Java tutorial
/* * Copyright (c) 2014 OpenSilk Productions LLC * * 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/>. */ package org.opensilk.common.ui.widget; import android.animation.AnimatorInflater; import android.annotation.SuppressLint; import android.content.Context; import android.content.res.ColorStateList; import android.content.res.TypedArray; import android.graphics.Color; import android.graphics.drawable.Drawable; import android.graphics.drawable.LayerDrawable; import android.graphics.drawable.RippleDrawable; import android.graphics.drawable.ShapeDrawable; import android.graphics.drawable.StateListDrawable; import android.graphics.drawable.shapes.OvalShape; import android.os.Build; import android.support.v4.view.GestureDetectorCompat; import android.support.v4.view.MotionEventCompat; import android.util.AttributeSet; import android.view.GestureDetector; import android.view.MotionEvent; import android.view.SoundEffectConstants; import android.view.View; import android.view.ViewAnimationUtils; import android.view.accessibility.AccessibilityEvent; import android.widget.ImageButton; import org.opensilk.common.ui.R; import org.opensilk.common.ui.util.ThemeUtils; import org.opensilk.common.core.util.VersionUtils; /** * Created by drew on 10/30/14. */ public class FloatingActionButton extends ImageButton { public interface OnDoubleClickListener { void onDoubleClick(View view); } public static final int COLOR_ACCENT = 0; public static final int COLOR_WHITE = 1; public static final int COLOR_BLACK = 2; protected int mColor; //Used to create the state list for compat drawable //https://code.google.com/p/android/issues/detail?id=26251 protected int mColorNormal; protected int mColorPressed; private OnDoubleClickListener mOnDoubleClickListener; private GestureDetectorCompat mGestureDetector; public FloatingActionButton(Context context, AttributeSet attrs) { this(context, attrs, 0); } public FloatingActionButton(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); mGestureDetector = new GestureDetectorCompat(getContext(), new GestureListener()); TypedArray attr = context.obtainStyledAttributes(attrs, R.styleable.FloatingActionButton, defStyleAttr, 0); if (attr != null) { try { mColor = attr.getInt(R.styleable.FloatingActionButton_fabColor, COLOR_ACCENT); switch (mColor) { case COLOR_BLACK: mColorNormal = Color.BLACK; break; case COLOR_WHITE: mColorNormal = Color.WHITE; break; case COLOR_ACCENT: default: mColorNormal = ThemeUtils.getColorAccent(getContext()); } mColorPressed = ThemeUtils.getColorControlNormal(getContext()); } finally { attr.recycle(); } } init(); } protected void init() { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { switch (mColor) { case COLOR_BLACK: setBackgroundResource(R.drawable.fab_ripple_black); break; case COLOR_WHITE: setBackgroundResource(R.drawable.fab_ripple_white); break; case COLOR_ACCENT: default: setBackgroundResource(R.drawable.fab_ripple_accent); break; } setStateListAnimator(AnimatorInflater.loadStateListAnimator(getContext(), R.animator.fab_elevation)); setElevation(getResources().getDimension(R.dimen.fab_elevation)); // setImageResource(mIcon); return; } else { setBackgroundCompat(createSelectableDrawable()); // setImageResource(mIcon); } } /** * >= api 21 */ @SuppressWarnings("NewApi") protected RippleDrawable createRippleDrawable() { ShapeDrawable drawable = new ShapeDrawable(new OvalShape()); drawable.getPaint().setColor(mColorNormal); return new RippleDrawable(createRippleStateList(), drawable, null); } protected ColorStateList createRippleStateList() { int[][] states = new int[1][]; int[] colors = new int[1]; states[0] = new int[0]; colors[0] = mColorPressed; return new ColorStateList(states, colors); } /** * <= api 19 */ protected Drawable createSelectableDrawable() { ShapeDrawable drawableNormal = new ShapeDrawable(new OvalShape()); drawableNormal.getPaint().setColor(mColorNormal); StateListDrawable stateDrawable = new StateListDrawable(); ShapeDrawable drawableHighlight = new ShapeDrawable(new OvalShape()); drawableHighlight.getPaint().setColor(mColorPressed); stateDrawable.addState(new int[] { android.R.attr.state_pressed }, drawableHighlight); stateDrawable.addState(new int[0], null); LayerDrawable layerDrawable = new LayerDrawable(new Drawable[] { drawableNormal, stateDrawable }); return layerDrawable; } @Override public void setImageLevel(int level) { if (getDrawable() != null && getDrawable().getLevel() == level) return; maybeDoCircularReveal(); super.setImageLevel(level); } @Override public void setImageState(int[] state, boolean merge) { if (getDrawable() != null && getDrawable().getState() == state) return; maybeDoCircularReveal(); super.setImageState(state, merge); } @SuppressWarnings("NewApi") protected void maybeDoCircularReveal() { if (true) return; //XXX STUBBED till i make it look better if (VersionUtils.hasLollipop()) { ViewAnimationUtils.createCircularReveal(this, getWidth() / 2, getHeight() / 2, 0, getHeight() * 2) .start(); } } @SuppressLint("NewApi") @SuppressWarnings("deprecation") protected void setBackgroundCompat(Drawable drawable) { if (VersionUtils.hasJellyBean()) { setBackground(drawable); } else { setBackgroundDrawable(drawable); } } public void setOnDoubleClickListener(OnDoubleClickListener l) { if (!isClickable()) setClickable(true); mOnDoubleClickListener = l; } protected boolean performDoubleClick() { if (mOnDoubleClickListener != null) { sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED); playSoundEffect(SoundEffectConstants.CLICK); mOnDoubleClickListener.onDoubleClick(this); return true; } else { return performClick(); } } @Override public boolean onTouchEvent(MotionEvent event) { switch (MotionEventCompat.getActionMasked(event)) { case MotionEvent.ACTION_DOWN: setPressed(true); break; case MotionEvent.ACTION_CANCEL: case MotionEvent.ACTION_UP: setPressed(false); break; } return mGestureDetector.onTouchEvent(event); } private class GestureListener extends GestureDetector.SimpleOnGestureListener { @Override public boolean onDown(MotionEvent e) { return isClickable(); } @Override public void onShowPress(MotionEvent e) { } @Override public void onLongPress(MotionEvent e) { performLongClick(); } @Override public boolean onSingleTapConfirmed(MotionEvent e) { return isClickable() && performClick(); } @Override public boolean onDoubleTap(MotionEvent e) { return isClickable() && performDoubleClick(); } } }