博客

android怎么做版本检测,android 实现检测版本，下载apk更新(附源码)

  • Post author:
  • Post category:其他


其实这不是什么难事了，都有热更新的技术了，只是记录一下，大神勿嘲笑。

先说下思路，首先要有更新的接口，只要进入app，就监测一下接口，是否更新，更新的话，检测本地版本是否低于接口返回的版本，低的话，就根据返回的路径下载apk更新。接口返回的字段起码有 更新标志、更新版本，更新描述，apk下载地址。

更新标志应该有三种状态，更新，询问更新，强制更新，可以启动一个Service(不要忘记在清单文件中注册)来进行检查更新以及下载的工作；

这下面就是 Service里的全部代码，也不是很难理解，重要的地方都有注释。写好Service后，在代码中 startService()启动就可以了。

这里面弹出了一个讯问框，需要在清单文件中 加入权限，  ，这是弹出全局讯问框的权限。

import android.app.AlertDialog;

import android.app.Dialog;

import android.app.Service;

import android.content.DialogInterface;

import android.content.Intent;

import android.content.pm.PackageInfo;

import android.content.pm.PackageManager;

import android.graphics.Color;

import android.net.Uri;

import android.os.Environment;

import android.os.Handler;

import android.os.IBinder;

import android.os.Message;

import android.support.annotation.Nullable;

import android.util.Log;

import android.view.LayoutInflater;

import android.view.View;

import android.view.WindowManager;

import android.widget.ProgressBar;

import android.widget.TextView;

import com.example.sdtz.wenmingweifang.R;

import com.example.sdtz.wenmingweifang.Tool.OkHttpUtil;

import com.example.sdtz.wenmingweifang.Util.App;

import com.example.sdtz.wenmingweifang.Util.MyUrl;

import org.json.JSONException;

import org.json.JSONObject;

import java.io.File;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.net.HttpURLConnection;

import java.net.URL;

/**

* Created by sdtz on 2017/7/1.

*/

public class UpdateService extends Service {

private ProgressBar mProgressBar;//进度条

private TextView tv1;

private TextView tv2;

private String url = MyUrl.Httpurl;

private String VersionCode;

private String result;

private App app;

private String mSavePath;//apk保存地址

private String mVersion_path;

private String mVersion_name = “app.apk”;//apk名

private float length;

private Dialog mDownloadDialog;//对话框

private int mProgress;//进度值

private static final int DOWNLOADING = 1;//apk下载中

private static final int DOWNLOAD_FINISH = 2;//apk下载完毕

private boolean mIsCancel = false;//是否取消下载标示符

@Nullable

@Override

public IBinder onBind(Intent intent) {

return null;

}

private Handler mUpdateProgressHandler = new Handler(){

public void handleMessage(Message msg) {

switch (msg.what){

case DOWNLOADING:

// 设置进度条

mProgressBar.setProgress(mProgress);

tv1.setText( mProgress + “/100”);

float len = length/1024/1024;//将length转换为M单位

float b = (float)(Math.round(len*100))/100;//保留两位小数点

tv2.setText( b+”M”);

break;

case DOWNLOAD_FINISH:

// 隐藏当前下载对话框

mDownloadDialog.dismiss();

// 安装 APK 文件

installAPK();

break;

default:

break;

}

};

};

@Override

public int onStartCommand(Intent intent, int flags, int startId) {

try {

VersionCode = getVersionName();

/* getJsonReuslt();*/

new OkHttpUtil().getJson(MyUrl.appdown, new OkHttpUtil.HttpCallBack() {

@Override

public void onSusscess(String data) throws JSONException {

JSONObject jo1 = new JSONObject(data);

app = new App();

app.setVersion(jo1.getString(“version”).toString());

app.setDescription(jo1.getString(“description”).toString());

app.setUrl(MyUrl.Httpurl+jo1.getString(“url”).toString());

app.setUpdate_flag(jo1.getString(“update_flag”).toString());

mVersion_path = app.getUrl();

//手机当前版本

String phoneVersion = VersionCode.substring(0,VersionCode.lastIndexOf(“.”));

Double jiekou = Double.parseDouble(app.getVersion());

Double bendi = null;

try {

bendi = Double.parseDouble(getVersionName());

} catch (Exception e) {

e.printStackTrace();

}

Log.d(“==”,”接口：”+jiekou+”本地：”+bendi+”::”+app.toString());

//本地版本 与 接口返回版本 不一致，并且 更新标志为1 ，则更新

if( !VersionCode.equals(app.getVersion()) && (jiekou>bendi) && app.getUpdate_flag().equals(“1”)){

Log.d(“==”,”::进入”);

showDialog(app.getDescription());

}else if( !VersionCode.equals(app.getVersion()) && (jiekou>bendi) && app.getUpdate_flag().equals(“2”)){

showDownloadDialog();

}

}

});

} catch (Exception e) {

e.printStackTrace();

} catch (Throwable throwable) {

throwable.printStackTrace();

}

return super.onStartCommand(intent, flags, startId);

}

/*

* 获取当前程序的版本号

*/

private String getVersionName() throws Exception{

//获取packagemanager的实例

PackageManager packageManager = getPackageManager();

//getPackageName()是你当前类的包名，0代表是获取版本信息

PackageInfo packInfo = packageManager.getPackageInfo(getPackageName(), 0);

return packInfo.versionName;

}

private void showDialog(String drc) {

final AlertDialog.Builder builder = new AlertDialog.Builder(this,AlertDialog.THEME_HOLO_LIGHT);

builder.setMessage(drc);

builder.setPositiveButton(“确定”, new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialogInterface, int i) {

showDownloadDialog();

}

});

builder.setNegativeButton(“取消”, new DialogInterface.OnClickListener() {

@Override

public void onClick(DialogInterface dialogInterface, int i) {

dialogInterface.dismiss();

}

});

AlertDialog alertDialog = builder.create();

alertDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);

alertDialog.setCanceledOnTouchOutside(true);

alertDialog.show();

alertDialog.getButton(alertDialog.BUTTON_POSITIVE).setTextColor(Color.GREEN);

alertDialog.getButton(alertDialog.BUTTON_NEGATIVE).setTextColor(Color.RED);

}

/*

* 开启新线程下载文件

*/

private void downloadAPK() {

new Thread(new Runnable() {

@Override

public void run() {

try{//检查sd是否挂载

if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){

String sdPath = Environment.getExternalStorageDirectory() + “/”;

mSavePath = sdPath + “WenmingDownload”;

File dir = new File(mSavePath);

if (!dir.exists())

dir.mkdir();

// 下载文件

HttpURLConnection conn = (HttpURLConnection) new URL(mVersion_path).openConnection();

conn.connect();

InputStream is = conn.getInputStream();

length = conn.getContentLength();

File apkFile = new File(mSavePath, mVersion_name);

FileOutputStream fos = new FileOutputStream(apkFile);

int count = 0;

byte[] buffer = new byte[1024];

while (!mIsCancel){

int numread = is.read(buffer);

count += numread;

// 计算进度条的当前位置

mProgress = (int) ((count/length) * 100);

// 更新进度条

mUpdateProgressHandler.sendEmptyMessage(DOWNLOADING);

// 下载完成

if (numread < 0){

mUpdateProgressHandler.sendEmptyMessage(DOWNLOAD_FINISH);

break;

}

fos.write(buffer, 0, numread);

}

fos.close();

is.close();

}

}catch(Exception e){

e.printStackTrace();

}

}

}).start();

}

/*

* 下载到本地后执行安装

*/

protected void installAPK() {

File apkFile = new File(mSavePath, mVersion_name);

if (!apkFile.exists())

return;

Intent intent = new Intent(Intent.ACTION_VIEW);

Uri uri = Uri.parse(“file://” + apkFile.toString());

intent.setDataAndType(uri, “application/vnd.android.package-archive”);

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

this.startActivity(intent);

}

/*

* 显示正在下载对话框

*/

protected void showDownloadDialog() {

AlertDialog.Builder builder = new AlertDialog.Builder(this);

builder.setTitle(“版本更新，下载中。。。”);

View view = LayoutInflater.from(this).inflate(R.layout.dialog_progress, null);

mProgressBar = (ProgressBar) view.findViewById(R.id.id_progress);

tv1 = (TextView) view.findViewById(R.id.tv1);

tv2 = (TextView) view.findViewById(R.id.tv2);

builder.setView(view);

mDownloadDialog = builder.create();

mDownloadDialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);

mDownloadDialog.show();

// 下载文件

downloadAPK();

}

}