Android强制更新

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Android版本强制更新

package com.lianpos.util;

import android.content.Context;

import android.content.DialogInterface;

import android.content.Intent;

import android.net.Uri;

import android.os.Handler;

import android.os.Message;

import android.support.v7.app.AlertDialog;

import android.view.LayoutInflater;

import android.view.View;

import android.widget.ProgressBar;

import android.widget.Toast;

import com.lianpos.activity.R;

import java.io.File;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.URL;

/**

 * Created by Administrator on 2018/1/2 0002.

 */

public class UpdateManager {

    private Context mContext; //上下文

    private String apkUrl = ResultUtils.versionUrlValue; //apk下载地址

    private static final String savePath = "/sdcard/updateAPK/"; //apk保存到SD卡的路径

    private static final String saveFileName = savePath + "apkName.apk"; //完整路径名

    private ProgressBar mProgress; //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 double serverVersion = 2.0; //从服务器获取的版本号

//    private double clientVersion = 1.0; //客户端当前的版本号

    private String updateDescription = "更新描述"; //更新内容描述信息

    private boolean forceUpdate = true; //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) {

        this.mContext = context;

    }

    /** 显示更新对话框 */

    public void showNoticeDialog(double serverVersion,double clientVersion) {

        //如果版本最新，则不需要更新

        if (serverVersion <= 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) {

                arg0.dismiss();

                showDownloadDialog();

            }

        });

        //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) {

                    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);

        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) {

                    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() {

                try {

                    URL url = new URL(apkUrl);

                    HttpURLConnection conn = (HttpURLConnection) url.openConnection();

                    conn.connect();

                    int length = conn.getContentLength();

                    InputStream is = conn.getInputStream();

                    File file = new File(savePath);

                    if(!file.exists()){

                        file.mkdir();

                    }

                    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();

                }

            }

        }).start();

    }

    /** 更新UI的handler */

    private Handler mHandler = new Handler() {

        @Override

        public void handleMessage(Message msg) {

            switch (msg.what) {

                case DOWNLOADING:

                    mProgress.setProgress(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);

    }

}

　　使用方法：

//这里来检测版本是否需要更新

mUpdateManager = new UpdateManager(this);

mUpdateManager.showNoticeDialog();