Java tutorial
/* * Copyright (C) 2013 Andreas Stuetz <andreas.stuetz@gmail.com> * * 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 pageslidingtabstrip; import android.annotation.SuppressLint; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.Paint.Style; import android.graphics.Typeface; import android.os.Build; import android.os.Parcel; import android.os.Parcelable; import android.support.v4.app.Fragment; import android.support.v4.view.ViewPager; import android.support.v4.view.ViewPager.OnPageChangeListener; import android.util.AttributeSet; import android.util.DisplayMetrics; import android.util.TypedValue; import android.view.View; import android.view.ViewTreeObserver.OnGlobalLayoutListener; import android.widget.HorizontalScrollView; import android.widget.LinearLayout; import android.widget.RelativeLayout; import android.widget.TextView; import com.example.wxq.wxqutilslibrary.R; import java.util.Calendar; import java.util.List; import java.util.Locale; import commontools.CommonTools; public class ConsumingPagerSlidingTabStrip extends HorizontalScrollView { public interface IconTabProvider { public int getPageIconResId(int position); } // @formatter:off private static final int[] ATTRS = new int[] { android.R.attr.textSize, android.R.attr.textColor }; // @formatter:on private LinearLayout.LayoutParams defaultTabLayoutParams; private LinearLayout.LayoutParams expandedTabLayoutParams; private final PageListener pageListener = new PageListener(); public OnPageChangeListener delegatePageListener; private LinearLayout tabsContainer; private ViewPager pager; private OnTabClickListener onTabClickListener; private int tabCount; private int currentPosition = 0; private float currentPositionOffset = 0f; private Paint rectPaint; private Paint dividerPaint; private int indicatorColor = 0xffffff;// ................... private int underlineColor = 0xffa500;// .................... private int dividerColor = 0x1A000000; private boolean shouldExpand = false; private boolean textAllCaps = false; private int scrollOffset = 52; private int indicatorHeight = 8; private int underlineHeight = 2; private int dividerPadding = 12; private int tabPadding = 0;// ..................... private int dividerWidth = 1; private int tabTextSize = 16; private int tabTextColor = 0x4C73F5;// ................... private Typeface tabTypeface = null; private int tabTypefaceStyle = 0; private boolean isShowLine = false;//true? private boolean isShowUnderLine = true;//? private int lastScrollX = 0; private int tabBackgroundResId = 0; // private int tabBackgroundResId = R.drawable.background_tab; private Locale locale; private boolean isDoubleTab = false;//?tab private int curPosition = 0; private int tabDefaultColor = getResources().getColor(R.color.main_color), tabSelectedColor = getResources().getColor(R.color.grey); private int iconShowDirection = -1; private final int LEFT = 0; private final int RIGHT = 1; private int[] positions = null; private int[] iconIds = null; private Context context; public ConsumingPagerSlidingTabStrip(Context context) { this(context, null); } public ConsumingPagerSlidingTabStrip(Context context, AttributeSet attrs) { this(context, attrs, 0); } @SuppressWarnings("ResourceType") public ConsumingPagerSlidingTabStrip(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); this.context = context; setFillViewport(true); setWillNotDraw(false); tabsContainer = new LinearLayout(context); tabsContainer.setMotionEventSplittingEnabled(false); tabsContainer.setOrientation(LinearLayout.HORIZONTAL); tabsContainer.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT)); addView(tabsContainer); DisplayMetrics dm = getResources().getDisplayMetrics(); scrollOffset = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, scrollOffset, dm); indicatorHeight = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, indicatorHeight, dm); underlineHeight = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, underlineHeight, dm); dividerPadding = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dividerPadding, dm); tabPadding = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, tabPadding, dm); dividerWidth = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dividerWidth, dm); tabTextSize = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, tabTextSize, dm); // get system attrs (android:textSize and android:textColor) TypedArray a = context.obtainStyledAttributes(attrs, ATTRS); tabTextSize = a.getDimensionPixelSize(0, tabTextSize); tabTextColor = a.getColor(1, tabTextColor); a.recycle(); // get custom attrs a = context.obtainStyledAttributes(attrs, R.styleable.PagerSlidingTabStrip); iconShowDirection = a.getInt(R.styleable.PagerSlidingTabStrip_pstsShowIconDirection, -1); indicatorColor = a.getColor(R.styleable.PagerSlidingTabStrip_pstsIndicatorColor, indicatorColor); underlineColor = a.getColor(R.styleable.PagerSlidingTabStrip_pstsUnderlineColor, underlineColor); dividerColor = a.getColor(R.styleable.PagerSlidingTabStrip_pstsDividerColor, dividerColor); indicatorHeight = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsIndicatorHeight, indicatorHeight); underlineHeight = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsUnderlineHeight, underlineHeight); dividerPadding = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsDividerPadding, dividerPadding); tabPadding = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsTabPaddingLeftRight, tabPadding); tabBackgroundResId = a.getResourceId(R.styleable.PagerSlidingTabStrip_pstsTabBackground, tabBackgroundResId); shouldExpand = a.getBoolean(R.styleable.PagerSlidingTabStrip_pstsShouldExpand, shouldExpand); scrollOffset = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsScrollOffset, scrollOffset); textAllCaps = a.getBoolean(R.styleable.PagerSlidingTabStrip_pstsTextAllCaps, textAllCaps); tabDefaultColor = a.getColor(R.styleable.PagerSlidingTabStrip_pstsTabDefaultColor, tabDefaultColor); tabSelectedColor = a.getColor(R.styleable.PagerSlidingTabStrip_pstsTabSelectedColor, tabSelectedColor); tabTextSize = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsTabTextSize, tabTextSize); isShowLine = a.getBoolean(R.styleable.PagerSlidingTabStrip_pstsShowLine, isShowLine); isDoubleTab = a.getBoolean(R.styleable.PagerSlidingTabStrip_pstsDoubleTab, isDoubleTab); isShowUnderLine = a.getBoolean(R.styleable.PagerSlidingTabStrip_pstsShowUnderLine, isShowUnderLine); a.recycle(); rectPaint = new Paint(); rectPaint.setAntiAlias(true); rectPaint.setStyle(Style.FILL); dividerPaint = new Paint(); dividerPaint.setAntiAlias(true); dividerPaint.setStrokeWidth(dividerWidth); defaultTabLayoutParams = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT); expandedTabLayoutParams = new LinearLayout.LayoutParams(0, LayoutParams.MATCH_PARENT, 1.0f); if (locale == null) { locale = getResources().getConfiguration().locale; } } public void setViewPager(ViewPager pager) { this.pager = pager; if (pager.getAdapter() == null) { throw new IllegalStateException("ViewPager does not have adapter instance."); } pager.addOnPageChangeListener(pageListener); notifyDataSetChanged(); } public ViewPager getViewPager() { return pager; } public void setOnPageChangeListener(OnPageChangeListener listener) { this.delegatePageListener = listener; } public void setOnTabClickListener(OnTabClickListener drawableRight) { this.onTabClickListener = drawableRight; } public void notifyDataSetChanged() { tabsContainer.removeAllViews(); tabCount = pager.getAdapter().getCount(); for (int i = 0; i < tabCount; i++) { if (pager.getAdapter() instanceof IconTabProvider) { // addIconTab(i, // ((IconTabProvider) pager.getAdapter()) // .getPageIconResId(i)); } else { addTextTab(i, pager.getAdapter().getPageTitle(i).toString()); } } updateTabStyles(); getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() { @SuppressWarnings("deprecation") @SuppressLint("NewApi") @Override public void onGlobalLayout() { if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) { getViewTreeObserver().removeGlobalOnLayoutListener(this); } else { getViewTreeObserver().removeOnGlobalLayoutListener(this); } currentPosition = pager.getCurrentItem(); scrollToChild(currentPosition, 0); } }); } private void addTextTab(final int position, String title) { if (!isDoubleTab) { View v = View.inflate(getContext(), R.layout.tab_desc, null); TextView text = (TextView) v.findViewById(R.id.text); if (iconShowDirection != -1 && positions != null && iconIds != null && positions.length == iconIds.length) { for (int index : positions) { if (index == position) { if (iconShowDirection == LEFT) { text.setCompoundDrawablesWithIntrinsicBounds(iconIds[index], 0, 0, 0); } else { text.setCompoundDrawablesWithIntrinsicBounds(0, 0, iconIds[index], 0); } text.setCompoundDrawablePadding(CommonTools.dip2px(context, 5)); break; } } } text.setText(title); addTab(position, v); } else { View view = View.inflate(getContext(), R.layout.layout_text_tab, null); TextView classname = (TextView) view.findViewById(R.id.classname); TextView schoolname = (TextView) view.findViewById(R.id.schoolname); if (title.contains(";")) { String[] strs = title.split(";"); schoolname.setText(strs[0]); classname.setText(strs[1]); addTab(position, view); } else { classname.setText(title.substring(0, title.indexOf("("))); schoolname.setText(title.substring(title.indexOf("(") + 1, title.indexOf(")"))); addTab(position, view); } } } public interface OnTabClickListener { void onTabclick(View v, int position); } public static final int MIN_CLICK_DELAY_TIME = 1000;//? private long lastClickTime = 0; private void addTab(final int position, View tab) { tab.setFocusable(true); tab.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { long currentTime = Calendar.getInstance().getTimeInMillis(); if (currentTime - lastClickTime > MIN_CLICK_DELAY_TIME) { lastClickTime = currentTime; if (onTabClickListener != null) { onTabClickListener.onTabclick(v, position); } pager.setCurrentItem(position); } } }); // tab.setOnClickListener(new NoDoubleClickListener(onTabClickListener,position,pager)); setShouldExpand(true);// weight=1f if (position == pager.getCurrentItem()) { if (isDoubleTab) { ((TextView) (tab.findViewById(R.id.classname))).setTextColor(tabSelectedColor); } else { ((TextView) tab.findViewById(R.id.text)).setTextColor(tabSelectedColor); } } else { if (isDoubleTab) { ((TextView) (tab.findViewById(R.id.classname))).setTextColor(tabDefaultColor); } else { ((TextView) tab.findViewById(R.id.text)).setTextColor(tabDefaultColor); } } tabsContainer.addView(tab, position, shouldExpand ? expandedTabLayoutParams : defaultTabLayoutParams); } private void updateTabStyles() { for (int i = 0; i < tabCount; i++) { View v = tabsContainer.getChildAt(i); v.setBackgroundResource(tabBackgroundResId); if (v instanceof RelativeLayout) { TextView tab = (TextView) v.findViewById(R.id.text); tab.setTextSize(TypedValue.COMPLEX_UNIT_PX, tabTextSize); tab.setTypeface(tabTypeface, tabTypefaceStyle); if (textAllCaps) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) { tab.setAllCaps(true); } else { tab.setText(tab.getText().toString().toUpperCase(locale)); } } } else { TextView classname = (TextView) v.findViewById(R.id.classname); TextView schoolname = (TextView) v.findViewById(R.id.schoolname); classname.setTextSize(TypedValue.COMPLEX_UNIT_PX, tabTextSize); classname.setTypeface(tabTypeface, tabTypefaceStyle); schoolname.setTextSize(TypedValue.COMPLEX_UNIT_PX, tabTextSize); schoolname.setTypeface(tabTypeface, tabTypefaceStyle); if (textAllCaps) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH) { classname.setAllCaps(true); schoolname.setAllCaps(true); } else { classname.setText(classname.getText().toString().toUpperCase(locale)); schoolname.setText(schoolname.getText().toString().toUpperCase(locale)); } } } } } private void scrollToChild(int position, int offset) { if (tabCount == 0) { return; } int newScrollX = tabsContainer.getChildAt(position).getLeft() + offset; if (position > 0 || offset > 0) { newScrollX -= scrollOffset; } if (newScrollX != lastScrollX) { lastScrollX = newScrollX; scrollTo(newScrollX, 0); } } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); if (isInEditMode() || tabCount == 0) { return; } final int height = getHeight(); rectPaint.setColor(indicatorColor); // default: line below current tab View currentTab = tabsContainer.getChildAt(currentPosition); float lineLeft = currentTab.getLeft(); float lineRight = currentTab.getRight(); int tabwidth = 0; if (isShowLine) { tabwidth = currentTab.getPaddingLeft(); } // if there is an offset, start interpolating left and right coordinates // between current and next tab if (isShowUnderLine) { if (currentPositionOffset > 0f && currentPosition < tabCount - 1) { View nextTab = tabsContainer.getChildAt(currentPosition + 1); final float nextTabLeft = nextTab.getLeft(); final float nextTabRight = nextTab.getRight(); lineLeft = (currentPositionOffset * nextTabLeft + (1f - currentPositionOffset) * lineLeft); lineRight = (currentPositionOffset * nextTabRight + (1f - currentPositionOffset) * lineRight); } canvas.drawRect(lineLeft + tabwidth, height - indicatorHeight, lineRight - tabwidth, height, rectPaint); // draw underline rectPaint.setColor(underlineColor); canvas.drawRect(0, height - underlineHeight, tabsContainer.getWidth(), height, rectPaint); } // draw divider dividerPaint.setColor(dividerColor); if (isShowLine) { for (int i = 0; i < tabCount - 1; i++) { View tab = tabsContainer.getChildAt(i); canvas.drawLine(tab.getRight(), dividerPadding, tab.getRight(), height - dividerPadding, dividerPaint); } } } private List<Fragment> fragments; // ?FragmentPage public void addFragmentsLsit(List<Fragment> list) { this.fragments = list; } private class PageListener implements OnPageChangeListener { @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { currentPosition = position; currentPositionOffset = positionOffset; if (position > 1) { scrollToChild(position, (int) (positionOffset * tabsContainer.getChildAt(position).getWidth())); } invalidate(); if (delegatePageListener != null) { delegatePageListener.onPageScrolled(position, positionOffset, positionOffsetPixels); } } @Override public void onPageScrollStateChanged(int state) { if (state == ViewPager.SCROLL_STATE_IDLE) { scrollToChild(pager.getCurrentItem(), 0); } if (delegatePageListener != null) { delegatePageListener.onPageScrollStateChanged(state); } } @Override public void onPageSelected(int position) { setColor(position); if (fragments != null && !fragments.isEmpty()) { if (fragments.get(position).isAdded()) { //??????????????????? // fragments.get(position).stateUpdate(); } } if (delegatePageListener != null) { delegatePageListener.onPageSelected(position); } } } /** * tab * * @param position */ public void setColor(int position) { if (position != curPosition) { if (isDoubleTab) { View view = tabsContainer.getChildAt(position); TextView tv = (TextView) view.findViewById(R.id.classname); View curView = tabsContainer.getChildAt(curPosition); TextView curTv = (TextView) curView.findViewById(R.id.classname); tv.setTextColor(tabSelectedColor); curTv.setTextColor(tabDefaultColor); } else { TextView tv = (TextView) tabsContainer.getChildAt(position).findViewById(R.id.text); TextView curTv = (TextView) tabsContainer.getChildAt(curPosition).findViewById(R.id.text); tv.setTextColor(tabSelectedColor); curTv.setTextColor(tabDefaultColor); } curPosition = position; } } public void showOrHideRedPoint(boolean isShow, int position) { if (!isDoubleTab && tabsContainer != null) { if (tabsContainer.getChildCount() > position) { View view = tabsContainer.getChildAt(position).findViewById(R.id.redpoint); view.setVisibility(isShow ? VISIBLE : INVISIBLE); invalidate(); } } } public void setIconShowDirection(int iconShowDirection) { this.iconShowDirection = iconShowDirection; } public void setIndicatorColor(int indicatorColor) { this.indicatorColor = indicatorColor; invalidate(); } public void setIndicatorColorResource(int resId) { this.indicatorColor = getResources().getColor(resId); invalidate(); } public void setPositions(int[] positions) { this.positions = positions; } public int getIndicatorColor() { return this.indicatorColor; } public void setIndicatorHeight(int indicatorLineHeightPx) { this.indicatorHeight = indicatorLineHeightPx; invalidate(); } public int getIndicatorHeight() { return indicatorHeight; } public void setUnderlineColor(int underlineColor) { this.underlineColor = underlineColor; invalidate(); } public void setUnderlineColorResource(int resId) { this.underlineColor = getResources().getColor(resId); invalidate(); } public int getUnderlineColor() { return underlineColor; } public void setDividerColor(int dividerColor) { this.dividerColor = dividerColor; invalidate(); } public void setDividerColorResource(int resId) { this.dividerColor = getResources().getColor(resId); invalidate(); } public int getDividerColor() { return dividerColor; } public void setUnderlineHeight(int underlineHeightPx) { this.underlineHeight = underlineHeightPx; invalidate(); } public int getUnderlineHeight() { return underlineHeight; } public void setDividerPadding(int dividerPaddingPx) { this.dividerPadding = dividerPaddingPx; invalidate(); } public int getDividerPadding() { return dividerPadding; } public void setScrollOffset(int scrollOffsetPx) { this.scrollOffset = scrollOffsetPx; invalidate(); } public int getScrollOffset() { return scrollOffset; } public void setShouldExpand(boolean shouldExpand) { this.shouldExpand = shouldExpand; requestLayout(); } public boolean getShouldExpand() { return shouldExpand; } public boolean isTextAllCaps() { return textAllCaps; } public void setAllCaps(boolean textAllCaps) { this.textAllCaps = textAllCaps; } public void setTextSize(int textSizePx) { this.tabTextSize = textSizePx; updateTabStyles(); } public int getTextSize() { return tabTextSize; } public void setTextColor(int textColor) { this.tabTextColor = textColor; updateTabStyles(); } public void setTextColorResource(int resId) { this.tabTextColor = getResources().getColor(resId); updateTabStyles(); } public int getTextColor() { return tabTextColor; } public void setTypeface(Typeface typeface, int style) { this.tabTypeface = typeface; this.tabTypefaceStyle = style; updateTabStyles(); } public void setTabBackground(int resId) { this.tabBackgroundResId = resId; } public int getTabBackground() { return tabBackgroundResId; } public void setTabPaddingLeftRight(int paddingPx) { this.tabPadding = paddingPx; updateTabStyles(); } public int getTabPaddingLeftRight() { return tabPadding; } public void setIsShowLine(boolean isShowLine) { this.isShowLine = isShowLine; } public void setIsDoubleTab(boolean isDoubleTab) { this.isDoubleTab = isDoubleTab; } public void setTabDefaultColor(int tabDefaultColor) { this.tabDefaultColor = tabDefaultColor; } public void setTabSelectedColor(int tabSelectedColor) { this.tabSelectedColor = tabSelectedColor; } public void setIsShowUnderLine(boolean isShowUnderLine) { this.isShowUnderLine = isShowUnderLine; } public void setIconIds(int[] iconIds) { this.iconIds = iconIds; } @Override public void onRestoreInstanceState(Parcelable state) { if (state instanceof SavedState) { SavedState savedState = (SavedState) state; super.onRestoreInstanceState(savedState.getSuperState()); currentPosition = savedState.currentPosition; requestLayout(); } else { super.onRestoreInstanceState(state); } } @Override public Parcelable onSaveInstanceState() { Parcelable superState = super.onSaveInstanceState(); SavedState savedState = new SavedState(superState); savedState.currentPosition = currentPosition; return savedState; } static class SavedState extends BaseSavedState { int currentPosition; public SavedState(Parcelable superState) { super(superState); } private SavedState(Parcel in) { super(in); currentPosition = in.readInt(); } @Override public void writeToParcel(Parcel dest, int flags) { super.writeToParcel(dest, flags); dest.writeInt(currentPosition); } public static final Creator<SavedState> CREATOR = new Creator<SavedState>() { @Override public SavedState createFromParcel(Parcel in) { return new SavedState(in); } @Override public SavedState[] newArray(int size) { return new SavedState[size]; } }; } }