MediaRecorder：停止所谓处于无效状态：4 [英] MediaRecorder : stop called in invalid state : 4

问题描述

我创建一个通话录音的应用程序，当我试图阻止调用java中记录调试控制台说：MediaRecorder停止所谓的无效状态：4我GOOGLE了很多，但我可以'找不到任何可以帮助我！我已经使用 RECORD_AUDIO 和 WRITE_EXTERNAL_STORAG​​E 权限！这里是我的code的一部分：

 私有类PhoneCallListener扩展PhoneStateListener {
    私人布尔isPhoneCalling = FALSE;
    @燮pressWarnings（德precation）
    @覆盖
    公共无效onCallStateChanged（INT状态，最后弦乐incomingNumber）{
        // TODO自动生成方法存根
        super.onCallStateChanged（州，incomingNumber）;
        字符串路径= Environment.getExternalStorageDirectory（）+/ callrec /;
        最后MediaRecorder记录=新MediaRecorder（）;
        recorder.setAudioSource（MediaRecorder.AudioSource.VOICE_CALL）;
        recorder.setOutputFormat（MediaRecorder.OutputFormat.MPEG_4）;
        recorder.setAudioEn codeR（MediaRecorder.AudioEn coder.AMR_NB）;
        recorder.setOutputFile（路径+/ TEST00000000011110.M4A）;
        如果（TelephonyManager.CALL_STATE_RINGING ==州）{        }
        如果（TelephonyManager.CALL_STATE_OFFHOOK ==州）{
            isPhoneCalling = TRUE;
            尝试{
                。录音机prepare（）;
                recorder.start（）;
            }赶上（例外五）{
            }
        }
        如果（TelephonyManager.CALL_STATE_IDLE ==州）{
            如果（isPhoneCalling）{
                尝试{
                    recorder.stop（）;
                    recorder.reset（）;
                    recorder.release（）;
                }赶上（例外五）{
                    // TODO：处理异常
                }
                意向I = getBaseContext（）。getPackageManager（）
                        .getLaunchIntentForPackage（
                                。getBaseContext（）getPackageName（））;
                i.addFlags（Intent.FLAG_ACTIVITY_CLEAR_TOP）;
                startActivity（ⅰ）;
                isPhoneCalling = FALSE;
            }
        }
    }
}
 

解决方案

终于让我找到一种方法来解决我的问题！
我创建了一个：
公共无效记录（）
在我的课，当我想要录制的音频叫它
此外，我创建了一个功能停止录音！
我希望这对你的工作！
而且这个MediaRecorder API可以很好的在Android 2.3.3到4.3！

I'm creating a call recording app, when I'm trying to stop call recording the Debug Console in java says that: "MediaRecorder stop called in an invalid state : 4" I've Googled a lot but I can't find anything that can help me! I'm already using RECORD_AUDIO and WRITE_EXTERNAL_STORAGE permissions! Here is part of my code:

private class PhoneCallListener extends PhoneStateListener {
    private boolean isPhoneCalling = false;
    @SuppressWarnings("deprecation")
    @Override
    public void onCallStateChanged(int state, final String incomingNumber) {
        // TODO Auto-generated method stub
        super.onCallStateChanged(state, incomingNumber);
        String path = Environment.getExternalStorageDirectory()+"/callrec/";
        final MediaRecorder recorder = new MediaRecorder();
        recorder.setAudioSource(MediaRecorder.AudioSource.VOICE_CALL);
        recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
        recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
        recorder.setOutputFile(path+"/TEST00000000011110.M4A");
        if (TelephonyManager.CALL_STATE_RINGING == state) {

        }
        if (TelephonyManager.CALL_STATE_OFFHOOK == state) {
            isPhoneCalling = true;
            try {
                recorder.prepare();
                recorder.start();
            } catch (Exception e) {
            }
        }
        if (TelephonyManager.CALL_STATE_IDLE == state) {
            if (isPhoneCalling) {
                try {
                    recorder.stop();
                    recorder.reset();
                    recorder.release();
                } catch (Exception e) {
                    // TODO: handle exception
                }
                Intent i = getBaseContext().getPackageManager()
                        .getLaunchIntentForPackage(
                                getBaseContext().getPackageName());
                i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                startActivity(i);
                isPhoneCalling = false;
            }
        }
    }
}

解决方案

finally i found a way to fix my problem ! i created a : public void Recorder() in my class and when i want to record audio call it also i created a function for stop recording ! i hope this work for you ! and also this MediaRecorder API works good on android 2.3.3 to 4.3 !

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