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Android Material Floating Action Button (Supports API 14+ with shadows and 21+ with Lollipop elevation)
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package com.bigoven.android.widgets; | |
import android.animation.AnimatorSet; | |
import android.animation.ObjectAnimator; | |
import android.annotation.SuppressLint; | |
import android.content.Context; | |
import android.content.res.TypedArray; | |
import android.graphics.Canvas; | |
import android.graphics.Color; | |
import android.graphics.Paint; | |
import android.graphics.drawable.Drawable; | |
import android.graphics.drawable.ShapeDrawable; | |
import android.graphics.drawable.shapes.OvalShape; | |
import android.os.Build; | |
import android.util.AttributeSet; | |
import android.view.MotionEvent; | |
import android.view.View; | |
import android.view.animation.AccelerateInterpolator; | |
import android.widget.ImageButton; | |
import com.bigoven.android.R; | |
import com.bigoven.android.utilities.UiHelper; | |
@SuppressLint("ClickableViewAccessibility") | |
/** | |
* This class is a custom view that encompasses the functionality of Google's Material Design "Floating Action Button" | |
* It supports API 14+ devices. | |
* | |
* Copyright (C) 2015 Chantell Osejo | |
* | |
* This program is free software: you can redistribute it and/or modify | |
* it under the terms of the GNU General Public License as published by | |
* the Free Software Foundation, either version 3 of the License, or | |
* (at your option) any later version. | |
* | |
* This program is distributed in the hope that it will be useful, | |
* but WITHOUT ANY WARRANTY; without even the implied warranty of | |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
* GNU General Public License for more details. | |
* | |
* You should have received a copy of the GNU General Public License | |
* along with this program. If not, see <http://www.gnu.org/licenses/> | |
*/ | |
public class FloatingActionButton extends ImageButton { | |
public static final int GOOGLE_DESIGN_GUIDELINE_RECOMMENDED_DIAMETER_PX = UiHelper.convertDpToPixel(56); | |
public static final int GOOGLE_DESIGN_GUIDELINE_RECOMMENDED_MINI_DIAMETER_PX = UiHelper.convertDpToPixel(40); | |
final static AccelerateInterpolator accelerateInterpolator = new AccelerateInterpolator(); | |
private Paint mBackgroundPaint; | |
private int mColor = Color.WHITE; | |
private int visibility = View.VISIBLE; | |
private ShapeDrawable mCircleBackground; | |
public FloatingActionButton(Context context) { | |
super(context); | |
init(); | |
} | |
public FloatingActionButton(Context context, AttributeSet attrs) { | |
super(context, attrs); | |
TypedArray a = context.getTheme().obtainStyledAttributes( | |
attrs, | |
R.styleable.FloatingActionButton, | |
0, 0); | |
try { | |
mColor = a.getColor(R.styleable.FloatingActionButton_buttonColor, Color.WHITE); | |
} finally { | |
a.recycle(); | |
} | |
init(); | |
} | |
private void init() { | |
setColor(mColor); | |
setScaleType(ScaleType.CENTER_INSIDE); | |
visibility = getVisibility(); | |
} | |
public void setColor(int color) { | |
this.mColor = color; | |
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) { | |
setLayerType(LAYER_TYPE_SOFTWARE, mBackgroundPaint); | |
mBackgroundPaint = new Paint(Paint.ANTI_ALIAS_FLAG); | |
mBackgroundPaint.setColor(mColor); | |
mBackgroundPaint.setShadowLayer(10.0f, 0.0f, 3.5f, Color.argb(100, 0, 0, 0)); | |
setBackgroundDrawable(null); | |
} else { | |
if (null == mCircleBackground) { | |
mCircleBackground = new ShapeDrawable(new OvalShape()); | |
setBackground(mCircleBackground); | |
setElevation(UiHelper.convertDpToPixel(8)); | |
} | |
mCircleBackground.getPaint().setColor(color); | |
} | |
invalidate(); | |
} | |
@Override | |
protected void onDraw(Canvas canvas) { | |
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) { | |
canvas.drawCircle(getWidth() / 2, getHeight() / 2, (float) (getWidth() / 2.6), mBackgroundPaint); | |
} | |
super.onDraw(canvas); | |
} | |
@Override | |
public boolean onTouchEvent(MotionEvent event) { | |
if (event.getAction() == MotionEvent.ACTION_UP) { | |
setAlpha(1.0f); | |
} else if (event.getAction() == MotionEvent.ACTION_DOWN) { | |
setAlpha(0.6f); | |
} | |
return super.onTouchEvent(event); | |
} | |
public void setVisibilityAfterDelay(final int visibility, long delay) { | |
if (this.visibility == visibility) { | |
return; | |
} | |
this.visibility = visibility; | |
boolean hide = this.visibility != View.VISIBLE; | |
ObjectAnimator scaleX = ObjectAnimator.ofFloat(this, SCALE_X, hide ? 1 : 0, hide ? 0 : 1); | |
ObjectAnimator scaleY = ObjectAnimator.ofFloat(this, SCALE_Y, hide ? 1 : 0, hide ? 0 : 1); | |
ObjectAnimator alpha = ObjectAnimator.ofFloat(this, ALPHA, hide ? 1 : 0, hide ? 0 : 1); | |
ObjectAnimator rotate = ObjectAnimator.ofFloat(this, ROTATION, 0f, 360f); | |
final AnimatorSet animSetXY = new AnimatorSet(); | |
animSetXY.playTogether(scaleX, scaleY, rotate, alpha); | |
animSetXY.setInterpolator(accelerateInterpolator); | |
animSetXY.setDuration(hide ? 200 : 300); | |
animSetXY.setStartDelay(delay); | |
animSetXY.start(); | |
} | |
@Override | |
/** | |
* Hijacking the visibility parameter to animate hiding/showing the button | |
*/ | |
public void setVisibility(final int visibility) { | |
setVisibilityAfterDelay(visibility, 0); | |
} | |
static public class Builder { | |
private final Context context; | |
int color = Color.WHITE; | |
private Drawable drawable; | |
/** | |
* Builder of the fab button | |
* | |
* @param context should be an Activity context, used to create the view | |
*/ | |
public Builder(Context context) { | |
this.context = context; | |
} | |
/** | |
* Sets the FAB drawable | |
*/ | |
public Builder setDrawable(final Drawable drawable) { | |
this.drawable = drawable; | |
return this; | |
} | |
/** | |
* Sets the FAB color | |
*/ | |
public Builder setColor(final int color) { | |
this.color = color; | |
return this; | |
} | |
public FloatingActionButton create() { | |
final FloatingActionButton button = new FloatingActionButton(context); | |
button.setColor(this.color); | |
button.setImageDrawable(this.drawable); | |
return button; | |
} | |
} | |
} |
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Also, don't forget...in your attrs.xml :