我有android G1固件1.6，我试图用以下代码从应用程序录制语音。
MediaRecorder recorder = new MediaRecorder(); recorder.setAudioSource(MediaRecorder.AudioSource.MIC); recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); recorder.setOutputFile(PATH_NAME); recorder.prepare(); recorder.start();
我的manifest.xml有：
<uses-permission android:name="android.permission.RECORD_AUDIO" />
我有：
09-23 14:41:05.531: ERROR/AndroidRuntime(1718): Uncaught handler: thread main exiting due to uncaught exception 09-23 14:41:05.551: ERROR/AndroidRuntime(1718): java.lang.RuntimeException: setAudioSource failed. 09-23 14:41:05.551: ERROR/AndroidRuntime(1718): at android.media.MediaRecorder.setAudioSource(Native Method)
我该如何正确录制声音？
打开“AndroidManifest.xml” - >
加
<uses-permission android:name="android.permission.RECORD_AUDIO" />
这段代码对我有用
mRecorder = new MediaRecorder();
mRecorder.reset();
mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
作为Cyanogenmod用户，我不得不这样做
Settings下设置了权限 - > Apps - >选择你的应用程序 - > Permissions - >检查所有权限（应该是清单请求的权限）（在设备上）之后，重新编码对我有用。
尝试这个代码它可以帮助你很多，它可以理解.....
public class MainActivity extends Activity {
MediaRecorder mRecorder;
MediaPlayer mediaPlayer;
Button start, stop, play,stop_play;
String FileName="";
File outfile ;
public static final int request_code = 1000;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
start=(Button)findViewById(R.id.btn_start_main);
stop=(Button)findViewById(R.id.btn_stop_main);
play=(Button)findViewById(R.id.btn_play_main);
stop_play=(Button)findViewById(R.id.btn_playstop_main);
if (checkPermissionFromDevice()){
start.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
FileName= Environment.getExternalStorageDirectory().getAbsolutePath()+"/"+
UUID.randomUUID()+"AudioFile.3gp";
SetupMediaRecorder();
try {
mRecorder.prepare();
mRecorder.start();
} catch (IOException e) {
e.printStackTrace();
}
start.setEnabled(false);
stop.setEnabled(true);
play.setEnabled(false);
stop_play.setEnabled(false);
Toast.makeText(getApplicationContext(),"recording....",Toast.LENGTH_SHORT).show();
}
});
stop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mRecorder.stop();
play.setEnabled(true);
start.setEnabled(true);
stop.setEnabled(false);
stop_play.setEnabled(false);
Toast.makeText(getApplicationContext(),"recording stoped....",Toast.LENGTH_SHORT).show();
}
});
play.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mediaPlayer=new MediaPlayer();
try {
mediaPlayer.setDataSource(FileName);
mediaPlayer.prepare();
} catch (IOException e) {
e.printStackTrace();
}
mediaPlayer.start();
start.setEnabled(false);
stop.setEnabled(false);
play.setEnabled(false);
stop_play.setEnabled(true);
Toast.makeText(getApplicationContext(),"playing..",Toast.LENGTH_SHORT).show();
}
});
stop_play.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mediaPlayer.stop();
SetupMediaRecorder();
start.setEnabled(true);
stop_play.setEnabled(false);
play.setEnabled(false);
}
});
}
else {
requestPermissionFromDevice();
}
}
private void SetupMediaRecorder() {
mRecorder=new MediaRecorder();
mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
mRecorder.setOutputFile(FileName);
}
private void requestPermissionFromDevice() {
ActivityCompat.requestPermissions(this,new String[]{
Manifest.permission.WRITE_EXTERNAL_STORAGE,
Manifest.permission.RECORD_AUDIO},
request_code);
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch (requestCode){
case request_code:
{
if (grantResults.length>0 && grantResults[0] == PackageManager.PERMISSION_GRANTED ){
Toast.makeText(getApplicationContext(),"permission granted...",Toast.LENGTH_SHORT).show();
}
else {
Toast.makeText(getApplicationContext(),"permission denied...",Toast.LENGTH_SHORT).show();
}
}
break;
}
}
private boolean checkPermissionFromDevice() {
int storage_permission= ContextCompat.checkSelfPermission(this,Manifest.permission.WRITE_EXTERNAL_STORAGE);
int recorder_permssion=ContextCompat.checkSelfPermission(this,Manifest.permission.RECORD_AUDIO);
return storage_permission == PackageManager.PERMISSION_GRANTED && recorder_permssion == PackageManager.PERMISSION_GRANTED;
}
}
我把它移到另一个线程。一切正常。
这是一个代码：
new Thread(() -> {
mediaRecorder.reset();
mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
mediaRecorder.setOutputFile("/audiorecordtest.3gp");
mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
try {
mediaRecorder.prepare();
mediaRecorder.start();
//do something here
mediaRecorder.stop();
} catch (IOException e) {
e.printStackTrace();
Log.d("Audio","unable to prepare");
}
}).start();
我的建议可能看起来很愚蠢，但它对我有用:)
尝试将权限作为嵌套标记。我相信在android包装库的某处有一个xml解析问题。
确保android系统已在设备上设置了权限，应该是清单请求的权限：
更改
<uses-permission android:name="android.permission.RECORD_AUDIO" />
至
<uses-permission android:name="android.permission.RECORD_AUDIO" ></uses-permission>
为我工作。
我知道这是一个非常古老的问题但是在Android Marshmallow中你必须继续“设置>应用程序>你的应用程序>权限”并获得麦克风权限。
如果您在Android M上运行，则需要在首次运行时请求记录音频的权限。要完成此操作，请询问用户是否可以在应用程序启动时录制音频：
private static final int MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE = 29;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (mContext.checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.RECORD_AUDIO},
MY_PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE);
} else {
Log.d("Home", "Already granted access");
initializeView(v);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String permissions[], @NonNull int[] grantResults) {
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_WRITE_EXTERNAL_STORAGE: {
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Log.d("Home", "Permission Granted");
initializeView(v);
} else {
Log.d("Home", "Permission Failed");
Toast.makeText(getActivity().getBaseContext(), "You must allow permission record audio to your mobile device.", Toast.LENGTH_SHORT).show();
getActivity().finish();
}
}
// Add additional cases for other permissions you may have asked for
}
}
重要 - 在过去的几个小时里，我试图弄清楚如何检查MIC是否被其他应用程序捕获。我注意到，如果2个应用程序地址同时向MediaRecorder抛出RuntimeException并且你将无法使用麦克风，除非你重启你的设备（!!）我不知道它是否是最好的解决方案但是它对我有用。也许它会让你们有些人在某一天节省一些时间..
private void validateMicAvailability() throws MicUnaccessibleException {
AudioRecord recorder =
new AudioRecord(AudioSource.MIC, 44100,
AudioFormat.CHANNEL_IN_MONO,
AudioFormat.ENCODING_DEFAULT, 44100);
try{
if(recorder.getRecordingState() != AudioRecord.RECORDSTATE_STOPPED ){
throw new MicUnaccessibleException("Mic didn't successfully initialized");
}
recorder.startRecording();
if(recorder.getRecordingState() != AudioRecord.RECORDSTATE_RECORDING){
recorder.stop();
throw new MicUnaccessibleException("Mic is in use and can't be accessed");
}
recorder.stop();
} finally{
recorder.release();
recorder = null;
}
}
我有这个确切的问题，这解决了我：
在用于调试的设备上，转到设置 - >应用程序 - > {您的应用程序}。然后确保允许所有应用程序的权限（在本例中为音频录制和写入外部存储）。
显然，在不通过Google Play商店安装应用时，系统不会要求您授予权限，在某些手机上，这会导致您的调试应用无法获得某些权限。
即使清单文件中的某些权限被识别（例如互联网访问），也要检查这一点，因为对我来说有些工作有些，而有些则被自动阻止。
希望这可以帮助。
对于API 23+，您需要请求读/写权限，即使它们已经在您的清单中。
// Check for permissions
int permission = ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.WRITE_EXTERNAL_STORAGE);
// If we don't have permissions, ask user for permissions
if (permission != PackageManager.PERMISSION_GRANTED) {
String[] PERMISSIONS_STORAGE = {
android.Manifest.permission.READ_EXTERNAL_STORAGE,
android.Manifest.permission.WRITE_EXTERNAL_STORAGE
};
int REQUEST_EXTERNAL_STORAGE = 1;
ActivityCompat.requestPermissions(
getActivity(),
PERMISSIONS_STORAGE,
REQUEST_EXTERNAL_STORAGE
);
}
对于API 23+，请检查Manifest.xml <uses-permission android:name="android.permission.RECORD_AUDIO" />和Java Code中的音频记录权限
if (ActivityCompat.checkSelfPermission(cnt, Manifest.permission.RECORD_AUDIO)
!= PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(cnt, arrayOf(
Manifest.permission.RECORD_AUDIO
),0)
return
}
请为Marshmallow及以上版本动态请求Manifest.permission.RECORD_AUDIO权限。
这看起来很正确。确保其他应用程序尚未使用MIC。也许让手机重启并再试一次。