Java tutorial
/* * Copyright (C) 2011 The Android Open Source Project * Copyright (C) 2011 Jake Wharton * * 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.cyou.cma.clockscreen.widget; import static android.view.ViewGroup.LayoutParams.MATCH_PARENT; import static android.view.ViewGroup.LayoutParams.WRAP_CONTENT; import java.util.ArrayList; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.RectF; import android.support.v4.view.PagerAdapter; import android.support.v4.view.ViewPager; import android.support.v4.view.ViewPager.OnPageChangeListener; import android.util.AttributeSet; import android.view.View; import android.view.ViewGroup; import android.widget.HorizontalScrollView; import android.widget.LinearLayout; import android.widget.TextView; import com.cynad.cma.locker.R; import com.cyou.cma.clockscreen.util.Util; import com.cyou.cma.clockscreen.widget.material.LFrameLayout; import com.cyou.cma.clockscreen.widget.material.MaterialStyle; /** * This widget implements the dynamic action bar tab behavior that can change * across different configurations or circumstances. */ public class TabPageIndicator extends HorizontalScrollView implements PageIndicator { /** Title text used when no title is provided by the adapter. */ private static final CharSequence EMPTY_TITLE = ""; /** * Interface for a callback when the selected tab has been reselected. */ public interface OnTabReselectedListener { /** * Callback when the selected tab has been reselected. * * @param position * Position of the current center item. */ void onTabReselected(int position); } public interface HeHeListener { void onHehe(); } private Runnable mTabSelector; private final OnClickListener mTabClickListener = new OnClickListener() { @Override public void onClick(View view) { TabView tabView = (TabView) view; final int oldSelected = mViewPager.getCurrentItem(); final int newSelected = tabView.getIndex(); mViewPager.setCurrentItem(newSelected); if (oldSelected == newSelected && mTabReselectedListener != null) { mTabReselectedListener.onTabReselected(newSelected); } if (mHeheListener != null) { mHeheListener.onHehe(); } } }; private final IcsLinearLayout mTabLayout; private ViewPager mViewPager; private ViewPager.OnPageChangeListener mListener; private int mMaxTabWidth; private int mSelectedTabIndex; private float mOffset = 0; private OnTabReselectedListener mTabReselectedListener; private HeHeListener mHeheListener; private ArrayList<String> titles = new ArrayList<String>(); private float mDensity; public void addTitle(String title) { titles.add(title); } public TabPageIndicator(Context context) { this(context, null); } private boolean drawunder; private boolean mNeedDelayClick = false; public TabPageIndicator(Context context, AttributeSet attrs) { super(context, attrs); setHorizontalScrollBarEnabled(false); paint.setColor(context.getResources().getColor(R.color.beautycenter_tab_background_highlight_color)); mDensity = context.getResources().getDisplayMetrics().density; mTabLayout = new IcsLinearLayout(context, R.attr.vpiTabPageIndicatorStyle); TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.tabpageindicator); // final String aspect = "square"; drawunder = a.getBoolean(R.styleable.tabpageindicator_drawunder, false); a.recycle(); TypedArray aLocker = context.obtainStyledAttributes(attrs, R.styleable.LButtonStyle); mNeedDelayClick = aLocker.getBoolean(R.styleable.LButtonStyle_widget_delayclick, false); aLocker.recycle(); addView(mTabLayout, new ViewGroup.LayoutParams(WRAP_CONTENT, MATCH_PARENT)); } public void setOnTabReselectedListener(OnTabReselectedListener listener) { mTabReselectedListener = listener; } public void setOnHeheListener(HeHeListener listener) { this.mHeheListener = listener; } private RectF mRectF = new RectF(); private Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG); private int mSelectedTabIndex2 = 0; public void invalidateForce(int position) { mSelectedTabIndex2 = position; invalidate(); } @Override protected void dispatchDraw(Canvas canvas) { super.dispatchDraw(canvas); // if(mViewPager==null) return; int height = getHeight(); final int count = mViewPager.getAdapter().getCount(); if (mSelectedTabIndex2 == count - 1) { if (drawunder) { canvas.drawRect(mTabLayout.getChildAt(mSelectedTabIndex2).getLeft(), height - 6 * mDensity, mTabLayout.getChildAt(mSelectedTabIndex2).getRight(), height, paint); } return; } int left = mTabLayout.getChildAt(mSelectedTabIndex2).getLeft(); float newLeft = left + mOffset * mTabLayout.getChildAt(mSelectedTabIndex2).getWidth(); int right = mTabLayout.getChildAt(mSelectedTabIndex2).getRight(); float newRight = right + mOffset * mTabLayout.getChildAt(mSelectedTabIndex2 + 1).getWidth(); mRectF.set(newLeft, height - 6 * mDensity, newRight, height); if (drawunder) canvas.drawRect(mRectF, paint); } @Override public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { final int widthMode = MeasureSpec.getMode(widthMeasureSpec); final boolean lockedExpanded = widthMode == MeasureSpec.EXACTLY; setFillViewport(lockedExpanded); final int childCount = mTabLayout.getChildCount(); if (childCount > 1 && (widthMode == MeasureSpec.EXACTLY || widthMode == MeasureSpec.AT_MOST)) { if (childCount > 2) { mMaxTabWidth = (int) (MeasureSpec.getSize(widthMeasureSpec) * 0.6f); } else { mMaxTabWidth = MeasureSpec.getSize(widthMeasureSpec) / 2; } } else { mMaxTabWidth = -1; } final int oldWidth = getMeasuredWidth(); super.onMeasure(widthMeasureSpec, heightMeasureSpec); final int newWidth = getMeasuredWidth(); if (lockedExpanded && oldWidth != newWidth) { // Recenter the tab display if we're at a new (scrollable) size. setCurrentItem(mSelectedTabIndex); } } private void animateToTab(final int position) { final View tabView = mTabLayout.getChildAt(position); if (mTabSelector != null) { removeCallbacks(mTabSelector); } mTabSelector = new Runnable() { @Override public void run() { final int scrollPos = tabView.getLeft() - (getWidth() - tabView.getWidth()) / 2; smoothScrollTo(scrollPos, 0); mTabSelector = null; } }; post(mTabSelector); } @Override public void onAttachedToWindow() { super.onAttachedToWindow(); if (mTabSelector != null) { // Re-post the selector we saved post(mTabSelector); } } @Override public void onDetachedFromWindow() { super.onDetachedFromWindow(); if (mTabSelector != null) { removeCallbacks(mTabSelector); } } public void addTab(int index, CharSequence text, int iconResId) { final TabView tabView = new TabView(getContext()); tabView.mIndex = index; // tabView.setFocusable(true); tabView.setOnClickListener(mTabClickListener); tabView.setText(text); if (iconResId != 0) { tabView.setCompoundDrawablesWithIntrinsicBounds(iconResId, 0, 0, 0); } mTabLayout.addView(tabView, new LinearLayout.LayoutParams(0, MATCH_PARENT, 1)); } @Override public void onPageScrollStateChanged(int arg0) { if (mListener != null) { mListener.onPageScrollStateChanged(arg0); } } @Override public void onPageScrolled(int arg0, float arg1, int arg2) { Util.Logjb("onPageSelected", "onPageSelected onPageScrolled -->" + arg0); mSelectedTabIndex2 = arg0; mOffset = arg1; invalidate(); if (mListener != null) { mListener.onPageScrolled(arg0, arg1, arg2); } } @Override public void onPageSelected(int arg0) { Util.Logjb("onPageSelected", "onPageSelected position -->" + arg0); setCurrentItem(arg0); if (mListener != null) { mListener.onPageSelected(arg0); } } @Override public void setViewPager(ViewPager view) { if (mViewPager == view) { return; } if (mViewPager != null) { mViewPager.setOnPageChangeListener(null); } final PagerAdapter adapter = view.getAdapter(); if (adapter == null) { // throw new IllegalStateException( // "ViewPager does not have adapter instance."); return; } mViewPager = view; view.setOnPageChangeListener(this); notifyDataSetChanged(); } @Override public void notifyDataSetChanged() { mTabLayout.removeAllViews(); // PagerAdapter adapter = mViewPager.getAdapter(); // final int count = adapter.getCount(); final int count = titles.size(); for (int i = 0; i < count; i++) { CharSequence title = titles.get(i); if (title == null) { title = EMPTY_TITLE; } int iconResId = 0; addTab(i, title, iconResId); } if (mSelectedTabIndex > count) { mSelectedTabIndex = count - 1; } setCurrentItem(mSelectedTabIndex); requestLayout(); } @Override public void setViewPager(ViewPager view, int initialPosition) { setViewPager(view); setCurrentItem(initialPosition); } @Override public void setCurrentItem(int item) { if (mViewPager == null) { // throw new IllegalStateException("ViewPager has not been bound."); return; } mSelectedTabIndex = item; mViewPager.setCurrentItem(item); final int tabCount = mTabLayout.getChildCount(); for (int i = 0; i < tabCount; i++) { final View child = mTabLayout.getChildAt(i); final boolean isSelected = (i == item); child.setSelected(isSelected); if (isSelected) { animateToTab(item); } } } @Override public void setOnPageChangeListener(OnPageChangeListener listener) { mListener = listener; } private class TabView extends LFrameLayout { private int mIndex; private TextView mTextView; // private LAnimView mClickView; // OnClickListener listener; public TabView(Context context) { super(context, null); mTextView = new TextView(context, null, R.attr.vpiTabPageIndicatorStyle); this.setType(MaterialStyle.TYPE_TAB_ITEM); this.setColor(0xccefff3e); this.setDelayClick(mNeedDelayClick); this.addView(mTextView); } public void setCompoundDrawablesWithIntrinsicBounds(int iconResId, int i, int j, int k) { mTextView.setCompoundDrawablesWithIntrinsicBounds(iconResId, 0, 0, 0); } public void setText(CharSequence text) { mTextView.setText(text); } // @Override // public void setOnClickListener(OnClickListener listener) { // this.listener = listener; // } @Override public void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec); // Re-measure if we went beyond our maximum size. if (mMaxTabWidth > 0 && getMeasuredWidth() > mMaxTabWidth) { super.onMeasure(MeasureSpec.makeMeasureSpec(mMaxTabWidth, MeasureSpec.EXACTLY), heightMeasureSpec); } } public int getIndex() { return mIndex; } } }