1、判断是否联网

	public boolean isNetworkConnected() {
		ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
		NetworkInfo ni = cm.getActiveNetworkInfo();
		return ni != null && ni.isConnectedOrConnecting();
	}

	/**
	 * 获取当前网络类型
	 * @return 0：没有网络   1：WIFI网络   2：WAP网络    3：NET网络
	 */
	public int getNetworkType() {
		int netType = 0;
		ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
		NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
		if (networkInfo == null) {
			return netType;
		}		
		int nType = networkInfo.getType();
		if (nType == ConnectivityManager.TYPE_MOBILE) {
			String extraInfo = networkInfo.getExtraInfo();
			if(!StringUtils.isEmpty(extraInfo)){
				if (extraInfo.toLowerCase().equals("cmnet")) {
					netType = NETTYPE_CMNET;
				} else {
					netType = NETTYPE_CMWAP;
				}
			}
		} else if (nType == ConnectivityManager.TYPE_WIFI) {
			netType = NETTYPE_WIFI;
		}
		return netType;
	}
	

	/**
	 * 判断当前版本是否兼容目标版本的方法
	 * @param VersionCode
	 * @return
	 */
	public static boolean isMethodsCompat(int VersionCode) {
		int currentVersion = android.os.Build.VERSION.SDK_INT;
		return currentVersion >= VersionCode;
	}

/**
	 * 获取App安装包信息
	 * @return
	 */
	public PackageInfo getPackageInfo() {
		PackageInfo info = null;
		try { 
			info = getPackageManager().getPackageInfo(getPackageName(), 0);
		} catch (NameNotFoundException e) {    
			e.printStackTrace(System.err);
		} 
		if(info == null) info = new PackageInfo();
		return info;
	}

	public Properties get() {
		FileInputStream fis = null;
		Properties props = new Properties();
		try{
			//读取files目录下的config
			//fis = activity.openFileInput(APP_CONFIG);
			
			//读取app_config目录下的config
			File dirConf = mContext.getDir(APP_CONFIG, Context.MODE_PRIVATE);
			fis = new FileInputStream(dirConf.getPath() + File.separator + APP_CONFIG);
			
			props.load(fis);
		}catch(Exception e){
		}finally{
			try {
				fis.close();
			} catch (Exception e) {}
		}
		return props;
	}
	
	private void setProps(Properties p) {
		FileOutputStream fos = null;
		try{
			//把config建在files目录下
			//fos = activity.openFileOutput(APP_CONFIG, Context.MODE_PRIVATE);
			
			//把config建在(自定义)app_config的目录下
			File dirConf = mContext.getDir(APP_CONFIG, Context.MODE_PRIVATE);
			File conf = new File(dirConf, APP_CONFIG);
			fos = new FileOutputStream(conf);
			
			p.store(fos, null);
			fos.flush();
		}catch(Exception e){	
			e.printStackTrace();
		}finally{
			try {
				fos.close();
			} catch (Exception e) {}
		}
	}

	String versionName = getPackageManager().getPackageInfo(
					getPackageName(), 0).versionName;
			int versionCode = getPackageManager().getPackageInfo(
					getPackageName(), 0).versionCode;
			String VERSION = android.os.Build.VERSION.RELEASE;// 系统版本
			String MODEL = android.os.Build.MODEL;// 手机型号
			textView.setText("versionName" + versionName + "\n" + "versionCode"
					+ versionCode + "\n" + "系统版本" + VERSION + "\n" + "手机型号"
					+ MODEL);

开源中国客户端笔记记录