First song played: What she said - The Smiths

app/src/main/java/com/cappielloantonio/play/helper/MusicProgressViewUpdateHelper.java

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+package com.cappielloantonio.play.helper;
+
+import android.os.Handler;
+import android.os.Message;
+
+import androidx.annotation.NonNull;
+
+public class MusicProgressViewUpdateHelper extends Handler {
+    private static final int CMD_REFRESH_PROGRESS_VIEWS = 1;
+
+    private static final int MIN_INTERVAL = 20;
+    private static final int UPDATE_INTERVAL_PLAYING = 1000;
+    private static final int UPDATE_INTERVAL_PAUSED = 500;
+
+    private Callback callback;
+    private int intervalPlaying;
+    private int intervalPaused;
+
+    public void start() {
+        queueNextRefresh(1);
+    }
+
+    public void stop() {
+        removeMessages(CMD_REFRESH_PROGRESS_VIEWS);
+    }
+
+    public MusicProgressViewUpdateHelper(Callback callback) {
+        this.callback = callback;
+        this.intervalPlaying = UPDATE_INTERVAL_PLAYING;
+        this.intervalPaused = UPDATE_INTERVAL_PAUSED;
+    }
+
+    @Override
+    public void handleMessage(@NonNull Message msg) {
+        super.handleMessage(msg);
+        if (msg.what == CMD_REFRESH_PROGRESS_VIEWS) {
+            queueNextRefresh(refreshProgressViews());
+        }
+    }
+
+    private int refreshProgressViews() {
+        final int progressMillis = MusicPlayerRemote.getSongProgressMillis();
+        final int totalMillis = MusicPlayerRemote.getSongDurationMillis();
+
+        callback.onUpdateProgressViews(progressMillis, totalMillis);
+
+        if (!MusicPlayerRemote.isPlaying()) {
+            return intervalPaused;
+        }
+
+        final int remainingMillis = intervalPlaying - progressMillis % intervalPlaying;
+
+        return Math.max(MIN_INTERVAL, remainingMillis);
+    }
+
+    private void queueNextRefresh(final long delay) {
+        final Message message = obtainMessage(CMD_REFRESH_PROGRESS_VIEWS);
+        removeMessages(CMD_REFRESH_PROGRESS_VIEWS);
+        sendMessageDelayed(message, delay);
+    }
+
+    public interface Callback {
+        void onUpdateProgressViews(int progress, int total);
+    }
+}