Fix bottom nav sometimes not hide correctly

Replace homemade animation with StateListAnimator
2025-09-06 06:36:58 +00:00 · 2022-01-17 18:13:25 +08:00
parent ff8f3e766e
commit bfe6bc3095
4 changed files with 149 additions and 42 deletions
@@ -0,0 +1,136 @@
+package com.topjohnwu.magisk.widget;
+
+import android.animation.Animator;
+import android.animation.ObjectAnimator;
+import android.animation.StateListAnimator;
+import android.content.Context;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.util.AttributeSet;
+import android.view.View;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.interpolator.view.animation.FastOutLinearInInterpolator;
+
+import com.google.android.material.bottomnavigation.BottomNavigationView;
+import com.topjohnwu.magisk.R;
+
+public class ConcealableBottomNavigationView extends BottomNavigationView {
+
+    private static final int[] STATE_SET = {
+            R.attr.state_hidden
+    };
+
+    private boolean isHidden;
+
+    public ConcealableBottomNavigationView(@NonNull Context context) {
+        this(context, null);
+    }
+
+    public ConcealableBottomNavigationView(@NonNull Context context, @Nullable AttributeSet attrs) {
+        this(context, attrs, R.attr.bottomNavigationStyle);
+    }
+
+    public ConcealableBottomNavigationView(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
+        this(context, attrs, defStyleAttr, R.style.Widget_Design_BottomNavigationView);
+    }
+
+    public ConcealableBottomNavigationView(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+
+    private void recreateAnimator(int height) {
+        Animator toHidden = ObjectAnimator.ofFloat(this, "translationY", height);
+        toHidden.setDuration(175);
+        toHidden.setInterpolator(new FastOutLinearInInterpolator());
+        Animator toUnhidden = ObjectAnimator.ofFloat(this, "translationY", 0);
+        toHidden.setDuration(225);
+        toHidden.setInterpolator(new FastOutLinearInInterpolator());
+
+        StateListAnimator animator = new StateListAnimator();
+
+        animator.addState(STATE_SET, toHidden);
+        animator.addState(new int[]{}, toUnhidden);
+
+        setStateListAnimator(animator);
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+
+        recreateAnimator(getMeasuredHeight());
+    }
+
+    @Override
+    protected int[] onCreateDrawableState(int extraSpace) {
+        final int[] drawableState = super.onCreateDrawableState(extraSpace + 1);
+        if (isHidden()) {
+            mergeDrawableStates(drawableState, STATE_SET);
+        }
+        return drawableState;
+    }
+
+    public boolean isHidden() {
+        return isHidden;
+    }
+
+    public void setHidden(boolean raised) {
+        if (isHidden != raised) {
+            isHidden = raised;
+            refreshDrawableState();
+        }
+    }
+
+    @NonNull
+    @Override
+    protected Parcelable onSaveInstanceState() {
+        SavedState state = new SavedState(super.onSaveInstanceState());
+        state.isHidden = isHidden();
+        return state;
+    }
+
+    @Override
+    protected void onRestoreInstanceState(Parcelable state) {
+        final SavedState ss = (SavedState) state;
+        super.onRestoreInstanceState(ss.getSuperState());
+
+        if (ss.isHidden) {
+            setHidden(isHidden);
+        }
+    }
+
+    static class SavedState extends View.BaseSavedState {
+
+        public boolean isHidden;
+
+        public SavedState(Parcel source) {
+            super(source);
+            isHidden = source.readByte() != 0;
+        }
+
+        public SavedState(Parcelable superState) {
+            super(superState);
+        }
+
+        @Override
+        public void writeToParcel(Parcel out, int flags) {
+            super.writeToParcel(out, flags);
+            out.writeByte(isHidden ? (byte) 1 : (byte) 0);
+        }
+
+        public static final Creator<SavedState> CREATOR = new Creator<SavedState>() {
+
+            @Override
+            public SavedState createFromParcel(Parcel source) {
+                return new SavedState(source);
+            }
+
+            @Override
+            public SavedState[] newArray(int size) {
+                return new SavedState[size];
+            }
+        };
+    }
+}