Android 我想用mediaplayer录制声音，然后计算；振幅“；用于随着声音的变化上下移动杆

我想用MediaRecorder来记录声音，然后计算随着声音的变化而上下移动条的“振幅”。我还没有找到任何合适的解决方案。有什么建议吗。？？编辑：我现在设法把手伸进了它，问题是我尝试使用处理程序GetMaxAmplium（）来查找振幅，之后我尝试使用该值来显示杆向上移动，但它不起作用，然后我打印了GetMaxAmplium（）的值。当然，该值为零。这里可能有什么问题。？？这是一段代码 公开募捐{ 试一试{

            mRecorder.start();
            while (this.mIsRunning) {
                // creating these variables here so that
                // the mode change can be handled
                double amp = getAmplitude();
                Message msg = mHandle.obtainMessage(MY_MSG, amp);
                mHandle.sendMessage(msg);
            }
        } catch (Exception e) {
            e.printStackTrace();
            Message msg = mHandle.obtainMessage(ERROR_MSG,
                    e.getLocalizedMessage() + "");
            mHandle.sendMessage(msg);
        }
        if (mRecorder != null) {
            mRecorder.stop();
            mRecorder.release();
            mRecorder = null;
        }
    }

    public double getAmplitude() {
        if (mRecorder != null) {
            powerDb = 20 * Math.log10(mRecorder.getMaxAmplitude() / 2700.0);
            return (powerDb);
        }

        else {
            return 1;
        }
    }
public Handler mhandle = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
            case MY_MSG:

                // mSplModeTV.setText(" " + msg.obj);
                if (audioEngineFlag == 1) {
                    String s1 = msg.obj.toString();
                    float f = Float.valueOf(s1.trim()).floatValue();
                    Log.v(TAG, "amplitude=" + f); }

---

您可以使用计时器在每.5秒后调用getMaxAmplitue（）

MyTimer tim = new new MyTimer(30000,500);;
   mRecorder.start();
tim.start();
            while (this.mIsRunning) {
                // creating these variables here so that
                // the mode change can be handled
                double amp = getAmplitude();
                Message msg = mHandle.obtainMessage(MY_MSG, amp);
                mHandle.sendMessage(msg);
            }
        } catch (Exception e) {
            e.printStackTrace();
            Message msg = mHandle.obtainMessage(ERROR_MSG,
                    e.getLocalizedMessage() + "");
            mHandle.sendMessage(msg);
        }
        if (mRecorder != null) {
            mRecorder.stop();
            mRecorder.release();
            mRecorder = null;
        }
    }

    public double getAmplitude() {
        if (mRecorder != null) {
            powerDb = 20 * Math.log10(mRecorder.getMaxAmplitude() / 2700.0);
            return (powerDb);
        }

        else {
            return 1;
        }
    }
public Handler mhandle = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
            case MY_MSG:

                // mSplModeTV.setText(" " + msg.obj);
                if (audioEngineFlag == 1) {
                    String s1 = msg.obj.toString();
                    float f = Float.valueOf(s1.trim()).floatValue();
                    Log.v(TAG, "amplitude=" + f); }


public class MyTimer extends CountDownTimer {
        public MyTimer(long millisInFuture, long countDownInterval) {
            super(millisInFuture, countDownInterval);
            // TODO Auto-generated constructor stub
        }

        @Override
        public void onFinish() {
            // TODO Auto-generated method stub

        }

        @Override
        public void onTick(long millisUntilFinished) {
            int amplitude = mRecorder.getMaxAmplitude();
            Log.i("AMPLITUDE", new Integer(amplitude).toString());
        }
    }

---

您可以在计时器中使用此处理程序在每.5秒后获取结果。

您可以在每.5秒后使用计时器调用getMaxAmplitue（）

MyTimer tim = new new MyTimer(30000,500);;
   mRecorder.start();
tim.start();
            while (this.mIsRunning) {
                // creating these variables here so that
                // the mode change can be handled
                double amp = getAmplitude();
                Message msg = mHandle.obtainMessage(MY_MSG, amp);
                mHandle.sendMessage(msg);
            }
        } catch (Exception e) {
            e.printStackTrace();
            Message msg = mHandle.obtainMessage(ERROR_MSG,
                    e.getLocalizedMessage() + "");
            mHandle.sendMessage(msg);
        }
        if (mRecorder != null) {
            mRecorder.stop();
            mRecorder.release();
            mRecorder = null;
        }
    }

    public double getAmplitude() {
        if (mRecorder != null) {
            powerDb = 20 * Math.log10(mRecorder.getMaxAmplitude() / 2700.0);
            return (powerDb);
        }

        else {
            return 1;
        }
    }
public Handler mhandle = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
            case MY_MSG:

                // mSplModeTV.setText(" " + msg.obj);
                if (audioEngineFlag == 1) {
                    String s1 = msg.obj.toString();
                    float f = Float.valueOf(s1.trim()).floatValue();
                    Log.v(TAG, "amplitude=" + f); }


public class MyTimer extends CountDownTimer {
        public MyTimer(long millisInFuture, long countDownInterval) {
            super(millisInFuture, countDownInterval);
            // TODO Auto-generated constructor stub
        }

        @Override
        public void onFinish() {
            // TODO Auto-generated method stub

        }

        @Override
        public void onTick(long millisUntilFinished) {
            int amplitude = mRecorder.getMaxAmplitude();
            Log.i("AMPLITUDE", new Integer(amplitude).toString());
        }
    }

---

您可以在计时器中使用此处理程序，每.5秒后获取一次结果。

太好了，没有人可以提供帮助。！！！至少让我知道该怎么做。.如果我想调用getMaxAmplitue（）在处理程序中每隔.5秒之后，我如何才能连续读取..太好了，没有人可以帮助..！！！至少让我知道该怎么做..如果我想在处理程序中每隔.5秒调用getMaxAmplitue（），我如何才能连续读取。。？？