Android中获取设备的各种信息总结
发布时间：2016-09-07 09:23:11
相信各位Android的开发者们都知道，现在几乎所有的app都需要获得设备信息，那么下面这篇文章就来详细说说获取设备信息的方法。
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。
