写了个应用，实现了一组WebView的顺序，倒序，和随机加载。之中使用了延时，为什么要使用呢？请看下图：
package com.zms.csdngo;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.wifi.WifiManager;
import android.os.Handler;
import android.os.Message;
import android.os.PowerManager;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.Window;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import java.net.URL;
import java.net.URLConnection;
import java.util.Date;
import java.util.Random;
public class Main extends ActionBarActivity {
private String urlIndex = "http://blog.csdn.net/zhoumushui/article/details/";
private WebView mWebView;
private String webPath;
private int count = 0; // 当前加载的页面ID
private int reverseCount = 0;
private int realCount = 0; // 已加载的页面数
private int limitCount = 0; // 最大加载页面，到达此数值退出应用；为0表示不限制
private Boolean isLimit = false;
private TextView tvState = null;
private TextView mTimeHint = null;
private TextView mTimeCount = null;
private TextView tvWebHour = null;
private TextView tvLimit = null;
private EditText etLimit = null;
private int loadMode = 3; // 1-顺序加载；2-倒序加载；3-随机加载
private Button btnShowHide;
private Button btnChangeMode;
private static PowerManager.WakeLock wakeLock;
private int timeSec = 0; // 秒数，计时用
private int webHour = 8;
@Override
protected void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_NO_TITLE);
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mWebView = (WebView) findViewById(R.id.mWebView);
tvState = (TextView) findViewById(R.id.tvState);
mTimeHint = (TextView) findViewById(R.id.mTimeHint);
mTimeCount = (TextView) findViewById(R.id.mTimeCount);
tvWebHour = (TextView) findViewById(R.id.tvWebHour);
tvLimit = (TextView) findViewById(R.id.tvLimit);
etLimit = (EditText) findViewById(R.id.etLimit);
btnShowHide = (Button) findViewById(R.id.btnShowHide);
btnChangeMode = (Button) findViewById(R.id.btnChangeMode);
initModeBtn();
initUrl();
count = 0;
reverseCount = urlArray.length - 1;
setLimit(tvState);
//setMode(mTextView);
new Thread(new TimeThread()).start(); // 计时线程
new Thread(new loadThread()).start(); // 加载线程
}
final Handler timeHandler = new Handler() {
public void handleMessage(Message msg) {
switch (msg.what) {
case 1:
timeSec++;
String strTime = "";
if (timeSec < 60) { // 1分钟以下情况
strTime = timeSec + "秒";
} else if (timeSec < 3600) { // 1小时以下情况
int minutes = timeSec / 60;
int second = timeSec % 60;
strTime = minutes + "分" + second + "秒";
} else {
int hours = timeSec / 3600;
int minutes = (timeSec - hours * 3600) / 60;
int second = timeSec % 60;
strTime = hours + "时" + minutes + "分" + second + "秒";
}
mTimeCount.setText("运行时长：" + strTime);
tvWebHour.setText("设备时间" + getTime(1) + "时"+getTime(2)+"分"+getTime(3)+"秒");
}
super.handleMessage(msg);
}
};
public class TimeThread implements Runnable {
@Override
public void run() {
while (true) {
try {
Thread.sleep(1000);
Message message = new Message();
message.what = 1;
timeHandler.sendMessage(message);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
public void connectWifi() {
WifiManager wifiManager = (WifiManager) this.getSystemService(Context.WIFI_SERVICE);
if (!wifiManager.isWifiEnabled()) {
wifiManager.setWifiEnabled(true);
}
}
final Handler loadHandler = new Handler() {
public void handleMessage(Message msg) {
switch (msg.what) {
case 1:
if (loadMode == 1) { // 顺序加载
if (count < urlArray.length) {
webPath = urlIndex + urlArray[count++];
} else {
count = 0;
webPath = urlIndex + urlArray[count++];
}
} else if (loadMode == 2) { // 倒序加载
if (count >= urlArray.length) {
count = 0;
}
reverseCount = urlArray.length - 1 - (count++);
webPath = urlIndex + urlArray[reverseCount];
} else { // 默认：随机加载
count = new Random().nextInt(urlArray.length); // 0到(urlArray.length-1)
if (getTime(3) % 5 == 0) {// 如果当前秒数对5求余为0，则加载最近5篇
count = (urlArray.length - 5) + new Random().nextInt(5); // 0到4，加上
}
webPath = urlIndex + urlArray[count];
}
keepScreenOn(Main.this, true);
loadBlog(webPath);
break;
case 2:
tvState.setText("Network Error");
keepScreenOn(Main.this, false);
/*
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
connectWifi();
*/
break;
}
super.handleMessage(msg);
}
};
public class loadThread implements Runnable {
@Override
public void run() {
while (true) {
if (isNetworkConnected(Main.this)) {
try {
webHour = getTime(1);
if (webHour < 0 || webHour > 24) {
webHour = 8;
}
if (webHour >= 23 || webHour < 7) { // [0,7) AND [23,0)
int randomId = 1 + new Random().nextInt(3); // 1-3
mTimeHint.setText("延时" + randomId + "分");
Thread.sleep(randomId * 60000);
} else if ((webHour >= 8 && webHour <= 12) || (webHour >= 14 && webHour <= 18)) {
int randomId = 1 + new Random().nextInt(3); // 1-3
mTimeHint.setText("延时" + randomId + "秒");
Thread.sleep(randomId * 1000);
} else {
int randomId = 1 + new Random().nextInt(3); // 1-3
mTimeHint.setText("延时" + (2 * randomId) + "秒");
Thread.sleep(randomId * 2000);
}
Message message = new Message();
message.what = 1;
loadHandler.sendMessage(message);
} catch (Exception e) {
e.printStackTrace();
}
} else {
Message message = new Message();
message.what = 2;
loadHandler.sendMessage(message);
}
}
}
}
public int getTime(int type) {
Date date = new Date();
if (type == 1) {
return date.getHours();
} else if (type == 2) {
return date.getMinutes();
} else if (type == 3) {
return date.getSeconds();
} else {
return 0;
}
}
private void loadBlog(String path) {
mWebView.loadUrl(path);
mWebView.setWebViewClient(new WebViewClient() {
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
// return super.shouldOverrideUrlLoading(view, url);
view.loadUrl(url);
return true;
}
@Override
public void onPageFinished(WebView view, String url) {
// 截取URL的八位ID
String subString = url.toString().substring(
url.toString().length() - 8, url.toString().length());
super.onPageFinished(view, url);
if (!subString.equals(urlArray[urlArray.length - 1])) { // 是否是数组最后一个元素
realCount++;
if (loadMode == 2) {
tvState.setText("页面" + (reverseCount + 1) + "/" + urlArray.length + "--" + subString
+ "加载完毕，成功加载了" + realCount + "个页面");
} else {
tvState.setText("页面" + count + "/" + urlArray.length + "--" + subString
+ "加载完毕，成功加载了" + realCount + "个页面");
}
if (isLimit && (realCount >= limitCount)) {
ExitApp(tvState);
}
} else {
realCount++;
if (loadMode == 2) {
tvState.setText("页面" + (reverseCount + 1) + "/" + urlArray.length + "--" + subString
+ "加载完毕，成功加载了" + realCount + "个页面");
} else {
tvState.setText("页面" + count + "/" + urlArray.length + "--" + subString
+ "加载完毕，共加载了" + realCount + "个页面");
}
}
}
@Override
public void onReceivedError(WebView view, int errorCode,
String description, String failingUrl) {
super.onReceivedError(view, errorCode, description, failingUrl);
Log.e("CSDN", "" + errorCode + description);
tvState.setText("加载失败，请稍候再试.");
}
});
}
public void initModeBtn() {
// initial Mode Button Text
if (loadMode == 1) {
btnChangeMode.setText("顺序模式");
} else if (loadMode == 2) {
btnChangeMode.setText("倒序模式");
} else if (loadMode == 3) {
btnChangeMode.setText("随机模式");
}
}
public void ExitApp(View view) {
keepScreenOn(Main.this, false);
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.addCategory(Intent.CATEGORY_HOME);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
android.os.Process.killProcess(android.os.Process.myPid());
}
public void showHide(View view) {
if (mWebView.getVisibility() == View.GONE) {
mWebView.setVisibility(View.VISIBLE);
btnShowHide.setText("隐藏");
} else if (mWebView.getVisibility() == View.VISIBLE) {
mWebView.setVisibility(View.GONE);
btnShowHide.setText("显示");
}
}
public void setLimit(View view) {
if (etLimit.getText().toString() != null && etLimit.getText().toString().trim().length() > 0) {
limitCount = Integer.parseInt(etLimit.getText().toString());
}
if (limitCount < 0) {
limitCount = 0;
}
if (limitCount == 0) {
isLimit = false;
tvLimit.setText("限制规则：不限制");
} else if (limitCount > 0) {
isLimit = true;
tvLimit.setText("限制规则：加载" + limitCount + "个页面后退出");
}
}
public void changeMode(View view) {
if (loadMode == 1) {
loadMode = 2;
btnChangeMode.setText("倒序模式");
} else if (loadMode == 2) {
loadMode = 3;
btnChangeMode.setText("随机模式");
} else if (loadMode == 3) {
loadMode = 1;
btnChangeMode.setText("顺序模式");
}
}
// 网络状态
public boolean isNetworkConnected(Context context) {
if (context != null) {
ConnectivityManager mConnectivityManager = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo mNetworkInfo = mConnectivityManager
.getActiveNetworkInfo();
if (mNetworkInfo != null) {
return mNetworkInfo.isAvailable();
}
}
return false;
}
public static void keepScreenOn(Context context, boolean on) {
if (on) {
if (wakeLock == null) {
PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
wakeLock = pm.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK | PowerManager.ON_AFTER_RELEASE, "==KeepScreenOn==");
wakeLock.acquire();
} else {
Log.e("ZMS", "WakeLock Already On");
}
} else {
if (wakeLock != null) {
wakeLock.release();
wakeLock = null;
}
}
}
public String[] urlArray = new String[82]; // ##### Modify Me #####
// ##### Modify Me #####
public void initUrl() {
urlArray[81] = "42245481"; // 2014-12-29 21:22
urlArray[80] = "42192861"; // 2014-12-27 14:40
urlArray[79] = "42149731"; // 2014-12-25 17:49
urlArray[78] = "42127681"; // 2014-12-24 19:59
urlArray[77] = "42110329"; // 2014-12-23 21:51
urlArray[76] = "42085939"; // 2014-12-22 21:14
urlArray[75] = "42042547"; // 2014-12-20 14:25
urlArray[74] = "42023747"; // 2014-12-19 09:11
urlArray[73] = "42001049"; // 2014-12-18 09:02
urlArray[72] = "41982749"; // 2014-12-17 17:42
urlArray[71] = "41964147"; // 2014-12-16 18:45
urlArray[70] = "41909621"; // 2014-12-13 14:03
urlArray[69] = "41898205"; // 2014-12-12 19:55
urlArray[68] = "41852845"; // 2014-12-11 15:56
urlArray[67] = "41807913"; // 2014-12-08 19:55
urlArray[66] = "41787113"; // 2014-12-07 13:58
urlArray[65] = "41773471";
urlArray[64] = "41751259";
urlArray[63] = "41674841";
urlArray[62] = "41651909";
urlArray[61] = "41623903";
urlArray[60] = "41593769";
urlArray[59] = "41577725";
urlArray[58] = "41559167";
urlArray[57] = "41515985";
urlArray[56] = "41493939";
urlArray[55] = "41452531";
urlArray[54] = "41444931";
urlArray[53] = "41378661";
urlArray[52] = "41310305";
urlArray[51] = "41276657";
urlArray[50] = "41039497";
urlArray[49] = "41006711";
urlArray[48] = "41006711";
urlArray[47] = "40897455";
urlArray[46] = "40865095";
urlArray[45] = "40817269";
urlArray[44] = "40779347";
urlArray[43] = "40737065";
urlArray[42] = "40677441";
urlArray[41] = "40648971";
urlArray[40] = "40614011";
urlArray[39] = "40580995";
urlArray[38] = "40544365";
urlArray[37] = "40507193";
urlArray[36] = "40423803";
urlArray[35] = "40227437";
urlArray[34] = "40160843";
urlArray[33] = "40082987";
urlArray[32] = "40051331";
urlArray[31] = "40021129";
urlArray[30] = "39997481";
urlArray[29] = "39973739";
urlArray[28] = "39936867";
urlArray[27] = "39897617";
urlArray[26] = "39862237";
urlArray[25] = "39834141";
urlArray[24] = "39777229";
urlArray[23] = "39759943";
urlArray[22] = "39741221";
urlArray[21] = "39722311";
urlArray[20] = "39700219";
urlArray[19] = "39674051";
urlArray[18] = "39645901";
urlArray[17] = "39618057";
urlArray[16] = "39585513";
urlArray[15] = "39558107";
urlArray[14] = "39527977";
urlArray[13] = "39502685";
urlArray[12] = "39480497";
urlArray[11] = "39454145";
urlArray[10] = "39454145";
urlArray[9] = "39434451";
urlArray[8] = "39401061";
urlArray[7] = "39377419";
urlArray[6] = "39346957";
urlArray[5] = "39323633";
urlArray[4] = "39296439";
urlArray[3] = "39274019";
urlArray[2] = "39257041";
urlArray[1] = "39234287";
urlArray[0] = "39210795";
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
// ToDo:Setting Menu
Toast.makeText(Main.this, "ToDo", Toast.LENGTH_SHORT).show();
return true;
} else if (id == R.id.action_exit) {
ExitApp(tvState);
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onDestroy() {
super.onDestroy();
keepScreenOn(Main.this, false);
}
@Override
protected void onResume() {
// ToDo:Keep Screen Always On When Running
super.onResume();
}
}
原文地址：http://blog.csdn.net/zhoumushui/article/details/42399899
