安卓实现在线更新

////////////////////2016/04/25//////////////////////

///////////////////by XBW///////////////////////////

//////////////////环境 eclipse api22///////////

做点贡献，发几个小demo，每次启动某个app都会遇到app升级，这是怎么实现的呢，先上图吧，

有图有真相，

这截图真大，没睡了，

结构。

Config.java

package com.example.update;public class Config {public static String mysql_url_update="http://127.0.0.1/androidapp/appupdate/update.txt";//服务器端更新url；}

FileUtil.java

package com.example.update;import java.io.File;import java.io.IOException;import android.os.Environment;public class FileUtil {public static File updateDir = null;public static File updateFile = null;public static final String Application = "konkaUpdateApplication";public static boolean isCreateFileSucess;public static void createFile(String app_name) {if (android.os.Environment.MEDIA_MOUNTED.equals(android.os.Environment.getExternalStorageState())) {isCreateFileSucess = true;updateDir = new File(Environment.getExternalStorageDirectory()+ "/" +Application +"/");updateFile = new File(updateDir + "/" + app_name + ".apk");if (!updateDir.exists()) {updateDir.mkdirs();}if (!updateFile.exists()) {try {updateFile.createNewFile();} catch (IOException e) {isCreateFileSucess = false;e.printStackTrace();}}}else{isCreateFileSucess = false;}}}

GetVersion.java

package com.example.update;import android.content.Context;import android.content.pm.PackageInfo;import android.content.pm.PackageManager;import android.content.pm.PackageManager.NameNotFoundException;public class GetVersion {// 获取当前版本的版本号public String getVersion(Context context) {try {PackageManager packageManager = context.getPackageManager();PackageInfo packageInfo = packageManager.getPackageInfo(context.getPackageName(), 0);return packageInfo.versionName;} catch (NameNotFoundException e) {e.printStackTrace();return "版本号未知";}}}

IsNeedUpdate.java

package com.example.update;import android.content.Context;public class IsNeedUpdate {private UpdateInfo info;public IsNeedUpdate(Context context){UpdateInfoService updateInfoService = new UpdateInfoService(context);try {info = updateInfoService.getUpDateInfo();} catch (Exception e) {// TODO 自动生成�? catch �?e.printStackTrace();}}public boolean isNeedUpdate(Context context) { GetVersion version=new GetVersion(); //版本更新检测使用浮点型存在小版本问题，浮点型不能识别v 1.2.1这种小版本 //double webVersion=Double.parseDouble(info.getVersion());// double localVersion=Double.parseDouble(version.getVersion(context)); //采用比较字典序大小检测版本更新if (info.getVersion().compareTo(version.getVersion(context))>0) {return true;} else {return false;}}public String getDescribe(){return info.getDescription();}public String getUrl(){return info.getUrl();}}

ShowUpdateDialog.java

package com.example.update;import android.app.AlertDialog;import android.app.Dialog;import android.content.Context;import android.content.Intent;import android.os.Environment;import android.text.method.ScrollingMovementMethod;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.ImageButton;import android.widget.RelativeLayout;import android.widget.TextView;import android.widget.Toast;public class ShowUpdateDialog{private UpdateInfo info;//更新窗口public Dialog showUpdateDialog(final Context context,String msg,final String url) {LayoutInflater layoutInflater =LayoutInflater.from(context);RelativeLayout layout = (RelativeLayout)layoutInflater.inflate(R.layout.dialog, null );final Dialog dialog = new AlertDialog.Builder(context).create();    dialog.show();    dialog.getWindow().setContentView(layout);    TextView tex=(TextView)layout.findViewById(R.id.dialog_text);    TextView tex1=(TextView)layout.findViewById(R.id.textView_title);    tex.setMovementMethod(ScrollingMovementMethod.getInstance());     tex.setText(msg);    tex1.setText("更新提示");         //确定按钮         Button btnOK = (Button) layout.findViewById(R.id.dialog_ok);         btnOK.setOnClickListener(new OnClickListener() {                    @Override            public void onClick(View v) {            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {           //services.service();           Intent intent = new Intent(context,UpdateServices.class);           intent.putExtra("Key_App_Name",context.getString(R.string.app_name));           intent.putExtra("Key_Down_Url",url);           context.startService(intent);} else {Toast.makeText(context, "SD卡不可用，请插入SD卡",Toast.LENGTH_SHORT).show();}           dialog.dismiss();               }         });          //关闭按钮         ImageButton btnClose = (ImageButton) layout.findViewById(R.id.dialog_close);         btnClose.setOnClickListener(new OnClickListener() {                     @Override           public void onClick(View v) {              dialog.dismiss();                     }         });         return dialog;     }//不更新窗口public Dialog showDialog(final Context context) {LayoutInflater layoutInflater =LayoutInflater.from(context);RelativeLayout layout = (RelativeLayout)layoutInflater.inflate(R.layout.dialog, null );final Dialog dialog = new AlertDialog.Builder(context).create();    dialog.show();    dialog.getWindow().setContentView(layout);    TextView tex=(TextView)layout.findViewById(R.id.dialog_text);    TextView tex1=(TextView)layout.findViewById(R.id.textView_title);    GetVersion version=new GetVersion();    tex.setText("您使用的是最新版:"+version.getVersion(context)+"版本");    tex1.setText("更新提示");    Button btnOK = (Button) layout.findViewById(R.id.dialog_ok);    btnOK.setVisibility(View.INVISIBLE);  //关闭按钮         ImageButton btnClose = (ImageButton) layout.findViewById(R.id.dialog_close);         btnClose.setOnClickListener(new OnClickListener() {                     @Override           public void onClick(View v) {              dialog.dismiss();                     }         });         return dialog;}}

UpdateInfo.java

package com.example.update;public class UpdateInfo{        private String version;        private String description;        private String url;        public String getVersion()        {                return version;        }        public void setVersion(String version)        {                this.version = version;        }        public String getDescription()        {                return description;        }        public void setDescription(String description)        {                this.description = description;        }        public String getUrl()        {                return url;        }        public void setUrl(String url)        {                this.url = url;        }}

UpdateInfoService.java

package com.example.update;import java.io.BufferedReader;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;import android.content.Context;public class UpdateInfoService {public UpdateInfoService(Context context) {}public UpdateInfo getUpDateInfo() throws Exception {String path = Config.mysql_url_update;StringBuffer sb = new StringBuffer();String line = null;BufferedReader reader = null;UpdateInfo updateInfo = new UpdateInfo();try {// 创建�?个url对象URL url = new URL(path);// 通過url对象，创建一个HttpURLConnection对象（连接）HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();// 通过HttpURLConnection对象，得到InputStreamreader = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));// 使用io流读取文�?while ((line = reader.readLine()) != null) {sb.append(line);}} catch (Exception e) {e.printStackTrace();} finally {try {if (reader != null) {reader.close();}} catch (Exception e) {e.printStackTrace();}}String info = sb.toString();updateInfo.setVersion(info.split("&")[1]);updateInfo.setDescription(info.split("&")[2]);updateInfo.setUrl(info.split("&")[3]);return updateInfo;}}

才发现csdn博客还有长度限制，发了好几次都被截断了，这样吧，

直接传送demo，或者去我小站看一下吧

demo传送门

小站

小站demo下载不需要积分哦