package com.jiuqi.njt.register; import java.util.List; import com.jiuqi.njt.R; import com.jiuqi.njt.util.ActivityUtil; import android.annotation.SuppressLint; import android.annotation.TargetApi; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.CornerPathEffect; import android.graphics.Matrix; import android.graphics.Paint; import android.graphics.Paint.Style; import android.graphics.Path; import android.graphics.RectF; import android.os.Build; import android.support.v4.view.ViewPager; import android.support.v4.view.ViewPager.OnPageChangeListener; import android.util.AttributeSet; import android.util.DisplayMetrics; import android.util.Log; import android.util.TypedValue; import android.view.Gravity; import android.view.View; import android.view.WindowManager; import android.widget.LinearLayout; import android.widget.TextView; /** * http://blog.csdn.net/lmj623565791/article/details/42160391 * @author zhy * */ @TargetApi(Build.VERSION_CODES.FROYO) public class ViewPagerIndicator extends LinearLayout { /** * 绘制三角形的画笔 */ private Paint mPaint; /** * path构成一个三角形 */ private Path mPath; /** * 三角形的宽度 */ private int mTriangleWidth; /** * 三角形的高度 */ private int mTriangleHeight; /** * 三角形的宽度为单个Tab的1/6 */ private static final float RADIO_TRIANGEL = 1.0f / 6; /** * 三角形的最大宽度 */ private final int DIMENSION_TRIANGEL_WIDTH = (int) (getScreenWidth() / 3 * RADIO_TRIANGEL); /** * 初始时,三角形指示器的偏移量 */ private int mInitTranslationX; /** * 手指滑动时的偏移量 */ private float mTranslationX; /** * 默认的Tab数量 */ private static final int COUNT_DEFAULT_TAB = 4; /** * tab数量 */ private int mTabVisibleCount = COUNT_DEFAULT_TAB; /** * tab上的内容 */ private List<String> mTabTitles; /** * 与之绑定的ViewPager */ public ViewPager mViewPager; private Context context; /** * 标题正常时的颜色 */ // private static final int COLOR_TEXT_NORMAL = 0x77FFFFFF; private static final int COLOR_TEXT_NORMAL = Color.parseColor("#6a6a6a"); /** * 标题选中时的颜色 */ private static final int COLOR_TEXT_HIGHLIGHTCOLOR = 0xFFFFFFFF; int dateheight = 0; int width = 0; public ViewPagerIndicator(Context context) { this(context, null); Log.wtf("dateheight", dateheight+""); dateheight=ActivityUtil.getWindowDateHeight(context); width = ActivityUtil.getWindowWidth(context); } public ViewPagerIndicator(Context context, AttributeSet attrs) { super(context, attrs); this.context = context; // 获得自定义属性,tab的数量 TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.ViewPagerIndicator); mTabVisibleCount = a.getInt(R.styleable.ViewPagerIndicator_item_count, COUNT_DEFAULT_TAB); if (mTabVisibleCount < 0) mTabVisibleCount = COUNT_DEFAULT_TAB; a.recycle(); // 初始化画笔 mPaint = new Paint(); mPaint.setAntiAlias(true); mPaint.setColor(Color.parseColor("#8Ffc8c02")); mPaint.setStyle(Style.FILL); // mPaint.setStyle(Paint.Style.STROKE);//设置空心 mPaint.setPathEffect(new CornerPathEffect(3)); } /** * 绘制指示器 */ @SuppressLint("NewApi") @Override protected void dispatchDraw(Canvas canvas) { super.dispatchDraw(canvas); canvas.save(); // 画笔平移到正确的位置 canvas.translate(mInitTranslationX + mTranslationX, getHeight() /2); Log.e("------------------", "mInitTranslationX"+mInitTranslationX+"==="+getHeight()); dateheight=ActivityUtil.getWindowDateHeight(context); Log.e("??", ""+dateheight/3); // canvas.drawPath(mPath, mPaint); RectF rect = new RectF(-mInitTranslationX*3/4,-dateheight/3 , mInitTranslationX*1.4f*3/4,dateheight/3); canvas.drawRoundRect(rect, dateheight/3, //x轴的半径 dateheight/3, //y轴的半径 mPaint); Matrix matrix = new Matrix(); float aa = (float)(getHeight()); matrix.setTranslate(0, getHeight()/2); // matrix.setScale(0, -200); canvas.setMatrix(matrix); // canvas.translate(0, getHeight()/2); // canvas.drawCircle(10,-45, 50, mPaint); // Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher); // canvas.drawBitmap(bitmap , new Matrix(), mPaint); canvas.restore(); } /** * 初始化三角形的宽度 */ @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); mTriangleWidth = (int) (w / mTabVisibleCount * RADIO_TRIANGEL);// 1/6 of // width mTriangleWidth = Math.min(DIMENSION_TRIANGEL_WIDTH, mTriangleWidth); // 初始化三角形 initTriangle(); // 初始时的偏移量 mInitTranslationX = getWidth() / mTabVisibleCount / 2 - mTriangleWidth / 2; } /** * 设置可见的tab的数量 * * @param count */ public void setVisibleTabCount(int count) { this.mTabVisibleCount = count; } /** * 设置tab的标题内容 可选,可以自己在布局文件中写死 * * @param datas */ public void setTabItemTitles(List<String> datas) { // 如果传入的list有值,则移除布局文件中设置的view if (datas != null && datas.size() > 0) { this.removeAllViews(); this.mTabTitles = datas; for (String title : mTabTitles) { // 添加view addView(generateTextView(title)); } // 设置item的click事件 setItemClickEvent(); } } /** * 对外的ViewPager的回调接口 * * @author zhy * */ public interface PageChangeListener { public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels); public void onPageSelected(int position); public void onPageScrollStateChanged(int state); } // 对外的ViewPager的回调接口 private PageChangeListener onPageChangeListener; // 对外的ViewPager的回调接口的设置 public void setOnPageChangeListener(PageChangeListener pageChangeListener) { this.onPageChangeListener = pageChangeListener; } // 设置关联的ViewPager public void setViewPager(ViewPager mViewPager, int pos) { this.mViewPager = mViewPager; mViewPager.setOnPageChangeListener(new OnPageChangeListener() { @Override public void onPageSelected(int position) { // 设置字体颜色高亮 resetTextViewColor(); highLightTextView(position); // 回调 if (onPageChangeListener != null) { onPageChangeListener.onPageSelected(position); } } @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { // 滚动 scroll(position, positionOffset); // 回调 if (onPageChangeListener != null) { onPageChangeListener.onPageScrolled(position, positionOffset, positionOffsetPixels); } } @Override public void onPageScrollStateChanged(int state) { // 回调 if (onPageChangeListener != null) { onPageChangeListener.onPageScrollStateChanged(state); } } }); // 设置当前页 mViewPager.setCurrentItem(pos); // 高亮 highLightTextView(pos); } /** * 高亮文本 * * @param position */ protected void highLightTextView(int position) { View view = getChildAt(position); if (view instanceof TextView) { // ((TextView) view).setTextColor(COLOR_TEXT_HIGHLIGHTCOLOR); } } /** * 重置文本颜色 */ private void resetTextViewColor() { for (int i = 0; i < getChildCount(); i++) { View view = getChildAt(i); if (view instanceof TextView) { ((TextView) view).setTextColor(COLOR_TEXT_NORMAL); } } } /** * 设置点击事件 */ public void setItemClickEvent() { int cCount = getChildCount(); for (int i = 0; i < cCount; i++) { final int j = i; View view = getChildAt(i); view.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { mViewPager.setCurrentItem(j); } }); } } /** * 根据标题生成我们的TextView * * @param text * @return */ private TextView generateTextView(String text) { TextView tv = new TextView(getContext()); LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams( LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT); lp.width = getScreenWidth() / mTabVisibleCount; tv.setGravity(Gravity.CENTER); tv.setTextColor(COLOR_TEXT_NORMAL); tv.setText(text); tv.setTextSize(TypedValue.COMPLEX_UNIT_SP, 16); tv.setLayoutParams(lp); return tv; } /** * 初始化三角形指示器 */ private void initTriangle() { mPath = new Path(); mTriangleHeight = (int) (mTriangleWidth / 2 / Math.sqrt(2)); mPath.moveTo(0, 0); mPath.lineTo(mTriangleWidth, 0); mPath.lineTo(mTriangleWidth / 2, -mTriangleHeight); mPath.close(); // mPath=new Path(); // mPath.moveTo(18, 20); // mPath.lineTo(20, 20); // mPath.lineTo(21, 21); // mPath.lineTo(20, 22); // mPath.lineTo(18, 22); // mPath.lineTo(17, 21); // mPath.close();//封闭 } /** * 指示器跟随手指滚动,以及容器滚动 * * @param position * @param offset */ public void scroll(int position, float offset) { /** * <pre> * 0-1:position=0 ;1-0:postion=0; * </pre> */ // 不断改变偏移量,invalidate mTranslationX = getWidth() / mTabVisibleCount * (position + offset); int tabWidth = getScreenWidth() / mTabVisibleCount; // 容器滚动,当移动到倒数最后一个的时候,开始滚动 if (offset > 0 && position >= (mTabVisibleCount - 2) && getChildCount() > mTabVisibleCount) { if (mTabVisibleCount != 1) { this.scrollTo((position - (mTabVisibleCount - 2)) * tabWidth + (int) (tabWidth * offset), 0); } else // 为count为1时 的特殊处理 { this.scrollTo( position * tabWidth + (int) (tabWidth * offset), 0); } } invalidate(); } /** * 设置布局中view的一些必要属性;如果设置了setTabTitles,布局中view则无效 */ @Override protected void onFinishInflate() { Log.e("TAG", "onFinishInflate"); super.onFinishInflate(); int cCount = getChildCount(); if (cCount == 0) return; for (int i = 0; i < cCount; i++) { View view = getChildAt(i); LinearLayout.LayoutParams lp = (LayoutParams) view .getLayoutParams(); lp.weight = 0; lp.width = getScreenWidth() / mTabVisibleCount; view.setLayoutParams(lp); } // 设置点击事件 setItemClickEvent(); } /** * 获得屏幕的宽度 * * @return */ public int getScreenWidth() { WindowManager wm = (WindowManager) getContext().getSystemService( Context.WINDOW_SERVICE); DisplayMetrics outMetrics = new DisplayMetrics(); wm.getDefaultDisplay().getMetrics(outMetrics); return outMetrics.widthPixels; } }