版本更新

package com.example.ma.utils;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.MalformedURLException;

import java.net.URL;

import java.text.DecimalFormat;

import org.xmlpull.v1.XmlPullParserException;

import com.example.ma.R;

import com.example.ma.bean.NewVersion;

import android.annotation.SuppressLint;

import android.app.AlertDialog;

import android.app.Dialog;

import android.app.ProgressDialog;

import android.app.AlertDialog.Builder;

import android.content.Context;

import android.content.Intent;

import android.content.DialogInterface;

import android.content.DialogInterface.OnClickListener;

import android.content.DialogInterface.OnCancelListener;

import android.content.pm.PackageInfo;

import android.content.pm.PackageManager.NameNotFoundException;

import android.net.Uri;

import android.os.Environment;

import android.os.Handler;

import android.os.Message;

import android.view.LayoutInflater;

import android.view.View;

import android.widget.ProgressBar;

import android.widget.TextView;

import android.widget.Toast;

/**

 * @author wj 更新下载的工具类

 * 

 */

public class UpdateManager {

private static final int DOWN_NOSDCARD = 0;
private static final int DOWN_UPDATE = 1;
private static final int DOWN_OVER = 2;

private static UpdateManager updateManager;

private Context mContext;
// 通知对话框
private Dialog noticeDialog;
// 下载对话框
private Dialog downloadDialog;
// '已经是最新' 或者 '无法获取最新版本' 的对话框
private Dialog latestOrFailDialog;
// 进度条
private ProgressBar mProgress;
// 显示下载数值
private TextView mProgressText;
// 查询动画
private ProgressDialog mProDialog;
// 进度值
private int progress;
// 下载线程
private Thread downLoadThread;
// 终止标记
private boolean interceptFlag;
// 提示语
private String updateMsg = "";
// 返回的安装包url
private String apkUrl = "";
// 下载包保存路径
private String savePath = "";
// apk保存完整路径
private String apkFilePath = "";
// 临时下载文件路径
private String tmpFilePath = "";
// 下载文件大小
private String apkFileSize;
// 已下载文件大小
private String tmpFileSize;

@SuppressWarnings("unused")
private String curVersionName = "";
@SuppressWarnings("unused")
private int curVersionCode;
private NewVersion mUpdate;

@SuppressLint("HandlerLeak")
private Handler mHandler = new Handler() {
@SuppressLint("ShowToast")
public void handleMessage(Message msg) {
switch (msg.what) {
case DOWN_UPDATE:
mProgress.setProgress(progress);
mProgressText.setText(tmpFileSize + "/" + apkFileSize);
break;
case DOWN_OVER:
downloadDialog.dismiss();
installApk();
break;
case DOWN_NOSDCARD:
downloadDialog.dismiss();
Toast.makeText(mContext, "无法下载安装文件，请检查SD卡是否挂载",
Toast.LENGTH_SHORT).show();
break;
}
};
};

public static UpdateManager getUpdateManager() {
if (updateManager == null) {
updateManager = new UpdateManager();
}
updateManager.interceptFlag = false;
return updateManager;
}

/**
* 检查App更新
* 
* @param context
* @param isShowMsg
*            是否显示提示消息
*/
@SuppressLint("HandlerLeak")
public void checkAppUpdate(Context context, final boolean isShowMsg) {
this.mContext = context;
getCurrentVersion();
if (isShowMsg) {
if (mProDialog == null)
mProDialog = ProgressDialog.show(mContext, null, "正在检测，请稍后...",
true, true);
else if (mProDialog.isShowing()
|| (latestOrFailDialog != null && latestOrFailDialog
.isShowing()))
return;
}
final Handler handler = new Handler() {
@SuppressLint("HandlerLeak")
public void handleMessage(Message msg) {
// 进度条对话框不显示 - 检测结果也不显示
if (mProDialog != null && !mProDialog.isShowing()) {
return;
}
// 关闭并释放释放进度条对话框
if (isShowMsg && mProDialog != null) {
mProDialog.dismiss();
mProDialog = null;
}
// 显示检测结果
if (msg.what == 1) {
mUpdate = (NewVersion) msg.obj;
if (mUpdate != null) {

showNoticeDialog();

}
}
}
};
new Thread() {
public void run() {
Message msg = new Message();
try {
// InputStream input = XmlUtils
// .getInput("http://www.oschina.net/MobileAppVersion.xml");
// NewVersion string = XmlUtils.getUrl(input);
NewVersion string = new NewVersion();
string.setDownloadUrl("http://www.oschina.net/uploads/osc-android-app-2.6.3-release.apk");
string.setUpdateLog("请更新");
msg.what = 1;
msg.obj = string;
handler.sendMessage(msg);
} catch (Exception e) {
e.printStackTrace();
}
}
}.start();
}

/**
* 获取当前客户端版本信息
*/
private void getCurrentVersion() {
try {
PackageInfo info = mContext.getPackageManager().getPackageInfo(
mContext.getPackageName(), 0);
curVersionName = info.versionName;
curVersionCode = info.versionCode;
} catch (NameNotFoundException e) {
e.printStackTrace(System.err);
}
}

/**
* 显示版本更新通知对话框
*/
private void showNoticeDialog() {
AlertDialog.Builder builder = new Builder(mContext);
builder.setTitle("软件版本更新");
updateMsg = mUpdate.getUpdateLog();
apkUrl = mUpdate.getDownloadUrl();
builder.setMessage(updateMsg);
builder.setPositiveButton("立即更新", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
showDownloadDialog();
}
});
builder.setNegativeButton("以后再说", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
noticeDialog = builder.create();
noticeDialog.show();
}

/**
* 显示下载对话框
*/
@SuppressLint("InflateParams")
private void showDownloadDialog() {
AlertDialog.Builder builder = new Builder(mContext);
builder.setTitle("正在下载新版本");

final LayoutInflater inflater = LayoutInflater.from(mContext);
View v = inflater.inflate(R.layout.softupdate_progress, null);
mProgress = (ProgressBar) v.findViewById(R.id.update_progress);
mProgressText = (TextView) v.findViewById(R.id.update_progress_text);

builder.setView(v);
builder.setNegativeButton("取消", new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
interceptFlag = true;
}
});
builder.setOnCancelListener(new OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
dialog.dismiss();
interceptFlag = true;
}
});
downloadDialog = builder.create();
downloadDialog.setCanceledOnTouchOutside(false);
downloadDialog.show();

downloadApk();
}

private Runnable mdownApkRunnable = new Runnable() {
@Override
public void run() {
try {
String apkName = "os中国.apk";
String tmpApk = "os中国.tmp";
// 判断是否挂载了SD卡
String storageState = Environment.getExternalStorageState();
if (storageState.equals(Environment.MEDIA_MOUNTED)) {
savePath = Environment.getExternalStorageDirectory()
.getAbsolutePath() + "/os中国/Update/";
File file = new File(savePath);
if (!file.exists()) {
file.mkdirs();
}
apkFilePath = savePath + apkName;
tmpFilePath = savePath + tmpApk;
}

// 没有挂载SD卡，无法下载文件
if (apkFilePath == null || apkFilePath == "") {
mHandler.sendEmptyMessage(DOWN_NOSDCARD);
return;
}

File ApkFile = new File(apkFilePath);

// 是否已下载更新文件
if (ApkFile.exists()) {
downloadDialog.dismiss();
installApk();
return;
}

// 输出临时下载文件
File tmpFile = new File(tmpFilePath);
FileOutputStream fos = new FileOutputStream(tmpFile);

URL url = new URL(apkUrl);
HttpURLConnection conn = (HttpURLConnection) url
.openConnection();
conn.connect();
int length = conn.getContentLength();
InputStream is = conn.getInputStream();

// 显示文件大小格式：2个小数点显示
DecimalFormat df = new DecimalFormat("0.00");
// 进度条下面显示的总文件大小
apkFileSize = df.format((float) length / 1024 / 1024) + "MB";

int count = 0;
byte buf[] = new byte[1024];

do {
int numread = is.read(buf);
count += numread;
// 进度条下面显示的当前下载文件大小
tmpFileSize = df.format((float) count / 1024 / 1024) + "MB";
// 当前进度值
progress = (int) (((float) count / length) * 100);
// 更新进度
mHandler.sendEmptyMessage(DOWN_UPDATE);
if (numread <= 0) {
// 下载完成 - 将临时下载文件转成APK文件
if (tmpFile.renameTo(ApkFile)) {
// 通知安装
mHandler.sendEmptyMessage(DOWN_OVER);
}
break;
}
fos.write(buf, 0, numread);
} while (!interceptFlag);// 点击取消就停止下载

fos.close();
is.close();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}

}
};

/**
* 下载apk
* 
* @param url
*/
private void downloadApk() {
downLoadThread = new Thread(mdownApkRunnable);
downLoadThread.start();
}

/**
* 安装apk
* 
* @param url
*/
private void installApk() {
File apkfile = new File(apkFilePath);
if (!apkfile.exists()) {
return;
}
Intent i = new Intent(Intent.ACTION_VIEW);
i.setDataAndType(Uri.parse("file://" + apkfile.toString()),
"application/vnd.android.package-archive");
mContext.startActivity(i);
}

}