Java tutorial
/* * Copyright 2015 Priyesh Patel * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.chromium.fontinstaller.util; import android.animation.Animator; import android.animation.AnimatorListenerAdapter; import android.animation.AnimatorSet; import android.animation.ObjectAnimator; import android.app.Activity; import android.content.Context; import android.content.res.Resources; import android.graphics.Rect; import android.os.Build; import android.support.design.widget.Snackbar; import android.support.v4.app.Fragment; import android.support.v4.content.ContextCompat; import android.view.View; import android.view.ViewAnimationUtils; import android.view.ViewGroupOverlay; import android.view.animation.AccelerateDecelerateInterpolator; import android.view.animation.AnimationUtils; import android.widget.Toast; import com.chromium.fontinstaller.R; import timber.log.Timber; public class ViewUtils { public static int dpToPixels(int dp, Context context) { final float SCALE = context.getResources().getDisplayMetrics().density; return (int) (dp * SCALE + 0.5f); } public static boolean isLollipop() { return Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP; } public static int getStatusBarHeight(Context context) { final Resources resources = context.getResources(); final int resourceId = resources.getIdentifier("status_bar_height", "dimen", "android"); return resourceId > 0 ? resources.getDimensionPixelSize(resourceId) : 0; } public static void reveal(Activity activity, View view, View sourceView, int colorRes) { if (activity == null || view == null || sourceView == null) return; if (isLollipop()) { final ViewGroupOverlay groupOverlay = (ViewGroupOverlay) activity.getWindow().getDecorView() .getOverlay(); final Rect displayRect = new Rect(); view.getGlobalVisibleRect(displayRect); // Make reveal cover the display and status bar. final View revealView = new View(activity); revealView.setTop(displayRect.top); revealView.setBottom(displayRect.bottom); revealView.setLeft(displayRect.left); revealView.setRight(displayRect.right); revealView.setBackgroundColor(ContextCompat.getColor(activity, colorRes)); groupOverlay.add(revealView); final int[] clearLocation = new int[2]; sourceView.getLocationInWindow(clearLocation); clearLocation[0] += sourceView.getWidth() / 2; clearLocation[1] += sourceView.getHeight() / 2; final int revealCenterX = clearLocation[0] - revealView.getLeft(); final int revealCenterY = clearLocation[1] - revealView.getTop(); final double x1_2 = Math.pow(revealView.getLeft() - revealCenterX, 2); final double x2_2 = Math.pow(revealView.getRight() - revealCenterX, 2); final double y_2 = Math.pow(revealView.getTop() - revealCenterY, 2); final float revealRadius = (float) Math.max(Math.sqrt(x1_2 + y_2), Math.sqrt(x2_2 + y_2)); try { final Animator revealAnimator = ViewAnimationUtils.createCircularReveal(revealView, revealCenterX, revealCenterY, 0.0f, revealRadius); revealAnimator .setDuration(activity.getResources().getInteger(android.R.integer.config_mediumAnimTime)); final Animator alphaAnimator = ObjectAnimator.ofFloat(revealView, View.ALPHA, 0.0f); alphaAnimator .setDuration(activity.getResources().getInteger(android.R.integer.config_shortAnimTime)); alphaAnimator.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { super.onAnimationEnd(animation); view.startAnimation(AnimationUtils.loadAnimation(activity, R.anim.abc_fade_in)); view.setVisibility(View.VISIBLE); } }); final AnimatorSet animatorSet = new AnimatorSet(); animatorSet.play(revealAnimator).before(alphaAnimator); animatorSet.setInterpolator(new AccelerateDecelerateInterpolator()); animatorSet.addListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animator) { groupOverlay.remove(revealView); } }); animatorSet.start(); } catch (IllegalStateException e) { Timber.i("View is detached - not animating"); } } else { view.setVisibility(View.VISIBLE); } } public static void animGrowFromCenter(View view, Context context) { if (context == null || view == null) return; view.startAnimation(AnimationUtils.loadAnimation(context, R.anim.grow_from_center)); } public static void animShrinkToCenter(View view, Context context) { if (context == null || view == null) return; view.startAnimation(AnimationUtils.loadAnimation(context, R.anim.shrink_to_center)); } public static void animSlideInBottom(View view, Context context) { if (context == null || view == null) return; view.startAnimation(AnimationUtils.loadAnimation(context, R.anim.abc_slide_in_bottom)); } public static void animSlideUp(View view, Context context) { if (context == null || view == null) return; view.startAnimation(AnimationUtils.loadAnimation(context, R.anim.abc_slide_out_top)); } public static void snackbar(int messageResId, View parent) { if (parent == null) return; Snackbar.make(parent, messageResId, Snackbar.LENGTH_SHORT).show(); } public static void snackbar(String message, View parent) { if (parent == null) return; Snackbar.make(parent, message, Snackbar.LENGTH_SHORT).show(); } public static void toast(int messageResId, Context context) { Toast.makeText(context, messageResId, Toast.LENGTH_SHORT).show(); } public static void toast(String message, Context context) { Toast.makeText(context, message, Toast.LENGTH_SHORT).show(); } public static void toast(int messageResId, Fragment fragment) { toast(messageResId, fragment.getActivity()); } public static void toast(String message, Fragment fragment) { toast(message, fragment.getActivity()); } }