Android 轻量级动态换肤框架

package com.nd.sdp.android.common.skinmanager.external; import android.content.Context; import android.content.res.ColorStateList; import android.content.res.Resources; import android.graphics.Color; import android.graphics.drawable.Drawable; import android.graphics.drawable.StateListDrawable; import android.support.annotation.ColorInt; import android.support.annotation.Nullable; import android.support.v4.util.ArrayMap; import android.text.TextUtils; import org.jsoup.Jsoup; import org.jsoup.nodes.Attributes; import org.jsoup.nodes.Document; import org.jsoup.nodes.Element; import org.jsoup.select.Elements; import java.io.File; import java.io.FilenameFilter; import java.io.IOException; import java.lang.ref.SoftReference; import java.util.ArrayList; import java.util.List; public enum ResourceManager { INSTANCE; public static final String VALUE_DIR = "values"; public static final String COLOR_DIR = "color"; public static final String DRAWABLE_DIR = "drawable"; public static final String NINE_DRAWABLE_SUFFIX = ".9.png"; public static final String PNG_SUFFIX = ".png"; public static final String XML_SUFFIX = ".xml"; private ArrayMap<String, ColorStateList> mColorStateCache = new ArrayMap<>(); private ArrayMap<String, SoftReference<Drawable>> mDrawableCache = new ArrayMap<>(); private FilenameFilter mXmlFilter = new FilenameFilter() { @Override public boolean accept(File dir, String filename) { return filename.endsWith(XML_SUFFIX); } }; private FilenameFilter mDrawableFilter = new FilenameFilter() { @Override public boolean accept(File dir, String filename) { return filename.endsWith(PNG_SUFFIX); } }; ResourceManager() { } public Drawable getDrawableByName(Context context, String name) { parseDrawable(context); if (!mDrawableCache.containsKey(name)) { return null; } final SoftReference<Drawable> drawableSoftReference = mDrawableCache.get(name); return drawableSoftReference.get(); } private void parseDrawable(Context context) { if (mDrawableCache.isEmpty()) { try { final File skinDirectory = ExternalSkinManager.INSTANCE.getSkinDirectory(); final File drawableDir = new File(skinDirectory, DRAWABLE_DIR); if (drawableDir.exists()) { final File[] files = drawableDir.listFiles(mXmlFilter); for (File file : files) { final Document parse = Jsoup.parse(file, "UTF-8"); final Elements selectors = parse.getElementsByTag("selector"); if (selectors.isEmpty()) { continue; } final Element selector = selectors.get(0); final Elements children = selector.children(); StateListDrawable listDrawable = new StateListDrawable(); for (int i = 0; i < children.size(); i++) { Element child = children.get(i); if ("item".equals(child.tagName())) { final Attributes attributes = child.attributes(); String value = attributes.get("android:drawable"); int[] statesArr = getStatesArr(attributes); listDrawable.addState(statesArr, getDrawableFromFile(context, drawableDir.getAbsolutePath(), value)); } } String name = file.getName().replace(XML_SUFFIX, ""); SoftReference<Drawable> softReference = new SoftReference<Drawable>(listDrawable); mDrawableCache.put(name, softReference); } final File[] pngFiles = drawableDir.listFiles(mDrawableFilter); for (File file : pngFiles) { SoftReference<Drawable> softReference; String name; if (file.getName().endsWith(NINE_DRAWABLE_SUFFIX)) { name = file.getName().replace(NINE_DRAWABLE_SUFFIX, ""); Drawable patchy = NinePatchUtils.decodeDrawableFromFile(context, file.getAbsolutePath()); softReference = new SoftReference<>(patchy); } else { Drawable drawable = Drawable.createFromPath(file.getAbsolutePath()); name = file.getName().replace(PNG_SUFFIX, ""); softReference = new SoftReference<>(drawable); } mDrawableCache.put(name, softReference); } } } catch (Exception e) { e.printStackTrace(); // throw new Resources.NotFoundException(); } } } @Nullable private Drawable getDrawableFromFile(Context context, String path, String value) throws Exception { String fileName = String.format("%s%s", value.replace("@drawable/", ""), PNG_SUFFIX); File drawableFile = new File(path, fileName); String nineFileName = String.format("%s%s", value.replace("@drawable/", ""), NINE_DRAWABLE_SUFFIX); File nineDrawableFile = new File(path, nineFileName); if (drawableFile.exists()) { return Drawable.createFromPath(drawableFile.getAbsolutePath()); } else if (nineDrawableFile.exists()) { return NinePatchUtils.decodeDrawableFromFile(context, nineDrawableFile.getAbsolutePath()); } else { return null; } } @ColorInt public int getColor(String name) throws Resources.NotFoundException { parseColorStateList(); if (!mColorStateCache.containsKey(name)) { throw new Resources.NotFoundException(); } final ColorStateList colorStateList = mColorStateCache.get(name); return colorStateList.getDefaultColor(); } @Nullable public ColorStateList getColorStateList(String name) { parseColorStateList(); if (!mColorStateCache.containsKey(name)) { return null; } return mColorStateCache.get(name); } private void parseColorStateList() { if (mColorStateCache == null || mColorStateCache.isEmpty()) { try { final File skinDirectory = ExternalSkinManager.INSTANCE.getSkinDirectory(); final File valueDir = new File(skinDirectory, VALUE_DIR); if (valueDir.exists()) { final File[] files = valueDir.listFiles(mXmlFilter); for (File file : files) { final Document parse = Jsoup.parse(file, "UTF-8"); final Elements colors = parse.getElementsByTag("color"); for (Element color : colors) { final String name = color.attr("name"); final int parseColor = Color.parseColor(color.html()); int[][] states = new int[1][]; states[0] = new int[]{}; final ColorStateList colorStateList = new ColorStateList(states, new int[]{parseColor}); mColorStateCache.put(name, colorStateList); } } } // ColorState final File colorDir = new File(skinDirectory, COLOR_DIR); if (colorDir.exists()) { final