一個類搞定安卓軟件升級，彈窗和進度下載

說明：涉及到OKhttp，請自行參考我的博文http://blog.csdn.net/tongzhenggang/article/details/53256420

調用方法：

AppUpdateManager manager = new AppUpdateManager(getActivity(),"http://xxx.com/appupdata/version.xml");
// 檢查軟件更新
manager.checkUpdate();

服務器部署文件：version.xml

<update>
   <version>2</version>
   <name>test_2.0</name>
   <url>http://d6.acbfds.cn/h12/tlh/xinqubang.apk</url>
</update>

類名：AppUpdateManager.java

package tool;

import android.annotation.SuppressLint;
import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.content.pm.PackageManager.NameNotFoundException;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.view.Gravity;
import android.view.ViewGroup;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
import android.widget.ProgressBar;
import android.widget.Toast;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import java.io.ByteArrayInputStream;
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.util.HashMap;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

/**
 * 檢查軟件更新
 * Created by [email protected] 2016/11/21
 */
public class AppUpdateManager {
    /* 文字參數 */
    private String soft_update_no = "已經是最新版本";
    private String soft_update_title = "軟件更新";
    private String soft_update_info = "檢測到新版本，立即更新嗎?";
    private String soft_update_updatebtn = "更新";
    private String soft_update_later = "稍後更新";
    private String soft_updating = "正在更新";
    private String soft_update_cancel = "取消";
    private String soft_update_erro = "網絡錯誤";

    /* 下載中 */
    private static final int DOWNLOAD = 1;
    /* 下載結束 */
    private static final int DOWNLOAD_FINISH = 2;
    /* 保存解析的XML信息 */
    HashMap<String, String> mHashMap;
    /* 下載保存路徑 */
    private String mSavePath;
    /* 記錄進度條數量 */
    private int progress;
    /* 是否取消更新 */
    private boolean cancelUpdate = false;

    private Context mContext;
    /* 下載地址 */
    private String DownloadUrl;
    /* 更新進度條 */
    private ProgressBar mProgress;
    private Dialog mDownloadDialog;

    @SuppressLint("HandlerLeak")
    private Handler mHandler = new Handler() {
        public void handleMessage(Message msg) {
            switch (msg.what) {
                // 正在下載
                case DOWNLOAD:
                    // 設置進度條位置
                    mProgress.setProgress(progress);
                    break;
                case DOWNLOAD_FINISH:
                    // 安裝文件
                    installApk();
                    break;
                default:
                    break;
            }
        }

        ;
    };

    public AppUpdateManager(Context context, String downloadUrl) {
        this.mContext = context;
        this.DownloadUrl = downloadUrl;
    }

    /**
     * 檢測軟件更新
     */
    public void checkUpdate() {
// 獲取當前軟件版本
        final int versionCode = getVersionCode(mContext);
        Handler mHandler = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                super.handleMessage(msg);
                if (msg.what == 0) {// 請求成功
//                     ToastUtil.show(mContext,msg.obj.toString());

                    InputStream inStream = new ByteArrayInputStream(msg.obj.toString().getBytes());
                    // 解析XML文件。 由於XML文件比較小，因此使用DOM方式進行解析
                    ParseXmlService service = new ParseXmlService();
                    try {
                        mHashMap = service.parseXml(inStream);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }

                    if (null != mHashMap) {
                        int serviceCode = Integer.valueOf(mHashMap.get("version"));
                        // 版本判斷
                        if (serviceCode > versionCode) {
                            // 顯示提示對話框
                            showNoticeDialog();
                        } else {
                            Toast.makeText(mContext, soft_update_no, Toast.LENGTH_LONG).show();
                        }
                    }


                } else {
                    ToastUtil.show(mContext, msg.obj.toString());
                }

            }
        };
        OkHttp3ClientManager.getInstance().getStringExecute(DownloadUrl,null,mHandler);


    }


    /**
     * 獲取軟件版本號
     *
     * @param context
     * @return
     */
    private int getVersionCode(Context context) {
        int versionCode = 0;
        try {
            // 獲取軟件版本號，對應AndroidManifest.xml下android:versionCode
            versionCode = context.getPackageManager().getPackageInfo(context.getPackageName(), 0).versionCode;
        } catch (NameNotFoundException e) {
            e.printStackTrace();
        }
        return versionCode;
    }

    /**
     * 顯示軟件更新對話框
     */
    @SuppressLint("NewApi")
    private void showNoticeDialog() {
        int Theme = android.R.style.Theme_DeviceDefault_Light_Dialog;
        int version = Build.VERSION.SDK_INT;
        if (version > 21) {
            Theme = android.R.style.Theme_DeviceDefault_Light_Dialog;
        } else {
            Theme = AlertDialog.THEME_DEVICE_DEFAULT_LIGHT;
        }

        // 構造對話框
        Builder builder = new Builder(mContext, Theme);
        builder.setTitle(soft_update_title);
        builder.setMessage(soft_update_info);
        // 更新
        builder.setPositiveButton(soft_update_updatebtn, new OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                // 顯示下載對話框
                showDownloadDialog();
            }
        });
        // 稍後更新
        builder.setNegativeButton(soft_update_later, new OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
            }
        });
        Dialog noticeDialog = builder.create();
        noticeDialog.show();
    }

    /**
     * 顯示軟件下載對話框
     */
    @SuppressLint("NewApi")
    private void showDownloadDialog() {

        // 構造軟件下載對話框
        Builder builder = new Builder(mContext, AlertDialog.THEME_HOLO_LIGHT);
        builder.setTitle(soft_updating);
        // 給下載對話框增加進度條
        FrameLayout framelayout = new FrameLayout(mContext);
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT //創建保存佈局參數的對象
        );
        params.gravity = Gravity.CENTER_HORIZONTAL | Gravity.CENTER_VERTICAL;//設置居中顯示
        /*mProgress條形進度條初始化*/
        mProgress = new ProgressBar(mContext, null, android.R.attr.progressBarStyleHorizontal);//水平條形
        mProgress.setMax(100);
        mProgress.setPadding(30, 60, 30, 60);
        mProgress.setLayoutParams(params);//設置佈局參數  
        framelayout.addView(mProgress);//將元素添加到佈局管理器中


        builder.setView(framelayout);
        // 取消更新
        builder.setNegativeButton(soft_update_cancel, new OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
                // 設置取消狀態
                cancelUpdate = true;
            }
        });
        mDownloadDialog = builder.create();
        mDownloadDialog.show();
        // 現在文件
        downloadApk();
    }

    /**
     * 下載apk文件
     */
    private void downloadApk() {
        // 啓動新線程下載軟件
        new downloadApkThread().start();
    }

    /**
     * 下載文件線程
     *
     * @author coolszy
     * @date 2012-4-26
     * @blog http://blog.92coding.com
     */
    private class downloadApkThread extends Thread {
        @Override
        public void run() {
            try {
                // 判斷SD卡是否存在，並且是否具有讀寫權限
                if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
                    // 獲得存儲卡的路徑
                    String sdpath = Environment.getExternalStorageDirectory() + "/";
                    mSavePath = sdpath + "download";
                    URL url = new URL(mHashMap.get("url"));
                    // 創建連接
                    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                    conn.connect();
                    // 獲取文件大小
                    int length = conn.getContentLength();
                    // 創建輸入流
                    InputStream is = conn.getInputStream();

                    File file = new File(mSavePath);
                    // 判斷文件目錄是否存在
                    if (!file.exists()) {
                        file.mkdir();
                    }
                    File apkFile = new File(mSavePath, mHashMap.get("name"));
                    FileOutputStream fos = new FileOutputStream(apkFile);
                    int count = 0;
                    // 緩存
                    byte buf[] = new byte[1024];
                    // 寫入到文件中
                    do {
                        int numread = is.read(buf);
                        count += numread;
                        // 計算進度條位置
                        progress = (int) (((float) count / length) * 100);
                        // 更新進度
                        mHandler.sendEmptyMessage(DOWNLOAD);
                        if (numread <= 0) {
                            // 下載完成
                            mHandler.sendEmptyMessage(DOWNLOAD_FINISH);
                            break;
                        }
                        // 寫入文件
                        fos.write(buf, 0, numread);
                    } while (!cancelUpdate);// 點擊取消就停止下載.
                    fos.close();
                    is.close();

                }
            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }
            // 取消下載對話框顯示
            mDownloadDialog.dismiss();
        }
    }

    ;

    /**
     * 安裝APK文件
     */
    private void installApk() {
        File apkfile = new File(mSavePath, mHashMap.get("name"));
        if (!apkfile.exists()) {
            return;
        }
        // 通過Intent安裝APK文件
        Intent i = new Intent(Intent.ACTION_VIEW);
        i.setDataAndType(Uri.parse("file://" + apkfile.toString()), "application/vnd.android.package-archive");
        mContext.startActivity(i);
    }

    /**
     * 解析XML基類
     */
    public class ParseXmlService {
        public HashMap<String, String> parseXml(InputStream inStream) throws Exception {
            HashMap<String, String> hashMap = new HashMap<String, String>();

            // 實例化一個文檔構建器工廠
            DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
            // 通過文檔構建器工廠獲取一個文檔構建器
            DocumentBuilder builder = factory.newDocumentBuilder();
            // 通過文檔通過文檔構建器構建一個文檔實例
            Document document = builder.parse(inStream);
            // 獲取XML文件根節點
            Element root = document.getDocumentElement();
            // 獲得所有子節點
            NodeList childNodes = root.getChildNodes();
            for (int j = 0; j < childNodes.getLength(); j++) {
                // 遍歷子節點
                Node childNode = (Node) childNodes.item(j);
                if (childNode.getNodeType() == Node.ELEMENT_NODE) {
                    Element childElement = (Element) childNode;
                    // 版本號
                    if ("version".equals(childElement.getNodeName())) {
                        hashMap.put("version", childElement.getFirstChild().getNodeValue());
                    }
                    // 軟件名稱
                    else if (("name".equals(childElement.getNodeName()))) {
                        hashMap.put("name", childElement.getFirstChild().getNodeValue());
                    }
                    // 下載地址
                    else if (("url".equals(childElement.getNodeName()))) {
                        hashMap.put("url", childElement.getFirstChild().getNodeValue());
                    }
                }
            }
            return hashMap;
        }
    }

}