audio-waveform (for Android)

---

##What #####Show audio file's waveform, not spectrum. #####This lib based on ringdroid, but only contains WaveformView and related classes.
##How

• Add this to your build.gradle
  compile 'com.github.derlio.waveform:library:1.0.3@aar'
• Use SimpleWaveformView in your layout
  

        <com.github.derlio.waveform.SimpleWaveformView
            android:id="@+id/waveform"
            android:layout_width="match_parent"
            android:layout_height="144dp"
            app:waveformColor="#fb6155"
            app:indicatorColor="@android:color/holo_green_dark"
        />

app:waveformColor is the waveform line's color, app:indicatorColor is the current playing indicator's color.

• Then get it from Activity, and prepare your audio file

final File file = new File(dir, "qudali.mp3");
final SoundFile soundFile = SoundFile.create(file.getPath(), new SoundFile.ProgressListener() {

                        int lastProgress = 0;

                        @Override
                        public boolean reportProgress(double fractionComplete) {
                            final int progress = (int) (fractionComplete * 100);
                            if (lastProgress == progress) {
                                return true;
                            }
                            lastProgress = progress;
                            Log.i(TAG, "LOAD FILE PROGRESS:" + progress);
                            
                            return true;
                        }
                    });

Make sure below codes should not be in the Main Thread. User SoundFile.ProgressListener to get file load progress, param fractionComplete is from 0.0 to 1.0, and return true means to continue decode, return false will abort the decode.

• Then use

mWaveformView.setAudioFile(soundFile);
mWaveformView.invalidate();

to set the audio file to WaveformView. It does work.

• If you want to show current playing indicator, just implements SimpleWaveformView.WaveformListener, use below codes in onWaveformDraw.

int now = mPlayer.getCurrentPosition();
mWaveformView.setPlaybackPosition(now);

This library is just satisfied my current situation. It has much more works to do. Hope you can help me~