转载请注明出处： http://blog.csdn.net/smartbetter/article/details/52709446
本篇用于分享Android开发辅助工具类，用于快速开发，以便减少做重复的工作，提高开发效率。项目代码长期更新于Github：https://github.com/smartbetter/Android-UtilsLibrary
1.AppUtils（App相关辅助类）
public class AppUtils {
private AppUtils() {
throw new UnsupportedOperationException("cannot be instantiated");
}
/**
* 获取应用程序名称
*/
public static String getAppName(Context context) {
try {
PackageManager packageManager = context.getPackageManager();
PackageInfo packageInfo = packageManager.getPackageInfo(context.getPackageName(), 0);
int labelRes = packageInfo.applicationInfo.labelRes;
return context.getResources().getString(labelRes);
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}
return null;
}
/**
* 获取应用程序版本名称信息
*/
public static String getVersionName(Context context) {
try {
PackageManager packageManager = context.getPackageManager();
PackageInfo packageInfo = packageManager.getPackageInfo(context.getPackageName(), 0);
return packageInfo.versionName;
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}
return null;
}
}
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2.CameraUtils（摄像头相关辅助类）
public class CameraUtils {
private CameraUtils() {
throw new UnsupportedOperationException("cannot be instantiated");
}
/**
* 判断摄像头是否可用
*/
public static boolean isCameraCanUse() {
boolean canUse = true;
Camera mCamera = null;
try {
mCamera = Camera.open();
Camera.Parameters mParameters = mCamera.getParameters();
mCamera.setParameters(mParameters);
} catch (Exception e) {
canUse = false;
}
if (mCamera != null) {
mCamera.release();
}
return canUse;
}
}
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3.DensityUtils(android dp和px之间转换)
public class DensityUtils {
private DensityUtils() {
throw new UnsupportedOperationException("cannot be instantiated");
}
/**
* 根据手机的分辨率从 dip 的单位 转成为 px(像素)
*/
public static int qip2px(Context context, float dpValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dpValue * scale + 0.5f);
}
/**
* 根据手机的分辨率从 px(像素) 的单位 转成为 dp
*/
public static int px2dip(Context context, float pxValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (pxValue / scale + 0.5f);
}
}
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4.FileUtils（文件的基本操作）
主要封装了一些文件操作的基本方法，包括创建、删除、获取文件大小等。
public class FileUtils {
private FileUtils() {
throw new UnsupportedOperationException("cannot be instantiated");
}
/**
* 检查是否存在SD卡
*/
public static boolean hasSdcard() {
String state = Environment.getExternalStorageState();
if (state.equals(Environment.MEDIA_MOUNTED)) {
return true;
} else {
return false;
}
}
/**
* 创建目录
*
* @param context
* @param dirName 文件夹名称
* @return
*/
public static File createFileDir(Context context, String dirName) {
String filePath;
if (hasSdcard()) {
filePath = Environment.getExternalStorageDirectory() + File.separator + dirName;
} else {
filePath = context.getCacheDir().getPath() + File.separator + dirName;
}
File destDir = new File(filePath);
if (!destDir.exists()) {
boolean isCreate = destDir.mkdirs();
Log.i("FileUtils", filePath + " has created. " + isCreate);
}
return destDir;
}
/**
* 删除文件（若为目录，则递归删除子目录和文件）
*
* @param file
* @param delThisPath true代表删除参数指定file，false代表保留参数指定file
*/
public static void delFile(File file, boolean delThisPath) {
if (!file.exists()) {
return;
}
if (file.isDirectory()) {
File[] subFiles = file.listFiles();
if (subFiles != null) {
int num = subFiles.length;
for (int i = 0; i < num; i++) {
delFile(subFiles[i], true);
}
}
}
if (delThisPath) {
file.delete();
}
}
/**
* 获取文件大小，单位为byte（若为目录，则包括所有子目录和文件）
*
* @param file
* @return
*/
public static long getFileSize(File file) {
long size = 0;
if (file.exists()) {
if (file.isDirectory()) {
File[] subFiles = file.listFiles();
if (subFiles != null) {
int num = subFiles.length;
for (int i = 0; i < num; i++) {
size += getFileSize(subFiles[i]);
}
}
} else {
size += file.length();
}
}
return size;
}
/**
* 保存Bitmap到指定目录
*
* @param dir 目录
* @param fileName 文件名
* @param bitmap
* @throws IOException
*/
public static void saveBitmap(File dir, String fileName, Bitmap bitmap) {
if (bitmap == null) {
return;
}
File file = new File(dir, fileName);
try {
file.createNewFile();
FileOutputStream fos = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.flush();
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 判断某目录下文件是否存在
*
* @param dir 目录
* @param fileName 文件名
* @return
*/
public static boolean isFileExists(File dir, String fileName) {
return new File(dir, fileName).exists();
}
}
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5.HttpUtils（Http相关辅助类）
public class HttpUtils {
private HttpUtils() {
throw new UnsupportedOperationException("cannot be instantiated");
}
private static final int TIMEOUT_IN_MILLIONS = 5000;
public interface CallBack {
void onRequestComplete(String result);
}
/**
* 异步的Get请求
*
* @param urlStr
* @param callBack
*/
public static void doGetAsyn(final String urlStr, final CallBack callBack) {
new Thread() {
public void run() {
try {
String result = doGet(urlStr);
if (callBack != null) {
callBack.onRequestComplete(result);
}
} catch (Exception e) {
e.printStackTrace();
}
}
;
}.start();
}
/**
* 异步的Post请求
*
* @param urlStr
* @param params
* @param callBack
* @throws Exception
*/
public static void doPostAsyn(final String urlStr, final String params,
final CallBack callBack) throws Exception {
new Thread() {
public void run() {
try {
String result = doPost(urlStr, params);
if (callBack != null) {
callBack.onRequestComplete(result);
}
} catch (Exception e) {
e.printStackTrace();
}
}
;
}.start();
}
/**
* Get请求，获得返回数据
*
* @param urlStr
* @return
* @throws Exception
*/
public static String doGet(String urlStr) {
URL url = null;
HttpURLConnection conn = null;
InputStream is = null;
ByteArrayOutputStream baos = null;
try {
url = new URL(urlStr);
conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(TIMEOUT_IN_MILLIONS);
conn.setConnectTimeout(TIMEOUT_IN_MILLIONS);
conn.setRequestMethod("GET");
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
if (conn.getResponseCode() == 200) {
is = conn.getInputStream();
baos = new ByteArrayOutputStream();
int len = -1;
byte[] buf = new byte[128];
while ((len = is.read(buf)) != -1) {
baos.write(buf, 0, len);
}
baos.flush();
return baos.toString();
} else {
throw new RuntimeException(" responseCode is not 200 ... ");
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (is != null)
is.close();
} catch (IOException e) {
}
try {
if (baos != null)
baos.close();
} catch (IOException e) {
}
conn.disconnect();
}
return null;
}
/**
* 向指定 URL 发送POST方法的请求
*
* @param url 发送请求的 URL
* @param param 请求参数，形式:name1=value1&name2=value2
* @return 所代表远程资源的响应结果
* @throws Exception
*/
public static String doPost(String url, String param) {
PrintWriter out = null;
BufferedReader in = null;
String result = "";
try {
URL realUrl = new URL(url);
HttpURLConnection conn = (HttpURLConnection) realUrl
.openConnection();
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");
conn.setRequestProperty("charset", "utf-8");
conn.setUseCaches(false);
conn.setDoOutput(true);
conn.setDoInput(true);
conn.setReadTimeout(TIMEOUT_IN_MILLIONS);
conn.setConnectTimeout(TIMEOUT_IN_MILLIONS);
if (param != null && !param.trim().equals("")) {
out = new PrintWriter(conn.getOutputStream());
out.print(param);
out.flush();
}
in = new BufferedReader(
new InputStreamReader(conn.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
e.printStackTrace();
}
finally {
try {
if (out != null) {
out.close();
}
if (in != null) {
in.close();
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
return result;
}
}
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6.KeyBoardUtils（软键盘相关辅助类）
public class KeyBoardUtils {
private KeyBoardUtils() {
throw new UnsupportedOperationException("cannot be instantiated");
}
/**
* 切换软键盘的状态
* 如当前为收起变为弹出,若当前为弹出变为收起
*/
public static void toggleKeybord(EditText edittext) {
InputMethodManager inputMethodManager = (InputMethodManager)
edittext.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
inputMethodManager.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);
}
/**
* 强制隐藏输入法键盘
*/
public static void hideKeybord(EditText edittext) {
InputMethodManager inputMethodManager = (InputMethodManager)
edittext.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
if (inputMethodManager.isActive()) {
inputMethodManager.hideSoftInputFromWindow(edittext.getWindowToken(), 0);
}
}
/**
* 强制显示输入法键盘
*/
public static void showKeybord(EditText edittext) {
InputMethodManager inputMethodManager = (InputMethodManager)
edittext.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
inputMethodManager.showSoftInput(edittext, InputMethodManager.SHOW_FORCED);
}
/**
* 输入法是否显示
*/
public static boolean isKeybord(EditText edittext) {
boolean bool = false;
InputMethodManager inputMethodManager = (InputMethodManager)
edittext.getContext().getSystemService(Context.INPUT_METHOD_SERVICE);
if (inputMethodManager.isActive()) {
bool = true;
}
return bool;
}
}
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7.LogUtils
public class LogUtils {
private LogUtils() {
throw new UnsupportedOperationException("cannot be instantiated");
}
private static boolean isDebug = false;
public static void i(String tag, String msg) {
if (isDebug) {
Log.i(tag, msg);
}
}
public static void i(Object object, String msg) {
if (isDebug) {
Log.i(object.getClass().getSimpleName(), msg);
}
}
public static void e(String tag, String msg) {
if (isDebug) {
Log.e(tag, msg);
}
}
public static void e(Object object, String msg) {
if (isDebug) {
Log.e(object.getClass().getSimpleName(), msg);
}
}
}
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8.NetUtils（网络相关）
public class NetUtils {
private NetUtils() {
throw new UnsupportedOperationException("cannot be instantiated");
}
/**
* 判断网络是否连接
*/
public static boolean isConnected(Context context) {
ConnectivityManager connectivity = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
if (null != connectivity) {
NetworkInfo info = connectivity.getActiveNetworkInfo();
if (null != info && info.isConnected()) {
if (info.getState() == NetworkInfo.State.CONNECTED) {
return true;
}
}
}
return false;
}
/**
* 是否有网络，需要加上访问网络状态的权限
*/
public static boolean hasNetwork(Context context) {
ConnectivityManager con = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo workinfo = con.getActiveNetworkInfo();
if (workinfo == null || !workinfo.isAvailable()) {
return false;
}
return true;
}
/**
* 判断是否是WiFi网络
*/
public static boolean isWifiNet(Context context) {
ConnectivityManager con = (ConnectivityManager) context
.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo workinfo = con.getActiveNetworkInfo();
return workinfo != null
&& workinfo.getType() == ConnectivityManager.TYPE_WIFI;
}
/**
* 打开网络设置界面
*/
public static void openSetting(Activity activity) {
activity.startActivity(new Intent(Settings.ACTION_WIRELESS_SETTINGS));
}
}
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9.ScreenUtils（屏幕相关）
public class ScreenUtils {
private ScreenUtils() {
throw new UnsupportedOperationException("cannot be instantiated");
}
/**
* 获得屏幕高度
*/
public static int getScreenWidth(Context context) {
WindowManager wm = (WindowManager) context
.getSystemService(Context.WINDOW_SERVICE);
DisplayMetrics outMetrics = new DisplayMetrics();
wm.getDefaultDisplay().getMetrics(outMetrics);
return outMetrics.widthPixels;
}
/**
* 获得屏幕宽度
*/
public static int getScreenHeight(Context context) {
WindowManager wm = (WindowManager) context
.getSystemService(Context.WINDOW_SERVICE);
DisplayMetrics outMetrics = new DisplayMetrics();
wm.getDefaultDisplay().getMetrics(outMetrics);
return outMetrics.heightPixels;
}
/**
* 获得状态栏的高度
*/
public static int getStatusHeight(Context context) {
int statusHeight = -1;
try {
Class<?> clazz = Class.forName("com.android.internal.R$dimen");
Object object = clazz.newInstance();
int height = Integer.parseInt(clazz.getField("status_bar_height")
.get(object).toString());
statusHeight = context.getResources().getDimensionPixelSize(height);
} catch (Exception e) {
e.printStackTrace();
}
return statusHeight;
}
/**
* 获取当前屏幕截图，包含状态栏
*/
public static Bitmap snapShotWithStatusBar(Activity activity) {
View view = activity.getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap bmp = view.getDrawingCache();
int width = getScreenWidth(activity);
int height = getScreenHeight(activity);
Bitmap bp = null;
bp = Bitmap.createBitmap(bmp, 0, 0, width, height);
view.destroyDrawingCache();
return bp;
}
/**
* 获取当前屏幕截图，不包含状态栏
*/
public static Bitmap snapShotWithoutStatusBar(Activity activity) {
View view = activity.getWindow().getDecorView();
view.setDrawingCacheEnabled(true);
view.buildDrawingCache();
Bitmap bmp = view.getDrawingCache();
Rect frame = new Rect();
activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
int statusBarHeight = frame.top;
int width = getScreenWidth(activity);
int height = getScreenHeight(activity);
Bitmap bp = null;
bp = Bitmap.createBitmap(bmp, 0, statusBarHeight, width, height
- statusBarHeight);
view.destroyDrawingCache();
return bp;
}
}
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10.SDCardUtils（SD卡相关）
public class SDCardUtils {
private SDCardUtils() {
throw new UnsupportedOperationException("cannot be instantiated");
}
/**
* 判断SDCard是否可用
*/
public static boolean isSDCardEnable() {
return Environment.getExternalStorageState().equals(
Environment.MEDIA_MOUNTED);
}
/**
* 获取SD卡路径
*/
public static String getSDCardPath() {
return Environment.getExternalStorageDirectory().getAbsolutePath()
+ File.separator;
}
/**
* 获取SD卡的剩余容量(byte)
*/
public static long getSDCardAllSize() {
if (isSDCardEnable()) {
StatFs stat = new StatFs(getSDCardPath());
long availableBlocks = (long) stat.getAvailableBlocks() - 4;
long freeBlocks = stat.getAvailableBlocks();
return freeBlocks * availableBlocks;
}
return 0;
}
/**
* 获取指定路径所在空间的剩余可用容量字节数(byte)
* @param filePath
* @return 容量字节 SDCard可用空间，内部存储可用空间
*/
public static long getFreeBytes(String filePath) {
if (filePath.startsWith(getSDCardPath())) {
filePath = getSDCardPath();
} else {
filePath = Environment.getDataDirectory().getAbsolutePath();
}
StatFs stat = new StatFs(filePath);
long availableBlocks = (long) stat.getAvailableBlocks() - 4;
return stat.getBlockSize() * availableBlocks;
}
/**
* 获取系统存储路径
*/
public static String getRootDirectoryPath() {
return Environment.getRootDirectory().getAbsolutePath();
}
}
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11.SPUtils
public class SPUtils {
private SPUtils() {
throw new UnsupportedOperationException("cannot be instantiated");
}
/**
* 保存文件名
*/
public static final String FILE_NAME = "config";
/**
* 保存数据的方法，根据类型调用不同的保存方法
*/
public static void put(Context context, String key, Object object) {
SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sp.edit();
if (object instanceof String) {
editor.putString(key, (String) object);
} else if (object instanceof Integer) {
editor.putInt(key, (Integer) object);
} else if (object instanceof Boolean) {
editor.putBoolean(key, (Boolean) object);
} else if (object instanceof Float) {
editor.putFloat(key, (Float) object);
} else if (object instanceof Long) {
editor.putLong(key, (Long) object);
} else {
editor.putString(key, object.toString());
}
SharedPreferencesCompat.apply(editor);
}
/**
* 获取数据的方法，根据默认值得到数据的类型，然后调用对应方法获取值
*/
public static Object get(Context context, String key, Object defaultObject) {
SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
Context.MODE_PRIVATE);
if (defaultObject instanceof String) {
return sp.getString(key, (String) defaultObject);
} else if (defaultObject instanceof Integer) {
return sp.getInt(key, (Integer) defaultObject);
} else if (defaultObject instanceof Boolean) {
return sp.getBoolean(key, (Boolean) defaultObject);
} else if (defaultObject instanceof Float) {
return sp.getFloat(key, (Float) defaultObject);
} else if (defaultObject instanceof Long) {
return sp.getLong(key, (Long) defaultObject);
}
return null;
}
/**
* 移除某个key对应的值
*/
public static void remove(Context context, String key) {
SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sp.edit();
editor.remove(key);
SharedPreferencesCompat.apply(editor);
}
/**
* 清除所有数据
*/
public static void clear(Context context) {
SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
Context.MODE_PRIVATE);
SharedPreferences.Editor editor = sp.edit();
editor.clear();
SharedPreferencesCompat.apply(editor);
}
/**
* 查询某个key是否已经存在
*/
public static boolean contains(Context context, String key) {
SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
Context.MODE_PRIVATE);
return sp.contains(key);
}
/**
* 返回所有的键值对
*/
public static Map<String, ?> getAll(Context context) {
SharedPreferences sp = context.getSharedPreferences(FILE_NAME,
Context.MODE_PRIVATE);
return sp.getAll();
}
/**
* 创建一个解决SharedPreferencesCompat.apply方法的一个兼容类（适配）
*/
private static class SharedPreferencesCompat {
private static final Method sApplyMethod = findApplyMethod();
/**
* 反射查找apply的方法
*/
@SuppressWarnings({"unchecked", "rawtypes"})
private static Method findApplyMethod() {
try {
Class clz = SharedPreferences.Editor.class;
return clz.getMethod("apply");
} catch (NoSuchMethodException e) {
}
return null;
}
/**
* 如果找到则使用apply执行，否则使用commit
*/
public static void apply(SharedPreferences.Editor editor) {
try {
if (sApplyMethod != null) {
sApplyMethod.invoke(editor);
return;
}
} catch (IllegalArgumentException e) {
} catch (IllegalAccessException e) {
} catch (InvocationTargetException e) {
}
editor.commit();
}
}
}
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12.ToastUtils
public class ToastUtils {
private ToastUtils() {
throw new UnsupportedOperationException("cannot be instantiated");
}
/**
* 短时间显示Toast
*/
public static void showShort(Context context, CharSequence message) {
Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
}
/**
* 长时间显示Toast
*/
public static void showLong(Context context, CharSequence message) {
Toast.makeText(context, message, Toast.LENGTH_LONG).show();
}
}
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13.ViewUtils
public class ViewUtils {
private ViewUtils() {
throw new UnsupportedOperationException("cannot be instantiated");
}
/**
* 把自身从父View中移除
*/
public static void removeSelfFromParent(View view) {
if (view != null) {
ViewParent parent = view.getParent();
if (parent != null && parent instanceof ViewGroup) {
ViewGroup group = (ViewGroup) parent;
group.removeView(view);
}
}
}
/**
* 判断触点是否落在该View上
*/
public static boolean isTouchInView(MotionEvent ev, View v) {
int[] vLoc = new int[2];
v.getLocationOnScreen(vLoc);
float motionX = ev.getRawX();
float motionY = ev.getRawY();
return motionX >= vLoc[0] && motionX <= (vLoc[0] + v.getWidth())
&& motionY >= vLoc[1] && motionY <= (vLoc[1] + v.getHeight());
}
}
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除了以上常用工具类，还提供了对一些常用开源框架的辅助工具类，如下：
14.GlideUtils（Glide框架相关）
/**
* 用Glide框架加载图片的时候根据图片尺寸让ImageView自适应
* Created by gc on 2016/11/6.
*/
public class GlideUtils {
private GlideUtils() {
throw new UnsupportedOperationException("cannot be instantiated");
}
/**
* 加载图片
* @param view
* @param url
* @param targetWidth
*/
public static void loadImage(ImageView view, String url, final int targetWidth) {
Glide.with(view.getContext())
.load(url)
.into(new ImageViewTarget<GlideDrawable>(view) {
@Override
protected void setResource(GlideDrawable resource) {
autoFit(view, targetWidth, resource.getIntrinsicWidth(), resource.getIntrinsicHeight());
view.setImageDrawable(resource);
}
});
}
public static void autoFit(ImageView imageView, int targetWidth, int photoWidth, int photoHeight) {
float ratio = (targetWidth + 0f) / photoWidth;
ViewGroup.LayoutParams params = imageView.getLayoutParams();
if (params == null) {
params = new ViewGroup.LayoutParams(targetWidth, (int) (photoHeight * ratio));
} else {
params.width = targetWidth;
params.height = (int) (photoHeight * ratio);
}
imageView.setLayoutParams(params);
}
}
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15.GsonUtils
public class GsonUtils {
private GsonUtils() {
throw new UnsupportedOperationException("cannot be instantiated");
}
/**
* 把一个map变成json字符串
*
* @param map
* @return
*/
public static String parseMapToJson(Map<?, ?> map) {
try {
Gson gson = new Gson();
return gson.toJson(map);
} catch (Exception e) {
}
return null;
}
/**
* 把一个json字符串变成对象
*
* @param json
* @param cls
* @return
*/
public static <T> T parseJsonToBean(String json, Class<T> cls) {
Gson gson = new Gson();
T t = null;
try {
t = gson.fromJson(json, cls);
} catch (Exception e) {
}
return t;
}
/**
* 把json字符串变成map
*
* @param json
* @return
*/
public static HashMap<String, Object> parseJsonToMap(String json) {
Gson gson = new Gson();
Type type = new TypeToken<HashMap<String, Object>>() {
}.getType();
HashMap<String, Object> map = null;
try {
map = gson.fromJson(json, type);
} catch (Exception e) {
}
return map;
}
/**
* 把json字符串变成集合
* params: new TypeToken<List<yourbean>>(){}.getType(),
*
* @param json
* @param type new TypeToken<List<yourbean>>(){}.getType()
* @return
*/
public static List<?> parseJsonToList(String json, Type type) {
Gson gson = new Gson();
List<?> list = gson.fromJson(json, type);
return list;
}
/**
* 获取json串中某个字段的值，注意，只能获取同一层级的value
*
* @param json
* @param key
* @return
*/
public static String getFieldValue(String json, String key) {
if (TextUtils.isEmpty(json))
return null;
if (!json.contains(key))
return "";
JSONObject jsonObject = null;
String value = null;
try {
jsonObject = new JSONObject(json);
value = jsonObject.getString(key);
} catch (JSONException e) {
e.printStackTrace();
}
return value;
}
}
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如果有更好的建议或者更好的Utils，请发私信或者留言。