WML Support in Android

2011-11-26T01:56:00.001-08:00

WML or wap pages are built for older browser. Still wap pages available today but Android browser does not support it.
If you open it in a Android Browser it will be rendered as text. This is because in Android Framwork it's Mime Type is changed as text.

Even though wml code is present in external/webkit/WebCore, it is not enabled in Build structure.

We can achieve this by following below steps.

Step 1: Change in Android Framework (webkit/LoadListener.java)

handleHeaders(Headers headers){...

else if (mMimeType.equals("text/vnd.wap.wml")) {
                // As we don't support wml, render it as plain text
                mMimeType = "text/plain";

changes it to

 else if (mMimeType.equals("text/vnd.wap.wml")) {
 mMimeType = "text/vnd.wap.wml";
}

Step 2: Set ENABLE(WML) to true

Step 3:  modification in .mk files

To build the wml in Android Some Generated files are needed.

Like

WMLNames.h, WMLNames.cpp, WMLAttributeNames.h, WMLAttributeNames.cpp

To Generate these files 

Android.mk
Android.derived.mk
Android.derived.jscbindings.mk
Android.jscbindings.mk                   needs to be modified

add

GEN:= $(intermediates)/WMLNames.cpp $(intermediates)/WMLElementFactory.cpp

$(GEN): PRIVATE_PATH := $(LOCAL_PATH)

$(GEN): PRIVATE_CUSTOM_TOOL = perl -I $(PRIVATE_PATH)/bindings/scripts $< --tags $(wml_tags) --attrs $(wml_attrs) --extraDefines "$(FEATURE_DEFINES)" --factory --wrapperFactory --output $(dir $@)

$(GEN): wml_tags := $(LOCAL_PATH)/wml/WMLTagNames.in

$(GEN): wml_attrs := $(LOCAL_PATH)/html/WMLAttributeNames.in

$(GEN): $(LOCAL_PATH)/dom/make_names.pl $(wml_tags) $(wml_attrs)

$(transform-generated-source)

LOCAL_GENERATED_SOURCES += $(GEN)

in Android.derived.mk

 Once Those generated files are created your job is almost done.

Step 4: Remove error related to INSPECTOR

Once the build is finished webkit library is built and Android Browser now supports wml

Hope This will help..

Andromida

WML Support in Android