Android example source code file (PowerTestActivity.java)

This example Android source code file (PowerTestActivity.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, app, application, handler, linearlayout, msg_navigate, msg_timeout, object, os, override, pagedonerunner, powertestactivity, runnable, simplechromeclient, simplewebviewclient, string, ui, url, webkit, webviewstatuschecker

The PowerTestActivity.java Android example source code

/*
 * Copyright (C) 2009 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.browserpowertest;

import android.app.Activity;
import android.app.ActivityThread;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.ViewGroup;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.webkit.WebSettings.LayoutAlgorithm;
import android.widget.LinearLayout;
import android.widget.LinearLayout.LayoutParams;

public class PowerTestActivity extends Activity {

    public static final String LOGTAG = "PowerTestActivity";
    public static final String PARAM_URL = "URL";
    public static final String PARAM_TIMEOUT = "Timeout";
    public static final int RESULT_TIMEOUT = 0xDEAD;
    public static final int MSG_TIMEOUT = 0xC001;
    public static final int MSG_NAVIGATE = 0xC002;
    public static final String MSG_NAV_URL = "url";
    public static final String MSG_NAV_LOGTIME = "logtime";

    private WebView webView;
    private SimpleWebViewClient webViewClient;
    private SimpleChromeClient chromeClient;
    private Handler handler;
    private boolean timeoutFlag;
    private boolean logTime;
    private boolean pageDone;
    private Object pageDoneLock;
    private int pageStartCount;
    private int manualDelay;
    private long startTime;
    private long pageLoadTime;
    private PageDoneRunner pageDoneRunner = new PageDoneRunner();

    public PowerTestActivity() {
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        Log.v(LOGTAG, "onCreate, inst=" + Integer.toHexString(hashCode()));

        LinearLayout contentView = new LinearLayout(this);
        contentView.setOrientation(LinearLayout.VERTICAL);
        setContentView(contentView);
        setTitle("Idle");

        webView = new WebView(this);
        webView.getSettings().setJavaScriptEnabled(true);
        webView.getSettings().setJavaScriptCanOpenWindowsAutomatically(false);
        webView.getSettings().setLayoutAlgorithm(LayoutAlgorithm.NORMAL);

        webViewClient = new SimpleWebViewClient();
        chromeClient = new SimpleChromeClient();
        webView.setWebViewClient(webViewClient);
        webView.setWebChromeClient(chromeClient);

        contentView.addView(webView, new LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.MATCH_PARENT, 0.0f));

        handler = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                switch (msg.what) {
                    case MSG_TIMEOUT:
                        handleTimeout();
                        return;
                    case MSG_NAVIGATE:
                        manualDelay = msg.arg2;
                        navigate(msg.getData().getString(MSG_NAV_URL), msg.arg1);
                        logTime = msg.getData().getBoolean(MSG_NAV_LOGTIME);
                        return;
                }
            }
        };

        pageDoneLock = new Object();
    }

    public void reset() {
        synchronized (pageDoneLock) {
            pageDone = false;
        }
        timeoutFlag = false;
        pageStartCount = 0;
        chromeClient.resetJsTimeout();
    }

    private void navigate(String url, int timeout) {
        if(url == null) {
            Log.v(LOGTAG, "URL is null, cancelling...");
            finish();
        }
        webView.stopLoading();
        if(logTime) {
            webView.clearCache(true);
        }
        startTime = System.currentTimeMillis();
        Log.v(LOGTAG, "Navigating to URL: " + url);
        webView.loadUrl(url);

        if(timeout != 0) {
            //set a timer with specified timeout (in ms)
            handler.sendMessageDelayed(handler.obtainMessage(MSG_TIMEOUT),
                    timeout);
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        Log.v(LOGTAG, "onDestroy, inst=" + Integer.toHexString(hashCode()));
        webView.clearCache(true);
        webView.destroy();
    }

    private boolean isPageDone() {
        synchronized (pageDoneLock) {
            return pageDone;
        }
    }

    private void setPageDone(boolean pageDone) {
        synchronized (pageDoneLock) {
            this.pageDone = pageDone;
            pageDoneLock.notifyAll();
        }
    }

    private void handleTimeout() {
        int progress = webView.getProgress();
        webView.stopLoading();
        Log.v(LOGTAG, "Page timeout triggered, progress = " + progress);
        timeoutFlag = true;
        handler.postDelayed(pageDoneRunner, manualDelay);
    }

    public boolean waitUntilDone() {
        validateNotAppThread();
        synchronized (pageDoneLock) {
            while(!isPageDone()) {
                try {
                    pageDoneLock.wait();
                } catch (InterruptedException ie) {
                    //no-op
                }
            }
        }
        return timeoutFlag;
    }

    public Handler getHandler() {
        return handler;
    }

    private final void validateNotAppThread() {
        if (ActivityThread.currentActivityThread() != null) {
            throw new RuntimeException(
                "This method can not be called from the main application thread");
        }
    }

    public long getPageLoadTime() {
        return pageLoadTime;
    }

    public boolean getPageError() {
        return webViewClient.getPageErrorFlag();
    }

    class SimpleWebViewClient extends WebViewClient {

        private boolean pageErrorFlag = false;

        @Override
        public void onReceivedError(WebView view, int errorCode, String description,
                String failingUrl) {
            pageErrorFlag = true;
            Log.v(LOGTAG, "WebCore error: code=" + errorCode
                    + ", description=" + description
                    + ", url=" + failingUrl);
        }

        @Override
        public void onPageStarted(WebView view, String url, Bitmap favicon) {
            pageStartCount++;
            Log.v(LOGTAG, "onPageStarted: " + url);
        }

        @Override
        public void onPageFinished(WebView view, String url) {
            Log.v(LOGTAG, "onPageFinished: " + url);
            // let handleTimeout take care of finishing the page
            if(!timeoutFlag)
                handler.postDelayed(new WebViewStatusChecker(), 500);
        }

        // return true if the URL is not available or the page is down
        public boolean getPageErrorFlag() {
            return pageErrorFlag;
        }
    }

    class SimpleChromeClient extends WebChromeClient {

        private int timeoutCounter = 0;

        public void resetJsTimeout() {
            timeoutCounter = 0;
        }

        @Override
        public void onReceivedTitle(WebView view, String title) {
            PowerTestActivity.this.setTitle(title);
        }
    }

    class WebViewStatusChecker implements Runnable {

        private int initialStartCount;

        public WebViewStatusChecker() {
            initialStartCount = pageStartCount;
        }

        public void run() {
            if (initialStartCount == pageStartCount && !isPageDone()) {
                handler.removeMessages(MSG_TIMEOUT);
                webView.stopLoading();
                handler.postDelayed(pageDoneRunner, manualDelay);
            }
        }
    }

    class PageDoneRunner implements Runnable {

        public void run() {
            Log.v(LOGTAG, "Finishing URL: " + webView.getUrl());
            pageLoadTime = System.currentTimeMillis() - startTime;
            setPageDone(true);
        }
    }
}