Android文字特效

1、概述

本篇博客的产生呢，是因为，群里的哥们暖暖给我发了个效果图，然后问我该如何实现顶部ViewPager指示器的字体变色，该效果图是这样的：

大概是今天头条的app，神奇的地方就在于，切换ViewPager页面的时候，顶部指示器改成了字体颜色的变化，个人觉得还是不错的。

那么核心的地方就是做一个支持字体这样逐渐染色就可以了，我大概想了32s，扫描了一些可能实现的方案，最终定位了一个靠谱的，下面我就带大家开始实现的征程。

实现之前贴一下我们的效果图：

2、效果图

1、简单使用

效果如上图了，关于颜失色的改变我添加了两个方向，一个是左方向，一个是有方向。

单纯的使用，可能觉得没什么意思，下面看结合ViewPager使用的一个例子。

2、结合ViewPager使用

可以看到我们切换页面的时候，上面的指示器的效果，棒棒哒~~~

当然了，学会了原理，你可以扩展，可以做个性的进度条，可以将字体变色改为背景色变色，可以把方向改为上下，太多了，自己去抠脚想把。

3、原理

看完效果图，有木有什么思路~~~花几分钟想想，因为原理很简单~~

我大致想了下，目测绘制半个字估计不行，那么就在绘制范围上下功夫，你可以全部绘制，但是我控制显示的范围，所以上述效果：

其实是绘制了两遍字体，但是呢，分别控制了绘制的显示范围，实现了逐渐变色的效果，那么对于范围的控制，有什么方便的API么，显然是有的

canvas有个clipRect的方法~~~ok，原理分析完毕~~

4、实现

说到实现，那第一步肯定又是自定义属性，我们这里的属性，需要text,textSize,textOriginColor,textChangeColor,progress，大致看一下，应该都能看出来作用吧，看不出来没事，结合下面的代码。tip:我们的View叫做ColorTrackView，感谢小七的命名。

1、自定义属性和获取

attr.xml

xml version="1.0" encoding="utf-8"?>
<resources>

    <attr name="text" format="string" />
    <attr name="text_size" format="dimension" />
    <attr name="text_origin_color" format="color|reference" />
    <attr name="text_change_color" format="color|reference" />
    <attr name="progress" format="float" />
    <attr name="direction">
        <enum name="left" value="0" />
        <enum name="right" value="1" />
    attr>

    <declare-styleable name="ColorTrackView">
        <attr name="text" />
        <attr name="text_size" />
        <attr name="text_origin_color" />
        <attr name="text_change_color" />
        <attr name="progress" />
        <attr name="direction" />
    declare-styleable>

resources>

然后在我们的ColorTrackView的构造方法中进行获取这些个渣渣属性：

/**
 *
 * @author zhy
 *
 */
public class ColorTrackView extends View
{

    private int mTextStartX;

    public enum Direction
    {
        LEFT , RIGHT ;
    }

    private int mDirection = DIRECTION_LEFT;

    private static final int  DIRECTION_LEFT = 0 ;
    private static final int  DIRECTION_RIGHT= 1 ;

    public void setDirection(int direction)
    {
        mDirection = direction;
    }

    private String mText = "张鸿洋";
    private Paint mPaint;
    private int mTextSize = sp2px(30);

    private int mTextOriginColor = 0xff000000;
    private int mTextChangeColor = 0xffff0000;

    private Rect mTextBound = new Rect();
    private int mTextWidth;

    private int mRealWidth;

    private float mProgress;

    public ColorTrackView(Context context)
    {
        super(context, null);
    }

    public ColorTrackView(Context context, AttributeSet attrs)
    {
        super(context, attrs);

        mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);

        TypedArray ta = context.obtainStyledAttributes(attrs,
                R.styleable.ColorTrackView);
        mText = ta.getString(R.styleable.ColorTrackView_text);
        mTextSize = ta.getDimensionPixelSize(
                R.styleable.ColorTrackView_text_size, mTextSize);
        mTextOriginColor = ta.getColor(
                R.styleable.ColorTrackView_text_origin_color,
                mTextOriginColor);
        mTextChangeColor = ta.getColor(
                R.styleable.ColorTrackView_text_change_color,
                mTextChangeColor);
        mProgress = ta.getFloat(R.styleable.ColorTrackView_progress, 0);

        mDirection = ta.getInt(R.styleable.ColorTrackView_direction, mDirection);

        ta.recycle();

        mPaint.setTextSize(mTextSize);
        measureText();

    }

/**
 * 
 * @author zhy
 *
 */
public class ColorTrackView extends View
{

	private int mTextStartX;
	
	public enum Direction
	{
		LEFT , RIGHT ;
	}

	private int mDirection = DIRECTION_LEFT; 
	
	private static final int  DIRECTION_LEFT = 0 ; 
	private static final int  DIRECTION_RIGHT= 1 ;
	
	public void setDirection(int direction)
	{
		mDirection = direction;
	}
	
	private String mText = "张鸿洋";
	private Paint mPaint;
	private int mTextSize = sp2px(30);

	private int mTextOriginColor = 0xff000000;
	private int mTextChangeColor = 0xffff0000;

	private Rect mTextBound = new Rect();
	private int mTextWidth;

	private int mRealWidth;

	private float mProgress;

	public ColorTrackView(Context context)
	{
		super(context, null);
	}

	public ColorTrackView(Context context, AttributeSet attrs)
	{
		super(context, attrs);

		mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);

		TypedArray ta = context.obtainStyledAttributes(attrs,
				R.styleable.ColorTrackView);
		mText = ta.getString(R.styleable.ColorTrackView_text);
		mTextSize = ta.getDimensionPixelSize(
				R.styleable.ColorTrackView_text_size, mTextSize);
		mTextOriginColor = ta.getColor(
				R.styleable.ColorTrackView_text_origin_color,
				mTextOriginColor);
		mTextChangeColor = ta.getColor(
				R.styleable.ColorTrackView_text_change_color,
				mTextChangeColor);
		mProgress = ta.getFloat(R.styleable.ColorTrackView_progress, 0);
		
		mDirection = ta.getInt(R.styleable.ColorTrackView_direction, mDirection);
		
		ta.recycle();

		mPaint.setTextSize(mTextSize);
		measureText();

	}

private void measureText()
    {
        mTextWidth = (int) mPaint.measureText(mText);
        mPaint.getTextBounds(mText, 0, mText.length(), mTextBound);
    }

private void measureText()
	{
		mTextWidth = (int) mPaint.measureText(mText);
		mPaint.getTextBounds(mText, 0, mText.length(), mTextBound);
	}
	

可以看到我同时贴出了成员变量，大家简单看下就行了，都比较简单。

获取了属性，初始化完成一些成员变量以后，那么应该走向我们的measure之旅了~~

2、onMeasure

@Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
    {
        int width = measureWidth(widthMeasureSpec);
        int height = measureHeight(heightMeasureSpec);
        setMeasuredDimension(width, height);

        mRealWidth = getMeasuredWidth() - getPaddingLeft() - getPaddingRight();
        mTextStartX = mRealWidth / 2 - mTextWidth / 2;

    }

    private int measureHeight(int measureSpec)
    {
        int mode = MeasureSpec.getMode(measureSpec);
        int val = MeasureSpec.getSize(measureSpec);
        int result = 0;
        switch (mode)
        {
        case MeasureSpec.EXACTLY:
            result = val;
            break;
        case MeasureSpec.AT_MOST:
        case MeasureSpec.UNSPECIFIED:
            result = mTextBound.height();
            break;
        }
        result = mode == MeasureSpec.AT_MOST ? Math.min(result, val) : result;
        return result + getPaddingTop() + getPaddingBottom();
    }

    private int measureWidth(int measureSpec)
    {
        int mode = MeasureSpec.getMode(measureSpec);
        int val = MeasureSpec.getSize(measureSpec);
        int result = 0;
        switch (mode)
        {
        case MeasureSpec.EXACTLY:
            result = val;
            break;
        case MeasureSpec.AT_MOST:
        case MeasureSpec.UNSPECIFIED:
            // result = mTextBound.width();
            result = mTextWidth;
            break;
        }
        result = mode == MeasureSpec.AT_MOST ? Math.min(result, val) : result;
        return result + getPaddingLeft() + getPaddingRight();
    }

@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
	{
		int width = measureWidth(widthMeasureSpec);
		int height = measureHeight(heightMeasureSpec);
		setMeasuredDimension(width, height);

		mRealWidth = getMeasuredWidth() - getPaddingLeft() - getPaddingRight();
		mTextStartX = mRealWidth / 2 - mTextWidth / 2;

	}

	private int measureHeight(int measureSpec)
	{
		int mode = MeasureSpec.getMode(measureSpec);
		int val = MeasureSpec.getSize(measureSpec);
		int result = 0;
		switch (mode)
		{
		case MeasureSpec.EXACTLY:
			result = val;
			break;
		case MeasureSpec.AT_MOST:
		case MeasureSpec.UNSPECIFIED:
			result = mTextBound.height();
			break;
		}
		result = mode == MeasureSpec.AT_MOST ? Math.min(result, val) : result;
		return result + getPaddingTop() + getPaddingBottom();
	}

	private int measureWidth(int measureSpec)
	{
		int mode = MeasureSpec.getMode(measureSpec);
		int val = MeasureSpec.getSize(measureSpec);
		int result = 0;
		switch (mode)
		{
		case MeasureSpec.EXACTLY:
			result = val;
			break;
		case MeasureSpec.AT_MOST:
		case MeasureSpec.UNSPECIFIED:
			// result = mTextBound.width();
			result = mTextWidth;
			break;
		}
		result = mode == MeasureSpec.AT_MOST ? Math.min(result, val) : result;
		return result + getPaddingLeft() + getPaddingRight();
	}

关于测量，也是比较传统的写法，根据传入的widthMeasureSpec、heightMeasureSpec，利用MeasureSpec分别获取模式和值，如何是EXACTLY万事大吉，如果是AT_MOST、UNSPECIFIED那么就进行自己测量需要的空间，当然了，最好注意如果是AT_MOST不应该大于父类传入的值。

这里提一下，如果偷懒的话，可以选择继承TextView，然后测量就不需要写了，TextView默认帮你实现了，还能利用TextView的一些属性，不过咱们这个例子比较简单，我最终还是选择了继承View，继承View有种everything under control 的感觉。

测量完成以后，不用说都是绘制了。

3、onDraw

@Override
    protected void onDraw(Canvas canvas)
    {
        super.onDraw(canvas);
        int r = (int) (mProgress* mTextWidth +mTextStartX );

        if(mDirection == DIRECTION_LEFT)
        {
            drawChangeLeft(canvas, r);
            drawOriginLeft(canvas, r);
        }else
        {
             drawOriginRight(canvas, r);
             drawChangeRight(canvas, r);
        }

    }

    private void drawChangeRight(Canvas canvas, int r)
    {
        drawText(canvas, mTextChangeColor, (int) (mTextStartX +(1-mProgress)*mTextWidth), mTextStartX+mTextWidth );
    }
    private void drawOriginRight(Canvas canvas, int r)
    {
        drawText(canvas, mTextOriginColor, mTextStartX, (int) (mTextStartX +(1-mProgress)*mTextWidth) );
    }

    private void drawChangeLeft(Canvas canvas, int r)
    {
        drawText(canvas, mTextChangeColor, mTextStartX, (int) (mTextStartX + mProgress * mTextWidth) );
    }

    private void drawOriginLeft(Canvas canvas, int r)
    {
        drawText(canvas, mTextOriginColor, (int) (mTextStartX + mProgress * mTextWidth), mTextStartX +mTextWidth );
    }

    private void drawText(Canvas canvas , int color , int startX , int endX)
    {
        mPaint.setColor(color);
        canvas.save(Canvas.CLIP_SAVE_FLAG);
        canvas.clipRect(startX, 0, endX, getMeasuredHeight());
        canvas.drawText(mText, mTextStartX, getMeasuredHeight() / 2
                + mTextBound.height() / 2, mPaint);
        canvas.restore();
    }

@Override
	protected void onDraw(Canvas canvas)
	{
		super.onDraw(canvas);
		int r = (int) (mProgress* mTextWidth +mTextStartX );
		
		if(mDirection == DIRECTION_LEFT)
		{
			drawChangeLeft(canvas, r);
			drawOriginLeft(canvas, r);
		}else
		{
			 drawOriginRight(canvas, r);
			 drawChangeRight(canvas, r);
		}

	}
	
	private void drawChangeRight(Canvas canvas, int r)
	{
		drawText(canvas, mTextChangeColor, (int) (mTextStartX +(1-mProgress)*mTextWidth), mTextStartX+mTextWidth );
	}
	private void drawOriginRight(Canvas canvas, int r)
	{
		drawText(canvas, mTextOriginColor, mTextStartX, (int) (mTextStartX +(1-mProgress)*mTextWidth) );
	}

	private void drawChangeLeft(Canvas canvas, int r)
	{
		drawText(canvas, mTextChangeColor, mTextStartX, (int) (mTextStartX + mProgress * mTextWidth) );
	}

	private void drawOriginLeft(Canvas canvas, int r)
	{
		drawText(canvas, mTextOriginColor, (int) (mTextStartX + mProgress * mTextWidth), mTextStartX +mTextWidth );
	}
	
	private void drawText(Canvas canvas , int color , int startX , int endX)
	{
		mPaint.setColor(color);
		canvas.save(Canvas.CLIP_SAVE_FLAG);
		canvas.clipRect(startX, 0, endX, getMeasuredHeight());
		canvas.drawText(mText, mTextStartX, getMeasuredHeight() / 2
				+ mTextBound.height() / 2, mPaint);
		canvas.restore();
	}

绘制的核心就在于利用mProgress和方向去计算应该clip的范围，具体的参考代码，没什么难点。有了范围以后，无非就是drawText~~~

该View的完整代码：ColorTrackView

主要的方法介绍完毕，我们就该测试了。

5、测试

1、简单测试

布局文件

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:zhy="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <com.zhy.view.ColorTrackView
        android:id="@+id/id_changeTextColorView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
        android:background="#44ff0000"
        android:padding="10dp"
        zhy:progress="0"
        zhy:text="张鸿洋"
        zhy:text_change_color="#ffff0000"
        zhy:text_origin_color="#ff000000"
        zhy:text_size="60sp" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:gravity="center"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/id_left"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:onClick="startLeftChange"
            android:text="StartLeft" />

        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_toRightOf="@id/id_left"
            android:onClick="startRightChange"
            android:text="StartRight" />
    LinearLayout>

RelativeLayout>

注意我们的自定义属性的命名空间，该布局就一个ColorTrackView，然后两个按钮来控制进度。

SimpleUseActivity:

package com.zhy.viewpagerIndicator;

import android.animation.ObjectAnimator;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;

import com.zhy.view.ColorTrackView;

public class SimpleUseActivity extends Activity
{

    ColorTrackView mView;

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_simple_main);
        mView = (ColorTrackView) findViewById(R.id.id_changeTextColorView);


    }

    @SuppressLint("NewApi")
    public void startLeftChange(View view)
    {
        mView.setDirection(0);
        ObjectAnimator.ofFloat(mView, "progress", 0, 1).setDuration(2000)
                .start();
    }

    @SuppressLint("NewApi")
    public void startRightChange(View view)
    {
        mView.setDirection(1);
        ObjectAnimator.ofFloat(mView, "progress", 0, 1).setDuration(2000)
                .start();
    }

}

package com.zhy.viewpagerIndicator;

import android.animation.ObjectAnimator;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;

import com.zhy.view.ColorTrackView;

public class SimpleUseActivity extends Activity
{

	ColorTrackView mView;

	@Override
	protected void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_simple_main);
		mView = (ColorTrackView) findViewById(R.id.id_changeTextColorView);
		

	}

	@SuppressLint("NewApi")
	public void startLeftChange(View view)
	{
		mView.setDirection(0);
		ObjectAnimator.ofFloat(mView, "progress", 0, 1).setDuration(2000)
				.start();
	}

	@SuppressLint("NewApi")
	public void startRightChange(View view)
	{
		mView.setDirection(1);
		ObjectAnimator.ofFloat(mView, "progress", 0, 1).setDuration(2000)
				.start();
	}

}

这里拿属性动画进行的测试，没有导入3.0以下兼容包，有需要自己导入。

效果图，见上效果图1。

2、结合ViewPager

布局文件：

"http://schemas.android.com/apk/res/android"
    xmlns:zhy="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >


        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:orientation="horizontal" >


            android:id="@+id/id_tab_01"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            zhy:progress="1"
            zhy:text="简介"
            zhy:text_change_color="#ffff0000"
            zhy:text_origin_color="#ff000000"
            zhy:text_size="18sp" />


            android:id="@+id/id_tab_02"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            zhy:text="评价"
            zhy:text_change_color="#ffff0000"
            zhy:text_origin_color="#ff000000"
            zhy:text_size="18sp" />


            android:id="@+id/id_tab_03"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="1"
            zhy:text="相关"
            zhy:text_change_color="#ffff0000"
            zhy:text_origin_color="#ff000000"
            zhy:text_size="18sp" />





        android:id="@+id/id_viewpager"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" >

3个ColorTrackView代表Tab,下面是ViewPager

ViewPagerUseActivity:

package com.zhy.viewpagerIndicator;

import java.util.ArrayList;
import java.util.List;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.Log;

import com.zhy.view.ColorTrackView;

public class ViewPagerUseActivity extends FragmentActivity
{
    private String[] mTitles = new String[] { "简介", "评价", "相关" };
    private ViewPager mViewPager;
    private FragmentPagerAdapter mAdapter;
    private TabFragment[] mFragments = new TabFragment[mTitles.length];
    private List mTabs = new ArrayList();

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_vp_main);

        initViews();
        initDatas();
        initEvents();
    }

    private void initEvents()
    {
        mViewPager.setOnPageChangeListener(new OnPageChangeListener()
        {
            @Override
            public void onPageSelected(int position)
            {
            }

            @Override
            public void onPageScrolled(int position, float positionOffset,
                    int positionOffsetPixels)
            {
                if (positionOffset > 0)
                {
                    ColorTrackView left = mTabs.get(position);
                    ColorTrackView right = mTabs.get(position + 1);

                    left.setDirection(1);
                    right.setDirection(0);
                    Log.e("TAG", positionOffset+"");
                    left.setProgress( 1-positionOffset);
                    right.setProgress(positionOffset);
                }
            }

            @Override
            public void onPageScrollStateChanged(int state)
            {

            }
        });

    }

    private void initDatas()
    {

        for (int i = 0; i < mTitles.length; i++)
        {
            mFragments[i] = (TabFragment) TabFragment.newInstance(mTitles[i]);
        }

        mAdapter = new FragmentPagerAdapter(getSupportFragmentManager())
        {
            @Override
            public int getCount()
            {
                return mTitles.length;
            }

            @Override
            public Fragment getItem(int position)
            {
                return mFragments[position];
            }

        };

        mViewPager.setAdapter(mAdapter);
        mViewPager.setCurrentItem(0);
    }

    private void initViews()
    {
        mViewPager = (ViewPager) findViewById(R.id.id_viewpager);

        mTabs.add((ColorTrackView) findViewById(R.id.id_tab_01));
        mTabs.add((ColorTrackView) findViewById(R.id.id_tab_02));
        mTabs.add((ColorTrackView) findViewById(R.id.id_tab_03));
    }

}

package com.zhy.viewpagerIndicator;

import java.util.ArrayList;
import java.util.List;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v4.view.ViewPager.OnPageChangeListener;
import android.util.Log;

import com.zhy.view.ColorTrackView;

public class ViewPagerUseActivity extends FragmentActivity
{
	private String[] mTitles = new String[] { "简介", "评价", "相关" };
	private ViewPager mViewPager;
	private FragmentPagerAdapter mAdapter;
	private TabFragment[] mFragments = new TabFragment[mTitles.length];
	private List mTabs = new ArrayList();

	@Override
	protected void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_vp_main);

		initViews();
		initDatas();
		initEvents();
	}

	private void initEvents()
	{
		mViewPager.setOnPageChangeListener(new OnPageChangeListener()
		{
			@Override
			public void onPageSelected(int position)
			{
			}

			@Override
			public void onPageScrolled(int position, float positionOffset,
					int positionOffsetPixels)
			{
				if (positionOffset > 0)  
		        {  
					ColorTrackView left = mTabs.get(position);  
					ColorTrackView right = mTabs.get(position + 1);  
					
					left.setDirection(1);
					right.setDirection(0);
					Log.e("TAG", positionOffset+"");
		            left.setProgress( 1-positionOffset);  
		            right.setProgress(positionOffset);  
		        }  
			}

			@Override
			public void onPageScrollStateChanged(int state)
			{

			}
		});

	}

	private void initDatas()
	{

		for (int i = 0; i < mTitles.length; i++)
		{
			mFragments[i] = (TabFragment) TabFragment.newInstance(mTitles[i]);
		}

		mAdapter = new FragmentPagerAdapter(getSupportFragmentManager())
		{
			@Override
			public int getCount()
			{
				return mTitles.length;
			}

			@Override
			public Fragment getItem(int position)
			{
				return mFragments[position];
			}

		};

		mViewPager.setAdapter(mAdapter);
		mViewPager.setCurrentItem(0);
	}

	private void initViews()
	{
		mViewPager = (ViewPager) findViewById(R.id.id_viewpager);
		
		mTabs.add((ColorTrackView) findViewById(R.id.id_tab_01));
		mTabs.add((ColorTrackView) findViewById(R.id.id_tab_02));
		mTabs.add((ColorTrackView) findViewById(R.id.id_tab_03));
	}

}

TabFragment

package com.zhy.viewpagerIndicator;

import java.util.Random;

import android.graphics.Color;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class TabFragment extends Fragment
{
    public static final String TITLE = "title";
    private String mTitle = "Defaut Value";

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        if (getArguments() != null)
        {
            mTitle = getArguments().getString(TITLE);
        }
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState)
    {
        TextView tv = new TextView(getActivity());
        tv.setTextSize(60);
        Random r = new Random();
        tv.setBackgroundColor(Color.argb(r.nextInt(120), r.nextInt(255),
                r.nextInt(255), r.nextInt(255)));
        tv.setText(mTitle);
        tv.setGravity(Gravity.CENTER);
        return tv;

    }

    public static TabFragment newInstance(String title)
    {
        TabFragment tabFragment = new TabFragment();
        Bundle bundle = new Bundle();
        bundle.putString(TITLE, title);
        tabFragment.setArguments(bundle);
        return tabFragment;
    }

}

package com.zhy.viewpagerIndicator;

import java.util.Random;

import android.graphics.Color;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class TabFragment extends Fragment
{
	public static final String TITLE = "title";
	private String mTitle = "Defaut Value";

	@Override
	public void onCreate(Bundle savedInstanceState)
	{
		super.onCreate(savedInstanceState);
		if (getArguments() != null)
		{
			mTitle = getArguments().getString(TITLE);
		}
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
			Bundle savedInstanceState)
	{
		TextView tv = new TextView(getActivity());
		tv.setTextSize(60);
		Random r = new Random();
		tv.setBackgroundColor(Color.argb(r.nextInt(120), r.nextInt(255),
				r.nextInt(255), r.nextInt(255)));
		tv.setText(mTitle);
		tv.setGravity(Gravity.CENTER);
		return tv;

	}

	public static TabFragment newInstance(String title)
	{
		TabFragment tabFragment = new TabFragment();
		Bundle bundle = new Bundle();
		bundle.putString(TITLE, title);
		tabFragment.setArguments(bundle);
		return tabFragment;
	}

}

效果图见上效果图2。