1、获取手机分辨率public static String getDisplayMetrix(Context context) { if (Constant.Screen.SCREEN_WIDTH == 0 || Constant.Screen.SCREEN_HEIGHT == 0) { if (context != null) { int width = 0; int height = 0; SharedPreferences DiaplayMetrixInfo = context.getSharedPreferences("display_metrix_info", 0); if (context instanceof Activity) { WindowManager windowManager = ((Activity) context).getWindowManager(); Display display = windowManager.getDefaultDisplay(); DisplayMetrics dm = new DisplayMetrics(); display.getMetrics(dm); width = dm.widthPixels; height = dm.heightPixels; Editor editor = DiaplayMetrixInfo.edit(); editor.putInt("width", width); editor.putInt("height", height); editor.commit(); } else { width = DiaplayMetrixInfo.getInt("width", 0); height = DiaplayMetrixInfo.getInt("height", 0); } Constant.Screen.SCREEN_WIDTH = width; Constant.Screen.SCREEN_HEIGHT = height; } } return Constant.Screen.SCREEN_WIDTH + "×" + Constant.Screen.SCREEN_HEIGHT;}2、关闭系统的软键盘public static void dismissSoftKeyboard(Activity activity) { View view = activity.getWindow().peekDecorView(); if (view != null) { InputMethodManager inputmanger = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE); inputmanger.hideSoftInputFromWindow(view.getWindowToken(), 0); }}3、dp—px相互转换public static int dp2px(Context context, float dpValue) { final float scale = context.getResources().getDisplayMetrics().density; return (int) (dpValue * scale + 0.5f);}public static int px2dp(Context context, float pxValue) { final float scale = context.getResources().getDisplayMetrics().density; return (int) (pxValue / scale + 0.5f);}4、获取设备唯一编码/** * 根据mac地址+deviceid * 获取设备唯一编码 * * @return */public static String getDeviceKey() { if ("".equals(DEVICEKEY)) { String macAddress = ""; WifiManager wifiMgr = (WifiManager) MainApplication.getIns().getSystemService(MainApplication.WIFI_SERVICE); WifiInfo info = (null == wifiMgr ? null : wifiMgr.getConnectionInfo()); if (null != info) { macAddress = info.getMacAddress(); } TelephonyManager telephonyManager = (TelephonyManager) MainApplication.getIns().getSystemService(MainApplication.TELEPHONY_SERVICE); String deviceId = telephonyManager.getDeviceId(); DEVICEKEY = MD5Util.toMD5("android" + Constant.APPKEY + Constant.APPPWD + macAddress + deviceId); } return DEVICEKEY;}5、获取手机及SIM卡相关信息public static Map getPhoneInfo(Context context) { Map map = new HashMap (); TelephonyManager tm = (TelephonyManager) context .getSystemService(Context.TELEPHONY_SERVICE); String imei = tm.getDeviceId(); String imsi = tm.getSubscriberId(); String phoneMode = android.os.Build.MODEL; String phoneSDk = android.os.Build.VERSION.RELEASE; map.put("imei", imei); map.put("imsi", imsi); map.put("phoneMode", phoneMode + "##" + phoneSDk); map.put("model", phoneMode); map.put("sdk", phoneSDk); return map;}6、安装apkpublic void install(Context context, String fileName) { if (TextUtils.isEmpty(fileName) || context == null) { return; } try { Intent intent = new Intent(Intent.ACTION_VIEW); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); intent.setAction(android.content.Intent.ACTION_VIEW); intent.setDataAndType(Uri.fromFile(new File(fileName)), "application/vnd.android.package-archive"); context.startActivity(intent); } catch (Exception e) { e.printStackTrace(); }}public void install(Context context, File file) { try { Intent intent = new Intent(Intent.ACTION_VIEW); intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive"); context.startActivity(intent); } catch (Exception e) { e.printStackTrace(); }}7、Strings.xml中“%s”的妙用在strings.xml中添加字符串 Hello,%s!在代码中textView.setText(String.format(getResources().getString(R.string.text),"Android"));输出结果：Hello,Android！