Android获取应用程序的信息

1.获取应用程序的版本号：

private String getAppVersionName() {
        String versionName = "";
        try {
            PackageManager pm = this.getPackageManager();
            PackageInfo pi = pm.getPackageInfo(this.getPackageName(), 0);
            versionName = pi.versionName;
            if (versionName == null || versionName.length() <= 0) {
                return "";
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return versionName;
    }

2.获取手机webview的useragent

private String getUserAgent() {
        WebView wv = new WebView(this);
        WebSettings settings = wv.getSettings();
        String user_agent = settings.getUserAgentString();
        wv.destroy();
        return user_agent;
    }

3.获取Android设备的唯一识别码

TelephonyManager telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
telephonyManager.getDeviceId()

4.获取手机ip

public String getLocalIpAddress() { 
  try { 
    for (Enumeration<NetworkInterface> en = NetworkInterface.getNetworkInterfaces(); en.hasMoreElements();) { 
      NetworkInterface intf = en.nextElement(); 
      for (Enumeration<InetAddress> enumIpAddr = intf.getInetAddresses(); enumIpAddr.hasMoreElements();) { 
        InetAddress inetAddress = enumIpAddr.nextElement(); 
        if (!inetAddress.isLoopbackAddress()) { 
        return inetAddress.getHostAddress().toString(); 
      } 
    } 
  } 
  } catch (SocketException ex) { 
      Log.e(LOG_TAG, ex.toString()); 
  } 
  return null; 
} 

要记得添加权限 <uses-permission android:name="android.permission.INTERNET"/>