[Audiowife] How to use proximity sensor and audio manager

[DoM1niC]

http://stackoverflow.com/questions/25881889/how-to-use-proximity-sensor-and-audio-manager-to-reduce-volume-in-android-device

@kriztan & @Tom7353

package com.example.proximitysensordemo;

import java.io.IOException;

import android.app.Activity;
import android.content.Context;
import android.content.res.AssetFileDescriptor;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;

public class SensorActivity extends Activity implements SensorEventListener {
    private SensorManager mSensorManager;
    private Sensor mSensor;
    ImageView iv;
    Button b;
    MediaPlayer player;
    private AudioManager mAudioManager;
    public boolean isHeadsetOn;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_sensor);
    mSensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
    mSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY);
    iv = (ImageView) findViewById(R.id.image);
    b = (Button) findViewById(R.id.audio);
    mAudioManager=(AudioManager)getSystemService(Context.AUDIO_SERVICE);

    b.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            if (player != null && player.isPlaying()) {
                player.pause();
            } else {
                AssetFileDescriptor afd;
                try {
                    if (player == null) {
                        afd = getAssets().openFd("Kraddy Android Porn.mp3");
                        player = new MediaPlayer();
                        player.setDataSource(afd.getFileDescriptor());
                        player.setAudioStreamType(AudioManager.STREAM_MUSIC);
                        player.prepare();
                        player.start();
                    } else {
                        player.start();
                    }

                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }

        }
    });
}

protected void onResume() {
    super.onResume();
    mSensorManager.registerListener(this, mSensor, SensorManager.SENSOR_DELAY_FASTEST);
    mAudioManager.setMode(AudioManager.MODE_IN_CALL);
}

protected void onPause() {
    super.onPause();
    mAudioManager.setMode(AudioManager.MODE_NORMAL);
    try {
        // unregisterReceiver(mReciever);
        mSensorManager.unregisterListener(this);
    } catch (Exception e) {
        e.printStackTrace();
    }
    if (player != null) {
        player.stop();
        player.release();
        player = null;
    }
}

@Override
protected void onStop() {
    // TODO Auto-generated method stub
    super.onStop();
}

public void onAccuracyChanged(Sensor sensor, int accuracy) {
}

public void onSensorChanged(SensorEvent event) {
    Log.e("distance", String.valueOf(event.values[0]));
    Log.e("MaximumRange", String.valueOf(mSensor.getMaximumRange()));

    if (event.values[0] < mSensor.getMaximumRange()) {
        iv.setImageResource(R.drawable.near);
        mAudioManager.setSpeakerphoneOn(false);

    } else {
        iv.setImageResource(R.drawable.far);
        mAudioManager.setSpeakerphoneOn(true);
    }
}

}