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December 12, 2018 19:02
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package org.saintandreas.audiotest; | |
import android.Manifest; | |
import android.app.Activity; | |
import android.content.pm.PackageManager; | |
import android.media.MediaRecorder; | |
import android.opengl.GLES32; | |
import android.opengl.GLSurfaceView; | |
import android.os.Bundle; | |
import android.support.annotation.NonNull; | |
import android.util.Log; | |
import java.io.IOException; | |
import java.util.Timer; | |
import java.util.TimerTask; | |
import javax.microedition.khronos.egl.EGLConfig; | |
import javax.microedition.khronos.opengles.GL10; | |
public class MainActivity extends Activity implements GLSurfaceView.Renderer { | |
private final String TAG = MainActivity.class.getName(); | |
private boolean permissionToRecordAccepted = false; | |
private String [] permissions = {Manifest.permission.RECORD_AUDIO}; | |
private static final int REQUEST_RECORD_AUDIO_PERMISSION = 200; | |
private float maxAudio = 1.0f; | |
private float lastAudio = 0.0f; | |
private GLSurfaceView mGLView; | |
private MediaRecorder mRecorder = null; | |
//private native void nativeOnCreate(); | |
@Override | |
public void onSurfaceCreated(GL10 unused, EGLConfig config) { | |
} | |
@Override | |
public void onDrawFrame(GL10 unused) { | |
float audioLevel = lastAudio / maxAudio; | |
GLES32.glClearColor(audioLevel, audioLevel > 0.2f ? 1.0f :0.0f, 0.0f, 1.0f); | |
GLES32.glClear(GLES32.GL_COLOR_BUFFER_BIT); | |
} | |
@Override | |
public void onSurfaceChanged(GL10 unused, int width, int height) { | |
GLES32.glViewport(0, 0, width, height); | |
} | |
@Override | |
public void onCreate(Bundle savedInstanceState) { | |
System.loadLibrary("audioTest"); | |
super.onCreate(savedInstanceState); | |
requestPermissions(permissions, REQUEST_RECORD_AUDIO_PERMISSION); | |
mGLView = new GLSurfaceView(this); | |
mGLView.setEGLContextClientVersion(3); | |
mGLView.setRenderer(MainActivity.this); | |
setContentView(mGLView); | |
//nativeOnCreate(); | |
} | |
public void monitorAudio() { | |
if (mRecorder != null) { | |
lastAudio = mRecorder.getMaxAmplitude(); | |
maxAudio = Math.max(lastAudio, maxAudio); | |
} | |
} | |
@Override | |
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { | |
super.onRequestPermissionsResult(requestCode, permissions, grantResults); | |
switch (requestCode){ | |
case REQUEST_RECORD_AUDIO_PERMISSION: | |
permissionToRecordAccepted = grantResults[0] == PackageManager.PERMISSION_GRANTED; | |
break; | |
} | |
if (!permissionToRecordAccepted ) { | |
finish(); | |
} else { | |
new Timer().schedule(new TimerTask() { @Override public void run() { startRecording(); }}, 1000); | |
} | |
} | |
Timer mMonitorTimer = null; | |
private void startRecording() { | |
mRecorder = new MediaRecorder(); | |
mRecorder.setAudioSource(MediaRecorder.AudioSource.VOICE_COMMUNICATION); | |
mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); | |
mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); | |
mRecorder.setOutputFile("/dev/null"); | |
try { | |
mRecorder.prepare(); | |
} catch (IOException e) { | |
Log.e(TAG, "prepare() failed"); | |
} | |
mRecorder.start(); | |
mMonitorTimer = new Timer(); | |
mMonitorTimer.scheduleAtFixedRate(new TimerTask() { @Override public void run(){ monitorAudio(); } }, 100, 100); | |
} | |
@Override | |
public void onStop() { | |
super.onStop(); | |
if (mRecorder != null) { | |
mMonitorTimer.cancel(); | |
mMonitorTimer = null; | |
mRecorder.release(); | |
mRecorder = null; | |
} | |
} | |
} | |
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