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Android example source code file (ExpatPerformanceTest.java)

This example Android source code file (ExpatPerformanceTest.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, androidtestcase, bytearrayinputstream, bytearrayoutputstream, file, inputstream, io, ioexception, kxmlparser, largetest, override, sax, saxexception, tag, test, utf-8, util, utilities, utils, xmlpullparserexception

The ExpatPerformanceTest.java Android example source code

/*
 * Copyright (C) 2007 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 android.sax;

import android.test.AndroidTestCase;
import android.test.suitebuilder.annotation.LargeTest;
import android.util.Log;
import android.util.Xml;
import org.kxml2.io.KXmlParser;
import org.xml.sax.SAXException;
import org.xml.sax.helpers.DefaultHandler;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

import com.android.frameworks.saxtests.R;

public class ExpatPerformanceTest extends AndroidTestCase {

    private static final String TAG = ExpatPerformanceTest.class.getSimpleName();

    private byte[] mXmlBytes;

    @Override
    public void setUp() throws Exception {
        super.setUp();
        InputStream in = mContext.getResources().openRawResource(R.raw.youtube);
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        byte[] buffer = new byte[1024];
        int length;
        while ((length = in.read(buffer)) != -1) {
            out.write(buffer, 0, length);
        }
        mXmlBytes = out.toByteArray();

        Log.i("***", "File size: " + (mXmlBytes.length / 1024) + "k");
    }

    @LargeTest
    public void testPerformance() throws Exception {
//        try {
//            Debug.startMethodTracing("expat3");
//        for (int i = 0; i < 1; i++) {
            runJavaPullParser();
            runSax();
            runExpatPullParser();
//        }
//    } finally {
//            Debug.stopMethodTracing();
//        }
    }

    private InputStream newInputStream() {
        return new ByteArrayInputStream(mXmlBytes);
    }

    private void runSax() throws IOException, SAXException {
        long start = System.currentTimeMillis();
        Xml.parse(newInputStream(), Xml.Encoding.UTF_8, new DefaultHandler());
        long elapsed = System.currentTimeMillis() - start;
        Log.i(TAG, "expat SAX: " + elapsed + "ms");
    }

    private void runExpatPullParser() throws XmlPullParserException, IOException {
        long start = System.currentTimeMillis();
        XmlPullParser pullParser = Xml.newPullParser();
        pullParser.setInput(newInputStream(), "UTF-8");
        withPullParser(pullParser);
        long elapsed = System.currentTimeMillis() - start;
        Log.i(TAG, "expat pull: " + elapsed + "ms");
    }

    private void runJavaPullParser() throws XmlPullParserException, IOException {
        XmlPullParser pullParser;
        long start = System.currentTimeMillis();
        pullParser = new KXmlParser();
        pullParser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, true);
        pullParser.setInput(newInputStream(), "UTF-8");
        withPullParser(pullParser);
        long elapsed = System.currentTimeMillis() - start;
        Log.i(TAG, "java pull parser: " + elapsed + "ms");
    }

    private static void withPullParser(XmlPullParser pullParser)
            throws IOException, XmlPullParserException {
        int eventType = pullParser.next();
        while (eventType != XmlPullParser.END_DOCUMENT) {
            switch (eventType) {
                case XmlPullParser.START_TAG:
                    pullParser.getName();
//                        int nattrs = pullParser.getAttributeCount();
//                        for (int i = 0; i < nattrs; ++i) {
//                            pullParser.getAttributeName(i);
//                            pullParser.getAttributeValue(i);
//                        }
                    break;
                case XmlPullParser.END_TAG:
                    pullParser.getName();
                    break;
                case XmlPullParser.TEXT:
                    pullParser.getText();
                    break;
            }
            eventType = pullParser.next();
        }
    }
}

Other Android examples (source code examples)

Here is a short list of links related to this Android ExpatPerformanceTest.java source code file:

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