本文共 32085 字，大约阅读时间需要 106 分钟。

MagicaSakura 是 Android 多主题框架。

具有以下优点：

• 列表内容
• 列表内容
• 支持白天彩色主题和夜间主题。
• 切换主题不需要重建activity
• 提供TintXXX控件适配不同的主题，更方便更快捷。
• 只需写一个drawable.xml 或者 layout.xml 就能自动适配到不同主题样式。
• 兼容4.0.3以上
• 易于集成到你的app。

首先进入Main的布局

对应Main怎么进入入口

//设置titleToolbar toolbar = (Toolbar) findViewById(R.id.toolbar);setSupportActionBar(toolbar);getSupportActionBar().setTitle(null);//设置中间竖直可滑动部分RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler);LinearLayoutManager layoutManager = new LinearLayoutManager(this);layoutManager.setSmoothScrollbarEnabled(true);//进行分割线的操作recyclerView.addItemDecoration(new RecyclerView.ItemDecoration() {    @Override    public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {        //8dp        final int padding = getResources().getDimensionPixelOffset(R.dimen.padding_half);        //返回适配器条目的位置        RecyclerView.LayoutParams layoutParams = (RecyclerView.LayoutParams) view.getLayoutParams();        final int position = layoutParams.getViewLayoutPosition();        if (position == 0) {            outRect.left = outRect.top = outRect.right = padding;            outRect.bottom = padding >> 1;        } else if (position == state.getItemCount() - 1) {            outRect.left = outRect.bottom = outRect.right = padding;            outRect.top = padding >> 1;        } else {            outRect.left = outRect.right = padding;            outRect.top = outRect.bottom = padding >> 1;        }    }});//设置进行水平还是垂直recyclerView.setLayoutManager(layoutManager);//设置适配器Adapter adapter = new Adapter();recyclerView.setAdapter(adapter);//适配器添加HolderTypeadapter.addViewHolderType(        ViewHolder.VIEW_HOLDER_HEADER,        ViewHolder.VIEW_HOLDER_LABEL,        ViewHolder.VIEW_HOLDER_HEADER,        ViewHolder.VIEW_HOLDER_LOGIN,        ViewHolder.VIEW_HOLDER_HEADER,        ViewHolder.VIEW_HOLDER_DOWNLOAD);

这里明白一个知识点

1. 关于Rect outRect这个参数

recyclerView.addItemDecoration(new RecyclerView.ItemDecoration() {            @Override            public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {            }}

在这个参数中Rect outRect这个矩形控制条目的显示

- outRect.left : 控制条目距离左边的距离 - outRect.right：条目距离右边的距离 - outRect.top : 条目距离上边的距离 - outRect.bottom : 条目距离下边的距离

1. 关于padding >> 1

相当于 padding/2的值

接下来我们就看看适配器

public static class Adapter extends RecyclerView.Adapter
   
     {
       List
    
      viewHolderTypes = new ArrayList<>();//视图类型    SparseArrayCompat
     
       titleIndexs = new SparseArrayCompat<>();//标题集合    @Override    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {        return ViewHolder.create(parent, viewType);根据类型创建每一个条目    }    @Override    public void onBindViewHolder(ViewHolder holder, int position) {        //将数据绑定到item视图上        if (holder instanceof ViewHolderHeader) {            ((ViewHolderHeader) holder).setTitle(titleIndexs.get(position));        }    }    //条目集合数    @Override    public int getItemCount() {        return viewHolderTypes.size();    }    //根据位置得到type信息    @Override    public int getItemViewType(int position) {        return viewHolderTypes.get(position);    }    //    public void addViewHolderType(int... type) {        for (int i = 0; i < type.length; i++) {            if (type[i] == ViewHolder.VIEW_HOLDER_HEADER) {                titleIndexs.put(i, titleIndexs.size() + 1);            }            viewHolderTypes.add(type[i]);        }        notifyDataSetChanged();    }}
     
    
   

对于适配器，最次也要实现以下几个方法

//onCreateViewHolder()负责为Item创建视图@Overridepublic RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {    return null;}//onBindViewHolder()负责将数据绑定到Item的视图上@Overridepublic void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {}//条目个数@Overridepublic int getItemCount() {    return 0;}

根据type创建对应的ViewHolder

public static abstract class ViewHolder extends RecyclerView.ViewHolder {
       public static final int VIEW_HOLDER_HEADER = 0;    public static final int VIEW_HOLDER_LABEL = VIEW_HOLDER_HEADER + 1;    public static final int VIEW_HOLDER_LOGIN = VIEW_HOLDER_LABEL + 1;    public static final int VIEW_HOLDER_DOWNLOAD = VIEW_HOLDER_LOGIN + 1;    public ViewHolder(View itemView) {        super(itemView);    }    public static ViewHolder create(ViewGroup viewHolder, int type) {        switch (type) {            case VIEW_HOLDER_HEADER:                return ViewHolderHeader.create(viewHolder);//[1.1]            case VIEW_HOLDER_LABEL:                return ViewHolderLabel.create(viewHolder);            case VIEW_HOLDER_LOGIN:                return ViewHolderLogin.create(viewHolder);            case VIEW_HOLDER_DOWNLOAD:                return ViewHolderChoice.create(viewHolder);            default:                return null;        }    }}

1.1 通过上面的调用开始初始化布局

public static class ViewHolderHeader extends ViewHolder {
       private static final String[] sTitles = new String[]{
  "Label", "Login", "Choice"};    TintImageView icon;    TextView title;    public ViewHolderHeader(View itemView) {        super(itemView);        icon = (TintImageView) itemView.findViewById(R.id.icon);        title = (TextView) itemView.findViewById(R.id.title);    }    public void setTitle(int index) {        title.setText(sTitles[index - 1]);        icon.setImageResource(itemView.getResources().getIdentifier(                "ic_looks_" + index, "drawable", itemView.getContext().getPackageName()));        icon.setImageTintList(R.color.theme_color_primary);    }    //对每一种单独type的条目进行初始化    public static ViewHolderHeader create(ViewGroup parent) {        return new ViewHolderHeader(LayoutInflater.from(                parent.getContext()).inflate(R.layout.layout_list_item_header, parent, false));    }}

补充知识点

icon.setImageResource(itemView.getResources().getIdentifier("ic_looks_" + index, "drawable", itemView.getContext().getPackageName()));

其中getIdentifier得到的是resId，这个图片的名称是：ic_looks_xxx,其中第二个参数得到的是drawable，raw，id这些类型名称，第三个参数是包名

其中ViewHolderHeader这些是根据type进行不同的配置的原理相同，现在我们就看看里面有什么补充点

1

title.setCompoundDrawablesWithIntrinsicBounds(!isChecked ? R.drawable.selector_lock : R.drawable.selector_unlock, 0, 0, 0);

设置一个图标在此TextView的上下左右四个不同的位置

主题

public class MyApplication extends Application implements ThemeUtils.switchColor {
       @Override    public void onCreate() {        super.onCreate();        //使用MyApplication中实现的接口        ThemeUtils.setSwitchColor(this);    }    //对应switchColor接口中的replaceColorById    @Override    public int replaceColorById(Context context, @ColorRes int colorId) {        //判断是不是默认主题色        if (ThemeHelper.isDefaultTheme(context)) {            return context.getResources().getColor(colorId);        }        //得到当前主题色        String theme = getTheme(context);        if (theme != null) {            colorId = getThemeColorId(context, colorId, theme);        }        return context.getResources().getColor(colorId);    }    //对应switchColor接口中的replaceColor，进行更换颜色    @Override    public int replaceColor(Context context, @ColorInt int originColor) {        //默认主题        if (ThemeHelper.isDefaultTheme(context)) {            return originColor;        }        String theme = getTheme(context);        int colorId = -1;        if (theme != null) {            colorId = getThemeColor(context, originColor, theme);        }        return colorId != -1 ? getResources().getColor(colorId) : originColor;    }    private String getTheme(Context context) {        if (ThemeHelper.getTheme(context) == ThemeHelper.CARD_STORM) {            return "blue";        } else if (ThemeHelper.getTheme(context) == ThemeHelper.CARD_HOPE) {            return "purple";        } else if (ThemeHelper.getTheme(context) == ThemeHelper.CARD_WOOD) {            return "green";        } else if (ThemeHelper.getTheme(context) == ThemeHelper.CARD_LIGHT) {            return "green_light";        } else if (ThemeHelper.getTheme(context) == ThemeHelper.CARD_THUNDER) {            return "yellow";        } else if (ThemeHelper.getTheme(context) == ThemeHelper.CARD_SAND) {            return "orange";        } else if (ThemeHelper.getTheme(context) == ThemeHelper.CARD_FIREY) {            return "red";        }        return null;    }    //得到colorid    private    @ColorRes    int getThemeColorId(Context context, int colorId, String theme) {        switch (colorId) {            case R.color.theme_color_primary:                return context.getResources().getIdentifier(theme, "color", getPackageName());            case R.color.theme_color_primary_dark:                return context.getResources().getIdentifier(theme + "_dark", "color", getPackageName());            case R.color.theme_color_primary_trans:                return context.getResources().getIdentifier(theme + "_trans", "color", getPackageName());        }        return colorId;    }    private    @ColorRes    int getThemeColor(Context context, int color, String theme) {        switch (color) {            case 0xfffb7299:                return context.getResources().getIdentifier(theme, "color", getPackageName());            case 0xffb85671:                return context.getResources().getIdentifier(theme + "_dark", "color", getPackageName());            case 0x99f0486c:                return context.getResources().getIdentifier(theme + "_trans", "color", getPackageName());        }        return -1;    }}

改变主题入口

//这个方法是TitleBar的方法，弹出一个Dialog@Overridepublic boolean onOptionsItemSelected(MenuItem item) {    if (item.getItemId() == R.id.change_theme) {        CardPickerDialog dialog = new CardPickerDialog();        dialog.setClickListener(this);        dialog.show(getSupportFragmentManager(), CardPickerDialog.TAG);        return true;    }    return super.onOptionsItemSelected(item);}

自定义Dialog CardPickerDialog

比如当前设置pink主题

case R.id.theme_pink:        mCurrentTheme = ThemeHelper.CARD_SAKURA;        setImageButtons(mCurrentTheme);        break;

当点击确定时

if (mClickListener != null) {    mClickListener.onConfirm(mCurrentTheme);}

@Overridepublic void onConfirm(int currentTheme) {    if (ThemeHelper.getTheme(MainActivity.this) != currentTheme) {        //当不是当前主题时进行设置，写入sp内        ThemeHelper.setTheme(MainActivity.this, currentTheme);        //        ThemeUtils.refreshUI(MainActivity.this, new ThemeUtils.ExtraRefreshable() {                    @Override                    public void refreshGlobal(Activity activity) {                        //for global setting, just do once                        if (Build.VERSION.SDK_INT >= 21) {                            //设置全局的标题栏                            final MainActivity context = MainActivity.this;                            ActivityManager.TaskDescription taskDescription =                                    new ActivityManager.TaskDescription(null, null,                                            ThemeUtils.getThemeAttrColor(context, android.R.attr.colorPrimary));                            setTaskDescription(taskDescription);                            //设置状态栏颜色                            getWindow().setStatusBarColor(                                    ThemeUtils.getColorById(context, R.color.theme_color_primary_dark));                        }                    }                    @Override                    public void refreshSpecificView(View view) {                    }                }        );        //底部显示一个黑框信息        View view = findViewById(R.id.snack_layout);        if (view != null) {            TextView textView = (TextView) view.findViewById(R.id.content);            textView.setText(getSnackContent(currentTheme));            SnackAnimationUtil.with(this, R.anim.snack_in, R.anim.snack_out)                    .setDismissDelayTime(1000)                    .setTarget(view)                    .play();        }    }}

如下核心代码

//得到系统定义的contentviewView rootView = activity.getWindow().getDecorView().findViewById(android.R.id.content);refreshView(rootView, extraRefreshable);

private static void refreshView(View view, ExtraRefreshable extraRefreshable) {        if (view == null) return;        view.destroyDrawingCache();        //如果View继承了Tintable，则利用tint方法去处理，我们稍后看这个方法如何处理        if (view instanceof Tintable) {            ((Tintable) view).tint();            //当处理后递归遍历该view容器下的其他控件            if (view instanceof ViewGroup) {                for (int i = 0; i < ((ViewGroup) view).getChildCount(); i++) {                    refreshView(((ViewGroup) view).getChildAt(i), extraRefreshable);                }            }        } else {            //            if (extraRefreshable != null) {                extraRefreshable.refreshSpecificView(view);            }            if (view instanceof AbsListView) {                try {                    //final RecycleBin mRecycler = new RecycleBin();对应拿到这个引用                    if (sRecyclerBin == null) {                        sRecyclerBin = AbsListView.class.getDeclaredField("mRecycler");                        sRecyclerBin.setAccessible(true);                    }                    if (sListViewClearMethod == null) {                        //拿到RecycleBin中的clear方法                        sListViewClearMethod = Class.forName("android.widget.AbsListView$RecycleBin")                                .getDeclaredMethod("clear");                        sListViewClearMethod.setAccessible(true);                    }                    //执行clear方法进行所有缓存view的清除                    sListViewClearMethod.invoke(sRecyclerBin.get(view));                } catch (NoSuchFieldException e) {                    e.printStackTrace();                } catch (ClassNotFoundException e) {                    e.printStackTrace();                } catch (NoSuchMethodException e) {                    e.printStackTrace();                } catch (InvocationTargetException e) {                    e.printStackTrace();                } catch (IllegalAccessException e) {                    e.printStackTrace();                }                //更新每一个视图                ListAdapter adapter = ((AbsListView) view).getAdapter();                while (adapter instanceof WrapperListAdapter) {                    adapter = ((WrapperListAdapter) adapter).getWrappedAdapter();                }                if (adapter instanceof BaseAdapter) {                    ((BaseAdapter) adapter).notifyDataSetChanged();                }            }            if (view instanceof RecyclerView) {                try {                    if (sRecycler == null) {                        sRecycler = RecyclerView.class.getDeclaredField("mRecycler");                        sRecycler.setAccessible(true);                    }                    if (sRecycleViewClearMethod == null) {                        sRecycleViewClearMethod = Class.forName("android.support.v7.widget.RecyclerView$Recycler")                                .getDeclaredMethod("clear");                        sRecycleViewClearMethod.setAccessible(true);                    }                    sRecycleViewClearMethod.invoke(sRecycler.get(view));                } catch (NoSuchMethodException e) {                    e.printStackTrace();                } catch (IllegalAccessException e) {                    e.printStackTrace();                } catch (NoSuchFieldException e) {                    e.printStackTrace();                } catch (InvocationTargetException e) {                    e.printStackTrace();                } catch (ClassNotFoundException e) {                    e.printStackTrace();                }                ((RecyclerView) view).getRecycledViewPool().clear();                ((RecyclerView) view).invalidateItemDecorations();            }            if (view instanceof ViewGroup) {                for (int i = 0; i < ((ViewGroup) view).getChildCount(); i++) {                    refreshView(((ViewGroup) view).getChildAt(i), extraRefreshable);                }            }        }    }

这样相当于核心又落到了Tintable.tint()方法

我们就先拿TintView说起

public class TintView extends View implements Tintable, AppCompatBackgroundHelper.BackgroundExtensible {
       private AppCompatBackgroundHelper mBackgroundHelper;    public TintView(Context context) {        this(context, null);    }    public TintView(Context context, AttributeSet attrs) {        this(context, attrs, 0);    }    public TintView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        //编辑模式就退出        if (isInEditMode()) {            return;        }        //此时理解成操作类        TintManager tintManager = TintManager.get(context);//[3.1]        //利用AppCompatBackgroundHelper组合当前控件和操作类TintManager        mBackgroundHelper = new AppCompatBackgroundHelper(this, tintManager);//[3.2]        mBackgroundHelper.loadFromAttribute(attrs, defStyleAttr);//[3.3]    }    ...}

现在我们就开始通过构造入口了解

3.1 TintManager.get(context)

目的很简单就是根据context生成对应的TintManager，然后添加到名称是INSTANCE_CACHE的WeakHashMap弱引用Map中

private static final WeakHashMap
   
     INSTANCE_CACHE = new WeakHashMap<>();public static com.bilibili.magicasakura.utils.TintManager get(Context context) {    if (context == null) return null;    if (context instanceof ContextThemeWrapper) {        context = ((ContextThemeWrapper) context).getBaseContext();    }    if (context instanceof android.view.ContextThemeWrapper) {        context = ((android.view.ContextThemeWrapper) context).getBaseContext();    }    com.bilibili.magicasakura.utils.TintManager tm = INSTANCE_CACHE.get(context);    if (tm == null) {        tm = new com.bilibili.magicasakura.utils.TintManager(context);//3.1.1        INSTANCE_CACHE.put(context, tm);    }    return tm;}
   

3.1.1 TintManager构造

private TintManager(Context context) {    mContextRef = new WeakReference<>(context);}

3.2 new AppCompatBackgroundHelper(this, tintManager)

就是一个存入的功能

public AppCompatBaseHelper(T view, TintManager tintManager) {    mView = view;    mTintManager = tintManager;}public AppCompatBackgroundHelper(View view, TintManager tintManager) {    super(view, tintManager);}

3.3 AppCompatBackgroundHelper.loadFromAttribute()

@SuppressWarnings("ResourceType")@Overridevoid loadFromAttribute(AttributeSet attrs, int defStyleAttr) {    initPadding();//得到view的上下左右padding    //得到早定义的属性    TypedArray array = mView.getContext().obtainStyledAttributes(attrs, R.styleable.TintViewBackgroundHelper, defStyleAttr, 0);    //如果backgroundTint这个参数有值    if (array.hasValue(R.styleable.TintViewBackgroundHelper_backgroundTint)) {        //设置值        mBackgroundTintResId = array.getResourceId(R.styleable.TintViewBackgroundHelper_backgroundTint, 0);        //之后看backgroundTintMode设置的模式是什么        if (array.hasValue(R.styleable.TintViewBackgroundHelper_backgroundTintMode)) {            //先进行解析模式，然后进行设置            //这里进行[3.3.1],[3.3.2]处理            setSupportBackgroundTintMode(DrawableUtils.parseTintMode(array.getInt(R.styleable.TintViewBackgroundHelper_backgroundTintMode, 0), null));        }        setSupportBackgroundTint(mBackgroundTintResId);//[3.3.3]    } else {        //如果没有设置backgroundTint，那就看android_background设置的值，如果设置了就设置背景了        Drawable drawable = mTintManager.getDrawable(mBackgroundResId = array.getResourceId(R.styleable.TintViewBackgroundHelper_android_background, 0));        if (drawable != null) {            setBackgroundDrawable(drawable);        }    }    array.recycle();}

3.3.1 DrawableUtils.parseTintMode(array.getInt(R.styleable.TintViewBackgroundHelper_backgroundTintMode, 0), null)

返回对应的mode

public static PorterDuff.Mode parseTintMode(int value, PorterDuff.Mode defaultMode) {    switch (value) {        case 3:            return PorterDuff.Mode.SRC_OVER;        case 5:            return PorterDuff.Mode.SRC_IN;        case 9:            return PorterDuff.Mode.SRC_ATOP;        case 14:            return PorterDuff.Mode.MULTIPLY;        case 15:            return PorterDuff.Mode.SCREEN;        case 16:            return Build.VERSION.SDK_INT >= 11 ? PorterDuff.Mode.valueOf("ADD")                    : defaultMode;        default:            return defaultMode;    }}

3.3.2

当mode不等于null的时候用一个TintInfo记录,我们需要记住mHasTintMode，mTintMode已经有值此时

private void setSupportBackgroundTintMode(PorterDuff.Mode mode) {    if (mBackgroundTintResId != 0 && mode != null) {        if (mBackgroundTintInfo == null) {            mBackgroundTintInfo = new TintInfo();        }        mBackgroundTintInfo.mHasTintMode = true;        mBackgroundTintInfo.mTintMode = mode;    }}

3.3.3 setSupportBackgroundTint()

当设置backgroundTint的时候得到mBackgroundTintResId进行操作

private boolean setSupportBackgroundTint(int resId) {    if (resId != 0) {        if (mBackgroundTintInfo == null) {            mBackgroundTintInfo = new TintInfo();        }        mBackgroundTintInfo.mHasTintList = true;        mBackgroundTintInfo.mTintList = mTintManager.getColorStateList(resId);    }    return applySupportBackgroundTint();//[3.3.4]}

applySupportBackgroundTint()

private boolean applySupportBackgroundTint() {    Drawable backgroundDrawable = mView.getBackground();    if (backgroundDrawable != null && mBackgroundTintInfo != null && mBackgroundTintInfo.mHasTintList) {        backgroundDrawable = DrawableCompat.wrap(backgroundDrawable);        backgroundDrawable = backgroundDrawable.mutate();//起到单一修改背景的作用，并不会影响其他控件的色        if (mBackgroundTintInfo.mHasTintList) {            //对背景设置颜色            DrawableCompat.setTintList(backgroundDrawable, mBackgroundTintInfo.mTintList);        }        if (mBackgroundTintInfo.mHasTintMode) {            //还可以根据view不同的状态进行着色            DrawableCompat.setTintMode(backgroundDrawable, mBackgroundTintInfo.mTintMode);        }        //看是否backgroundDrawable进行改变        if (backgroundDrawable.isStateful()) {            backgroundDrawable.setState(mView.getDrawableState());        }        setBackgroundDrawable(backgroundDrawable);        return true;    }    return false;}

这里参考一片文章：

我们通过项目再来举个栗子

1. 得到一个Item中的条目

public static class ViewHolderHeader extends ViewHolder {
           public static ViewHolderHeader create(ViewGroup parent) {            return new ViewHolderHeader(LayoutInflater.from(                    parent.getContext()).inflate(R.layout.layout_list_item_header, parent, false));        }}

1. layout_list_item_header.xml

• 其中scaleType:
  以原图完全显示为目的，将图片的内容完整居中显示，通过按比例缩小原图的size宽(高)等于或小于ImageView的宽(高)

• 对应：imageTint<color name="theme_color_primary">#fb7299</color>

public class TintImageView extends ImageView implements Tintable, AppCompatBackgroundHelper.BackgroundExtensible,        AppCompatImageHelper.ImageExtensible {
       public TintImageView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        if (isInEditMode()) {            return;        }        //生成TintManager        TintManager tintManager = TintManager.get(context);        //记录当前View与TintManager        mBackgroundHelper = new AppCompatBackgroundHelper(this, tintManager);//[4.1]        mBackgroundHelper.loadFromAttribute(attrs, defStyleAttr);//[4.2]        mImageHelper = new AppCompatImageHelper(this, tintManager);//[4.3]        mImageHelper.loadFromAttribute(attrs, defStyleAttr);//[4.4]    } ...   }

其中4.1和4.3都是记录作用就不多说

4.2 AppCompatBackgroundHelper.loadFromAttribute()

这里支持通过backgroundTintMode设置mode

void loadFromAttribute(AttributeSet attrs, int defStyleAttr) {    initPadding();//获取padding    TypedArray array = mView.getContext().obtainStyledAttributes(attrs, R.styleable.TintViewBackgroundHelper, defStyleAttr, 0);    if (array.hasValue(R.styleable.TintViewBackgroundHelper_backgroundTint)) {        //得到backgroundTint属性的值        mBackgroundTintResId = array.getResourceId(R.styleable.TintViewBackgroundHelper_backgroundTint, 0);        if (array.hasValue(R.styleable.TintViewBackgroundHelper_backgroundTintMode)) {            //得到backgroundTintMode的值并set,然后通过setSupportBackgroundTintMode设置进去            setSupportBackgroundTintMode(DrawableUtils.parseTintMode(array.getInt(R.styleable.TintViewBackgroundHelper_backgroundTintMode, 0), null));        }        setSupportBackgroundTint(mBackgroundTintResId);    } else {        Drawable drawable = mTintManager.getDrawable(mBackgroundResId = array.getResourceId(R.styleable.TintViewBackgroundHelper_android_background, 0));        if (drawable != null) {            setBackgroundDrawable(drawable);        }    }    array.recycle();}

首先用TintInfo记录，

private boolean setSupportBackgroundTint(int resId) {    if (resId != 0) {        if (mBackgroundTintInfo == null) {            mBackgroundTintInfo = new TintInfo();        }        mBackgroundTintInfo.mHasTintList = true;        mBackgroundTintInfo.mTintList = mTintManager.getColorStateList(resId);//是上一步配置的backgroundTint    }    return applySupportBackgroundTint();//[4.2.1]}

4.2.1 applySupportBackgroundTint()

private boolean applySupportBackgroundTint() {    Drawable backgroundDrawable = mView.getBackground();    if (backgroundDrawable != null && mBackgroundTintInfo != null && mBackgroundTintInfo.mHasTintList) {        //包装以后可进行着色        backgroundDrawable = DrawableCompat.wrap(backgroundDrawable);        backgroundDrawable = backgroundDrawable.mutate();//起到单一修改背景的作用，并不会影响其他控件的色        if (mBackgroundTintInfo.mHasTintList) {            //对背景设置颜色            DrawableCompat.setTintList(backgroundDrawable, mBackgroundTintInfo.mTintList);        }        if (mBackgroundTintInfo.mHasTintMode) {            //还可以根据view不同的状态进行着色            DrawableCompat.setTintMode(backgroundDrawable, mBackgroundTintInfo.mTintMode);        }        if (backgroundDrawable.isStateful()) {            backgroundDrawable.setState(mView.getDrawableState());        }        setBackgroundDrawable(backgroundDrawable);        return true;    }    return false;}

此时背景色已经设置完成

我们再来回顾一下，到底从哪里开始执行变色

private static void refreshView(View view, ExtraRefreshable extraRefreshable) {    if (view == null) return;    view.destroyDrawingCache();    if (view instanceof Tintable) {        ((Tintable) view).tint();//看这里

这个方法我们可以查看上面的回顾

TintImageView

@Overridepublic void tint() {    if (mBackgroundHelper != null) {        mBackgroundHelper.tint();//看一个就好    }    if (mImageHelper != null) {        mImageHelper.tint();    }}

@Overridepublic void tint() {    if (mBackgroundTintResId == 0 || !setSupportBackgroundTint(mBackgroundTintResId)) {        Drawable drawable = mTintManager.getDrawable(mBackgroundResId);//思想是根据mBackgroundResId得到Drawable        if (drawable == null) {            drawable = mBackgroundResId == 0 ? null : ContextCompat.getDrawable(mView.getContext(), mBackgroundResId);        }        setBackgroundDrawable(drawable);//设置背景    }}

最后我们就明白如何更换主题，我们主要是利用自定义控件，然后通过统一的设置进行更改。

根据项目结构进行大致分析

• drawables

FilterableStateListDrawable

• utils

ColorStateListUtilsDrawableInflateDelegateDrawableUtilsGradientDrawableInflateImplInputConnectionImplLayerDrawableInflateImplRippleDrawableInflateImplStateListDrawableInflateImplThemeUtilsTintInfoTintManagerVectorDrawableInflateImpl

• widgets

AppCompatBackgroundHelperAppCompatBaseHelperAppCompatCompoundButtonHelperAppCompatCompoundDrawableHelperAppCompatForegroundHelperAppCompatImageHelperAppCompatProgressBarHelperAppCompatSwitchHelperAppCompatTextHelperTintableTintAppAlertDialogDividingViewTintAppBarLayoutTintAutoCompleteTextViewTintButtonTintCheckBoxTintCheckedTextViewTintConstraintLayoutTintEditTextTintFrameLayoutTintGridLayoutTintImageViewTintLinearLayoutTintProgressBarTintProgressDialogTintRadioButtonTintRelativeLayoutTintSwitchCompatTintTextViewTintToolbarTintView

FilterableStateListDrawable

这个类是针对StateListDrawable不能针对单一的状态添加colorFilter设计的

public class FilterableStateListDrawable extends StateListDrawable {
       private int currIdx = -1;    private int childrenCount = 0;    private SparseArray
   
     filterMap;    public FilterableStateListDrawable() {        super();        filterMap = new SparseArray<>();    }    @Override    public void addState(int[] stateSet, Drawable drawable) {        super.addState(stateSet, drawable);        childrenCount++;    }    public void addState(int[] stateSet, Drawable drawable, ColorFilter colorFilter) {        if (colorFilter == null) {            addState(stateSet, drawable);            return;        }        // this is a new custom method, does not exist in parent class        int currChild = childrenCount;        addState(stateSet, drawable);        filterMap.put(currChild, colorFilter);    }    @Override    public boolean selectDrawable(int idx) {        boolean result = super.selectDrawable(idx);        // check if the drawable has been actually changed to the one I expect        if (getCurrent() != null) {            currIdx = result ? idx : currIdx;            setColorFilter(getColorFilterForIdx(currIdx));        } else {            currIdx = -1;            setColorFilter(null);        }        return result;    }    private ColorFilter getColorFilterForIdx(int idx) {        return filterMap != null ? filterMap.get(idx) : null;    }    @Override    public ConstantState getConstantState() {        return super.getConstantState();    }}
   

根据一个SparseArray这样就对应每一种状态有一个ColorFilter了。

ColorFilter主要用来处理颜色

- ColorMatrixColorFilter - LightingColorFilter - PorterDuffColorFilter

反正都是对图片颜色进行处理

再来看看ColorStateList的作用

/**  * 对TextView设置ColorStateList使其在Normal、Pressed、Focused、Unable四种状态下显示不同的颜色。
  * StateListDrawable可直接使用图片应用在相似场合。  */  public class ActColorStateList extends Activity implements OnClickListener {
         private TextView txtShow;      public void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.main);          txtShow = (TextView) findViewById(R.id.txtShow);          txtShow.setText("Sodino\nNormal:0xffffffff\nPressed:0xffffff00\nFocused:0xff0000ff\nUnable:0xffff0000");          txtShow.setTextColor(createColorStateList(0xffffffff, 0xffffff00, 0xff0000ff, 0xffff0000));          txtShow.setOnClickListener(this);      }      /** 对TextView设置不同状态时其文字颜色。 */      private ColorStateList createColorStateList(int normal, int pressed, int focused, int unable) {          int[] colors = new int[] { pressed, focused, normal, focused, unable, normal };          int[][] states = new int[6][];          states[0] = new int[] { android.R.attr.state_pressed, android.R.attr.state_enabled };          states[1] = new int[] { android.R.attr.state_enabled, android.R.attr.state_focused };          states[2] = new int[] { android.R.attr.state_enabled };          states[3] = new int[] { android.R.attr.state_focused };          states[4] = new int[] { android.R.attr.state_window_focused };          states[5] = new int[] {};          ColorStateList colorList = new ColorStateList(states, colors);          return colorList;      }      /** 设置Selector。 */      public static StateListDrawable newSelector(Context context, int idNormal, int idPressed, int idFocused,              int idUnable) {          StateListDrawable bg = new StateListDrawable();          Drawable normal = idNormal == -1 ? null : context.getResources().getDrawable(idNormal);          Drawable pressed = idPressed == -1 ? null : context.getResources().getDrawable(idPressed);          Drawable focused = idFocused == -1 ? null : context.getResources().getDrawable(idFocused);          Drawable unable = idUnable == -1 ? null : context.getResources().getDrawable(idUnable);          // View.PRESSED_ENABLED_STATE_SET          bg.addState(new int[] { android.R.attr.state_pressed, android.R.attr.state_enabled }, pressed);          // View.ENABLED_FOCUSED_STATE_SET          bg.addState(new int[] { android.R.attr.state_enabled, android.R.attr.state_focused }, focused);          // View.ENABLED_STATE_SET          bg.addState(new int[] { android.R.attr.state_enabled }, normal);          // View.FOCUSED_STATE_SET          bg.addState(new int[] { android.R.attr.state_focused }, focused);          // View.WINDOW_FOCUSED_STATE_SET          bg.addState(new int[] { android.R.attr.state_window_focused }, unable);          // View.EMPTY_STATE_SET          bg.addState(new int[] {}, normal);          return bg;      }      @Override      public void onClick(View v) {          if (v == txtShow) {              txtShow.setEnabled(false);          }      }  }

具体使用方法请

欢迎关注公众号：码老板