java - 调用MediaRecorder使Android Studio中的应用程序崩溃

我正在尝试创建一个设置并开始录音的类，但是一旦我单击按钮，应用程序就会崩溃。 iv将问题隔离到我为MediRecorder设置参数的位置。

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();

    */
}

执行注释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:

<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。

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

最佳答案

请查看logcat是什么。

让我们知道您遇到了什么错误。因此可以提供帮助。

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;
    }

}
}