Android的APP强制更新

这是manager的代码，里面包含软件的下载以及安装流程

package com.sf.manager;import android.app.AlertDialog;import android.content.Context;import android.content.DialogInterface;import android.content.Intent;import android.net.Uri;import android.os.Environment;import android.os.Handler;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 android.widget.Toast;import com.sf.R;import com.sf.MyActivityManager;import com.sf.MyApplication;import java.io.File;import java.io.FileOutputStream;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.URL;/** * Created by Administrator on 2016/12/20. */public class UpdateManager {    private Context mContext; //上下文    private String apkUrl =            "**********************"; //apk下载地址    private  String savePath; //apk保存到SD卡的路径    private  String saveFileName; //完整路径名    private ProgressBar mProgress; //下载进度条控件    private TextView tvProgress; //下载进度条控件    private static final int DOWNLOADING = 1; //表示正在下载    private static final int DOWNLOADED = 2; //下载完毕    private static final int DOWNLOAD_FAILED = 3; //下载失败    private int progress; //下载进度    private boolean cancelFlag = false; //取消下载标志位    private String serverVersion; //从服务器获取的版本号    private String clientVersion; //客户端当前的版本号    private String updateDescription = "*****发现新版本，是否更新"; //更新内容描述信息    private boolean forceUpdate; //是否强制更新    private AlertDialog alertDialog1, alertDialog2; //表示提示对话框、进度条对话框    /** 构造函数 */    public UpdateManager(Context context,String serverVersion,String clientVersion,boolean forceUpdate) {        this.mContext = context;        this.serverVersion=serverVersion;        this.clientVersion=clientVersion;        this.forceUpdate=forceUpdate;    }    /** 显示更新对话框 */    public void showNoticeDialog() {        //如果版本最新，则不需要更新        if (serverVersion.equals(clientVersion))            return;        AlertDialog.Builder dialog = new AlertDialog.Builder(mContext);        dialog.setTitle("发现新版本 ：" + serverVersion);        dialog.setMessage(updateDescription);        dialog.setPositiveButton("现在更新", new DialogInterface.OnClickListener() {            @Override            public void onClick(DialogInterface arg0, int arg1) {                // TODO Auto-generated method stub                arg0.dismiss();                showDownloadDialog();            }        });        if (forceUpdate == true) {            dialog.setNegativeButton("下次更新", new DialogInterface.OnClickListener() {                @Override                public void onClick(DialogInterface dialogInterface, int i) {                    MyActivityManager.finishAll();                    MyApplication.exit();                }            });        }        //是否强制更新        if (forceUpdate == false) {            dialog.setNegativeButton("待会更新", new DialogInterface.OnClickListener() {                @Override                public void onClick(DialogInterface arg0, int arg1) {                    // TODO Auto-generated method stub                    arg0.dismiss();                }            });        }        alertDialog1  = dialog.create();        alertDialog1.setCancelable(false);        alertDialog1.show();    }    /** 显示进度条对话框 */    public void showDownloadDialog() {        AlertDialog.Builder dialog = new AlertDialog.Builder(mContext);        dialog.setTitle("正在更新");        final LayoutInflater inflater = LayoutInflater.from(mContext);        View v = inflater.inflate(R.layout.softupdate_progress, null);        mProgress = (ProgressBar) v.findViewById(R.id.update_progress);        tvProgress = (TextView) v.findViewById(R.id.tv_progress);        dialog.setView(v);        //如果是强制更新，则不显示取消按钮        if (forceUpdate == false) {            dialog.setNegativeButton("取消", new DialogInterface.OnClickListener() {                @Override                public void onClick(DialogInterface arg0, int arg1) {                    // TODO Auto-generated method stub                    arg0.dismiss();                    cancelFlag = false;                }            });        }        alertDialog2  = dialog.create();        alertDialog2.setCancelable(false);        alertDialog2.show();        //下载apk        downloadAPK();    }    /** 下载apk的线程 */    public void downloadAPK() {        new Thread(new Runnable() {            @Override            public void run() {                // TODO Auto-generated method stub                try {                    URL url = new URL(apkUrl);                    HttpURLConnection conn = (HttpURLConnection) url.openConnection();                    conn.connect();                    int length = conn.getContentLength();                    InputStream is = conn.getInputStream();                    savePath = getSDPath()+"/updateAPK/";                    File file = new File(savePath);                    if(!file.exists()){                        file.mkdir();                    }                    saveFileName = savePath +serverVersion+ "apkName.apk";                    String apkFile = saveFileName;                    File ApkFile = new File(apkFile);                    FileOutputStream fos = new FileOutputStream(ApkFile);                    int count = 0;                    byte buf[] = new byte[1024];                    do{                        int numread = is.read(buf);                        count += numread;                        progress = (int)(((float)count / length) * 100);                        //更新进度                        mHandler.sendEmptyMessage(DOWNLOADING);                        if(numread <= 0){                            //下载完成通知安装                            mHandler.sendEmptyMessage(DOWNLOADED);                            break;                        }                        fos.write(buf, 0, numread);                    }while(!cancelFlag); //点击取消就停止下载.                    fos.close();                    is.close();                } catch(Exception e) {                    mHandler.sendEmptyMessage(DOWNLOAD_FAILED);                    e.printStackTrace();                    Log.e("eeeeeeeeeee",e.getMessage());                }            }        }).start();    }    /**     * 获取SD path     *     * @return     */    public String getSDPath() {        File sdDir = null;        boolean sdCardExist = Environment.getExternalStorageState().equals(                Environment.MEDIA_MOUNTED); // 判断sd卡是否存在        if (sdCardExist) {            sdDir = Environment.getExternalStorageDirectory();// 获取跟目录            // Toast.makeText(this,sdDir.toString(),Toast.LENGTH_LONG).show();            return sdDir.toString();        } else {            Toast.makeText(mContext, "没有SD卡", Toast.LENGTH_LONG).show();        }        return null;    }    /** 更新UI的handler */    private Handler mHandler = new Handler() {        @Override        public void handleMessage(Message msg) {            // TODO Auto-generated method stub            switch (msg.what) {                case DOWNLOADING:                    mProgress.setProgress(progress);                    tvProgress.setText(progress+"%");                    break;                case DOWNLOADED:                    if (alertDialog2 != null)                        alertDialog2.dismiss();                    installAPK();                    break;                case DOWNLOAD_FAILED:                    Toast.makeText(mContext, "网络断开，请稍候再试", Toast.LENGTH_LONG).show();                    break;                default:                    break;            }        }    };    /** 下载完成后自动安装apk */    public void installAPK() {        File apkFile = new File(saveFileName);        if (!apkFile.exists()) {            return;        }        Intent intent = new Intent(Intent.ACTION_VIEW);        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);        intent.setDataAndType(Uri.parse("file://" + apkFile.toString()), "application/vnd.android.package-archive");        mContext.startActivity(intent);        MyActivityManager.finishAll();        MyApplication.exit();    }}

//这是dialog布局代码

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="wrap_content">    <ProgressBar        android:id="@+id/update_progress"        style="?android:attr/progressBarStyleHorizontal"        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:layout_centerHorizontal="true" />    <TextView        android:id="@+id/tv_progress"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_below="@id/update_progress"        android:layout_alignParentRight="true"        android:layout_margin="5dp"        android:textSize="@dimen/app_bigtext"        android:text="0%"/></RelativeLayout>

//这是主函数中调取manager的主要方法

if ("获取软件版本code" < "服务器获取的code") {    SharedPreferencesUtils.saveBoolean(getApplicationContext(), "AppNew", true);    mUpdateManager = new UpdateManager(IndexActivity.this, "服务器获取的版本号", "获取软件的版本号", true);    mUpdateManager.showNoticeDialog();} else {    SharedPreferencesUtils.saveBoolean(getApplicationContext(), "AppNew", false);}

//获取软件code

private int getAppCode() {    try {        String pkName = this.getPackageName();        int versionCode = this.getPackageManager().getPackageInfo(                pkName, 0).versionCode;        return versionCode;    } catch (Exception e) {    }    return -1;}//获取软件版本号private String getAppInfo() {    try {        String pkName = this.getPackageName();        String versionName = this.getPackageManager().getPackageInfo(                pkName, 0).versionName;        return versionName;    } catch (Exception e) {    }    return null;}