android手机 录音权限是否打开的检测
6.0之前的权限检测只是检测到是否在清单文件中注册
boolean flag = (PackageManager.PERMISSION_GRANTED ==
pm.checkPermission("android.permission.RECORD_AUDIO", "包名"));
boolean flag = PermissionChecker.checkSelfPermission(this, Manifest.permission.)== PermissionChecker.PERMISSION_GRANTED;
if (flag){
ToastUtil.showMessage("有权限");
}else {
ToastUtil.showMessage("无权限");
return;
}
在6.0系统一下 无论是关闭或者打开app的录音权限都能获取到权限，6.0以上则正常，后来发现是6.0以后google加强了权限管理
public class CheckPermissionUtils {
/**
*获取app的录音权限是否打开
*android 6.0version以上 传统方法不适合 以此兼容
* @param context
*/
public static boolean isHasAudioRecordPermission(Context context) {
// 音频获取源
int audioSource = MediaRecorder.AudioSource.MIC;
// 设置音频采样率，44100是目前的标准，但是某些设备仍然支持22050，16000，11025
int sampleRateInHz = 44100;
// 设置音频的录制的声道CHANNEL_IN_STEREO为双声道，CHANNEL_CONFIGURATION_MONO为单声道
int channelConfig = AudioFormat.CHANNEL_IN_STEREO;
// 音频数据格式:PCM 16位每个样本。保证设备支持。PCM 8位每个样本。不一定能得到设备支持。
int audioFormat = AudioFormat.ENCODING_PCM_16BIT;
// 缓冲区字节大小
int bufferSizeInBytes = 0;
bufferSizeInBytes = AudioRecord.getMinBufferSize(sampleRateInHz,
channelConfig, audioFormat);
AudioRecord audioRecord = new AudioRecord(audioSource, sampleRateInHz,
channelConfig, audioFormat, bufferSizeInBytes);
//开始录制音频
try{
// 防止某些手机崩溃，例如联想
audioRecord.startRecording();
}catch (IllegalStateException e){
e.printStackTrace();
}
/**
* 根据开始录音判断是否有录音权限
*/
if (audioRecord.getRecordingState() != AudioRecord.RECORDSTATE_RECORDING) {
return false;
}
audioRecord.stop();
audioRecord.release();
audioRecord = null;
return true;
}
}
最后一种，测试没问题。
public class CheckPermissionUtils {
private static final String TAG = "CheckPermissionUtils";
private static CheckPermissionUtils checkPermissionUtils = new CheckPermissionUtils();
static final int SAMPLE_RATE_IN_HZ = 44100;
static final int BUFFER_SIZE = AudioRecord.getMinBufferSize(
SAMPLE_RATE_IN_HZ, AudioFormat.CHANNEL_IN_DEFAULT,
AudioFormat.ENCODING_PCM_16BIT);
private AudioRecord mAudioRecord;
boolean isGetVoiceRun;
private Object mLock;
private int count=0;
private boolean isHasPermission;
private CheckPermissionUtils() {
mLock = new Object();
}
public static CheckPermissionUtils getinstance() {
if (checkPermissionUtils == null) {
checkPermissionUtils = new CheckPermissionUtils();
}
return checkPermissionUtils;
}
public boolean isHasAudioRecordingPermission(Context context) {
isHasPermission=false;
count=0;
mAudioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC,
SAMPLE_RATE_IN_HZ, AudioFormat.CHANNEL_IN_DEFAULT,
AudioFormat.ENCODING_PCM_16BIT, BUFFER_SIZE);
if (mAudioRecord == null) {
Log.e("sound", "mAudioRecord初始化失败");
}
isGetVoiceRun = true;
try {
// new Thread(new Runnable() {
// @Override
// public void run() {
mAudioRecord.startRecording();
short[] buffer = new short[BUFFER_SIZE];
while (isGetVoiceRun) {
count++;
if (count++>10) {
isGetVoiceRun=false;
}
//r是实际读取的数据长度，一般而言r会小于buffersize
int r = mAudioRecord.read(buffer, 0, BUFFER_SIZE);
long v = 0;
// 将 buffer 内容取出，进行平方和运算
for (int i = 0; i < buffer.length; i++) {
v += buffer[i] * buffer[i];
}
// 平方和除以数据总长度，得到音量大小。
double mean = v / (double) r;
double volume = 10 * Math.log10(mean);
Log.d(TAG, "-------分贝值:" +volume+"----v"+v+"------r"+r );
if (v>0&&r>0) {
//有录音
isHasPermission=true;
return isHasPermission;
}
// 大概一秒十次
synchronized (mLock) {
try {
mLock.wait(5);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
mAudioRecord.stop();
mAudioRecord.release();
mAudioRecord = null;
// }
//}).start();
} catch (Exception e) {
}
return isHasPermission;
}
｝