View inflation you can intercept.
ViewPump installs a custom LayoutInflater via a ContextThemeWrapper and provides an API of pre/post-inflation interceptors.
Include the dependency Download (.aar) :
dependencies {
compile 'io.github.inflationx:viewpump:2.0.1'
}
Define your interceptor. Below is a somewhat arbitrary example of a post-inflation interceptor that prefixes the text in a TextView.
public class TextUpdatingInterceptor implements Interceptor {
@Override
public InflateResult intercept(Chain chain) {
InflateResult result = chain.proceed(chain.request());
if (result.view() instanceof TextView) {
// Do something to result.view()
// You have access to result.context() and result.attrs()
TextView textView = (TextView) result.view();
textView.setText("[Prefix] " + textView.getText());
}
return result;
}
}
Below is an example of a pre-inflation interceptor that returns a CustomTextView when a TextView was defined in the layout's XML.
public class CustomTextViewInterceptor implements Interceptor {
@Override
public InflateResult intercept(Chain chain) {
InflateRequest request = chain.request();
View view = inflateView(request.name(), request.context(), request.attrs());
if (view != null) {
return InflateResult.builder()
.view(view)
.name(view.getClass().getName())
.context(request.context())
.attrs(request.attrs())
.build();
} else {
return chain.proceed(request);
}
}
}
Add your interceptors to the ViewPump.builder()
, in your Application
class in the #onCreate()
method and init
the ViewPump
. The order of the interceptors is important since they form the interceptor chain of requests and results.
An interceptor may choose to return a programmatically instantiated view rather than letting the default inflation occur, in which case interceptors added after it will be skipped. For this reason, it is better to add your post-inflation interceptors before the pre-inflation interceptors
@Override
public void onCreate() {
super.onCreate();
ViewPump.init(ViewPump.builder()
.addInterceptor(new TextUpdatingInterceptor())
.addInterceptor(new CustomTextViewInterceptor())
.build());
//....
}
Wrap the Activity
Context:
@Override
protected void attachBaseContext(Context newBase) {
super.attachBaseContext(ViewPumpContextWrapper.wrap(newBase));
}
You're good to go!
To see more ideas for potential use cases, check out the Recipes wiki page.
Copyright 2017 InflationX
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you may not use this file except in compliance with the License.
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