android中有哪些utils的作用,AndroidUtils
多年開發Android積攢下來好多常用的工具方法，保存在隨筆中，持續更新。
TimeUtil
/**
* 獲取距當前時刻的時間戳
*
* @param createTime
* @return
*/
public static String getTimestamp(long createTime) {
long currrentMillis = System.currentTimeMillis();
// if (createTime < 0 || currrentMillis < createTime) {
// return null;
// }
StringBuffer sb =new StringBuffer();
Date date =new Date(createTime);
Calendar now = Calendar.getInstance();
SimpleDateFormat sdf_hms =new SimpleDateFormat("HH:mm");
SimpleDateFormat sdf_full =new SimpleDateFormat("yyyy-MM-dd HH:mm");
long standardMillis =1000 * (now.get(Calendar.HOUR_OF_DAY) *3600 + now.get(Calendar.MINUTE) *60 + now.get(Calendar.SECOND));
long diffMillis = currrentMillis - createTime;
if (diffMillis <60 *1000) {
sb.append("剛剛");
}else if (diffMillis <3600 *1000) {
sb.append(diffMillis /60000 +"分鐘前");
}else if (diffMillis < standardMillis) {
sb.append("今天 " + sdf_hms.format(date));
}else if (diffMillis < standardMillis +MILLISECOND_OF_DAY) {
sb.append("昨天 " + sdf_hms.format(date));
}else {
sb.append(sdf_full.format(date));
}
return sb.toString();
}
//判斷選擇的日期是否是今天
public static boolean isToday(long time) {
return isThisTime(time,"yyyy-MM-dd");
}
//判斷選擇的日期是否是本月
public static boolean isThisMonth(long time) {
return isThisTime(time,"yyyy-MM");
}
private static boolean isThisTime(long time, String pattern) {
Date date =new Date(time);
SimpleDateFormat sdf =new SimpleDateFormat(pattern);
String param = sdf.format(date);//參數時間
String now = sdf.format(new Date());//當前時間
if (param.equals(now)) {
return true;
}
return false;
}
//判斷選擇的日期是否是本周
public static boolean isThisWeek(long time) {
Calendar calendar = Calendar.getInstance();
int currentWeek = calendar.get(Calendar.WEEK_OF_YEAR);
calendar.setTime(new Date(time));
int paramWeek = calendar.get(Calendar.WEEK_OF_YEAR);
if (paramWeek == currentWeek) {
return true;
}
return false;
}
/**
* 將long時間格式字符串轉換為字符串 yyyy-MM-dd HH:mm MM月dd日 yyyy-MM-dd
*
* @return
*/
public static String timeLong2String(long data) {
Date date =new Date(data);
SimpleDateFormat formatter =new SimpleDateFormat("yyyy-MM-dd HH:mm");
// SimpleDateFormat formatter = new SimpleDateFormat("MM月dd日");
// SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
return formatter.format(date);
}
ScreenUtil
public static int px2sp(Context context,float pxValue) {
final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
return (int) (pxValue / fontScale +0.5f);
}
public static int dp2px(Context context,int dp) {
DisplayMetrics displayMetrics = context.getResources().getDisplayMetrics();
return (int) ((dp * displayMetrics.density) +0.5);
}
public static int px2dp(Context context,float pxValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (pxValue / scale +0.5f);
}
/**
* 獲取屏幕寬度
*/
public static int getScreenWidth(Context context) {
DisplayMetrics dm = context.getResources().getDisplayMetrics();
return dm.widthPixels;
}
/**
* 獲取屏幕高度
*/
public static int getScreenHeight(Context context) {
DisplayMetrics dm = context.getResources().getDisplayMetrics();
return dm.heightPixels;
}
/**
* 獲取狀態欄高度
*/
public static int getStatusBarHeight(Context context) {
// 一般是25dp
int height =dp2px(context,20);
//獲取status_bar_height資源的ID
int resourceId = context.getResources().getIdentifier("status_bar_height","dimen","android");
if (resourceId >0) {
height = context.getResources().getDimensionPixelSize(resourceId);
LogUtil.i("real statusBar height:" + height);
}
return height;
}
/**
* 虛擬操作攔(home等)是否顯示
*/
public static boolean isNavigationBarShow(Activity activity) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
Display display = activity.getWindowManager().getDefaultDisplay();
Point size =new Point();
Point realSize =new Point();
display.getSize(size);
display.getRealSize(realSize);
return realSize.y != size.y;
}else {
boolean menu = ViewConfiguration.get(activity).hasPermanentMenuKey();
boolean back = KeyCharacterMap.deviceHasKey(KeyEvent.KEYCODE_BACK);
if (menu || back) {
return false;
}else {
return true;
}
}
}
/**
* 獲取虛擬操作攔(home等)高度
*/
public static int getNavigationBarHeight(Activity activity) {
if (!isNavigationBarShow(activity))
return 0;
int height =0;
Resources resources = activity.getResources();
//獲取NavigationBar的高度
int resourceId = resources.getIdentifier("navigation_bar_height","dimen","android");
if (resourceId >0)
height = resources.getDimensionPixelSize(resourceId);
return height;
}
NetWorkUtil
/**
* 沒有網絡
*/
public static final int NETWORKTYPE_INVALID =0;
/**
* wap網絡
*/
public static final int NETWORKTYPE_WAP =1;
/**
* 2G網絡
*/
public static final int NETWORKTYPE_2G =2;
/**
* 3G和3G以上網絡，或統稱為快速網絡
*/
public static final int NETWORKTYPE_3G =3;
/**
* wifi網絡
*/
public static final int NETWORKTYPE_WIFI =4;
private static boolean isFastMobileNetwork(Context context) {
TelephonyManager telephonyManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
switch (telephonyManager.getNetworkType()) {
case TelephonyManager.NETWORK_TYPE_1xRTT:
return false;// ~ 50-100 kbps
case TelephonyManager.NETWORK_TYPE_CDMA:
return false;// ~ 14-64 kbps
case TelephonyManager.NETWORK_TYPE_EDGE:
return false;// ~ 50-100 kbps
case TelephonyManager.NETWORK_TYPE_EVDO_0:
return true;// ~ 400-1000 kbps
case TelephonyManager.NETWORK_TYPE_EVDO_A:
return true;// ~ 600-1400 kbps
case TelephonyManager.NETWORK_TYPE_GPRS:
return false;// ~ 100 kbps
case TelephonyManager.NETWORK_TYPE_HSDPA:
return true;// ~ 2-14 Mbps
case TelephonyManager.NETWORK_TYPE_HSPA:
return true;// ~ 700-1700 kbps
case TelephonyManager.NETWORK_TYPE_HSUPA:
return true;// ~ 1-23 Mbps
case TelephonyManager.NETWORK_TYPE_UMTS:
return true;// ~ 400-7000 kbps
case TelephonyManager.NETWORK_TYPE_EHRPD:
return true;// ~ 1-2 Mbps
case TelephonyManager.NETWORK_TYPE_EVDO_B:
return true;// ~ 5 Mbps
case TelephonyManager.NETWORK_TYPE_HSPAP:
return true;// ~ 10-20 Mbps
case TelephonyManager.NETWORK_TYPE_IDEN:
return false;// ~25 kbps
case TelephonyManager.NETWORK_TYPE_LTE:
return true;// ~ 10+ Mbps
case TelephonyManager.NETWORK_TYPE_UNKNOWN:
return false;
default:
return false;
}
}
/**
* 獲取網絡狀態，wifi,wap,2g,3g.
*
* @param context 上下文
* @return int 網絡狀態
*/
public static int getNetWorkType(Context context) {
ConnectivityManager manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo networkInfo = manager.getActiveNetworkInfo();
if (networkInfo !=null && networkInfo.isConnected()) {
String type = networkInfo.getTypeName();
if (type.equalsIgnoreCase("WIFI")) {
return NETWORKTYPE_WIFI;
}else if (type.equalsIgnoreCase("MOBILE")) {
String proxyHost = android.net.Proxy.getDefaultHost();
return TextUtils.isEmpty(proxyHost)
? (isFastMobileNetwork(context) ?NETWORKTYPE_3G :NETWORKTYPE_2G)
:NETWORKTYPE_WAP;
}
}else {
return NETWORKTYPE_INVALID;
}
return NETWORKTYPE_INVALID;
}
public static boolean isNetWorkConnect(Context context) {
return getNetWorkType(context) !=0;
}
DeviceUtil
/**
* 獲取deviceid
*
* @return
*/
public static String getDeviceId() {
String deviceId =getDeviceIdLocally();
if (TextUtils.isEmpty(deviceId)) {
try {
AdvertisingIdClient.Info idInfo = AdvertisingIdClient.getAdvertisingIdInfo(CCApplication.getInstance());
if (idInfo ==null) {
String uuid =getUUId();
storeDeviceId(uuid);
return uuid;
}else {
String advertId = idInfo.getId();
if (TextUtils.isEmpty(advertId)) {
return getUUId();
}else {
storeDeviceId(advertId);
SharedPrefUtils.getInstance().putString(AppConstant.SharedPreferenceKey.KEYCHAIN_ID, MD5Util.md5Encode(advertId));
return advertId;
}
}
}catch (Exception e) {
return getUUId();
}
}else {
return deviceId;
}
}
public static String getUUId() {
String uuId = UUID.randomUUID().toString();
SharedPrefUtils.getInstance().putString(AppConstant.SharedPreferenceKey.DEVICE_ID, uuId);
SharedPrefUtils.getInstance().putString(AppConstant.SharedPreferenceKey.KEYCHAIN_ID, MD5Util.md5Encode(uuId));
return uuId;
}
private static String getDeviceIdLocally() {
final String fileName ="HMSN.ini";
File file =null;
if (isSDCardAvailable()) {
file =new File(Environment.getExternalStorageDirectory(), fileName);
if (!file.exists()) {
file =null;
}
}
boolean internally =false;
if (file ==null) {
file =new File(CCApplication.getInstance().getFilesDir(), fileName);
internally =true;
}
if (file ==null || !file.exists()) {
String deviceId = SharedPrefUtils.getInstance().getString(AppConstant.SharedPreferenceKey.DEVICE_ID);
if (!TextUtils.isEmpty(deviceId)) {
storeDeviceId(deviceId);
return deviceId;
}
return null;
}
InputStream ins =null;
try {
ins =new FileInputStream(file);
Properties properties =new Properties();
properties.load(ins);
String deviceId = properties.getProperty(AppConstant.SharedPreferenceKey.DEVICE_ID);
if (!TextUtils.isEmpty(deviceId) && !internally &&isSDCardAvailable()) {
storeDeviceId(deviceId);
}
return deviceId;
}catch (Exception e) {
e.printStackTrace();
return null;
}finally {
if (ins !=null) {
try {
ins.close();
}catch (IOException e) {
e.printStackTrace();
}
}
}
}
private static void storeDeviceId(String deviceId) {
SharedPrefUtils.getInstance().putString(AppConstant.SharedPreferenceKey.DEVICE_ID, deviceId);
File file =new File(isSDCardAvailable() ? Environment.getExternalStorageDirectory() : CCApplication.getInstance().getFilesDir(),"HMSN.ini");
OutputStream outs =null;
try {
outs =new FileOutputStream(file);
Properties properties =new Properties();
properties.setProperty(AppConstant.SharedPreferenceKey.DEVICE_ID, deviceId);
properties.store(outs,null);
}catch (Exception e) {
e.printStackTrace();
}finally {
if (outs !=null) {
try {
outs.close();
}catch (IOException e) {
e.printStackTrace();
}
}
}
}
public static boolean isSDCardAvailable() {
return (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState()));
}
/**
* 獲取本地語言
* @return
*/
public static String getDeviceLanguage() {
return Locale.getDefault().getLanguage();
}
public static String getSimCode() {
TelephonyManager manager = (TelephonyManager) CCApplication.getInstance().getSystemService(Context.TELEPHONY_SERVICE);
return manager.getSimCountryIso();
}
總結
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