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1.Drawable

Android中，所有能显示出来的都抽象定义为一个父类Drawable[可绘制的图形]，

1.1 Drawable资源

1. drawable文件放在res目录的各个drawable目录下；
2. \res\drawable一般放的是描述性的xml文件；
3. 图片文件一般放在具体分辨率的mipmap-xdpi或drawable-xdpi目录下；

1.2 Drawable多状态图形

StateListDrawable可以根据不同的手势状态变化图形，对应xml中的selector

引用的 shape_btn_blue_radius5.xml

引用的 shape_btn_gray_radius5.xml

1.3 多状态非引用

2.shape ：Android中最常用的xml绘图

2.1 先举例

2.2 详解

3.selector扩展

3.1 文字颜色选择器，要使用android:color=“ARGB|RGB颜色值”

3.2 使用 animated-rotate

3.3 java代码动态创建selector

public static void createSelector(Context context, View view, @DrawableRes int... resIds) {
           StateListDrawable stateListDrawable = new StateListDrawable();        Drawable drawablePre = ContextCompat.getDrawable(context, resIds[0]);        Drawable drawableDef = ContextCompat.getDrawable(context, resIds[1]);        stateListDrawable.addState(new int[]{
   android.R.attr.state_pressed, android.R.attr.state_enabled}, drawablePre);        stateListDrawable.addState(new int[0], drawableDef);        stateListDrawable.setState(new int[0]);        stateListDrawable.setEnterFadeDuration(200);        stateListDrawable.setExitFadeDuration(200);        view.setBackground(stateListDrawable);    }

3.4 java代码动态创建selector辅助类

public class SelectorHelper {
       //常用状态数组    public static final int[] STATE_DEFAULT = new int[0];    public static final int[] STATE_PRESSED = new int[]{
   android.R.attr.state_pressed, android.R.attr.state_enabled};    public static final int[] STATE_SELECTED = new int[]{
   android.R.attr.state_selected};    public static final int[] STATE_CHECKED = new int[]{
   android.R.attr.state_checked};    public static final int[] STATE_UNCHECKED = new int[]{
   -android.R.attr.state_checked};    public static final int[] STATE_DISABLED = new int[]{
   -android.R.attr.state_enabled};    public static final int[] STATE_FOCUSED = new int[]{
   android.R.attr.state_focused};    /**     * 动态创建一个简单的选择器     * @param context     * @param view     * @param resId     */    public static void createSelector(Context context, View view, @DrawableRes int... resId) {
           StateListDrawable stateListDrawable = new StateListDrawable();        Drawable drawablePre = ContextCompat.getDrawable(context, resId[0]);        Drawable drawableDef = ContextCompat.getDrawable(context, resId[1]);        stateListDrawable.addState(STATE_PRESSED, drawablePre);        stateListDrawable.addState(new int[0], drawableDef);        stateListDrawable.setState(new int[0]);        stateListDrawable.setEnterFadeDuration(200);        stateListDrawable.setExitFadeDuration(200);        view.setBackground(stateListDrawable);    }    /**     * 通过对图片的着色创建选择器     * @param context     * @param view     * @param isVector     * @param resId     */    public static void createSelector(Context context, View view, boolean isVector, @DrawableRes int resId) {
           StateListDrawable stateListDrawable = new StateListDrawable();        Drawable drawableSrc;        if (isVector) {
               drawableSrc = VectorDrawableCompat.create(context.getResources(), resId, context.getTheme());        } else {
               drawableSrc = ContextCompat.getDrawable(context, resId);        }        stateListDrawable.addState(STATE_PRESSED, drawableSrc);        stateListDrawable.addState(new int[0], drawableSrc);        stateListDrawable.setState(new int[0]);        Drawable wrapDrawable = DrawableCompat.wrap(stateListDrawable);        ColorStateList colorStateList = new ColorStateList(new int[][]{
                   STATE_PRESSED,                new int[0]        }, new int[]{
   0XFFFF0000, 0xFF00FF00});        DrawableCompat.setTintList(wrapDrawable, colorStateList);        view.setBackground(stateListDrawable);    }    /**     * 文字颜色选择器     * @param v     */    public static void createSelector(TextView v) {
           ColorStateList colorStateList = new ColorStateList(new int[][]{
                   STATE_PRESSED,                new int[0]        }, new int[]{
   Color.CYAN, Color.BLACK});        v.setTextColor(colorStateList);    }    /**     *     * @param context        上下文     * @param view        View     * @param isVector 是否为矢量图     * @param resId    图片数组     */    public static void createSelector(Context context, View view, boolean isVector, @DrawableRes int... resId) {
           StateListDrawable stateListDrawable = new StateListDrawable();        Drawable drawableDis;        Drawable drawablePre;        Drawable drawableSel;        Drawable drawableDef;        if (isVector) {
               drawableDis = VectorDrawableCompat.create(context.getResources(), resId[0], context.getTheme());            drawablePre = VectorDrawableCompat.create(context.getResources(), resId[1], context.getTheme());            drawableSel = VectorDrawableCompat.create(context.getResources(), resId[2], context.getTheme());            drawableDef = VectorDrawableCompat.create(context.getResources(), resId[3], context.getTheme());        } else {
               drawableDis = ContextCompat.getDrawable(context, resId[0]);            drawablePre = ContextCompat.getDrawable(context, resId[1]);            drawableSel = ContextCompat.getDrawable(context, resId[2]);            drawableDef = ContextCompat.getDrawable(context, resId[3]);        }        stateListDrawable.addState(STATE_DISABLED, drawableDis);        stateListDrawable.addState(STATE_PRESSED, drawablePre);        stateListDrawable.addState(STATE_SELECTED, drawableSel);        stateListDrawable.addState(STATE_DEFAULT, drawableDef);        stateListDrawable.setState(STATE_DEFAULT);        stateListDrawable.setEnterFadeDuration(200);        stateListDrawable.setExitFadeDuration(200);        view.setBackground(stateListDrawable);    }}

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