com.newventuresoftware.waveformdemo.MainActivity.java Source code

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Here is the source code for com.newventuresoftware.waveformdemo.MainActivity.java

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/*
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.newventuresoftware.waveformdemo;

import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;

import com.newventuresoftware.waveform.WaveformView;

import org.apache.commons.io.IOUtils;

import java.io.IOException;
import java.io.InputStream;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.ShortBuffer;

public class MainActivity extends AppCompatActivity {

    private WaveformView mRealtimeWaveformView;
    private RecordingThread mRecordingThread;
    private PlaybackThread mPlaybackThread;
    private static final int REQUEST_RECORD_AUDIO = 13;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        mRealtimeWaveformView = (WaveformView) findViewById(R.id.waveformView);
        mRecordingThread = new RecordingThread(new AudioDataReceivedListener() {
            @Override
            public void onAudioDataReceived(short[] data) {
                mRealtimeWaveformView.setSamples(data);
            }
        });

        final WaveformView mPlaybackView = (WaveformView) findViewById(R.id.playbackWaveformView);

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (!mRecordingThread.recording()) {
                    startAudioRecordingSafe();
                } else {
                    mRecordingThread.stopRecording();
                }
            }
        });

        short[] samples = null;
        try {
            samples = getAudioSample();
        } catch (IOException e) {
            e.printStackTrace();
        }

        if (samples != null) {
            final FloatingActionButton playFab = (FloatingActionButton) findViewById(R.id.playFab);

            mPlaybackThread = new PlaybackThread(samples, new PlaybackListener() {
                @Override
                public void onProgress(int progress) {
                    mPlaybackView.setMarkerPosition(progress);
                }

                @Override
                public void onCompletion() {
                    mPlaybackView.setMarkerPosition(mPlaybackView.getAudioLength());
                    playFab.setImageResource(android.R.drawable.ic_media_play);
                }
            });
            mPlaybackView.setChannels(1);
            mPlaybackView.setSampleRate(PlaybackThread.SAMPLE_RATE);
            mPlaybackView.setSamples(samples);

            playFab.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (!mPlaybackThread.playing()) {
                        mPlaybackThread.startPlayback();
                        playFab.setImageResource(android.R.drawable.ic_media_pause);
                    } else {
                        mPlaybackThread.stopPlayback();
                        playFab.setImageResource(android.R.drawable.ic_media_play);
                    }
                }
            });
        }
    }

    @Override
    protected void onStop() {
        super.onStop();

        mRecordingThread.stopRecording();
        mPlaybackThread.stopPlayback();
    }

    private short[] getAudioSample() throws IOException {
        InputStream is = getResources().openRawResource(R.raw.jinglebells);
        byte[] data;
        try {
            data = IOUtils.toByteArray(is);
        } finally {
            if (is != null) {
                is.close();
            }
        }

        ShortBuffer sb = ByteBuffer.wrap(data).order(ByteOrder.LITTLE_ENDIAN).asShortBuffer();
        short[] samples = new short[sb.limit()];
        sb.get(samples);
        return samples;
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    private void startAudioRecordingSafe() {
        if (ContextCompat.checkSelfPermission(this,
                android.Manifest.permission.RECORD_AUDIO) == PackageManager.PERMISSION_GRANTED) {
            mRecordingThread.startRecording();
        } else {
            requestMicrophonePermission();
        }
    }

    private void requestMicrophonePermission() {
        if (ActivityCompat.shouldShowRequestPermissionRationale(this, android.Manifest.permission.RECORD_AUDIO)) {
            // Show dialog explaining why we need record audio
            Snackbar.make(mRealtimeWaveformView, "Microphone access is required in order to record audio",
                    Snackbar.LENGTH_INDEFINITE).setAction("OK", new View.OnClickListener() {
                        @Override
                        public void onClick(View v) {
                            ActivityCompat.requestPermissions(MainActivity.this,
                                    new String[] { android.Manifest.permission.RECORD_AUDIO },
                                    REQUEST_RECORD_AUDIO);
                        }
                    }).show();
        } else {
            ActivityCompat.requestPermissions(MainActivity.this,
                    new String[] { android.Manifest.permission.RECORD_AUDIO }, REQUEST_RECORD_AUDIO);
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
            @NonNull int[] grantResults) {
        if (requestCode == REQUEST_RECORD_AUDIO && grantResults.length > 0
                && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
            mRecordingThread.stopRecording();
        }
    }
}