Android中获取设备的各种信息总结

一、屏幕分辨率

display display = getwindowmanager().getdefaultdisplay();
point size = new point();
display.getsize(size);
int width = size.x;
int height = size.y;

或者：

displaymetrics metrics = new displaymetrics();
getwindowmanager().getdefaultdisplay().getmetrics(metrics);
int width = metrics.widthpixels;
int height = metrics.heightpixels

上面的代码是要在能获取到activity的情况下使用的，如果无法获取到activity，则可以使用一下的代码：

windowmanager wm = (windowmanager)context.getsystemservice(context.window_service);
display display = wm.getdefaultdisplay();
point point = new point();
display.getsize(point);
int width = point.x;
int height = point.y;

二、屏幕尺寸

displaymetrics dm = new displaymetrics();
getwindowmanager().getdefaultdisplay().getmetrics(dm);
int width=dm.widthpixels;
int height=dm.heightpixels;
int dens=dm.densitydpi;
double wi=(double)width/(double)dens;
double hi=(double)height/(double)dens;
double x = math.pow(wi,2);
double y = math.pow(hi,2);
double screeninches = math.sqrt(x+y);

同样，上面的代码需要在能获取到activity。

三、获取app名称

public static string getappname(context context) {
  string appname = "";
  try {
    packagemanager packagemanager = context.getpackagemanager();
    applicationinfo applicationinfo = packagemanager.getapplicationinfo(context.getpackagename(), 0);
    appname = (string) packagemanager.getapplicationlabel(applicationinfo);
  } catch (packagemanager.namenotfoundexception e) {
    e.printstacktrace();
  }
  return appname;
}

四、获取设备厂商和设备名称信息

// 设备厂商
string brand = build.brand;
// 设备名称
string model = build.model;

获取deviceid，sim和imsi

telephonymanager tm = (telephonymanager) context.getsystemservice(context.telephony_service);
string deviceid = tm.getdeviceid();
string sim = tm.getsimserialnumber();
string imsi = (telephonymanager) getsystemservice(context.telephony_service).getsubscriberid()；

注意需要在androidmanifest中添加权限

<uses-permission android:name="android.permission.read_phone_state"/>

五、获取网络状态

public static string getapntype(context context) {
  //结果返回值
  string nettype = "nono_connect";
  //获取手机所有连接管理对象
  connectivitymanager manager = (connectivitymanager) context.getsystemservice(context.connectivity_service);
  //获取networkinfo对象
  networkinfo networkinfo = manager.getactivenetworkinfo();
  //networkinfo对象为空 则代表没有网络
  if (networkinfo == null) {
    return nettype;
  }
  //否则 networkinfo对象不为空 则获取该networkinfo的类型
  int ntype = networkinfo.gettype();
  if (ntype == connectivitymanager.type_wifi) {
    //wifi
    nettype = "wifi";
  } else if (ntype == connectivitymanager.type_mobile) {
    int nsubtype = networkinfo.getsubtype();
    telephonymanager telephonymanager = (telephonymanager) context.getsystemservice(context.telephony_service);
    //4g
    if (nsubtype == telephonymanager.network_type_lte
        && !telephonymanager.isnetworkroaming()) {
      nettype = "4g";
    } else if (nsubtype == telephonymanager.network_type_umts || nsubtype == telephonymanager.network_type_hsdpa || nsubtype == telephonymanager.network_type_evdo_0 && !telephonymanager.isnetworkroaming()) {
      nettype = "3g";
    //2g 移动和联通的2g为gprs或egde，电信的2g为cdma
    } else if (nsubtype == telephonymanager.network_type_gprs || nsubtype == telephonymanager.network_type_edge || nsubtype == telephonymanager.network_type_cdma && !telephonymanager.isnetworkroaming()) {
      nettype = "2g";
    } else {
      nettype = "2g";
    }
  }
  return nettype;
}

六、判断设备是否root

网上有很多判断方法，但有些会在界面上弹窗提示获取权限，下面介绍一种无需弹窗判断设备是否root的方法：

/** 判断手机是否root，不弹出root请求框<br/> */
  public static boolean isroot() {
    string binpath = "/system/bin/su";
    string xbinpath = "/system/xbin/su";
    if (new file(binpath).exists() && isexecutable(binpath))
      return true;
    if (new file(xbinpath).exists() && isexecutable(xbinpath))
      return true;
    return false;
  }

  private static boolean isexecutable(string filepath) {
    process p = null;
    try {
      p = runtime.getruntime().exec("ls -l " + filepath);
      // 获取返回内容
      bufferedreader in = new bufferedreader(new inputstreamreader(
          p.getinputstream()));
      string str = in.readline();
      if (str != null && str.length() >= 4) {
        char flag = str.charat(3);
        if (flag == 's' || flag == 'x')
          return true;
      }
    } catch (ioexception e) {
      e.printstacktrace();
    } finally {
      if (p != null) {
        p.destroy();
      }
    }
    return false;
  }

七、总结

以上就是关于获取android中设备各种信息的全部内容，这篇文章对大家开发android app具有一定参考借鉴价值，希望对大家能有所帮助，如果有疑问大家可以留言交流。