Android高仿微信6.0界面切换图标变色源代码下载
1、概述
Android高仿微信6.0界面切换图标变色源代码下载
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,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。
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
<?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
<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
public class ChangeColorIconWithTextView extends View
- {
-
- private Bitmap mBitmap;
- private Canvas mCanvas;
- private Paint mPaint;
-
-
-
- private int mColor = 0xFF45C01A;
-
-
-
- private float mAlpha = 0f;
-
-
-
- private Bitmap mIconBitmap;
-
-
-
- private Rect mIconRect;
-
-
-
- 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);
- }
-
-
-
-
-
-
-
- public ChangeColorIconWithTextView(Context context, AttributeSet attrs)
- {
- super(context, attrs);
-
-
- 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);
-
- 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:
@Override
- protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
- {
- super.onMeasure(widthMeasureSpec, heightMeasureSpec);
-
-
- 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;
-
- 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
@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:
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
<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
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)
- {
-
-
-
- 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;
-
- }
-
- }
-
-
-
-
- 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
- {
-
- 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 ;
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
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;
- }
- }
Android高仿微信6.0界面切换图标变色源代码下载下载如图片无法显示或论文不完整,请联系qq752018766