LayoutInflater拦截View创建，自定义Resource对象

场景：

1.统一设计Activity风格

2.加载外部资源，替换应用风格

3.不重启Activity的情况下，替换应用风格

4.应用使用系统默认View，开发者进行代码重构，想要增加view的功能，使用自定义View代替，却不想更改布局文件。例如：AppcomptActivity在factory使用新的View替换，实现风格的变换

原理：

1.拦截view创建

1.1创建自定义View

1.2穿件默认View，加载新的资源文件，设置View的属性

class SkinFactory implements LayoutInflater.Factory {
private Context context;
Resources resources;
ArrayList<WeakReference<SkinAttr>> skinAttrs = new ArrayList<WeakReference<SkinAttr>>();

public SkinFactory(Context context, Resources resources) {
this.resources = resources;
this.context = context;
}

@Override
public View onCreateView(String name, Context context, AttributeSet attrs) {
// 创建View-----------------------start
View view = null;
try {
if (-1 == name.indexOf('.')) {
if ("View".equals(name)) {
view = LayoutInflater.from(context).createView(name,
"android.view.", attrs);
}
if (view == null) {
view = LayoutInflater.from(context).createView(name,
"android.widget.", attrs);
}
if (view == null) {
view = LayoutInflater.from(context).createView(name,
"android.webkit.", attrs);
}
} else {
view = LayoutInflater.from(context).createView(name, null,
attrs);
}
} catch (Exception e) {
e.printStackTrace();
view = null;
}
// 创建View-----------------------end
if (view == null) {
return null;
}
for (int i = 0; i < attrs.getAttributeCount(); i++) {
String attributeName = attrs.getAttributeName(i);
String attributeValue = attrs.getAttributeValue(i);
//// TODO: 2/17/2017 find attr that can be change and set new attr
if (resources != null)
applyResource(resources, new SkinAttr(view, attributeName, attributeValue));
}
return view;
}

public void resotreDefault() {
for (WeakReference<SkinAttr> skinAttrWeakReference : skinAttrs) {
SkinAttr skinAttr = skinAttrWeakReference.get();
if (skinAttr != null && skinAttr.getView() != null) {
applyResource(context.getResources(), skinAttr);
}
}
}

public void applyResource(Resources resource,  SkinAttr skinAttr) {

}

class SkinAttr {
View view;
String attributeName;
String attributeValue;

public SkinAttr(View view, String attributeName, String attributeValue) {
this.view = view;
this.attributeName = attributeName;
this.attributeValue = attributeValue;
}

public String getAttributeName() {
return attributeName;
}

public View getView() {
return view;
}

public String getAttributeValue() {
return attributeValue;
}

public String getAttributeValueType() {
return attributeValue.split("/")[0];
}

public String getAttributeValueName() {
return attributeValue.split("/")[1];
}
}
}