Initial checkin of AOSP Messaging app.
b/23110861 Change-Id: I11db999bd10656801e618f78ab2b2ef74136fff1
This commit is contained in:
Mike Dodd
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/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.messaging.ui;
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import android.content.Context;
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import android.content.res.ColorStateList;
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import android.content.res.TypedArray;
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import android.graphics.Outline;
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import android.graphics.drawable.ColorDrawable;
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import android.support.v4.view.PagerAdapter;
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import android.support.v4.view.ViewPager;
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import android.util.AttributeSet;
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import android.util.TypedValue;
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import android.view.Gravity;
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import android.view.View;
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import android.view.ViewOutlineProvider;
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import android.widget.FrameLayout;
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import android.widget.HorizontalScrollView;
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import android.widget.LinearLayout;
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import android.widget.TextView;
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import android.widget.Toast;
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import com.android.messaging.Factory;
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import com.android.messaging.R;
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import com.android.messaging.util.OsUtil;
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/**
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* Lightweight implementation of ViewPager tabs. This looks similar to traditional actionBar tabs,
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* but allows for the view containing the tabs to be placed anywhere on screen. Text-related
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* attributes can also be assigned in XML - these will get propogated to the child TextViews
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* automatically.
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*
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* Note: this file is taken from the AOSP /packages/apps/ContactsCommon/src/com/android/contacts/
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* common/list/ViewPagerTabs.java. Some platform specific API calls (e.g. ViewOutlineProvider which
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* assumes L and above) have been modified to support down to Api Level 16.
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*/
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public class ViewPagerTabs extends HorizontalScrollView implements ViewPager.OnPageChangeListener {
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ViewPager mPager;
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private ViewPagerTabStrip mTabStrip;
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/**
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* Linearlayout that will contain the TextViews serving as tabs. This is the only child
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* of the parent HorizontalScrollView.
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*/
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final int mTextStyle;
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final ColorStateList mTextColor;
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final int mTextSize;
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final boolean mTextAllCaps;
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int mPrevSelected = -1;
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int mSidePadding;
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private static final int TAB_SIDE_PADDING_IN_DPS = 10;
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// TODO: This should use <declare-styleable> in the future
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private static final int[] ATTRS = new int[] {
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android.R.attr.textSize,
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android.R.attr.textStyle,
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android.R.attr.textColor,
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android.R.attr.textAllCaps
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};
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/**
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* Shows a toast with the tab description when long-clicked.
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*/
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private class OnTabLongClickListener implements OnLongClickListener {
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final String mTabDescription;
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public OnTabLongClickListener(String tabDescription) {
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mTabDescription = tabDescription;
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}
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@Override
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public boolean onLongClick(View v) {
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final int[] screenPos = new int[2];
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getLocationOnScreen(screenPos);
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final Context context = getContext();
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final int width = getWidth();
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final int height = getHeight();
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final int screenWidth = context.getResources().getDisplayMetrics().widthPixels;
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Toast toast = Toast.makeText(context, mTabDescription, Toast.LENGTH_SHORT);
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// Show the toast under the tab
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toast.setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL,
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(screenPos[0] + width / 2) - screenWidth / 2, screenPos[1] + height);
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toast.show();
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return true;
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}
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}
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public ViewPagerTabs(Context context) {
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this(context, null);
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}
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public ViewPagerTabs(Context context, AttributeSet attrs) {
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this(context, attrs, 0);
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}
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public ViewPagerTabs(Context context, AttributeSet attrs, int defStyle) {
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super(context, attrs, defStyle);
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setFillViewport(true);
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mSidePadding = (int) (getResources().getDisplayMetrics().density * TAB_SIDE_PADDING_IN_DPS);
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final TypedArray a = context.obtainStyledAttributes(attrs, ATTRS);
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mTextSize = a.getDimensionPixelSize(0, 0);
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mTextStyle = a.getInt(1, 0);
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mTextColor = a.getColorStateList(2);
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mTextAllCaps = a.getBoolean(3, false);
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mTabStrip = new ViewPagerTabStrip(context);
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addView(mTabStrip,
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new FrameLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT));
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a.recycle();
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// enable shadow casting from view bounds
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if (OsUtil.isAtLeastL()) {
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setOutlineProvider(new ViewOutlineProvider() {
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@Override
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public void getOutline(View view, Outline outline) {
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outline.setRect(0, 0, view.getWidth(), view.getHeight());
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}
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});
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}
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}
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public void setViewPager(ViewPager viewPager) {
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mPager = viewPager;
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addTabs(mPager.getAdapter());
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}
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private void addTabs(PagerAdapter adapter) {
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mTabStrip.removeAllViews();
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final int count = adapter.getCount();
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for (int i = 0; i < count; i++) {
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addTab(adapter.getPageTitle(i), i);
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}
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}
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private void addTab(CharSequence tabTitle, final int position) {
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final TextView textView = new TextView(getContext());
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textView.setText(tabTitle);
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textView.setBackgroundResource(R.drawable.contact_picker_tab_background_selector);
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textView.setGravity(Gravity.CENTER);
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textView.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View v) {
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mPager.setCurrentItem(getRtlPosition(position));
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}
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});
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// Assign various text appearance related attributes to child views.
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if (mTextStyle > 0) {
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textView.setTypeface(textView.getTypeface(), mTextStyle);
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}
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if (mTextSize > 0) {
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textView.setTextSize(TypedValue.COMPLEX_UNIT_PX, mTextSize);
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}
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if (mTextColor != null) {
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textView.setTextColor(mTextColor);
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}
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textView.setAllCaps(mTextAllCaps);
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textView.setPadding(mSidePadding, 0, mSidePadding, 0);
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mTabStrip.addView(textView, new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
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LayoutParams.MATCH_PARENT, 1));
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// Default to the first child being selected
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if (position == 0) {
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mPrevSelected = 0;
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textView.setSelected(true);
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}
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}
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@Override
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public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
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position = getRtlPosition(position);
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int tabStripChildCount = mTabStrip.getChildCount();
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if ((tabStripChildCount == 0) || (position < 0) || (position >= tabStripChildCount)) {
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return;
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}
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mTabStrip.onPageScrolled(position, positionOffset, positionOffsetPixels);
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}
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@Override
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public void onPageSelected(int position) {
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position = getRtlPosition(position);
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int tabStripChildCount = mTabStrip.getChildCount();
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if ((tabStripChildCount == 0) || (position < 0) || (position >= tabStripChildCount)) {
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return;
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}
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if (mPrevSelected >= 0 && mPrevSelected < tabStripChildCount) {
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mTabStrip.getChildAt(mPrevSelected).setSelected(false);
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}
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final View selectedChild = mTabStrip.getChildAt(position);
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selectedChild.setSelected(true);
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// Update scroll position
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final int scrollPos = selectedChild.getLeft() - (getWidth() - selectedChild.getWidth()) / 2;
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smoothScrollTo(scrollPos, 0);
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mPrevSelected = position;
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}
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@Override
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public void onPageScrollStateChanged(int state) {
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}
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private int getRtlPosition(int position) {
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if (OsUtil.isAtLeastJB_MR2() && Factory.get().getApplicationContext().getResources()
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.getConfiguration().getLayoutDirection() == View.LAYOUT_DIRECTION_RTL) {
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return mTabStrip.getChildCount() - 1 - position;
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}
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return position;
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}
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public int getSelectedItemPosition() {
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return mPrevSelected;
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}
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}
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