30086/record66.record6 W/DisplayListCanvas:DisplayListCanvas在未绑定的RenderNode上启动(没有mOwningView) 05-12 00:39:13.319 30086-30158/record66.record6 D/libGLESv1:DTS_GLAPI:包:record66.record6不允许DTS 05-12 00:39:13.359 30086-30086/record66.record6 D/ViewRootImpl:MSG_RESIZED_REPORT:ci = Rect(0,96-0,0)vi = Rect(0,96-0,0)或= 1 05-12 00:39:13.389 30086-30086/record66.record6 I/时间轴:时间轴:Activity_idle id:android.os.BinderProxy@682466c时间:234401322 05-12 00:39:15.749 30086-30086/record66.record6 D/ViewRootImpl:ViewPostImeInputStage processPointer 0 05-12 00:39:15.879 30086-30086/record66.record6 D/ViewRootImpl:ViewPostImeInputStage processPointer 1 05-12 00:39:15.929 30086-30086/record66.record6 D/Android运行时:关闭VM 05-12 00:39:15.939 30086-30086/record66.record6 E/Android运行时:致命异常:主 处理:record66.record6,PID:30086 java.lang.RuntimeException:setAudioSource失败. 在android.media.MediaRecorder._setAudioSource(本机方法) 在android.media.MediaRecorder.setAudioSource(MediaRecorder.java:488) 在record66.record6.MainActivity.startRec(MainActivity.java:58) 在record66.record6.MainActivity.onClick(MainActivity.java:94) 在android.view.View.performClick(View.java:5697) 在android.widget.TextView.performClick(TextView.java:10815) 在android.view.View $ PerformClick.run(View.java:22526) 在android.os.Handler.handleCallback(Handler.java:739) 在android.os.Handler.dispatchMessage(Handler.java:95) 在android.os.Looper.loop(Looper.java:158) 在android.app.ActivityThread.main(ActivityThread.java:7229) 在java.lang.reflect.Method.invoke(本机方法) 在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:1230) 在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) 05-12 00:39:17.909 30086-30086/record66.record6 I/Process:正在发送信号. PID:30086 SIG:9
[ 05-12 00:39:13.299 30086:30158 D/ ] ro.exynos.dss isEnabled: 0 05-12 00:39:13.309 30086-30158/record66.record6 D/mali_winsys: new_window_surface returns 0x3000, [1440x2560]-format:1 05-12 00:39:13.319 30086-30086/record66.record6 W/DisplayListCanvas: DisplayListCanvas is started on unbinded RenderNode (without mOwningView) 05-12 00:39:13.319 30086-30158/record66.record6 D/libGLESv1: DTS_GLAPI : DTS is not allowed for Package : record66.record6 05-12 00:39:13.359 30086-30086/record66.record6 D/ViewRootImpl: MSG_RESIZED_REPORT: ci=Rect(0, 96 - 0, 0) vi=Rect(0, 96 - 0, 0) or=1 05-12 00:39:13.389 30086-30086/record66.record6 I/Timeline: Timeline: Activity_idle id: android.os.BinderProxy@682466c time:234401322 05-12 00:39:15.749 30086-30086/record66.record6 D/ViewRootImpl: ViewPostImeInputStage processPointer 0 05-12 00:39:15.879 30086-30086/record66.record6 D/ViewRootImpl: ViewPostImeInputStage processPointer 1 05-12 00:39:15.929 30086-30086/record66.record6 D/AndroidRuntime: Shutting down VM 05-12 00:39:15.939 30086-30086/record66.record6 E/AndroidRuntime: FATAL EXCEPTION: main Process: record66.record6, PID: 30086 java.lang.RuntimeException: setAudioSource failed. at android.media.MediaRecorder._setAudioSource(Native Method) at android.media.MediaRecorder.setAudioSource(MediaRecorder.java:488) at record66.record6.MainActivity.startRec(MainActivity.java:58) at record66.record6.MainActivity.onClick(MainActivity.java:94) at android.view.View.performClick(View.java:5697) at android.widget.TextView.performClick(TextView.java:10815) at android.view.View$PerformClick.run(View.java:22526) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:158) at android.app.ActivityThread.main(ActivityThread.java:7229) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120) 05-12 00:39:17.909 30086-30086/record66.record6 I/Process: Sending signal. PID: 30086 SIG: 9
推荐答案
And let us know what error you are getting. So can help.
package com.example.dhrupalpatel.test;
import android.app.Activity;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.os.Environment;
import java.io.File;
import java.io.IOException;
public class MainActivity extends Activity implements View.OnClickListener{
MediaRecorder mrecorder;
boolean mStartRecording=false;
Button start, stop;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
start =(Button)findViewById(R.id.start);
stop =(Button)findViewById(R.id.stop);
start.setOnClickListener(this);
stop.setOnClickListener(this);
}
private void startRec() throws IOException {
boolean mExternalStorageAvailable = false;
boolean mExternalStorageWriteable = false;
String state = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(state)) {
// We can read and write the media
mExternalStorageAvailable = mExternalStorageWriteable = true;
} else if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(state)) {
// We can only read the media
mExternalStorageAvailable = true;
mExternalStorageWriteable = false;
} else {
// Something else is wrong. It may be one of many other states, but all we need
// to know is we can neither read nor write
mExternalStorageAvailable = mExternalStorageWriteable = false;
}
File sdCardDirectory= Environment
.getExternalStorageDirectory();
if(mExternalStorageAvailable && !sdCardDirectory.exists())
{
sdCardDirectory.mkdir();
}
File f= new File(sdCardDirectory.getPath()+"/"+System.currentTimeMillis()+".mp3");
if( mrecorder == null ) {
mrecorder = new MediaRecorder();
mrecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mrecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mrecorder.setOutputFile(f.getPath());
mrecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
}
if(!mStartRecording) {
try {
mrecorder.prepare();
mrecorder.start();
mStartRecording = true;
} catch (IOException e) {
e.printStackTrace();
}
}
}
private void stopRec() throws IOException {
if(mStartRecording) {
mStartRecording = false;
mrecorder.stop();
mrecorder.reset();
mrecorder.release();
mrecorder = null;
}
}
@Override
public void onClick(View v) {
switch (v.getId())
{
case R.id.start:
try {
startRec();
} catch (IOException e) {
e.printStackTrace();
}
break;
case R.id.stop:
try {
stopRec();
} catch (IOException e) {
e.printStackTrace();
}
break;
}
}
}
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