android关于版本更新问题

在Android中，检测版本更新是每个app很常见的功能，我们也尝试简单实现一下吧~

布局代码这里就不需要写了，一个按钮即可检测更新，这里我是以一个gson文件作为示例请求比对版本...

第一步解析数据：

//请求网络服务器上的版本
final String url="http://192.168.253.2:8080/gson/banbenwenjian.json";

HttpUtils utils=new HttpUtils();

utils.configTimeout(5000);

utils.send(HttpMethod.GET, url, new RequestCallBack<String>() {

@Override
public void onFailure(HttpException arg0, String arg1) {
// TODO Auto-generated method stub

}

@Override
public void onSuccess(ResponseInfo<String> arg0) {
// TODO Auto-generated method stub

mNetData = arg0.result;
Gson gson=new Gson();
banben = gson.fromJson(mNetData, Banben.class);
mUrl1 = banben.getUrl();
mName = banben.getName();
mVersion = banben.getVersion();

handler.sendEmptyMessage(0);
}
});

handler接受 通过构造方法将数据传到UpdateManager类

private Handler handler=new Handler(){
public void handleMessage(android.os.Message msg) {
Log.d("u", mUrl1+mName+mVersion);
UpdateManager manager = new UpdateManager(getActivity(),mUrl1,mName,mVersion);
manager.checkUpdate();
};
};

-------------------------解析bean类------------

public class Banben implements Serializable{

private String version;
private String name;
private String url;
public String getVersion() {
return version;
}
public void setVersion(String version) {
this.version = version;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
@Override
public String toString() {
return "Banben [version=" + version + ", name=" + name + ", url=" + url
+ "]";
}

}

-----------------------------UpdateManager-------------------

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import com.hao.happyshoppingapp.R;
import com.seven.bean.Banben;

import android.app.AlertDialog;
import android.app.Dialog;
import android.app.AlertDialog.Builder;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.DialogInterface.OnClickListener;
import android.content.pm.PackageManager.NameNotFoundException;
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.Toast;
public class UpdateManager {
/* 下载中 */
private static final int DOWNLOAD = 1;
/* 下载结束 */
private static final int DOWNLOAD_FINISH = 2;
/* 下载保存路径 */
private String mSavePath;
/* 记录进度条数量 */
private int progress;
/* 是否取消更新 */
private boolean cancelUpdate = false;

private Context mContext;
/* 更新进度条 */
private ProgressBar mProgress;
private Banben banben;
private Dialog mDownloadDialog;
private String url1;
private String name;
private String version;

private Handler mHandler = new Handler()
{
public void handleMessage(Message msg)
{
switch (msg.what)
{
// 正在下载
case DOWNLOAD:
// 设置进度条位置
mProgress.setProgress(progress);
break;
case DOWNLOAD_FINISH:
// 安装文件
installApk();
break;
default:
break;
}
};
};

public UpdateManager(Context mContext, String url1, String name,
String version) {
super();
this.mContext = mContext;
this.url1 = url1;
this.name = name;
this.version = version;
}

/**
* 检测软件更新
*/
public void checkUpdate()
{
if (isUpdate())
{
showNoticeDialog();
// 显示提示对话框
} else
{
Toast.makeText(mContext, R.string.soft_update_no, Toast.LENGTH_LONG).show();
}
}

/**
* 检查软件是否有更新版本
*
* @return
*/
private boolean isUpdate()
{
// 获取当前软件版本
int versionCode = getVersionCode(mContext);
Log.d("versionCode", versionCode+"");

if (null != name)
{
int serviceCode = Integer.valueOf(version);
// 版本判断
if (serviceCode > versionCode)
{
return true;
}
}
return false;
}

private void request_serverban() {
// TODO Auto-generated method stub
Toast.makeText(mContext, "执行到了", 0).show();

}

/**
* 获取软件版本号
*
* @param context
* @return
*/
private int getVersionCode(Context context)
{
int versionCode = 0;
try
{
// 获取软件版本号，对应AndroidManifest.xml下android:versionCode
versionCode = context.getPackageManager().getPackageInfo("com.hao.happyshoppingapp", 0).versionCode;
} catch (NameNotFoundException e)
{
e.printStackTrace();
}
return versionCode;
}

/**
* 显示软件更新对话框
*/
private void showNoticeDialog()
{
// 构造对话框
AlertDialog.Builder builder = new Builder(mContext);
builder.setTitle(R.string.soft_update_title);
builder.setMessage(R.string.soft_update_info);
// 更新
builder.setPositiveButton(R.string.soft_update_updatebtn, new OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int which)
{
dialog.dismiss();
// 显示下载对话框
showDownloadDialog();
}
});
// 稍后更新
builder.setNegativeButton(R.string.soft_update_later, new OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int which)
{
dialog.dismiss();
}
});
Dialog noticeDialog = builder.create();
noticeDialog.show();
}

/**
* 显示软件下载对话框
*/
private void showDownloadDialog()
{
// 构造软件下载对话框
AlertDialog.Builder builder = new Builder(mContext);
builder.setTitle(R.string.soft_updating);
// 给下载对话框增加进度条
final LayoutInflater inflater = LayoutInflater.from(mContext);
View v = inflater.inflate(R.layout.softupdate_progress, null);
mProgress = (ProgressBar) v.findViewById(R.id.update_progress);
builder.setView(v);
// 取消更新
builder.setNegativeButton(R.string.soft_update_cancel, new OnClickListener()
{
@Override
public void onClick(DialogInterface dialog, int which)
{
dialog.dismiss();
// 设置取消状态
cancelUpdate = true;
}
});
mDownloadDialog = builder.create();
mDownloadDialog.show();
// 现在文件
downloadApk();
}

/**
* 下载apk文件
*/
private void downloadApk()
{
// 启动新线程下载软件
new downloadApkThread().start();
}

/**
* 下载文件线程
*
* @author coolszy
*@date 2012-4-26
*@blog http://blog.92coding.com */
private class downloadApkThread extends Thread
{
@Override
public void run()
{
try
{
// 判断SD卡是否存在，并且是否具有读写权限
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED))
{
// 获得存储卡的路径
String sdpath = Environment.getExternalStorageDirectory() + "/";
mSavePath = sdpath + "download";
URL url = new URL(url1);
// 创建连接
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.connect();
// 获取文件大小
int length = conn.getContentLength();
// 创建输入流
InputStream is = conn.getInputStream();

File file = new File(mSavePath);
// 判断文件目录是否存在
if (!file.exists())
{
file.mkdir();
}
File apkFile = new File(mSavePath, name);
FileOutputStream fos = new FileOutputStream(apkFile);
int count = 0;
// 缓存
byte buf[] = new byte[1024];
// 写入到文件中
do
{
int numread = is.read(buf);
count += numread;
// 计算进度条位置
progress = (int) (((float) count / length) * 100);
// 更新进度
mHandler.sendEmptyMessage(DOWNLOAD);
if (numread <= 0)
{
// 下载完成
mHandler.sendEmptyMessage(DOWNLOAD_FINISH);
break;
}
// 写入文件
fos.write(buf, 0, numread);
} while (!cancelUpdate);// 点击取消就停止下载.
fos.close();
is.close();
}
} catch (MalformedURLException e)
{
e.printStackTrace();
} catch (IOException e)
{
e.printStackTrace();
}
// 取消下载对话框显示
mDownloadDialog.dismiss();
}
};

/**
* 安装APK文件
*/
private void installApk()
{
File apkfile = new File(mSavePath, name);
if (!apkfile.exists())
{
return;
}
// 通过Intent安装APK文件
Intent i = new Intent(Intent.ACTION_VIEW);
i.setDataAndType(Uri.parse("file://" + apkfile.toString()), "application/vnd.android.package-archive");
mContext.startActivity(i);
}
}

{
"name": "HappyShopping",
"url": "http://192.168.253.2:8080/anzhuangbao/HappyShoppingApp.apk",
"version": 2
}