.MediaRecorder.getMaxAmplitude() 得到的值一直是0
代码在其它手机上用用这个方法都能拿到音量，在电信的本维5100s上就一直是０，但是微信可以拿到，ＱＱ也可以，像遇见就不行，请问这个问题应该怎么解决
private Context context;
boolean success = false;
private static boolean showCancel;// 显示取消
public XWVoiceRecorder(Context context) {
this.context = context;
init();
}
public void setSavePath(String path) {
MyLog.log("MyVR setSavePath p" + mFileName);
mFileName = path;
}
/**
* 返回当前录音文件保存路径
*
* @return
*/
public String getSavePath() {
MyLog.log("MyVR getSavePath p" + mFileName);
if (mFileName == null)
return null;
// return mFileName;
File file = new File(mFileName);
if (file != null && file.canRead()) {
String fileName1 = mFileName;
if (mFileName.contains("/") && mFileName.lastIndexOf("/") + 1 < mFileName.length()) {
fileName1 = mFileName.substring(mFileName.lastIndexOf("/") + 1, mFileName.length());
} else if (mFileName.lastIndexOf("/") + 1 == mFileName.length()) {
fileName1 = mFileName;
}
MyLog.log("recorde fileName1 =" + fileName1);
String sendNameString = fileName1;
MyLog.log("recorde sendNameString =" + fileName1);
return sendNameString;
} else {
return null;
}
}
/**
* 返回文件路径
*
* @return 路径
*/
public String getRecordFilePath() {
return mFileName;
}
public void setOnFinishedRecordListener(OnFinishedRecordListener listener) {
finishedListener = listener;
}
private String mFileName = null;
private OnFinishedRecordListener finishedListener;
private long startTime;
private Dialog recordIndicator;
private static int[] res = { R.drawable.mic_0, R.drawable.mic_1, R.drawable.mic_2, R.drawable.mic_3, R.drawable.mic_4,
R.drawable.mic_5, R.drawable.mic_6, R.drawable.mic_7, R.drawable.mic_8, R.drawable.mic_too_short };
private static ImageView view;
private MediaRecorder recorder;
private ObtainDecibelThread thread;
private Handler volumeHandler;
private void init() {
volumeHandler = new ShowVolumeHandler();
}
/**
* 显示对话框，并开始录音
*/
public void startRecord(String path) {
if (!hasSDCard()) {
if (context != null) {
Toast.makeText(context, "没有SD卡", 1).show();
}
return;
}
this.mFileName = path;
if (recordIndicator == null) {
recordIndicator = new Dialog(getContext(), R.style.like_toast_dialog_style);
View view2 = LayoutInflater.from(context).inflate(R.layout.radio_mic, null);
recordIndicator.setContentView(view2);
view = (ImageView) view2.findViewById(R.id.radio_image);
view.setImageResource(R.drawable.mic_2);
recordIndicator.setOnDismissListener(onDismiss);
LayoutParams lp = recordIndicator.getWindow().getAttributes();
lp.gravity = Gravity.CENTER;
recordIndicator.setCanceledOnTouchOutside(true);
}
startTime = System.currentTimeMillis();
volumeHandler.removeCallbacks(cancelRecording);
// recordIndicator.dismiss();
startRecording();
}
private Context getContext() {
return context;
}
public void finishRecord() {
if (!hasSDCard()) {
return;
}
stopRecording();
long intervalTime = System.currentTimeMillis() - startTime;
MyLog.log(" time=" + intervalTime / 1000);
if (XWVoicePlayer.getPlayLength(getRecordFilePath()) < 1) {// 太短，则录音取消
success = false;
volumeHandler.sendEmptyMessage(9);
volumeHandler.postDelayed(cancelRecording, 500);
File file = new File(mFileName);
file.delete();
return;
} else {
success = true;
recordIndicator.dismiss();
}
if (finishedListener != null)
finishedListener.onFinishedRecord(mFileName);
if (recordIndicator != null) {
recordIndicator.dismiss();
recordIndicator = null;
}
}
public boolean isSuccess() {
return success;
}
public void cancelRecord() {
try {
if (!hasSDCard()) {
return;
}
stopRecording();
// recordIndicator.dismiss();
// Toast.makeText(getContext(), "取消录音！", Toast.LENGTH_SHORT).show();
if (recordIndicator != null) {
recordIndicator.dismiss();
}
File file = new File(mFileName);
if (file != null && file.exists()) {
file.delete();
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 取消录音，隐藏对话框
*/
private Runnable cancelRecording = new Runnable() {
@Override
public void run() {
if (recordIndicator != null) {
recordIndicator.dismiss();
}
}
};
private void startRecording() {
try {
if (recorder == null) {
recorder = new MediaRecorder();
} else {
recorder.reset();
}
recorder.setMaxDuration(70000);
recorder.setOnErrorListener(new OnErrorListener() {
@Override
public void onError(MediaRecorder mr, int what, int extra) {
Log.i("xpf", " error="+what+" ex="+extra);
}
});
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
Log.i("xpf", "set oudinsorce");
recorder.setOutputFormat(MediaRecorder.OutputFormat.RAW_AMR);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
MyLog.log("MyVR p" + mFileName);
recorder.setOutputFile(mFileName);
if (hasSDCard()) {
recorder.prepare();
}
recorder.start();
thread = new ObtainDecibelThread();
thread.start();
DisShowCancel();
recordIndicator.show();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
private void stopRecording() {
if (thread != null) {
thread.exit();
thread = null;
}
if (recorder != null) {
recorder.stop();
recorder.release();
recorder = null;
}
}
private class ObtainDecibelThread extends Thread {
private volatile boolean running = true;
public void exit() {
running = false;
}
@Override
public void run() {
while (running) {
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
if (recorder == null || !running) {
break;
}
if (!hasSDCard()) {
return;
}
int x = recorder.getMaxAmplitude();
Log.i("xpf", "set getMaxAmplitude");
MyLog.log("ffx=" + x);
if (x != 0) {
int f = (int) (10 * Math.log(x) / Math.log(10)) - 32;
MyLog.log("ff=" + f);
if (f < 0) {
f = -f;
}
if (f == 0) {
volumeHandler.sendEmptyMessage(0);// 安静状态
} else if (f >= 8) {
volumeHandler.sendEmptyMessage(8);// 最大
} else {
volumeHandler.sendEmptyMessage(f);// 按音量
}
}
}
}
}
private OnDismissListener onDismiss = new OnDismissListener() {
@Override
public void onDismiss(DialogInterface dialog) {
stopRecording();
}
};
public static boolean hasSDCard() {
String status = Environment.getExternalStorageState();
if (!status.equals(Environment.MEDIA_MOUNTED)) {
return false;
}
return true;
}
static class ShowVolumeHandler extends Handler {
@Override
public void handleMessage(Message msg) {
MyLog.log("ffs=" + msg.what + " L=" + res.length);
if (msg.what < res.length && !showCancel) {
view.setImageResource(res[msg.what]);
}
}
}
public interface OnFinishedRecordListener {
public void onFinishedRecord(String audioPath);
}
public void showCancel() {
showCancel = true;
view.setImageResource(R.drawable.radio_up_cancel);
}
public void DisShowCancel() {
showCancel = false;
view.setImageResource(R.drawable.mic_0);
}
--------------------编程问答--------------------
然后看了android的源码，得到音量这个方法用的是本地的native 方法。但是我又不会C++，也没有源码不能分析，然后反编了微信的apk，看到他们的录音好你用的是自己写的native方法。如下：
package com.tencent.mm.compatible.audio;
import android.media.MediaRecorder;
import com.tencent.mm.compatible.f.k;
import com.tencent.mm.pointers.PByteArray;
import com.tencent.mm.sdk.platformtools.by;
import com.tencent.mm.sdk.platformtools.y;
public class SimpleMediaRecorder
{
public static final int[] bnp = { 13, 14, 16, 18, 20, 21, 27, 32 };
private static long bnw = 0L;
private static Object bnx = new Object();
private n bnA = null;
private b bnB;
private aa bnC;
private int bnD = 8000;
private int bnE = 0;
private k bnF = new k();
private p bnG = new u(???);
private z bnq;
private int bnr = 0;
private String bns = null;
private v bnt = null;
private long bnu = 0L;
private long bnv = 0L;
private MediaRecorder bny;
private int bnz;
public SimpleMediaRecorder(b paramb)
{
this.bnB = paramb;
if (paramb == b.bmv)
{
this.bnz = 7;
this.bny = new MediaRecorder();
return;
}
this.bnD = 8000;
int i = by.a((Integer)com.tencent.mm.compatible.c.n.gJ().get(102401), 0);
y.aC("MicroMsg.SimpleMediaRecorder", "dk16k sr:" + this.bnD + " notsu:" + i);
if (i == 1)
this.bnD = 8000;
this.bnr = 0;
this.bns = null;
this.bnt = null;
try
{
y.aC("MicroMsg.SimpleMediaRecorder", "!!out mutex :" + bnx.hashCode());
synchronized (bnx)
{
this.bnA = new n(this.bnD, 120, true, 0);
this.bnA.a(this.bnG);
this.bnC = aa.bnV;
this.bnz = 1;
return;
}
}
catch (Exception localException)
{
while (localException.getMessage() != null)
{
y.az("MicroMsg.SimpleMediaRecorder", localException.getMessage());
this.bnC = aa.bnY;
}
y.az("MicroMsg.SimpleMediaRecorder", "Unknown error occured while initializing recording");
}
}
private static native boolean native_init();
private static native boolean native_pcm2amr(int paramInt1, byte[] paramArrayOfByte, int paramInt2, PByteArray paramPByteArray, int paramInt3);
private static native boolean native_pcmresamp(byte[] paramArrayOfByte, int paramInt, PByteArray paramPByteArray);
private static native boolean native_release();
public final void a(z paramz)
{
if (this.bnB == b.bmv)
{
if (this.bny == null)
return;
this.bnq = paramz;
this.bny.setOnErrorListener(new t(this));
this.bnC = aa.bnY;
return;
}
try
{
if (this.bnC != aa.bnV);
this.bnq = paramz;
return;
}
catch (Exception localException)
{
if (localException.getMessage() != null)
{
y.az("MicroMsg.SimpleMediaRecorder", localException.getMessage());
this.bnC = aa.bnY;
return;
}
y.az("MicroMsg.SimpleMediaRecorder", "Unknown error occured while setting output path");
}
}
public final int getMaxAmplitude()
{
if (this.bnB == b.bmv)
if (this.bny == null);
do
{
return 0;
return this.bny.getMaxAmplitude();
}
while (this.bnC != aa.bnX);
int i = this.bnr;
this.bnr = 0;
return i;
}
public final void gq()
{
if (this.bnB == b.bmv)
{
if (this.bny == null)
return;
this.bny.setMaxDuration(3600010);
return;
}
this.bnu = 3600010L;
}
public final void gr()
{
if ((this.bnB != b.bmv) || (this.bny == null))
return;
this.bny.setAudioEncoder(1);
}
public final void gs()
{
if ((this.bnB != b.bmv) || (this.bny == null))
return;
this.bny.setAudioSource(1);
}
public final void gt()
{
if ((this.bnB != b.bmv) || (this.bny == null))
return;
this.bny.setOutputFormat(3);
}
public final boolean gu()
{
if (this.bnB == b.bmv)
{
if (this.bny != null)
{
this.bny.stop();
this.bny.release();
this.bny = null;
}
return true;
}
k localk = new k();
y.aC("MicroMsg.SimpleMediaRecorder", "Stop now state:" + this.bnC);
if (this.bnC != aa.bnX)
{
y.az("MicroMsg.SimpleMediaRecorder", "stop() called on illegal state");
this.bnC = aa.bnY;
return true;
}
synchronized (bnx)
{
if (this.bnA != null)
{
this.bnA.gk();
this.bnA.a(null);
}
long l1 = localk.hk();
this.bnC = aa.bnZ;
long l2 = localk.hk();
this.bnt.gy();
long l3 = by.L(this.bnv);
y.az("MicroMsg.SimpleMediaRecorder", "toNow " + l3 + " sStartTS " + this.bnv + " bufferLen " + bnw);
if ((l3 <= 2000L) || (bnw != 0L))
break label250;
com.tencent.mm.compatible.c.n.gJ().set(102401, Integer.valueOf(1));
y.az("MicroMsg.SimpleMediaRecorder", "16k not suppourt");
label250: y.aC("MicroMsg.SimpleMediaRecorder", "Wait Stop Time Media:" + l1 + " Read:" + l2 + " Thr:" + localk.hk());
return false;
}
}
public final void prepare()
{
if (this.bnB == b.bmv)
{
if (this.bny == null)
return;
this.bny.prepare();
return;
}
if ((this.bnC != aa.bnV) || (this.bns == null))
{
this.bnC = aa.bnY;
release();
return;
}
this.bnC = aa.bnW;
}
public final void release()
{
if (this.bnB == b.bmv)
{
if (this.bny == null)
return;
this.bny.release();
return;
}
if (this.bnC == aa.bnX)
gu();
while (true)
synchronized (bnx)
{
if (this.bnA != null)
{
this.bnA.gk();
this.bnA = null;
}
return;
}
}
public final void setOutputFile(String paramString)
{
if (this.bnB == b.bmv)
{
if (this.bny == null)
return;
this.bny.setOutputFile(paramString);
this.bns = paramString;
return;
}
if (this.bnC == aa.bnV)
{
this.bns = paramString;
return;
}
this.bnC = aa.bnY;
}
public final void start()
{
if (this.bnB == b.bmv)
{
if (this.bny == null)
return;
this.bny.start();
return;
}
y.aC("MicroMsg.SimpleMediaRecorder", "Start now state:" + this.bnC);
if (this.bnC == aa.bnW)
{
this.bnv = System.currentTimeMillis();
bnw = 0L;
this.bnC = aa.bnX;
synchronized (bnx)
{
if (this.bnt == null)
{
this.bnt = new v();
v.a(this.bnt, this.bnz, this.bns);
}
this.bnA.gj();
return;
}
}
com.tencent.mm.compatible.c.n.gJ().set(102401, Integer.valueOf(1));
y.az("MicroMsg.SimpleMediaRecorder", "start() called on illegal state");
this.bnC = aa.bnY;
}
}
--------------------编程问答--------------------
补充：移动开发 , Android
