安卓app更新

接上一個獲取文件大小的，這個內容是app更新了。

else if (v.getId() == R.id.llRefresh) {
    //發送請求前，先判斷網絡是否可用。
    if (UIHelp.isNetworkConnected(getActivity())) {
        UpdateTask task = new UpdateTask();
        task.execute();
    } else {
        UIHelp.showToast(getActivity(), getActivity().getString(R.string.no_network));
    }

UIHelp.isNetworkConnected(getActivity()是個人工具類用於檢查是否有網絡。

UIHelp.showToast()是我工具類裏面彈吐司的。

UpdateTask 的異步類：

private class UpdateTask extends AsyncTask<String, String, String> {
    @Override
    protected String doInBackground(String... params) {
        return ws.Update();
    }

    @Override
    protected void onPostExecute(final String s) {
        super.onPostExecute(s);
        pd.dismiss();
        Log.v(TAG, "result" + s);
        new Thread() {
            @Override
            public void run() {
                Looper.prepare();
                UpdateManager manager = new UpdateManager(getActivity(), s);
                // 檢查軟件更新
                manager.checkUpdate();
                Looper.loop();
            }
        }.start();
    }

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        pd.setProgressStyle(ProgressDialog.STYLE_SPINNER);
        pd.setMessage("正在獲取最新版本信息....");
        pd.setCancelable(false);
        pd.show();
    }

    @Override
    protected void onCancelled() {
        super.onCancelled();
        pd.dismiss();
    }
}

doInBackground方法裏面請求的方法Update()：

public String Update(){
    String url = "http://218.77.13.42:81/version.xml";
    SyncHttpClient client = new SyncHttpClient();
    return client.post(url);
}

 總之這個方法就是去發請求的。。。

UpdateManager manager = new UpdateManager(getActivity(), s);
                // 檢查軟件更新
                manager.checkUpdate();

這裏在onPostExecute方法裏面獲得的s經過構造函數傳入。

s實際上是一個版本的xml，String類型的。

UpdateManager 整個類以下：

package com.rb.huaihua.util.update;

import android.app.AlertDialog;
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;
import android.net.Uri;
import android.os.Environment;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.TextView;

import com.rb.huaihua.R;
import com.rb.huaihua.util.UIHelp;

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;

/**
 * Created by Administrator on 2015/10/10.
 */
public class UpdateManager  {
    /* 下載中 */
    private static final int DOWNLOAD = 1;
    /* 下載結束 */
    private static final int DOWNLOAD_FINISH = 2;
    private static final String TAG = UpdateManager.class.getSimpleName();
    /* 保存解析的XML信息 */
    HashMap<String, String> mHashMap;
    /* 是否取消更新 */
    private boolean cancelUpdate = false;
    /* 下載保存路徑 */
    public static String mSavePath = Environment.getExternalStorageDirectory() + File.separator
    +"richbond"+File.separator+"xssb"+File.separator;
    /* 記錄進度條數量 */
    private int progress;
    private Context mContext;
    private ProgressBar mProgress;
    private TextView update_data;
    private Dialog mDownloadDialog;
    private static String apkFilePath = "";
    private String str;//讀取到的xml
    /*用於更新進度條、安裝文件*/
    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);
                    update_data.setText(progress+"%");
                    break;
                case DOWNLOAD_FINISH:
                    // 安裝文件
                    installApk(apkFilePath);
                    break;
                default:
                    break;
            }
        };
    };

    public UpdateManager(Context context,String str)
    {
        this.mContext = context;
        this.str=str;
    }

    /**
     * 檢測軟件更新
     */
    public void checkUpdate()
    {
        if (isUpdate())
        {
            // 顯示提示對話框
            showNoticeDialog();
        } else
        {
            UIHelp.showToast(mContext, mContext.getString(R.string.soft_update_no));
        }
    }
    /**
     * 檢查軟件是否有更新版本
     *
     * @return
     */
    private boolean isUpdate()
    {/**
     * 使用流讀取 classpath 下文件:
     * 1.Android Studio Terminal
     * 2.cd appname\src\main\java
     * 3.jar cvf xml.jar persons.xml
     * 4.move xml.jar E:\AndroidStudio\Projects\Apps\appname\libs
     */
        // 獲取當前軟件版本
        int versionCode = getVersionCode(mContext);
        Log.v(TAG,"versionCode = "+versionCode);
        // 把version.xml放到網絡上，而後獲取文件信息
        try {
            //InputStream inStream = mContext.getAssets().open("version.xml");
            //InputStream inStream = mContext.getAssets().open("version.xml");
            /*String str = "<update>\n" +
                    "\t<version>2</version>\n" +
                    "\t<name>baidu_xinwen_1.1.0</name>\n" +
                    "\t<url>http://gdown.baidu.com/data/wisegame/f98d235e39e29031/baiduxinwen.apk</url>\n" +
                    "</update>";*/
            ByteArrayInputStream inStream = new ByteArrayInputStream(str.getBytes());
            Log.v(TAG,"is = "+inStream);

        //InputStream inStream = getClass().getClassLoader().getResourceAsStream("version.xml");
        //Log.v(TAG,"inStream = "+inStream);
        // 解析XML文件。 因爲XML文件比較小，所以使用DOM方式進行解析
        ParseXmlService service = new ParseXmlService();

            mHashMap = service.parseXml(inStream);

        } catch (Exception e)
        {
            e.printStackTrace();
        }
        if (null != mHashMap)
        {
            Log.v(TAG,"mHashMap = "+mHashMap.toString());
            int serviceCode = Integer.valueOf(mHashMap.get("version"));
            // 版本判斷
            if (serviceCode > versionCode)
            {
                return true;
            }
        }

        return false;
    }

    /**
     * 獲取軟件版本號
     *
     * @param context
     * @return
     */
    public 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 (PackageManager.NameNotFoundException e) {
            e.printStackTrace();
        }
        return versionCode;
    }

    /**
     * 顯示軟件更新對話框
     */
    private void showNoticeDialog()
    {
        // 構造對話框
        AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
        builder.setTitle(R.string.soft_update_title);
        builder.setMessage(R.string.soft_update_info);
        //按對話框之外的地方不起做用。按返回鍵也不起做用
        builder.setCancelable(false);
        // 更新
        builder.setPositiveButton(R.string.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(R.string.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
     */
    private void showDownloadDialog()
    {
        // 構造軟件下載對話框
        AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
        builder.setTitle(R.string.soft_updating);
        // 給下載對話框增長進度條
        final LayoutInflater inflater = LayoutInflater.from(mContext);
        View v = inflater.inflate(R.layout.softupdate_progress, null);
        mProgress = (ProgressBar) v.findViewById(R.id.update_progress);
        update_data = (TextView) v.findViewById(R.id.update_data);
        update_data.setText("0%");
        builder.setView(v);
        // 取消更新
        builder.setNegativeButton(R.string.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();
        //設置點擊外部時下載對話框不會消失
        mDownloadDialog.setCanceledOnTouchOutside(false);
        mDownloadDialog.show();
        // 下載文件
        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
     */
    private class downloadApkThread extends Thread
    {
        @Override
        public void run()
        {
            try
            {
                // 判斷SD卡是否存在，而且是否具備讀寫權限
                if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){
                    apkFilePath = mSavePath + mHashMap.get("name")+".apk";
                    Log.v(TAG,"mSavePath"+mSavePath);
                    URL url = new URL(mHashMap.get("url"));
                    Log.v(TAG,"url="+mHashMap.get("url"));
                    // 建立鏈接
                    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
                    conn.connect();
                    // 獲取文件大小
                    int length = conn.getContentLength();

                    File file = new File(mSavePath);
                    // 判斷文件目錄是否存在
                    if (!file.exists())
                    {
                        file.mkdir();
                    }

                    File apkFile = new File(apkFilePath);
                    if (apkFile.exists()){
                        if (apkFile.length()==length){
                            //安裝文件
                            installApk(apkFilePath);
                            mDownloadDialog.dismiss();
                            conn.disconnect();
                            return;
                        }
                        //刪除文件
                        apkFile.delete();
                    }
                    // 建立輸入流
                    InputStream is = conn.getInputStream();
                    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);// 點擊取消就中止下載.
                    conn.disconnect();
                    fos.close();
                    is.close();
                }
                else{
                    //吐司提示沒有sd卡
                    new Thread() {
                        @Override
                        public void run() {
                            Looper.prepare();
                            UIHelp.showToast(mContext, mContext.getString(R.string.no_sdCard));
                            Looper.loop();
                        }
                    }.start();

                }
            } catch (MalformedURLException e) {
                Log.v(TAG,"urlException進入了這個異常");
                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(String apkFilePath)
    {
        File apkfile = new File(apkFilePath);
        if (!apkfile.exists())
        {
            return;
        }
        // 經過Intent安裝APK文件
        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.setDataAndType(Uri.parse("file://" + apkfile.toString()), "application/vnd.android.package-archive");
        mContext.startActivity(intent);
        //apkfile.delete();
    }
    /**
     * 刪除apk文件
     */
    public static void deleteApk(){
        //File apkfile = new File(apkFilePath);///storage/sdcard0/richbond/xssb/xssb_1.1.0.apk
        File apkfile = new File("/storage/sdcard0/richbond/xssb/xssb_1.1.0.apk");
        if (!apkfile.exists())
        {
            return;
        }
        apkfile.delete();
    }
}