Some improvements

floatinghintedittext/src/main/java/com/thebnich/floatinghintedittext/FloatingHintEditText.java

@@ -2,10 +2,13 @@
 
 import android.content.Context;
 import android.content.res.ColorStateList;
+import android.content.res.TypedArray;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Paint;
 import android.graphics.Paint.FontMetricsInt;
+import android.os.Bundle;
+import android.os.Parcelable;
 import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.util.TypedValue;
@@ -14,13 +17,21 @@
 public class FloatingHintEditText extends EditText {
     private static enum Animation { NONE, SHRINK, GROW }
 
+    public static final String ARG_SUPER_STATE = "arg_super_state";
+    public static final String ARG_TEXT_CHANGED_STATE= "arg_text_changed_state";
+
+    private static final int DEFAULT_DIVIDE_PADDING = 5;
+    private static final int DEFAULT_ANIMATION_STEPS = 6;
+    private static final float DEFAULT_HINT_SCALE = 0.6f;
+
     private final Paint mFloatingHintPaint = new Paint();
     private final ColorStateList mHintColors;
     private final float mHintScale;
     private final int mAnimationSteps;
 
     private boolean mWasEmpty;
     private int mAnimationFrame;
+    private int mLabelPadding;
     private Animation mAnimation = Animation.NONE;
 
     public FloatingHintEditText(Context context) {
@@ -34,10 +45,16 @@ public FloatingHintEditText(Context context, AttributeSet attrs) {
     public FloatingHintEditText(Context context, AttributeSet attrs, int defStyle) {
         super(context, attrs, defStyle);
 
-        TypedValue typedValue = new TypedValue();
-        getResources().getValue(R.dimen.floatinghintedittext_hint_scale, typedValue, true);
-        mHintScale = typedValue.getFloat();
-        mAnimationSteps = getResources().getInteger(R.dimen.floatinghintedittext_animation_steps);
+        int defaultLabelPadding = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, DEFAULT_DIVIDE_PADDING, getResources().getDisplayMetrics());
+
+        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.FloatLabelView);
+        try {
+            mLabelPadding = a.getDimensionPixelOffset(R.styleable.FloatLabelView_dividePadding, defaultLabelPadding);
+            mAnimationSteps = a.getInt(R.styleable.FloatLabelView_animationSteps, DEFAULT_ANIMATION_STEPS);
+            mHintScale = a.getFloat(R.styleable.FloatLabelView_hintScale, DEFAULT_HINT_SCALE);
+        } finally {
+            a.recycle();
+        }
 
         mHintColors = getHintTextColors();
         mWasEmpty = TextUtils.isEmpty(getText());
@@ -46,7 +63,7 @@ public FloatingHintEditText(Context context, AttributeSet attrs, int defStyle) {
     @Override
     public int getCompoundPaddingTop() {
         final FontMetricsInt metrics = getPaint().getFontMetricsInt();
-        final int floatingHintHeight = (int) ((metrics.bottom - metrics.top) * mHintScale);
+        final int floatingHintHeight = (int) ((metrics.bottom - metrics.top) * mHintScale) + mLabelPadding;
         return super.getCompoundPaddingTop() + floatingHintHeight;
     }
 
@@ -97,7 +114,7 @@ protected void onDraw(Canvas canvas) {
 
         final float hintPosX = getCompoundPaddingLeft() + getScrollX();
         final float normalHintPosY = getBaseline();
-        final float floatingHintPosY = normalHintPosY + getPaint().getFontMetricsInt().top + getScrollY();
+        final float floatingHintPosY = normalHintPosY + getPaint().getFontMetricsInt().top + getScrollY() - mLabelPadding;
         final float normalHintSize = getTextSize();
         final float floatingHintSize = normalHintSize * mHintScale;
 
@@ -130,7 +147,7 @@ protected void onDraw(Canvas canvas) {
     }
 
     private void drawAnimationFrame(Canvas canvas, float fromSize, float toSize,
-                                     float hintPosX, float fromY, float toY) {
+                                    float hintPosX, float fromY, float toY) {
         final float textSize = lerp(fromSize, toSize);
         final float hintPosY = lerp(fromY, toY);
         mFloatingHintPaint.setTextSize(textSize);
@@ -141,4 +158,19 @@ private float lerp(float from, float to) {
         final float alpha = (float) mAnimationFrame / (mAnimationSteps - 1);
         return from * (1 - alpha) + to * alpha;
     }
-}
+
+    @Override
+    public Parcelable onSaveInstanceState() {
+        Bundle bundle = new Bundle();
+        bundle.putParcelable(ARG_SUPER_STATE, super.onSaveInstanceState());
+        bundle.putBoolean(ARG_TEXT_CHANGED_STATE, mWasEmpty);
+        return bundle;
+    }
+
+    @Override
+    public void onRestoreInstanceState(Parcelable state) {
+        Bundle bundle = (Bundle) state;
+        mWasEmpty = bundle.getBoolean(ARG_SUPER_STATE);
+        super.onRestoreInstanceState(bundle.getParcelable(ARG_TEXT_CHANGED_STATE));
+    }
+}

floatinghintedittext/src/main/res/values/attrs.xml

@@ -1,4 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <attr name="floatingHintEditTextStyle" format="reference" />
+    <declare-styleable name="FloatLabelView">
+        <attr name="dividePadding" format="dimension"/>
+        <attr name="hintScale" format="float"/>
+        <attr name="animationSteps" format="integer"/>
+    </declare-styleable>
 </resources>