安卓媒体记录器启动失败，状态无效 4.

Question

我尝试录制音频，只录制音频，在android 4.1.2上收到此错误，但在4.3上没有：

这是代码：

private void startRecord(){
    on_record = true;
    final boolean exists = (new File(Environment.getExternalStorageDirectory() + File.separator + NOTAY)).exists();
        if (!exists) {new File(Environment.getExternalStorageDirectory() + File.separator + "Test").mkdirs();}
        final boolean existAud = (new File(android.os.Environment.getExternalStorageDirectory() + File.separator + NOTAY + File.separator + "Audio")).exists();
        if (!existAud) {new File(Environment.getExternalStorageDirectory() + File.separator + "Test" + File.separator + "Audio").mkdirs();}
        final EditText editTitle= (EditText) findViewById(R.id.editTitle);
        final String title = editTitle.getText().toString();
        final String audioName = getDate(System.currentTimeMillis()).replaceAll(" ", "_");
        currentAudioPath =    Environment.getExternalStorageDirectory().getAbsolutePath()
                            + File.separator
                            + "Test"
                            + File.separator
                            + "Audio"
                            + File.separator
                            + System.currentTimeMillis() + "-" + audioName + ".3gpp";
        if(title.length() == 0)
            editTitle.setText(audioName);
        Recorder = new MediaRecorder();
        Recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
        Recorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
        Recorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
        Recorder.setOutputFile(currentAudioPath);

        try {
            Recorder.prepare();
        } catch (IOException e) {
        }
        Recorder.start();
    }
    private void saveRecord(){
        Recorder.stop();
        Recorder.release();
        Recorder = null;
        on_record = false;
        currentAudioPath = NO_AUDIO;
    }

这里是日志：

10-24 08:34:02.777: E/MediaRecorder(13491): start called in an invalid state: 4
10-24 08:34:02.777: D/AndroidRuntime(13491): Shutting down VM
10-24 08:34:02.777: W/dalvikvm(13491): threadid=1: thread exiting with uncaught exception (group=0x40e5b440)
10-24 08:34:02.823: E/AndroidRuntime(13491): FATAL EXCEPTION: main
10-24 08:34:02.823: E/AndroidRuntime(13491): java.lang.IllegalStateException
10-24 08:34:02.823: E/AndroidRuntime(13491):    at android.media.MediaRecorder.start(Native Method)
10-24 08:34:02.823: E/AndroidRuntime(13491):    at com.androtest.audio.startRecord(AudioActivity.java:357)
10-24 08:34:02.823: E/AndroidRuntime(13491):    at com.androtest.audio.onOptionsItemSelected(AudioActivity.java:307)
10-24 08:34:02.823: E/AndroidRuntime(13491):    at android.app.Activity.onMenuItemSelected(Activity.java)
10-24 08:34:02.823: E/AndroidRuntime(13491):    at com.android.internal.policy.impl.PhoneWindow.onMenuItemSelected(PhoneWindow.java)
10-24 08:34:02.823: E/AndroidRuntime(13491):    at com.android.internal.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java)
10-24 08:34:02.823: E/AndroidRuntime(13491):    at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java)
10-24 08:34:02.823: E/AndroidRuntime(13491):    at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java)
10-24 08:34:02.823: E/AndroidRuntime(13491):    at com.android.internal.view.menu.ActionMenuView.invokeItem(ActionMenuView.java)
10-24 08:34:02.823: E/AndroidRuntime(13491):    at com.android.internal.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java)
10-24 08:34:02.823: E/AndroidRuntime(13491):    at android.view.View.performClick(View.java)
10-24 08:34:02.823: E/AndroidRuntime(13491):    at android.view.View$PerformClick.run(View.java)
10-24 08:34:02.823: E/AndroidRuntime(13491):    at android.os.Handler.handleCallback(Handler.java)
10-24 08:34:02.823: E/AndroidRuntime(13491):    at android.os.Handler.dispatchMessage(Handler.java)
10-24 08:34:02.823: E/AndroidRuntime(13491):    at android.os.Looper.loop(Looper.java)
10-24 08:34:02.823: E/AndroidRuntime(13491):    at android.app.ActivityThread.main(ActivityThread.java)
10-24 08:34:02.823: E/AndroidRuntime(13491):    at java.lang.reflect.Method.invokeNative(Native Method)
10-24 08:34:02.823: E/AndroidRuntime(13491):    at java.lang.reflect.Method.invoke(Method.java:511)
10-24 08:34:02.823: E/AndroidRuntime(13491):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java)
10-24 08:34:02.823: E/AndroidRuntime(13491):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java)
10-24 08:34:02.823: E/AndroidRuntime(13491):    at dalvik.system.NativeStart.main(Native Method)

我已经阅读了数百个关于此错误的线程，但我找不到任何可以解决我的问题的东西......

Answer 1

我遇到了同样的错误，并通过修复文件的路径来解决它。因此，如果您的状态 4 无效，请检查是否设置了输出文件路径以及它是否确实存在。

Answer 2

好的，

我找出我的问题是什么。这：

final String audioName = getDate(System.currentTimeMillis()).replaceAll(" ", "_");

返回包含以下字符的字符串："："将其替换为：

final String audioName = (getDate(System.currentTimeMillis()).replaceAll(" ", "_")).replaceAll(":", "-");

解决了我的问题。

Answer 3

初始化

录音机后需要调用重置

     Recorder = new MediaRecorder();
            Recorder.reset();
            Recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
            Recorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
            Recorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
            Recorder
.setOutputFile(currentAudioPath);

        try {
            Recorder.prepare();
        } catch (IOException e) {
        }
        Recorder.start();

Answer 4

我遇到了同样的问题，然后意识到输出文件的路径不正确。 更正路径解决了我的问题。