Android example source code file (BridgeXmlPullAttributes.java)

This example Android source code file (BridgeXmlPullAttributes.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

android, bridgecontext, bridgexmlpullattributes, integer, iresourcevalue, override, string, util, utilities, utils

The BridgeXmlPullAttributes.java Android example source code

/*
 * Copyright (C) 2008 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.layoutlib.bridge;

import com.android.layoutlib.api.IResourceValue;

import org.xmlpull.v1.XmlPullParser;

import android.util.AttributeSet;
import android.util.XmlPullAttributes;

/**
 * A correct implementation of the {@link AttributeSet} interface on top of a XmlPullParser
 */
public class BridgeXmlPullAttributes extends XmlPullAttributes {

    private final BridgeContext mContext;
    private final boolean mPlatformFile;

    public BridgeXmlPullAttributes(XmlPullParser parser, BridgeContext context,
            boolean platformFile) {
        super(parser);
        mContext = context;
        mPlatformFile = platformFile;
    }

    /*
     * (non-Javadoc)
     * @see android.util.XmlPullAttributes#getAttributeNameResource(int)
     * 
     * This methods must return com.android.internal.R.attr.<name> matching
     * the name of the attribute.
     * It returns 0 if it doesn't find anything.
     */
    @Override
    public int getAttributeNameResource(int index) {
        // get the attribute name.
        String name = getAttributeName(index);
        
        // get the attribute namespace
        String ns = mParser.getAttributeNamespace(index);
        
        if (BridgeConstants.NS_RESOURCES.equals(ns)) {
            Integer v = Bridge.getResourceValue(BridgeConstants.RES_ATTR, name);
            if (v != null) {
                return v.intValue();
            }
            
            return 0;
        }
        
        // this is not an attribute in the android namespace, we query the customviewloader, if
        // the namespaces match.
        if (mContext.getProjectCallback().getNamespace().equals(ns)) {
            Integer v = mContext.getProjectCallback().getResourceValue(BridgeConstants.RES_ATTR,
                    name);
            if (v != null) {
                return v.intValue();
            }
        }

        return 0;
    }
    
    /*
     * (non-Javadoc)
     * @see android.util.XmlPullAttributes#getAttributeResourceValue(int, int)
     */
    @Override
    public int getAttributeResourceValue(int index, int defaultValue) {
        String value = getAttributeValue(index);
        
        return resolveResourceValue(value, defaultValue);
    }

    /*
     * (non-Javadoc)
     * @see android.util.XmlPullAttributes#getAttributeResourceValue(java.lang.String, java.lang.String, int)
     */
    @Override
    public int getAttributeResourceValue(String namespace, String attribute, int defaultValue) {
        String value = getAttributeValue(namespace, attribute);
        
        return resolveResourceValue(value, defaultValue);
    }

    private int resolveResourceValue(String value, int defaultValue) {
        // now look for this particular value
        IResourceValue resource = mContext.resolveResValue(mContext.findResValue(value));
        
        if (resource != null) {
            Integer id = null;
            if (mPlatformFile || resource.isFramework()) {
                id = Bridge.getResourceValue(resource.getType(), resource.getName());
            } else {
                id = mContext.getProjectCallback().getResourceValue(
                        resource.getType(), resource.getName());
            }

            if (id != null) {
                return id;
            }
        }
        
        return defaultValue;
    }

}