Fix animations

app/src/main/java/org/schabi/newpipe/util/AnimationUtils.java

@@ -0,0 +1,126 @@
+package org.schabi.newpipe.util;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.util.Log;
+import android.view.View;
+
+import org.schabi.newpipe.player.BasePlayer;
+
+public class AnimationUtils {
+    private static final String TAG = "AnimationUtils";
+    private static final boolean DEBUG = BasePlayer.DEBUG;
+
+    public enum Type {
+        ALPHA, SCALE_AND_ALPHA
+    }
+
+    public static void animateView(View view, boolean enterOrExit, long duration) {
+        animateView(view, Type.ALPHA, enterOrExit, duration, 0, null);
+    }
+
+    public static void animateView(View view, boolean enterOrExit, long duration, long delay) {
+        animateView(view, Type.ALPHA, enterOrExit, duration, delay, null);
+    }
+
+    public static void animateView(View view, boolean enterOrExit, long duration, long delay, Runnable execOnEnd) {
+        animateView(view, Type.ALPHA, enterOrExit, duration, delay, execOnEnd);
+    }
+
+    public static void animateView(View view, Type animationType, boolean enterOrExit, long duration) {
+        animateView(view, animationType, enterOrExit, duration, 0, null);
+    }
+
+    public static void animateView(View view, Type animationType, boolean enterOrExit, long duration, long delay) {
+        animateView(view, animationType, enterOrExit, duration, delay, null);
+    }
+
+    /**
+     * Animate the view
+     *
+     * @param view          view that will be animated
+     * @param animationType {@link Type} of the animation
+     * @param enterOrExit   true to enter, false to exit
+     * @param duration      how long the animation will take, in milliseconds
+     * @param delay         how long the animation will wait to start, in milliseconds
+     * @param execOnEnd     runnable that will be executed when the animation ends
+     */
+    public static void animateView(final View view, Type animationType, boolean enterOrExit, long duration, long delay, Runnable execOnEnd) {
+        if (DEBUG) {
+            Log.d(TAG, "animateView() called with: view = [" + view + "], animationType = [" + animationType + "], enterOrExit = [" + enterOrExit + "], duration = [" + duration + "], delay = [" + delay + "], execOnEnd = [" + execOnEnd + "]");
+        }
+
+        if (view.getVisibility() == View.VISIBLE && enterOrExit) {
+            if (DEBUG) Log.d(TAG, "animateView() view was already visible > view = [" + view + "]");
+            view.animate().setListener(null).cancel();
+            view.setVisibility(View.VISIBLE);
+            view.setAlpha(1f);
+            if (execOnEnd != null) execOnEnd.run();
+            return;
+        } else if ((view.getVisibility() == View.GONE || view.getVisibility() == View.INVISIBLE) && !enterOrExit) {
+            if (DEBUG) Log.d(TAG, "animateView() view was already gone > view = [" + view + "]");
+            view.animate().setListener(null).cancel();
+            view.setVisibility(View.GONE);
+            view.setAlpha(0f);
+            if (execOnEnd != null) execOnEnd.run();
+            return;
+        }
+
+        view.animate().setListener(null).cancel();
+        view.setVisibility(View.VISIBLE);
+
+        switch (animationType) {
+            case ALPHA:
+                animateAlpha(view, enterOrExit, duration, delay, execOnEnd);
+                break;
+            case SCALE_AND_ALPHA:
+                animateScaleAndAlpha(view, enterOrExit, duration, delay, execOnEnd);
+                break;
+        }
+    }
+
+    private static void animateScaleAndAlpha(final View view, boolean enterOrExit, long duration, long delay, final Runnable execOnEnd) {
+        if (enterOrExit) {
+            view.setAlpha(0f);
+            view.setScaleX(.8f);
+            view.setScaleY(.8f);
+            view.animate().alpha(1f).scaleX(1f).scaleY(1f).setDuration(duration).setStartDelay(delay).setListener(new AnimatorListenerAdapter() {
+                @Override
+                public void onAnimationEnd(Animator animation) {
+                    if (execOnEnd != null) execOnEnd.run();
+                }
+            }).start();
+        } else {
+            view.setAlpha(1f);
+            view.setScaleX(1f);
+            view.setScaleY(1f);
+            view.animate().alpha(0f).scaleX(.8f).scaleY(.8f).setDuration(duration).setStartDelay(delay).setListener(new AnimatorListenerAdapter() {
+                @Override
+                public void onAnimationEnd(Animator animation) {
+                    view.setVisibility(View.GONE);
+                    if (execOnEnd != null) execOnEnd.run();
+                }
+            }).start();
+        }
+    }
+
+
+    private static void animateAlpha(final View view, boolean enterOrExit, long duration, long delay, final Runnable execOnEnd) {
+        if (enterOrExit) {
+            view.animate().alpha(1f).setDuration(duration).setStartDelay(delay).setListener(new AnimatorListenerAdapter() {
+                @Override
+                public void onAnimationEnd(Animator animation) {
+                    if (execOnEnd != null) execOnEnd.run();
+                }
+            }).start();
+        } else {
+            view.animate().alpha(0f).setDuration(duration).setStartDelay(delay).setListener(new AnimatorListenerAdapter() {
+                @Override
+                public void onAnimationEnd(Animator animation) {
+                    view.setVisibility(View.GONE);
+                    if (execOnEnd != null) execOnEnd.run();
+                }
+            }).start();
+        }
+    }
+}