微信6.0主界面

1.效果图

2.知识点

(1)ActionBar的使用

(2)底部渐变色

3.actionbar

(1)menu /main.xml

<menu xmlns:android="http://schemas.android.com/apk/res/android" >

    <item
        android:id="@+id/action_search"
        android:actionViewClass="android.widget.SearchView"
        android:icon="@drawable/actionbar_search_icon"
        android:showAsAction="ifRoom|collapseActionView"
        android:title="@string/action_search"/>
 
    <item
        android:id="@+id/action_group_chat"
        android:icon="@drawable/menu_group_chat_icon"
        android:title="@string/menu_group_chat"/>
    <item
        android:id="@+id/action_add_friend"
        android:icon="@drawable/menu_add_icon"
        android:title="@string/menu_addfriend"/>
    <item
        android:id="@+id/action_scan"
        android:icon="@drawable/men_scan_icon"
        android:title="@string/menu_scan"/>
    <item
        android:id="@+id/action_feedback"
        android:icon="@drawable/menu_feedback_icon"
        android:title="@string/menu_feedback"/>

</menu>

(2)详情：http://blog.youkuaiyun.com/u012759878/article/details/44780091

                 http://www.2cto.com/kf/201503/380578.html

4.自定义view,底部渐变图标

(1).自定义View步骤

(2)attr.xml

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

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

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

</resources>

1.ChangeColorIconWithText

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.Xfermode;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.os.Looper;
import android.os.Parcelable;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.View;
/*
0.初始化变量
1.获取测量的范围    onmeause();
**/
public class ChangeColorIconWithText extends View
{

	private int mColor = 0xFF45C01A;
	private Bitmap mIconBitmap;
	private String mText = "微信";
	private int mTextSize = (int) TypedValue.applyDimension(
			TypedValue.COMPLEX_UNIT_SP, 12, getResources().getDisplayMetrics());

	private Canvas mCanvas;
	private Bitmap mBitmap;
	private Paint mPaint;

	private float mAlpha;//透明度

	private Rect mIconRect;
	private Rect mTextBound;
	private Paint mTextPaint;

	public ChangeColorIconWithText(Context context)
	{
		this(context, null);
	}

	public ChangeColorIconWithText(Context context, AttributeSet attrs)
	{
		this(context, attrs, 0);
	}

	/**
	 * 获取自定义属性的值
	 * 
	 * @param context
	 * @param attrs
	 * @param defStyleAttr
	 */
	public ChangeColorIconWithText(Context context, AttributeSet attrs,
			int defStyleAttr)
	{
		super(context, attrs, defStyleAttr);

		TypedArray a = context.obtainStyledAttributes(attrs,
				R.styleable.ChangeColorIconWithText);

		int n = a.getIndexCount();

		for (int i = 0; i < n; i++)
		{
			int attr = a.getIndex(i);
			switch (attr)
			{
			case R.styleable.ChangeColorIconWithText_icon:
				BitmapDrawable drawable = (BitmapDrawable) a.getDrawable(attr);
				mIconBitmap = drawable.getBitmap();
				break;
			case R.styleable.ChangeColorIconWithText_color:
				mColor = a.getColor(attr, 0xFF45C01A);
				break;
			case R.styleable.ChangeColorIconWithText_text:
				mText = a.getString(attr);
				break;
			case R.styleable.ChangeColorIconWithText_text_size:
				mTextSize = (int) a.getDimension(attr, TypedValue
						.applyDimension(TypedValue.COMPLEX_UNIT_SP, 12,
								getResources().getDisplayMetrics()));
				break;
			}

		}

		a.recycle();

		//初始化变量
		mTextBound = new Rect();
		mTextPaint = new Paint();
		mTextPaint.setTextSize(mTextSize);
		mTextPaint.setColor(0Xff555555);
		//测量字的范围，mTextBound包含字的宽高
		mTextPaint.getTextBounds(mText, 0, mText.length(), mTextBound);  

	}

	@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
	{
		super.onMeasure(widthMeasureSpec, heightMeasureSpec);
		//icon的宽度：
		int iconWidth = Math.min(getMeasuredWidth() - getPaddingLeft()
				- getPaddingRight(), getMeasuredHeight() - getPaddingTop()
				- getPaddingBottom() - mTextBound.height());

		int left = getMeasuredWidth() / 2 - iconWidth / 2;
		int top = getMeasuredHeight() / 2 - (mTextBound.height() + iconWidth)
				/ 2;
		//获得绘制的范围
		mIconRect = new Rect(left, top, left + iconWidth, top + iconWidth);
	}

	@Override
	protected void onDraw(Canvas canvas)
	{
		//绘制图片
		canvas.drawBitmap(mIconBitmap, null, mIconRect, null);

		int alpha = (int) Math.ceil(255 * mAlpha);

		// 内存去准备mBitmap , setAlpha , 纯色 ，xfermode ， 图标
		setupTargetBitmap(alpha);
		// 1、绘制原文本 ； 2、绘制变色的文本
		drawSourceText(canvas, alpha);
		drawTargetText(canvas, alpha);
		
		canvas.drawBitmap(mBitmap, 0, 0, null);

	}

	/**
	 * 绘制变色的文本
	 * 
	 * @param canvas
	 * @param alpha
	 */
	private void drawTargetText(Canvas canvas, int alpha)
	{
		mTextPaint.setColor(mColor);
		mTextPaint.setAlpha(alpha);
		int x = getMeasuredWidth() / 2 - mTextBound.width() / 2;
		int y = mIconRect.bottom + mTextBound.height();
		canvas.drawText(mText, x, y, mTextPaint);

	}

	/**
	 * 绘制原文本
	 * 
	 * @param canvas
	 * @param alpha
	 */
	private void drawSourceText(Canvas canvas, int alpha)
	{
		mTextPaint.setColor(0xff333333);
		mTextPaint.setAlpha(255 - alpha);
		int x = getMeasuredWidth() / 2 - mTextBound.width() / 2;
		int y = mIconRect.bottom + mTextBound.height();
		canvas.drawText(mText, x, y, mTextPaint);

	}

	/**
	 * 在内存中绘制可变色的Icon
	 */
	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 static final String INSTANCE_STATUS = "instance_status";
	private static final String STATUS_ALPHA = "status_alpha";

	@Override
	protected Parcelable onSaveInstanceState()
	{
		Bundle bundle = new Bundle();
		bundle.putParcelable(INSTANCE_STATUS, super.onSaveInstanceState());
		bundle.putFloat(STATUS_ALPHA, mAlpha);
		return bundle;
	}

	@Override
	protected void onRestoreInstanceState(Parcelable state)
	{
		if (state instanceof Bundle)
		{
			Bundle bundle = (Bundle) state;
			mAlpha = bundle.getFloat(STATUS_ALPHA);
			super.onRestoreInstanceState(bundle.getParcelable(INSTANCE_STATUS));
			return;
		}
		super.onRestoreInstanceState(state);
	}

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

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

}

2.布局

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:hyman="http://schemas.android.com/apk/res/com.imooc.weixin6_0"
    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="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" >
    </android.support.v4.view.ViewPager>

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

        <com.imooc.weixin6_0.ChangeColorIconWithText
            android:id="@+id/id_indicator_one"
            android:layout_width="0dp"
            android:layout_height="fill_parent"
            android:layout_weight="1"
            android:padding="5dp"
            hyman:icon="@drawable/ic_menu_start_conversation"
            hyman:text="@string/app_name"
            hyman:text_size="12sp"
            hyman:color="#ff45c01a" />

        <com.imooc.weixin6_0.ChangeColorIconWithText
            android:id="@+id/id_indicator_two"
            android:layout_width="0dp"
            android:layout_height="fill_parent"
            android:layout_weight="1"
            android:padding="5dp"
            hyman:icon="@drawable/ic_menu_friendslist"
            hyman:text="@string/tab_contact"
            hyman:text_size="12sp"
            hyman:color="#ff45c01a" />

        <com.imooc.weixin6_0.ChangeColorIconWithText
            android:id="@+id/id_indicator_three"
            android:layout_width="0dp"
            android:layout_height="fill_parent"
            android:layout_weight="1"
            android:padding="5dp"
            hyman:icon="@drawable/ic_menu_emoticons"
            hyman:text="@string/tab_found"
            hyman:text_size="12sp"
            hyman:color="#ff45c01a" />

        <com.imooc.weixin6_0.ChangeColorIconWithText
            android:id="@+id/id_indicator_four"
            android:layout_width="0dp"
            android:layout_height="fill_parent"
            android:layout_weight="1"
            android:padding="5dp"
            hyman:icon="@drawable/ic_menu_allfriends"
            hyman:text="@string/tab_me"
            hyman:text_size="12sp"
            hyman:color="#ff45c01a" />
    </LinearLayout>

</LinearLayout>

3.MainActivity

import java.lang.reflect.Field;
import java.lang.reflect.Method;
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 android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewConfiguration;
import android.view.Window;

public class MainActivity extends FragmentActivity implements OnClickListener,
		OnPageChangeListener
{

	private ViewPager mViewPager;
	private List<Fragment> mTabs = new ArrayList<Fragment>();
	private String[] mTitles = new String[]
	{ "First Fragment !", "Second Fragment !", "Third Fragment !",
			"Fourth Fragment !" };
	private FragmentPagerAdapter mAdapter;

	private List<ChangeColorIconWithText> mTabIndicators = new ArrayList<ChangeColorIconWithText>();

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

		initView();
		initDatas();
		mViewPager.setAdapter(mAdapter);
		initEvent();

	}

	/**
	 * 初始化所有事件
	 */
	private void initEvent()
	{

		mViewPager.setOnPageChangeListener(this);

	}

	private void initDatas()
	{
		for (String title : mTitles)
		{
			TabFragment tabFragment = new TabFragment();
			Bundle bundle = new Bundle();
			bundle.putString(TabFragment.TITLE, title);
			tabFragment.setArguments(bundle);
			mTabs.add(tabFragment);
		}

		mAdapter = new FragmentPagerAdapter(getSupportFragmentManager())
		{

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

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

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

		ChangeColorIconWithText one = (ChangeColorIconWithText) findViewById(R.id.id_indicator_one);
		mTabIndicators.add(one);
		ChangeColorIconWithText two = (ChangeColorIconWithText) findViewById(R.id.id_indicator_two);
		mTabIndicators.add(two);
		ChangeColorIconWithText three = (ChangeColorIconWithText) findViewById(R.id.id_indicator_three);
		mTabIndicators.add(three);
		ChangeColorIconWithText four = (ChangeColorIconWithText) findViewById(R.id.id_indicator_four);
		mTabIndicators.add(four);

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

		one.setIconAlpha(1.0f);

	}

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

	private void setOverflowButtonAlways()
	{
		try
		{
			ViewConfiguration config = ViewConfiguration.get(this);
			Field menuKey = ViewConfiguration.class
					.getDeclaredField("sHasPermanentMenuKey");
			menuKey.setAccessible(true);
			menuKey.setBoolean(config, false);
		} catch (Exception e)
		{
			e.printStackTrace();
		}
	}

	/**
	 * 设置menu显示icon
	 */
	@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)
				{
					e.printStackTrace();
				}
			}
		}

		return super.onMenuOpened(featureId, menu);
	}

	@Override
	public void onClick(View v)
	{
		clickTab(v);

	}

	/**
	 * 点击Tab按钮
	 * 
	 * @param v
	 */
	private void clickTab(View v)
	{
		resetOtherTabs();

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

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

	@Override
	public void onPageScrolled(int position, float positionOffset,
			int positionOffsetPixels)
	{
		// Log.e("TAG", "position = " + position + " ,positionOffset =  "
		// + positionOffset);
		if (positionOffset > 0)
		{
			ChangeColorIconWithText left = mTabIndicators.get(position);
			ChangeColorIconWithText right = mTabIndicators.get(position + 1);
			left.setIconAlpha(1 - positionOffset);
			right.setIconAlpha(positionOffset);
		}

	}

	@Override
	public void onPageSelected(int position)
	{
		// TODO Auto-generated method stub

	}

	@Override
	public void onPageScrollStateChanged(int state)
	{
		// TODO Auto-generated method stub

	}

}