package com.dianping.loader;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.InputStream;
import java.util.HashMap;
import org.xmlpull.v1.XmlPullParser;
import android.content.Context;
import android.content.res.AssetManager;
import android.content.res.ColorStateList;
import android.content.res.Resources;
import android.content.res.XmlResourceParser;
import android.graphics.drawable.Drawable;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.dianping.app.MyApplication;
import com.dianping.loader.model.FileSpec;
import com.dianping.loader.model.SiteSpec;
public class MyResources {
FileSpec file;
String packageName;
Resources res;
AssetManager asset;
MyResources[] deps;
MyResources(FileSpec file, String packageName, Resources res,
AssetManager asset, MyResources[] deps) {
this.file = file;
this.packageName = packageName;
this.res = res;
this.asset = asset;
this.deps = deps;
}
/**
* Resources.getDrawable(id)
*/
public Drawable getDrawable(int id) {
return res.getDrawable(id);
}
/**
* Resources.getText(id)
*/
public CharSequence getText(int id) {
return res.getText(id);
}
/**
* Resources.getString(id)
*/
public String getString(int id) {
return res.getString(id);
}
/**
* Resources.getStringArray(id)
*/
public String[] getStringArray(int id) {
return res.getStringArray(id);
}
/**
* Resources.getColor(id)
*/
public int getColor(int id) {
return res.getColor(id);
}
/**
* Resources.getColorStateList(id)
*/
public ColorStateList getColorStateList(int id) {
return res.getColorStateList(id);
}
/**
* Resources.getDimension(id)
*/
public float getDimension(int id) {
return res.getDimension(id);
}
/**
* Resources.getDimensionPixelSize(id)
*/
public int getDimensionPixelSize(int id) {
return res.getDimensionPixelSize(id);
}
/**
* Resources.getDimensionPixelOffset(id)
*/
public int getDimensionPixelOffset(int id) {
return res.getDimensionPixelOffset(id);
}
/**
* Resources.openRawResource(id)
*/
public InputStream openRawResource(int id) {
return res.openRawResource(id);
}
public byte[] getRawResource(int id) {
InputStream ins = openRawResource(id);
try {
int n = ins.available();
ByteArrayOutputStream bos = new ByteArrayOutputStream(n > 0 ? n
: 4096);
byte[] buf = new byte[4096];
int l;
while ((l = ins.read(buf)) != -1) {
bos.write(buf, 0, l);
}
ins.close();
return bos.toByteArray();
} catch (Exception e) {
return new byte[0];
}
}
/**
* 返回独立的Resources
* <p>
* 对Resources进行操作时不会处理依赖关系，所有依赖包的内容均不会出现在该Resources中。
*
* @return
*/
public Resources getResources() {
return res;
}
/**
* 返回独立的AssetManager
* <p>
* 对AssetManager进行操作时不会处理依赖关系，所有依赖包的内容均不会出现在该AssetManager中。
*
* @return
*/
public AssetManager getAssets() {
return asset;
}
/**
* 同LayoutInflater.inflate(id, parent, attachToRoot)
* <p>
* 不会处理依赖关系，请确保id对应的layout在当前包内
*
* @param name
* @return
* @throws Resources.NotFoundException
*/
public View inflate(Context context, int id, ViewGroup parent,
boolean attachToRoot) {
if (!(context instanceof MainActivity)) {
throw new RuntimeException(
"unable to inflate without MainActivity context");
}
MainActivity ma = (MainActivity) context;
MyResources old = ma.getOverrideResources();
ma.setOverrideResources(this);
try {
View v = LayoutInflater.from(context).inflate(id, parent,
attachToRoot);
return v;
} finally {
ma.setOverrideResources(old);
}
}
static final HashMap<String, MyResources> loaders = new HashMap<String, MyResources>();
/**
* return null if not available on the disk
*/
public static MyResources getResource(SiteSpec site, FileSpec file) {
MyResources rl = loaders.get(file.id());
if (rl != null)
return rl;
String[] deps = file.deps();
MyResources[] rs = null;
if (deps != null) {
rs = new MyResources[deps.length];
for (int i = 0; i < deps.length; i++) {
FileSpec pf = site.getFile(deps[i]);
if (pf == null)
return null;
MyResources r = getResource(site, pf);
if (r == null)
return null;
rs[i] = r;
}
}
File dir = MyApplication.instance().getFilesDir();
dir = new File(dir, "repo");
if (!dir.isDirectory())
return null;
dir = new File(dir, file.id());
File path = new File(dir, TextUtils.isEmpty(file.md5()) ? "1.apk"
: file.md5() + ".apk");
if (!path.isFile())
return null;
try {
AssetManager am = (AssetManager) AssetManager.class.newInstance();
am.getClass().getMethod("addAssetPath", String.class)
.invoke(am, path.getAbsolutePath());
// parse packageName from AndroidManifest.xml
String packageName = null;
XmlResourceParser xml = am
.openXmlResourceParser("AndroidManifest.xml");
int eventType = xml.getEventType();
xmlloop: while (eventType != XmlPullParser.END_DOCUMENT) {
switch (eventType) {
case XmlPullParser.START_TAG:
if ("manifest".equals(xml.getName())) {
packageName = xml.getAttributeValue(
"http://schemas.android.com/apk/res/android",
"package");
break xmlloop;
}
}
eventType = xml.nextToken();
}
xml.close();
if (packageName == null) {
throw new RuntimeException(
"package not found in AndroidManifest.xml [" + path
+ "]");
}
Resources superRes = MyApplication.instance().getResources();
Resources res = new Resources(am, superRes.getDisplayMetrics(),
superRes.getConfiguration());
rl = new MyResources(file, packageName, res, am, rs);
} catch (Exception e) {
if (e instanceof RuntimeException)
throw (RuntimeException) e;
throw new RuntimeException(e);
}
loaders.put(file.id(), rl);
return rl;
}
/**
* 从当前类所在的包载入MyResource
*
* @param clazz
* @return
* @throws RuntimeException
* 如果当前类不是动态加载包载入的
*/
public static MyResources getResource(Class<?> clazz) {
if (!(clazz.getClassLoader() instanceof MyClassLoader)) {
throw new RuntimeException(clazz
+ " is not loaded from dynamic loader");
}
return getResource((MyClassLoader) clazz.getClassLoader());
}
static MyResources getResource(MyClassLoader mcl) {
FileSpec file = mcl.file;
MyResources rl = loaders.get(file.id());
if (rl != null)
return rl;
MyResources[] rs = null;
if (mcl.deps != null) {
rs = new MyResources[mcl.deps.length];
for (int i = 0; i < rs.length; i++) {
MyResources r = getResource(mcl.deps[i]);
rs[i] = r;
}
}
File dir = MyApplication.instance().getFilesDir();
dir = new File(dir, "repo");
if (!dir.isDirectory())
throw new RuntimeException(dir + " not exists");
dir = new File(dir, file.id());
File path = new File(dir, TextUtils.isEmpty(file.md5()) ? "1.apk"
: file.md5() + ".apk");
if (!path.isFile())
throw new RuntimeException(path + " not exists");
try {
AssetManager am = (AssetManager) AssetManager.class.newInstance();
am.getClass().getMethod("addAssetPath", String.class)
.invoke(am, path.getAbsolutePath());
Resources superRes = MyApplication.instance().getResources();
Resources res = new Resources(am, superRes.getDisplayMetrics(),
superRes.getConfiguration());
// parse packageName from AndroidManifest.xml
String packageName = null;
XmlResourceParser xml = am
.openXmlResourceParser("AndroidManifest.xml");
int eventType = xml.getEventType();
xmlloop: while (eventType != XmlPullParser.END_DOCUMENT) {
switch (eventType) {
case XmlPullParser.START_TAG:
if ("manifest".equals(xml.getName())) {
packageName = xml.getAttributeValue(null, "package");
break xmlloop;
}
}
eventType = xml.nextToken();
}
xml.close();
if (packageName == null) {
throw new RuntimeException(
"package not found in AndroidManifest.xml [" + path
+ "]");
}
rl = new MyResources(file, packageName, res, am, rs);
} catch (Exception e) {
if (e instanceof RuntimeException)
throw (RuntimeException) e;
throw new RuntimeException(e);
}
loaders.put(file.id(), rl);
return rl;
}
}