CheckUpdateTask.java

package com.mcxiaoke.minicat.task;

import android.app.ProgressDialog;
import android.content.Context;
import android.os.AsyncTask;
import com.mcxiaoke.minicat.AppContext;
import com.mcxiaoke.minicat.service.DownloadService;
import com.mcxiaoke.minicat.service.VersionInfo;
import com.mcxiaoke.minicat.util.Utils;


/**
 * @author mcxiaoke
 * @version 1.1 2012.04.24
 */
public class CheckUpdateTask extends AsyncTask<Void, Void, VersionInfo> {
    private final ProgressDialog pd;
    private Context c;

    public CheckUpdateTask(Context context) {
        this.c = context;
        pd = new ProgressDialog(c);
    }

    @Override
    protected VersionInfo doInBackground(Void... params) {
        return DownloadService.fetchVersionInfo();
    }

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        pd.setTitle("检查更新");
        pd.setMessage("正在检查新版本...");
        pd.setIndeterminate(true);
        pd.show();
    }

    @Override
    protected void onPostExecute(VersionInfo info) {
        pd.dismiss();
        if (info != null && info.versionCode > AppContext.versionCode) {
            DownloadService.showUpdateConfirmDialog(c, info);
        } else {
            Utils.notify(c, "你使用的已经是最新版");
        }
    }
}