Java tutorial
/* 50AH-code ========= 50 Android Hacks (http://manning.com/sessa/) book source code Copyright (c) 2012 Manning Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /* * Copyright (C) 2011 The Android Open Source Project * * 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.actionbarsherlock.internal.widget; import android.content.Context; import android.content.res.Configuration; import android.content.res.TypedArray; import android.os.Build; import android.util.AttributeSet; import android.view.View; import android.view.animation.DecelerateInterpolator; import android.view.animation.Interpolator; import com.actionbarsherlock.R; import com.actionbarsherlock.internal.nineoldandroids.animation.Animator; import com.actionbarsherlock.internal.nineoldandroids.animation.AnimatorSet; import com.actionbarsherlock.internal.nineoldandroids.animation.ObjectAnimator; import com.actionbarsherlock.internal.nineoldandroids.view.NineViewGroup; import com.actionbarsherlock.internal.view.menu.ActionMenuPresenter; import com.actionbarsherlock.internal.view.menu.ActionMenuView; import static com.actionbarsherlock.internal.ResourcesCompat.getResources_getBoolean; public abstract class AbsActionBarView extends NineViewGroup { protected ActionMenuView mMenuView; protected ActionMenuPresenter mActionMenuPresenter; protected ActionBarContainer mSplitView; protected boolean mSplitActionBar; protected boolean mSplitWhenNarrow; protected int mContentHeight; final Context mContext; protected Animator mVisibilityAnim; protected final VisibilityAnimListener mVisAnimListener = new VisibilityAnimListener(); private static final /*Time*/Interpolator sAlphaInterpolator = new DecelerateInterpolator(); private static final int FADE_DURATION = 200; public AbsActionBarView(Context context) { super(context); mContext = context; } public AbsActionBarView(Context context, AttributeSet attrs) { super(context, attrs); mContext = context; } public AbsActionBarView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); mContext = context; } /* * Must be public so we can dispatch pre-2.2 via ActionBarImpl. */ @Override public void onConfigurationChanged(Configuration newConfig) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.FROYO) { super.onConfigurationChanged(newConfig); } else if (mMenuView != null) { mMenuView.onConfigurationChanged(newConfig); } // Action bar can change size on configuration changes. // Reread the desired height from the theme-specified style. TypedArray a = getContext().obtainStyledAttributes(null, R.styleable.SherlockActionBar, R.attr.actionBarStyle, 0); setContentHeight(a.getLayoutDimension(R.styleable.SherlockActionBar_height, 0)); a.recycle(); if (mSplitWhenNarrow) { setSplitActionBar(getResources_getBoolean(getContext(), R.bool.abs__split_action_bar_is_narrow)); } if (mActionMenuPresenter != null) { mActionMenuPresenter.onConfigurationChanged(newConfig); } } /** * Sets whether the bar should be split right now, no questions asked. * @param split true if the bar should split */ public void setSplitActionBar(boolean split) { mSplitActionBar = split; } /** * Sets whether the bar should split if we enter a narrow screen configuration. * @param splitWhenNarrow true if the bar should check to split after a config change */ public void setSplitWhenNarrow(boolean splitWhenNarrow) { mSplitWhenNarrow = splitWhenNarrow; } public void setContentHeight(int height) { mContentHeight = height; requestLayout(); } public int getContentHeight() { return mContentHeight; } public void setSplitView(ActionBarContainer splitView) { mSplitView = splitView; } /** * @return Current visibility or if animating, the visibility being animated to. */ public int getAnimatedVisibility() { if (mVisibilityAnim != null) { return mVisAnimListener.mFinalVisibility; } return getVisibility(); } public void animateToVisibility(int visibility) { if (mVisibilityAnim != null) { mVisibilityAnim.cancel(); } if (visibility == VISIBLE) { if (getVisibility() != VISIBLE) { setAlpha(0); if (mSplitView != null && mMenuView != null) { mMenuView.setAlpha(0); } } ObjectAnimator anim = ObjectAnimator.ofFloat(this, "alpha", 1); anim.setDuration(FADE_DURATION); anim.setInterpolator(sAlphaInterpolator); if (mSplitView != null && mMenuView != null) { AnimatorSet set = new AnimatorSet(); ObjectAnimator splitAnim = ObjectAnimator.ofFloat(mMenuView, "alpha", 1); splitAnim.setDuration(FADE_DURATION); set.addListener(mVisAnimListener.withFinalVisibility(visibility)); set.play(anim).with(splitAnim); set.start(); } else { anim.addListener(mVisAnimListener.withFinalVisibility(visibility)); anim.start(); } } else { ObjectAnimator anim = ObjectAnimator.ofFloat(this, "alpha", 0); anim.setDuration(FADE_DURATION); anim.setInterpolator(sAlphaInterpolator); if (mSplitView != null && mMenuView != null) { AnimatorSet set = new AnimatorSet(); ObjectAnimator splitAnim = ObjectAnimator.ofFloat(mMenuView, "alpha", 0); splitAnim.setDuration(FADE_DURATION); set.addListener(mVisAnimListener.withFinalVisibility(visibility)); set.play(anim).with(splitAnim); set.start(); } else { anim.addListener(mVisAnimListener.withFinalVisibility(visibility)); anim.start(); } } } @Override public void setVisibility(int visibility) { if (mVisibilityAnim != null) { mVisibilityAnim.end(); } super.setVisibility(visibility); } public boolean showOverflowMenu() { if (mActionMenuPresenter != null) { return mActionMenuPresenter.showOverflowMenu(); } return false; } public void postShowOverflowMenu() { post(new Runnable() { public void run() { showOverflowMenu(); } }); } public boolean hideOverflowMenu() { if (mActionMenuPresenter != null) { return mActionMenuPresenter.hideOverflowMenu(); } return false; } public boolean isOverflowMenuShowing() { if (mActionMenuPresenter != null) { return mActionMenuPresenter.isOverflowMenuShowing(); } return false; } public boolean isOverflowReserved() { return mActionMenuPresenter != null && mActionMenuPresenter.isOverflowReserved(); } public void dismissPopupMenus() { if (mActionMenuPresenter != null) { mActionMenuPresenter.dismissPopupMenus(); } } protected int measureChildView(View child, int availableWidth, int childSpecHeight, int spacing) { child.measure(MeasureSpec.makeMeasureSpec(availableWidth, MeasureSpec.AT_MOST), childSpecHeight); availableWidth -= child.getMeasuredWidth(); availableWidth -= spacing; return Math.max(0, availableWidth); } protected int positionChild(View child, int x, int y, int contentHeight) { int childWidth = child.getMeasuredWidth(); int childHeight = child.getMeasuredHeight(); int childTop = y + (contentHeight - childHeight) / 2; child.layout(x, childTop, x + childWidth, childTop + childHeight); return childWidth; } protected int positionChildInverse(View child, int x, int y, int contentHeight) { int childWidth = child.getMeasuredWidth(); int childHeight = child.getMeasuredHeight(); int childTop = y + (contentHeight - childHeight) / 2; child.layout(x - childWidth, childTop, x, childTop + childHeight); return childWidth; } protected class VisibilityAnimListener implements Animator.AnimatorListener { private boolean mCanceled = false; int mFinalVisibility; public VisibilityAnimListener withFinalVisibility(int visibility) { mFinalVisibility = visibility; return this; } @Override public void onAnimationStart(Animator animation) { setVisibility(VISIBLE); mVisibilityAnim = animation; mCanceled = false; } @Override public void onAnimationEnd(Animator animation) { if (mCanceled) return; mVisibilityAnim = null; setVisibility(mFinalVisibility); if (mSplitView != null && mMenuView != null) { mMenuView.setVisibility(mFinalVisibility); } } @Override public void onAnimationCancel(Animator animation) { mCanceled = true; } @Override public void onAnimationRepeat(Animator animation) { } } }