自制软件更新、下载、安装类BYupdate
类 BYupdate
简述：实现软件信息的展示和软件更新功能
- java.lang.Object
- cn.wangbaiyuan.tools.BYupdate
public class BYupdate
extends java.lang.Object
实现软件信息的展示和软件更新功能
作者:
王柏元
代码：
package cn.wangbaiyuan.tools;
import java.io.File;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
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.widget.Toast;
/**
* 实现软件信息的展示和软件更新功能
* @author 王柏元
*
*/
public class BYupdate {
String sw_version;
String current_version;
String version_des;
String url_path;
Context context;
String download_url;
/\*\*
\*
\* @param icontext context一般是引用此类的activity
\* @param url 软件更新服务处理地址
\* @param version 软件当前版本号
*/
public BYupdate(Context icontext,String url, String version){
context=icontext;
url_path=url;
current_version=version;
}
/\*\*
\* 设置软件更新服务处理地址
\* @param url
*/
public void setDownload_url(String url){
url_path=url;
}
Handler hander=new Handler(){
@Override
public void handleMessage(Message msg){
if(msg.what==0x123){
//version\_label.setText("最新版本："+sw\_version);
Double latest\_Version=Double.parseDouble(sw\_version);
if(Double.parseDouble(current\_version)<latest\_Version)
{
AlertDialog.Builder builder=new AlertDialog.Builder(context)
.setTitle("当前版本:"+current\_version+",最新版本:"+latest\_Version)
.setMessage(version_des);
builder.setPositiveButton("下载更新", download_listener);
builder.setNegativeButton("以后再说", null);
builder.create();
builder.show();
}
else
Toast.makeText(context, "当前是最新版本", 5).show();
}
else if(msg.what==012)
Toast.makeText(context, "安装包下载完成，进入安装……", Toast.LENGTH_LONG).show();
else if(msg.what==01244)
Toast.makeText(context, "下载错误……", Toast.LENGTH_LONG).show();
//最后toast出文件名，因为这个程序是单线程的，所以要下载完文件以后才会执行这一句，中间的时间类似于死机，不过多线程还没有学到
}
};
/\*\*
\* 检查更新
*/
public void checkupdate(){
new Thread(checkupdate).start();
Toast.makeText(context, "正在检查更新……", 2).show();
}
public OnClickListener download_listener =new OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
new Thread(download).start();
Toast.makeText(context, "开始下载……", Toast.LENGTH_LONG).show();
}
};
/\*\*
\* 下载线程
*/
Runnable download = new Runnable(){
@Override
public void run() {
String sdcard=Environment.getExternalStorageDirectory()+"/";
String filepath=sdcard+"BYLeavePaper/";
download\_url=(download\_url.startsWith("http://"))?download\_url:"http://"+download\_url;
try {
URL url = new URL(download_url);
//打开到url的连接
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
//以下为java IO部分，大体来说就是先检查文件夹是否存在，不存在则创建,然后的文件名重复问题，没有考虑
InputStream istream=connection.getInputStream();
String filename=download\_url.substring(download\_url.lastIndexOf("/")+1);
File dir=new File(filepath);
if (!dir.exists()) {
dir.mkdir();
}
File file=new File(filepath+filename);
file.createNewFile();
OutputStream output=new FileOutputStream(file);
byte\[\] buff = new byte\[1024\];
int hasRead = 0;
// 将URL对应的资源下载到本地
while((hasRead = istream.read(buff)) > 0)
{
output.write(buff, 0 , hasRead);
}
output.flush();
output.close();
istream.close();
hander.sendEmptyMessage(012);
Log.e("log_tag",file.toString());
openFile(file);
} catch (Exception e) {
Log.e("log_tag","下载错误:"+e.toString());
hander.sendEmptyMessage(01244);
}
}
};
/\*\*
\* 检查更新线程
*/
Runnable checkupdate = new Runnable(){
@Override
public void run() {
String jsonString = BYHttpGet.getJsonContent(url_path);
Log.e("bypaperup",jsonString);
try {
JSONObject Json=new JSONObject(jsonString);
sw\_version=Json.getString("sw\_version");
version\_des=Json.getString("sw\_description");
download\_url=Json.getString("sw\_url");
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
Log.e("log_tag",e.toString());
}
hander.sendEmptyMessage(0x123);
}
};
/**
* 打开指定APK
* @param file APK路径
*/
private void openFile(File file) {
Log.e(“OpenFile”, file.getName());
Intent intent = new Intent();
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
intent.setAction(android.content.Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file),
“application/vnd.android.package-archive”);
context.startActivity(intent);
}
}