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使用ViewPager+Fragment实现选项卡切换效果

2016-04-10 21:17 561 查看

原文

http://blog.csdn.net/chdjj/article/details/21564503
主题 ViewPager

显示效果：

实现过程：

1.创建3个选项卡中的内容，即三个Fragment。

这里仅贴出其中一个：
Tab2：

package com.example.viewpagerdemo3;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Toast;

public class Tab2 extends Fragment
{
private Button but = null;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
View view = inflater.inflate(R.layout.tab2,null);//注意不要指定父视图
but = (Button) view.findViewById(R.id.but);
return view;
}
@Override
public void onActivityCreated(Bundle savedInstanceState)
{
super.onActivityCreated(savedInstanceState);
but.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
Toast.makeText(Tab2.this.getActivity(),"hahah", 0).show();
}
});
}
}

布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#00ff00"
android:orientation="vertical" >

<TextView
android:id="@+id/tab1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="我是第二个界面"
/>
<Button
android:id="@+id/but"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="我是按钮"
/>
</LinearLayout>

剩下两个Fragment类似。
2.主界面布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >
<LinearLayout
android:id="@+id/linearLayout1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#FFFFFF"
android:orientation="horizontal" >
<TextView
android:id="@+id/text1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1.0"
android:gravity="center"
android:text="页卡1"
android:textColor="#000000"
android:textSize="22.0dip" />
<TextView
android:id="@+id/text2"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1.0"
android:gravity="center"
android:text="页卡2"
android:textColor="#000000"
android:textSize="22.0dip" />
<TextView
android:id="@+id/text3"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1.0"
android:gravity="center"
android:text="页卡3"
android:textColor="#000000"
android:textSize="22.0dip" />
</LinearLayout>
<ImageView
android:id="@+id/cursor"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:scaleType="matrix"
android:src="@drawable/line" />
<android.support.v4.view.ViewPager
android:id="@+id/vPager"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:background="#000000"
android:flipInterval="30"
android:persistentDrawingCache="animation"
/>
</LinearLayout>

三个TextView代表选项卡标题，ImageView代表选项卡下的下划线。

3.实现activity。

package com.example.viewpagerdemo3;

import android.graphics.BitmapFactory;
import android.graphics.Color;
import android.graphics.Matrix;
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.DisplayMetrics;
import android.view.animation.Animation;
import android.view.animation.TranslateAnimation;
import android.widget.ImageView;
import android.widget.TextView;

public class MainActivity extends FragmentActivity
{
private ViewPager vPager = null;
/**
* 代表选项卡下的下划线的imageview
*/
private ImageView cursor = null;
/**
* 选项卡下划线长度
*/
private static int lineWidth = 0;

/**
* 偏移量
*		 （手机屏幕宽度/3-选项卡长度）/2
*/
private static int offset = 0;

/**
* 选项卡总数
*/
private static final int TAB_COUNT = 3;
/**
* 当前显示的选项卡位置
*/
private int current_index = 0;

/**
* 选项卡标题
*/
private TextView text1,text2,text3;

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

vPager = (ViewPager) findViewById(R.id.vPager);

initImageView();
text1 = (TextView) findViewById(R.id.text1);
text2 = (TextView) findViewById(R.id.text2);
text3 = (TextView) findViewById(R.id.text3);
final TextView[] titles = {text1,text2,text3};
vPager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager())
{
@Override
public int getCount()
{
return TAB_COUNT;
}

@Override
public Fragment getItem(int index)//直接创建fragment对象并返回
{
switch (index)
{
case 0:
return new Tab1();
case 1:
return new Tab2();
case 2:
return new Tab3();
}
return null;
}
});
vPager.setOnPageChangeListener(new OnPageChangeListener()
{
int one = offset * 2 + lineWidth;// 页卡1 -> 页卡2 偏移量
@Override
public void onPageSelected(int index)//设置标题的颜色以及下划线的移动效果
{
Animation animation = new TranslateAnimation(one*current_index,one*index, 0,0);
animation.setFillAfter(true);
animation.setDuration(300);
cursor.startAnimation(animation);
titles[current_index].setTextColor(Color.BLACK);
titles[index].setTextColor(Color.RED);
current_index = index;
}

@Override
public void onPageScrolled(int arg0, float arg1, int arg2)
{
}

@Override
public void onPageScrollStateChanged(int index)
{
}
});
}
private void initImageView()
{
cursor = (ImageView) findViewById(R.id.cursor);
//获取图片宽度
lineWidth = BitmapFactory.decodeResource(getResources(),R.drawable.line).getWidth();
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
//获取屏幕宽度
int screenWidth = dm.widthPixels;
Matrix matrix = new Matrix();
offset = (int) ((screenWidth/(float)TAB_COUNT - lineWidth)/2);
matrix.postTranslate(offset, 0);
//设置初始位置
cursor.setImageMatrix(matrix);
}
}

转载请标明出处：/article/1580287.html，本文出自：【张鸿洋的博客】
1、概述学习Android少不了模仿各种app的界面，自从微信6.0问世以后，就觉得微信切换时那个变色的Tab图标屌屌的，今天我就带大家自定义控件，带你变色变得飞起~~
好了，下面先看下效果图：



清晰度不太好，大家凑合看~~有木有觉得这个颜色弱爆了了的，，，下面我动动手指给你换个颜色：



有没有这个颜色比较妖一点~~~好了~下面开始介绍原理。
2、原理介绍通过上面的效果图，大家可能也猜到了，我们的图标并非是两张图片，而是一张图，并且目标颜色是可定制的，谁让现在动不动就谈个性化呢。
那么我们如何做到，可以让图标随心所遇的变色了，其实原理，在我的博客中出现了很多次了，下面你将看到一张熟悉的图：



有没有很熟悉的感脚，我们实际上还是利用了Paint的Xfermode，这次我们使用的是：Mode.DST_IN
Dst_IN回顾一下什么效果，先绘制Dst，设置Mode，再绘制Src，则显示的是先后绘图的交集区域，且是Dst.
再仔细观察下我们的图标：



为了方便大家的观看，我特意拿ps选择了一下我们图标的非透明区域，可以看到，我们这个小机器人非透明区域就是被线框起来的部分。
然后，我们图标变色的原理就出现了：
1、先绘制一个颜色（例如：粉红）
2、设置Mode=DST_IN
3、绘制我们这个可爱的小机器人
回答我，显示什么，是不是显示交集，交集是什么？交集是我们的小机器人的非透明区域，也就是那张脸，除了两个眼；
好了，那怎么变色呢？
我绘制一个颜色的时候，难道不能设置alpha么~~~
到此，大家应该已经了解了我们图标的绘制的原理了吧。
如果你对Mode不熟悉：建议移步至：Android 自定义控件实现刮刮卡效果 真的就只是刮刮卡么

3、自定义图标控件我们的整个界面不用说，是ViewPager+Fragment ，现在关注的是底部~~
接下来我们考虑，底部的Tab，Tab我们的布局是LinearLayout，内部四个View，通过设置weight达到均分~~
这个View就是我们的自定义的图标控件了，我们叫做：ChangeColorIconWithTextView
接下来考虑，应该有什么属性公布出来
1、自定义属性想了一下，我决定把图标，图标颜色，图标下显示的文字，文字大小这四个属性作为自定义属性。
那就自定义属性走起了：
a、values/attr.xml

[java] view plain copy print?<?xml version="1.0" encoding="utf-8"?>
<resources>

<attr name="icon" format="reference" />
<attr name="color" format="color" />
<attr name="text" format="string" />
<attr name="text_size" format="dimension" />

<declare-styleable name="ChangeColorIconView">
<attr name="icon" />
<attr name="color" />
<attr name="text" />
<attr name="text_size" />
</declare-styleable>

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

<attr name="icon" format="reference" />
<attr name="color" format="color" />
<attr name="text" format="string" />
<attr name="text_size" format="dimension" />

<declare-styleable name="ChangeColorIconView">
<attr name="icon" />
<attr name="color" />
<attr name="text" />
<attr name="text_size" />
</declare-styleable>

</resources>

b、在布局文件中使用

[html] view plain copy print ?<com.zhy.weixin6.ui.ChangeColorIconWithTextView
android:id="@+id/id_indicator_one"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:padding="5dp"
zhy:icon="@drawable/ic_menu_start_conversation"
zhy:text="@string/tab_weixin"
zhy:text_size="12sp" />

<com.zhy.weixin6.ui.ChangeColorIconWithTextView
android:id="@+id/id_indicator_one"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:padding="5dp"
zhy:icon="@drawable/ic_menu_start_conversation"
zhy:text="@string/tab_weixin"
zhy:text_size="12sp" />

自己注意命名空间的写法，xmlns:zhy="http://schemas.android.com/apk/res/应用的包名"。

c、在构造方法中获取

[java] view plain copy print ?

public class ChangeColorIconWithTextView extends View
{

private Bitmap mBitmap;
private Canvas mCanvas;
private Paint mPaint;
/**
* 颜色
*/
private int mColor = 0xFF45C01A;
/**
* 透明度 0.0-1.0
*/
private float mAlpha = 0f;
/**
* 图标
*/
private Bitmap mIconBitmap;
/**
* 限制绘制icon的范围
*/
private Rect mIconRect;
/**
* icon底部文本
*/
private String mText = "微信";
private int mTextSize = (int) TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_SP, 10, getResources().getDisplayMetrics());
private Paint mTextPaint;
private Rect mTextBound = new Rect();

public ChangeColorIconWithTextView(Context context)
{
super(context);
}

/**
* 初始化自定义属性值
*
* @param context
* @param attrs
*/
public ChangeColorIconWithTextView(Context context, AttributeSet attrs)
{
super(context, attrs);

// 获取设置的图标
TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.ChangeColorIconView);

int n = a.getIndexCount();
for (int i = 0; i < n; i++)
{

int attr = a.getIndex(i);
switch (attr)
{
case R.styleable.ChangeColorIconView_icon:
BitmapDrawable drawable = (BitmapDrawable) a.getDrawable(attr);
mIconBitmap = drawable.getBitmap();
break;
case R.styleable.ChangeColorIconView_color:
mColor = a.getColor(attr, 0x45C01A);
break;
case R.styleable.ChangeColorIconView_text:
mText = a.getString(attr);
break;
case R.styleable.ChangeColorIconView_text_size:
mTextSize = (int) a.getDimension(attr, TypedValue
.applyDimension(TypedValue.COMPLEX_UNIT_SP, 10,
getResources().getDisplayMetrics()));
break;

}
}

a.recycle();

mTextPaint = new Paint();
mTextPaint.setTextSize(mTextSize);
mTextPaint.setColor(0xff555555);
// 得到text绘制范围
mTextPaint.getTextBounds(mText, 0, mText.length(), mTextBound);

}

public class ChangeColorIconWithTextView extends View
{

private Bitmap mBitmap;
private Canvas mCanvas;
private Paint mPaint;
/**
* 颜色
*/
private int mColor = 0xFF45C01A;
/**
* 透明度 0.0-1.0
*/
private float mAlpha = 0f;
/**
* 图标
*/
private Bitmap mIconBitmap;
/**
* 限制绘制icon的范围
*/
private Rect mIconRect;
/**
* icon底部文本
*/
private String mText = "微信";
private int mTextSize = (int) TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_SP, 10, getResources().getDisplayMetrics());
private Paint mTextPaint;
private Rect mTextBound = new Rect();

public ChangeColorIconWithTextView(Context context)
{
super(context);
}

/**
* 初始化自定义属性值
*
* @param context
* @param attrs
*/
public ChangeColorIconWithTextView(Context context, AttributeSet attrs)
{
super(context, attrs);

// 获取设置的图标
TypedArray a = context.obtainStyledAttributes(attrs,
R.styleable.ChangeColorIconView);

int n = a.getIndexCount();
for (int i = 0; i < n; i++)
{

int attr = a.getIndex(i);
switch (attr)
{
case R.styleable.ChangeColorIconView_icon:
BitmapDrawable drawable = (BitmapDrawable) a.getDrawable(attr);
mIconBitmap = drawable.getBitmap();
break;
case R.styleable.ChangeColorIconView_color:
mColor = a.getColor(attr, 0x45C01A);
break;
case R.styleable.ChangeColorIconView_text:
mText = a.getString(attr);
break;
case R.styleable.ChangeColorIconView_text_size:
mTextSize = (int) a.getDimension(attr, TypedValue
.applyDimension(TypedValue.COMPLEX_UNIT_SP, 10,
getResources().getDisplayMetrics()));
break;

}
}

a.recycle();

mTextPaint = new Paint();
mTextPaint.setTextSize(mTextSize);
mTextPaint.setColor(0xff555555);
// 得到text绘制范围
mTextPaint.getTextBounds(mText, 0, mText.length(), mTextBound);

}

可以看到，我们在构造方法中获取了自定义的属性，并且计算了文本占据的控件存在我们的mTextBound中。

2、图标的绘制区域的选择

我们考虑下，有了属性，我们需要绘制一个文本，文本之上一个图标，我们怎么去控制绘制的区域呢？
我们的View显示区域，无非以下三种情况：

针对这三种情况，我门的图标的边长应该是什么呢？
我觉得边长应该是：控件的高度-文本的高度-内边距与控件的宽度-内边距两者的小值；大家仔细推敲一下；
好了，有了上面的边长的结论，我们就开始计算图标的绘制范围了：

[java] view plain copy print ?

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
super.onMeasure(widthMeasureSpec, heightMeasureSpec);

// 得到绘制icon的宽
int bitmapWidth = Math.min(getMeasuredWidth() - getPaddingLeft()
- getPaddingRight(), getMeasuredHeight() - getPaddingTop()
- getPaddingBottom() - mTextBound.height());

int left = getMeasuredWidth() / 2 - bitmapWidth / 2;
int top = (getMeasuredHeight() - mTextBound.height()) / 2 - bitmapWidth
/ 2;
// 设置icon的绘制范围
mIconRect = new Rect(left, top, left + bitmapWidth, top + bitmapWidth);

}

@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
super.onMeasure(widthMeasureSpec, heightMeasureSpec);

// 得到绘制icon的宽
int bitmapWidth = Math.min(getMeasuredWidth() - getPaddingLeft()
- getPaddingRight(), getMeasuredHeight() - getPaddingTop()
- getPaddingBottom() - mTextBound.height());

int left = getMeasuredWidth() / 2 - bitmapWidth / 2;
int top = (getMeasuredHeight() - mTextBound.height()) / 2 - bitmapWidth
/ 2;
// 设置icon的绘制范围
mIconRect = new Rect(left, top, left + bitmapWidth, top + bitmapWidth);

}

3、绘制图标

绘制图标有很多步骤呀，我来列一列
1、计算alpha（默认为0）
2、绘制原图
3、在绘图区域，绘制一个纯色块（设置了alpha），此步绘制在内存的bitmap上
4、设置mode，针对内存中的bitmap上的paint
5、绘制我们的图标，此步绘制在内存的bitmap上
6、绘制原文本
7、绘制设置alpha和颜色后的文本
8、将内存中的bitmap绘制出来
根据上面的步骤，可以看出来，我们的图标其实绘制了两次，为什么要绘制原图呢，因为我觉得比较好看。
3-5步骤，就是我们上面分析的原理
6-7步，是绘制文本，可以看到，我们的文本就是通过设置alpha实现的

[java] view plain copy print ?

@Override
protected void onDraw(Canvas canvas)
{

int alpha = (int) Math.ceil((255 * mAlpha));
canvas.drawBitmap(mIconBitmap, null, mIconRect, null);
setupTargetBitmap(alpha);
drawSourceText(canvas, alpha);
drawTargetText(canvas, alpha);
canvas.drawBitmap(mBitmap, 0, 0, null);

}

private void setupTargetBitmap(int alpha)
{
mBitmap = Bitmap.createBitmap(getMeasuredWidth(), getMeasuredHeight(),
Config.ARGB_8888);
mCanvas = new Canvas(mBitmap);
mPaint = new Paint();
mPaint.setColor(mColor);
mPaint.setAntiAlias(true);
mPaint.setDither(true);
mPaint.setAlpha(alpha);
mCanvas.drawRect(mIconRect, mPaint);
mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));
mPaint.setAlpha(255);
mCanvas.drawBitmap(mIconBitmap, null, mIconRect, mPaint);
}

private void drawSourceText(Canvas canvas, int alpha)
{
mTextPaint.setTextSize(mTextSize);
mTextPaint.setColor(0xff333333);
mTextPaint.setAlpha(255 - alpha);
canvas.drawText(mText, mIconRect.left + mIconRect.width() / 2
- mTextBound.width() / 2,
mIconRect.bottom + mTextBound.height(), mTextPaint);
}

private void drawTargetText(Canvas canvas, int alpha)
{
mTextPaint.setColor(mColor);
mTextPaint.setAlpha(alpha);
canvas.drawText(mText, mIconRect.left + mIconRect.width() / 2
- mTextBound.width() / 2,
mIconRect.bottom + mTextBound.height(), mTextPaint);

}

@Override
protected void onDraw(Canvas canvas)
{

int alpha = (int) Math.ceil((255 * mAlpha));
canvas.drawBitmap(mIconBitmap, null, mIconRect, null);
setupTargetBitmap(alpha);
drawSourceText(canvas, alpha);
drawTargetText(canvas, alpha);
canvas.drawBitmap(mBitmap, 0, 0, null);

}

private void setupTargetBitmap(int alpha)
{
mBitmap = Bitmap.createBitmap(getMeasuredWidth(), getMeasuredHeight(),
Config.ARGB_8888);
mCanvas = new Canvas(mBitmap);
mPaint = new Paint();
mPaint.setColor(mColor);
mPaint.setAntiAlias(true);
mPaint.setDither(true);
mPaint.setAlpha(alpha);
mCanvas.drawRect(mIconRect, mPaint);
mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));
mPaint.setAlpha(255);
mCanvas.drawBitmap(mIconBitmap, null, mIconRect, mPaint);
}

private void drawSourceText(Canvas canvas, int alpha)
{
mTextPaint.setTextSize(mTextSize);
mTextPaint.setColor(0xff333333);
mTextPaint.setAlpha(255 - alpha);
canvas.drawText(mText, mIconRect.left + mIconRect.width() / 2
- mTextBound.width() / 2,
mIconRect.bottom + mTextBound.height(), mTextPaint);
}

private void drawTargetText(Canvas canvas, int alpha)
{
mTextPaint.setColor(mColor);
mTextPaint.setAlpha(alpha);
canvas.drawText(mText, mIconRect.left + mIconRect.width() / 2
- mTextBound.width() / 2,
mIconRect.bottom + mTextBound.height(), mTextPaint);

}

关于绘制文本区域的计算，首先是起点x：mIconRect.left + mIconRect.width() / 2- mTextBound.width() / 2 有点长哈，文本mIconRect.left + mIconRect.width() / 2这个位置，在图标水平区域的中心点，这个应该没有疑问；图标水平区域的中点- mTextBound.width() / 2 开始绘制文本，是不是就是居中在图标的下面；

有人可能会问：你怎么知道文本宽度小于图标，我有5个字咋办？5个字怎么了，照样是居中显示，不信你试试~~

4、公布设置透明度的方法

到此，我们的图标控件写完了，但是还没有把我们的控制icon的方法放出去：

[java] view plain copy print ?

public void setIconAlpha(float alpha)
{
this.mAlpha = alpha;
invalidateView();
}

private void invalidateView()
{
if (Looper.getMainLooper() == Looper.myLooper())
{
invalidate();
} else
{
postInvalidate();
}
}

public void setIconAlpha(float alpha)
{
this.mAlpha = alpha;
invalidateView();
}

private void invalidateView()
{
if (Looper.getMainLooper() == Looper.myLooper())
{
invalidate();
} else
{
postInvalidate();
}
}

我们叫做setIconAlpha，避免了和setAlpha冲突，设置完成后，invalidate一下~~~

到此就真的结束了，接下来看用法。

4、实战

1、布局文件

[html] view plain copy print ?

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:zhy="http://schemas.android.com/apk/res/com.zhy.weixin6.ui"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >

<android.support.v4.view.ViewPager
android:id="@+id/id_viewpager"
android:layout_width="fill_parent"
android:layout_height="0dp"
android:layout_weight="1" >
</android.support.v4.view.ViewPager>

<LinearLayout
android:layout_width="fill_parent"
android:layout_height="60dp"
android:background="@drawable/tabbg"
android:orientation="horizontal" >

<com.zhy.weixin6.ui.ChangeColorIconWithTextView
android:id="@+id/id_indicator_one"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:padding="5dp"
zhy:icon="@drawable/ic_menu_start_conversation"
zhy:text="@string/tab_weixin"
zhy:text_size="12sp" />

<com.zhy.weixin6.ui.ChangeColorIconWithTextView
android:id="@+id/id_indicator_two"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:padding="5dp"
zhy:icon="@drawable/ic_menu_friendslist"
zhy:text="@string/tab_contact"
zhy:text_size="12sp" />

<com.zhy.weixin6.ui.ChangeColorIconWithTextView
android:id="@+id/id_indicator_three"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:padding="5dp"
zhy:icon="@drawable/ic_menu_emoticons"
zhy:text="@string/tab_find"
zhy:text_size="12sp" />

<com.zhy.weixin6.ui.ChangeColorIconWithTextView
android:id="@+id/id_indicator_four"
android:layout_width="0dp"
android:layout_height="fill_parent"
android:layout_weight="1"
android:padding="5dp"
zhy:icon="@drawable/ic_menu_allfriends"
zhy:text="@string/tab_me"
zhy:text_size="12sp" />
</LinearLayout>

</LinearLayout>

2、MainActivity

[java] view plain copy print ?

package com.zhy.weixin6.ui;

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;

import android.annotation.SuppressLint;
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.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewConfiguration;
import android.view.Window;

@SuppressLint("NewApi")
public class MainActivity extends FragmentActivity implements
OnPageChangeListener, OnClickListener
{
private ViewPager mViewPager;
private List<Fragment> mTabs = new ArrayList<Fragment>();
private FragmentPagerAdapter mAdapter;

private String[] mTitles = new String[] { "First Fragment!",
"Second Fragment!", "Third Fragment!", "Fourth Fragment!" };

private List<ChangeColorIconWithTextView> mTabIndicator = new ArrayList<ChangeColorIconWithTextView>();

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

setOverflowShowingAlways();
getActionBar().setDisplayShowHomeEnabled(false);
mViewPager = (ViewPager) findViewById(R.id.id_viewpager);

initDatas();

mViewPager.setAdapter(mAdapter);
mViewPager.setOnPageChangeListener(this);
}

private void initDatas()
{

for (String title : mTitles)
{
TabFragment tabFragment = new TabFragment();
Bundle args = new Bundle();
args.putString("title", title);
tabFragment.setArguments(args);
mTabs.add(tabFragment);
}

mAdapter = new FragmentPagerAdapter(getSupportFragmentManager())
{

@Override
public int getCount()
{
return mTabs.size();
}

@Override
public Fragment getItem(int arg0)
{
return mTabs.get(arg0);
}
};

initTabIndicator();

}

@Override
public boolean onCreateOptionsMenu(Menu menu)
{
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

private void initTabIndicator()
{
ChangeColorIconWithTextView one = (ChangeColorIconWithTextView) findViewById(R.id.id_indicator_one);
ChangeColorIconWithTextView two = (ChangeColorIconWithTextView) findViewById(R.id.id_indicator_two);
ChangeColorIconWithTextView three = (ChangeColorIconWithTextView) findViewById(R.id.id_indicator_three);
ChangeColorIconWithTextView four = (ChangeColorIconWithTextView) findViewById(R.id.id_indicator_four);

mTabIndicator.add(one);
mTabIndicator.add(two);
mTabIndicator.add(three);
mTabIndicator.add(four);

one.setOnClickListener(this);
two.setOnClickListener(this);
three.setOnClickListener(this);
four.setOnClickListener(this);

one.setIconAlpha(1.0f);
}

@Override
public void onPageSelected(int arg0)
{
}

@Override
public void onPageScrolled(int position, float positionOffset,
int positionOffsetPixels)
{
// Log.e("TAG", "position = " + position + " , positionOffset = "
// + positionOffset);

if (positionOffset > 0)
{
ChangeColorIconWithTextView left = mTabIndicator.get(position);
ChangeColorIconWithTextView right = mTabIndicator.get(position + 1);

left.setIconAlpha(1 - positionOffset);
right.setIconAlpha(positionOffset);
}

}

@Override
public void onPageScrollStateChanged(int state)
{

}

@Override
public void onClick(View v)
{

resetOtherTabs();

switch (v.getId())
{
case R.id.id_indicator_one:
mTabIndicator.get(0).setIconAlpha(1.0f);
mViewPager.setCurrentItem(0, false);
break;
case R.id.id_indicator_two:
mTabIndicator.get(1).setIconAlpha(1.0f);
mViewPager.setCurrentItem(1, false);
break;
case R.id.id_indicator_three:
mTabIndicator.get(2).setIconAlpha(1.0f);
mViewPager.setCurrentItem(2, false);
break;
case R.id.id_indicator_four:
mTabIndicator.get(3).setIconAlpha(1.0f);
mViewPager.setCurrentItem(3, false);
break;

}

}

/**
* 重置其他的Tab
*/
private void resetOtherTabs()
{
for (int i = 0; i < mTabIndicator.size(); i++)
{
mTabIndicator.get(i).setIconAlpha(0);
}
}

@Override
public boolean onMenuOpened(int featureId, Menu menu)
{
if (featureId == Window.FEATURE_ACTION_BAR && menu != null)
{
if (menu.getClass().getSimpleName().equals("MenuBuilder"))
{
try
{
Method m = menu.getClass().getDeclaredMethod(
"setOptionalIconsVisible", Boolean.TYPE);
m.setAccessible(true);
m.invoke(menu, true);
} catch (Exception e)
{
}
}
}
return super.onMenuOpened(featureId, menu);
}

private void setOverflowShowingAlways()
{
try
{
// true if a permanent menu key is present, false otherwise.
ViewConfiguration config = ViewConfiguration.get(this);
Field menuKeyField = ViewConfiguration.class
.getDeclaredField("sHasPermanentMenuKey");
menuKeyField.setAccessible(true);
menuKeyField.setBoolean(config, false);
} catch (Exception e)
{
e.printStackTrace();
}
}

}

package com.zhy.weixin6.ui;

import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;

import android.annotation.SuppressLint;
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.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewConfiguration;
import android.view.Window;

@SuppressLint("NewApi")
public class MainActivity extends FragmentActivity implements
OnPageChangeListener, OnClickListener
{
private ViewPager mViewPager;
private List<Fragment> mTabs = new ArrayList<Fragment>();
private FragmentPagerAdapter mAdapter;

private String[] mTitles = new String[] { "First Fragment!",
"Second Fragment!", "Third Fragment!", "Fourth Fragment!" };

private List<ChangeColorIconWithTextView> mTabIndicator = new ArrayList<ChangeColorIconWithTextView>();

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

setOverflowShowingAlways();
getActionBar().setDisplayShowHomeEnabled(false);
mViewPager = (ViewPager) findViewById(R.id.id_viewpager);

initDatas();

mViewPager.setAdapter(mAdapter);
mViewPager.setOnPageChangeListener(this);
}

private void initDatas()
{

for (String title : mTitles)
{
TabFragment tabFragment = new TabFragment();
Bundle args = new Bundle();
args.putString("title", title);
tabFragment.setArguments(args);
mTabs.add(tabFragment);
}

mAdapter = new FragmentPagerAdapter(getSupportFragmentManager())
{

@Override
public int getCount()
{
return mTabs.size();
}

@Override
public Fragment getItem(int arg0)
{
return mTabs.get(arg0);
}
};

initTabIndicator();

}

@Override
public boolean onCreateOptionsMenu(Menu menu)
{
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

private void initTabIndicator()
{
ChangeColorIconWithTextView one = (ChangeColorIconWithTextView) findViewById(R.id.id_indicator_one);
ChangeColorIconWithTextView two = (ChangeColorIconWithTextView) findViewById(R.id.id_indicator_two);
ChangeColorIconWithTextView three = (ChangeColorIconWithTextView) findViewById(R.id.id_indicator_three);
ChangeColorIconWithTextView four = (ChangeColorIconWithTextView) findViewById(R.id.id_indicator_four);

mTabIndicator.add(one);
mTabIndicator.add(two);
mTabIndicator.add(three);
mTabIndicator.add(four);

one.setOnClickListener(this);
two.setOnClickListener(this);
three.setOnClickListener(this);
four.setOnClickListener(this);

one.setIconAlpha(1.0f);
}

@Override
public void onPageSelected(int arg0)
{
}

@Override
public void onPageScrolled(int position, float positionOffset,
int positionOffsetPixels)
{
// Log.e("TAG", "position = " + position + " , positionOffset = "
// + positionOffset);

if (positionOffset > 0)
{
ChangeColorIconWithTextView left = mTabIndicator.get(position);
ChangeColorIconWithTextView right = mTabIndicator.get(position + 1);

left.setIconAlpha(1 - positionOffset);
right.setIconAlpha(positionOffset);
}

}

@Override
public void onPageScrollStateChanged(int state)
{

}

@Override
public void onClick(View v)
{

resetOtherTabs();

switch (v.getId())
{
case R.id.id_indicator_one:
mTabIndicator.get(0).setIconAlpha(1.0f);
mViewPager.setCurrentItem(0, false);
break;
case R.id.id_indicator_two:
mTabIndicator.get(1).setIconAlpha(1.0f);
mViewPager.setCurrentItem(1, false);
break;
case R.id.id_indicator_three:
mTabIndicator.get(2).setIconAlpha(1.0f);
mViewPager.setCurrentItem(2, false);
break;
case R.id.id_indicator_four:
mTabIndicator.get(3).setIconAlpha(1.0f);
mViewPager.setCurrentItem(3, false);
break;

}

}

/**
* 重置其他的Tab
*/
private void resetOtherTabs()
{
for (int i = 0; i < mTabIndicator.size(); i++)
{
mTabIndicator.get(i).setIconAlpha(0);
}
}

@Override
public boolean onMenuOpened(int featureId, Menu menu)
{
if (featureId == Window.FEATURE_ACTION_BAR && menu != null)
{
if (menu.getClass().getSimpleName().equals("MenuBuilder"))
{
try
{
Method m = menu.getClass().getDeclaredMethod(
"setOptionalIconsVisible", Boolean.TYPE);
m.setAccessible(true);
m.invoke(menu, true);
} catch (Exception e)
{
}
}
}
return super.onMenuOpened(featureId, menu);
}

private void setOverflowShowingAlways()
{
try
{
// true if a permanent menu key is present, false otherwise.
ViewConfiguration config = ViewConfiguration.get(this);
Field menuKeyField = ViewConfiguration.class
.getDeclaredField("sHasPermanentMenuKey");
menuKeyField.setAccessible(true);
menuKeyField.setBoolean(config, false);
} catch (Exception e)
{
e.printStackTrace();
}
}

}

Activity里面代码虽然没什么注释，但是很简单哈，就是初始化Fragment，得到我们的适配器，然后设置给ViewPager；

initTabIndicator我们初始化我们的自定义控件，以及加上了点击事件；

唯一一个需要指出的就是：
我们在onPageScrolled中，动态的获取position以及positionOffset，然后拿到左右两个View，设置positionOffset ；
这里表示下惭愧，曾经在高仿微信5.2.1主界面架构包含消息通知的onPageScrolled中写了一堆的if else，在视频上线后，也有同学立马就提出了，一行代码搞定~~
所以，我们这里简单找了下规律，已经没有if else的身影了~~~
还剩两个反射的方法，是控制Actionbar的图标的，和点击menu按键，将ActionBar的menu显示在正常区域的~~

3、TabFragment

[java] view plain copy print ?

package com.zhy.weixin6.ui; 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 { private String mTitle = "Default"; public TabFragment() { } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { if (getArguments() != null) { mTitle = getArguments().getString("title"); } TextView textView = new TextView(getActivity()); textView.setTextSize(20); textView.setBackgroundColor(Color.parseColor("#ffffffff")); textView.setGravity(Gravity.CENTER); textView.setText(mTitle); return textView; } }

package com.zhy.weixin6.ui;

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
{
private String mTitle = "Default";

public TabFragment()
{
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState)
{
if (getArguments() != null)
{
mTitle = getArguments().getString("title");
}

TextView textView = new TextView(getActivity());
textView.setTextSize(20);
textView.setBackgroundColor(Color.parseColor("#ffffffff"));
textView.setGravity(Gravity.CENTER);
textView.setText(mTitle);
return textView;
}
}

好了，到此我们的整个案例就结束了~~
大家可以在布局文件中设置各种颜色，4个不同颜色也可以，尽情的玩耍吧~~

源码点击下载

我建了一个QQ群，方便大家交流。群号：55032675----------------------------------------------------------------------------------------------------------博主部分视频已经上线，如果你不喜欢枯燥的文本，请猛戳（初录，期待您的支持）：1、Android 自定义控件实战电商活动中的刮刮卡 2、Android自定义控件实战打造Android流式布局和热门标签
3、Android智能机器人“小慕”的实现
4、高仿QQ5.0侧滑
5、高仿微信5.2.1主界面及消息提醒

Android ViewPager+RadioGroup+Fragment超高仿微信6.0底部滑动菜单,可通过左右滑动或点击底部RadioButton切换Fragment。
下载源码地址：http://download.csdn.net/download/shenyuanqing/9428333
效果图：

MainActivity.java

[java] view plain copy print ?

package com.example.administrator.wechat.activity; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.view.ViewPager; import android.widget.RadioButton; import android.widget.RadioGroup; import com.example.administrator.wechat.R; import com.example.administrator.wechat.adapter.MyFragmentPagerAdapter; import com.example.administrator.wechat.fragment.ContactsFragment; import com.example.administrator.wechat.fragment.DiscoveryFragment; import com.example.administrator.wechat.fragment.MeFragment; import com.example.administrator.wechat.fragment.ChatFragment; import java.util.ArrayList; import java.util.List; public class MainActivity extends FragmentActivity { private ViewPager viewPager; private RadioGroup radioGroup; private RadioButton rbChat, rbContacts, rbDiscovery, rbMe; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); } private void initView() { /** * RadioGroup部分 */ radioGroup = (RadioGroup) findViewById(R.id.radioGroup); rbChat = (RadioButton) findViewById(R.id.rb_chat); rbContacts = (RadioButton) findViewById(R.id.rb_contacts); rbDiscovery = (RadioButton) findViewById(R.id.rb_discovery); rbMe = (RadioButton) findViewById(R.id.rb_me); //RadioGroup选中状态改变监听 radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() { @Override public void onCheckedChanged(RadioGroup group, int checkedId) { switch (checkedId) { case R.id.rb_chat: /** * setCurrentItem第二个参数控制页面切换动画 * true:打开/false:关闭 */ viewPager.setCurrentItem(0, false); break; case R.id.rb_contacts: viewPager.setCurrentItem(1, false); break; case R.id.rb_discovery: viewPager.setCurrentItem(2, false); break; case R.id.rb_me: viewPager.setCurrentItem(3, false); break; } } }); /** * ViewPager部分 */ viewPager = (ViewPager) findViewById(R.id.viewPager); ChatFragment weChatFragment = new ChatFragment(); ContactsFragment contactsFragment = new ContactsFragment(); DiscoveryFragment discoveryFragment = new DiscoveryFragment(); MeFragment meFragment = new MeFragment(); List<Fragment> alFragment = new ArrayList<Fragment>(); alFragment.add(weChatFragment); alFragment.add(contactsFragment); alFragment.add(discoveryFragment); alFragment.add(meFragment); //ViewPager设置适配器 viewPager.setAdapter(new MyFragmentPagerAdapter(getSupportFragmentManager(), alFragment)); //ViewPager显示第一个Fragment viewPager.setCurrentItem(0); //ViewPager页面切换监听 viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() { @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } @Override public void onPageSelected(int position) { switch (position) { case 0: radioGroup.check(R.id.rb_chat); break; case 1: radioGroup.check(R.id.rb_contacts); break; case 2: radioGroup.check(R.id.rb_discovery); break; case 3: radioGroup.check(R.id.rb_me); break; } } @Override public void onPageScrollStateChanged(int state) { } }); } }

package com.example.administrator.wechat.activity;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.widget.RadioButton;
import android.widget.RadioGroup;

import com.example.administrator.wechat.R;
import com.example.administrator.wechat.adapter.MyFragmentPagerAdapter;
import com.example.administrator.wechat.fragment.ContactsFragment;
import com.example.administrator.wechat.fragment.DiscoveryFragment;
import com.example.administrator.wechat.fragment.MeFragment;
import com.example.administrator.wechat.fragment.ChatFragment;

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

public class MainActivity extends FragmentActivity {
private ViewPager viewPager;
private RadioGroup radioGroup;
private RadioButton rbChat, rbContacts, rbDiscovery, rbMe;

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

initView();
}

private void initView() {
/**
* RadioGroup部分
*/
radioGroup = (RadioGroup) findViewById(R.id.radioGroup);
rbChat = (RadioButton) findViewById(R.id.rb_chat);
rbContacts = (RadioButton) findViewById(R.id.rb_contacts);
rbDiscovery = (RadioButton) findViewById(R.id.rb_discovery);
rbMe = (RadioButton) findViewById(R.id.rb_me);
//RadioGroup选中状态改变监听
radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
switch (checkedId) {
case R.id.rb_chat:
/**
* setCurrentItem第二个参数控制页面切换动画
* true:打开/false:关闭
*/
viewPager.setCurrentItem(0, false);
break;
case R.id.rb_contacts:
viewPager.setCurrentItem(1, false);
break;
case R.id.rb_discovery:
viewPager.setCurrentItem(2, false);
break;
case R.id.rb_me:
viewPager.setCurrentItem(3, false);
break;
}
}
});

/**
* ViewPager部分
*/
viewPager = (ViewPager) findViewById(R.id.viewPager);
ChatFragment weChatFragment = new ChatFragment();
ContactsFragment contactsFragment = new ContactsFragment();
DiscoveryFragment discoveryFragment = new DiscoveryFragment();
MeFragment meFragment = new MeFragment();
List<Fragment> alFragment = new ArrayList<Fragment>();
alFragment.add(weChatFragment);
alFragment.add(contactsFragment);
alFragment.add(discoveryFragment);
alFragment.add(meFragment);
//ViewPager设置适配器
viewPager.setAdapter(new MyFragmentPagerAdapter(getSupportFragmentManager(), alFragment));
//ViewPager显示第一个Fragment
viewPager.setCurrentItem(0);
//ViewPager页面切换监听
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {

}

@Override
public void onPageSelected(int position) {
switch (position) {
case 0:
radioGroup.check(R.id.rb_chat);
break;
case 1:
radioGroup.check(R.id.rb_contacts);
break;
case 2:
radioGroup.check(R.id.rb_discovery);
break;
case 3:
radioGroup.check(R.id.rb_me);
break;
}
}

@Override
public void onPageScrollStateChanged(int state) {

}
});
}
}

activity_main.xml

[html] view plain copy print ?

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

<RadioGroup
android:id="@+id/radioGroup"
android:layout_width="match_parent"
android:layout_height="55dp"
android:layout_alignParentBottom="true"
android:background="@color/white"
android:orientation="horizontal">

<RadioButton
android:id="@+id/rb_chat"
android:checked="true"
android:text="@string/chat"
android:drawableTop="@drawable/rb_chat_selector"
style="@style/style_RadioButton"/>

<RadioButton
android:id="@+id/rb_contacts"
android:text="@string/contacts"
android:drawableTop="@drawable/rb_contacts_selector"
style="@style/style_RadioButton"/>

<RadioButton
android:id="@+id/rb_discovery"
android:text="@string/discovery"
android:drawableTop="@drawable/rb_discovery_selector"
style="@style/style_RadioButton"/>

<RadioButton
android:id="@+id/rb_me"
android:text="@string/me"
android:drawableTop="@drawable/rb_me_selector"
style="@style/style_RadioButton"/>
</RadioGroup>

<android.support.v4.view.ViewPager
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_above="@id/radioGroup" />
</RelativeLayout>

MyFragmentPagerAdapter

[java] view plain copy print ?

package com.example.administrator.wechat.adapter; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; import java.util.List; /** * Created by Administrator on 2015/6/24. */ public class MyFragmentPagerAdapter extends FragmentPagerAdapter { private List<Fragment> list; public MyFragmentPagerAdapter(FragmentManager fm, List<Fragment> list) { super(fm); this.list = list; } @Override public Fragment getItem(int position) { return list.get(position); } @Override public int getCount() { return list.size(); } }

package com.example.administrator.wechat.adapter;

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;

import java.util.List;

/**
* Created by Administrator on 2015/6/24.
*/
public class MyFragmentPagerAdapter extends FragmentPagerAdapter {
private List<Fragment> list;

public MyFragmentPagerAdapter(FragmentManager fm, List<Fragment> list) {
super(fm);
this.list = list;
}

@Override
public Fragment getItem(int position) {
return list.get(position);
}

@Override
public int getCount() {
return list.size();
}
}

style.xml

[html] view plain copy print ?

<resources>


<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">

<item name="android:colorPrimary">@color/green</item>
</style>

<style name="style_RadioButton">
<item name="android:layout_width">match_parent</item>
<item name="android:layout_height">wrap_content</item>
<item name="android:button">@null</item>
<item name="android:background">@null</item>
<item name="android:layout_weight">1</item>
<item name="android:gravity">center</item>
<item name="android:layout_gravity">center</item>
<item name="android:textColor">@drawable/rb_focus_color</item>
<item name="android:textSize">12sp</item>
</style>

</resources>

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