Android直接复制使用的工具类

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1.打印LogUItil

/**  * Log统一管理类  *   *   *   */  public class LogUtils  {      private LogUtils()      {          /* cannot be instantiated */          throw new UnsupportedOperationException("cannot be instantiated");      }      public static boolean isDebug = true;// 是否需要打印bug，可以在application的onCreate函数里面初始化      private static final String TAG = "way";      // 下面四个是默认tag的函数      public static void i(String msg)      {          if (isDebug)              Log.i(TAG, msg);      }      public static void d(String msg)      {          if (isDebug)              Log.d(TAG, msg);      }      public static void e(String msg)      {          if (isDebug)              Log.e(TAG, msg);      }      public static void v(String msg)      {          if (isDebug)              Log.v(TAG, msg);      }      // 下面是传入自定义tag的函数      public static void i(String tag, String msg)      {          if (isDebug)              Log.i(tag, msg);      }      public static void d(String tag, String msg)      {          if (isDebug)              Log.i(tag, msg);      }      public static void e(String tag, String msg)      {          if (isDebug)              Log.i(tag, msg);      }      public static void v(String tag, String msg)      {          if (isDebug)              Log.i(tag, msg);      }  }

2.Toast的工具类

/**  * Toast统一管理类  *   */  public class ToastUtils  {      private ToastUtils()      {          /* cannot be instantiated */          throw new UnsupportedOperationException("cannot be instantiated");      }      public static boolean isShow = true;      /**      * 短时间显示Toast      *       * @param context      * @param message      */      public static void showShort(Context context, CharSequence message)      {          if (isShow)              Toast.makeText(context, message, Toast.LENGTH_SHORT).show();      }      /**      * 短时间显示Toast      *       * @param context      * @param message      */      public static void showShort(Context context, int message)      {          if (isShow)              Toast.makeText(context, message, Toast.LENGTH_SHORT).show();      }      /**      * 长时间显示Toast      *       * @param context      * @param message      */      public static void showLong(Context context, CharSequence message)      {          if (isShow)              Toast.makeText(context, message, Toast.LENGTH_LONG).show();      }      /**      * 长时间显示Toast      *       * @param context      * @param message      */      public static void showLong(Context context, int message)      {          if (isShow)              Toast.makeText(context, message, Toast.LENGTH_LONG).show();      }      /**      * 自定义显示Toast时间      *       * @param context      * @param message      * @param duration      */      public static void show(Context context, CharSequence message, int duration)      {          if (isShow)              Toast.makeText(context, message, duration).show();      }      /**      * 自定义显`这里写代码片`示Toast时间      *       * @param context      * @param message      * @param duration      */      public static void show(Context context, int message, int duration)      {          if (isShow)              Toast.makeText(context, message, duration).show();      }  }

3.SPUtil

public class SPUtils  {      /**      * 保存在手机里面的文件名      */      public static final String FILE_NAME = "share_data";      /**      * 保存数据的方法，我们需要拿到保存数据的具体类型，然后根据类型调用不同的保存方法      *       * @param context      * @param key      * @param object      */      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);      }      /**      * 得到保存数据的方法，我们根据默认值得到保存的数据的具体类型，然后调用相对于的方法获取值      *       * @param context      * @param key      * @param defaultObject      * @return      */      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值已经对应的值      * @param context      * @param key      */      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      * @param context      */      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      * @param context      * @param key      * @return      */      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      *       * @param context      * @return      */      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      *       * @author zhy      *       */      private static class SharedPreferencesCompat      {          private static final Method sApplyMethod = findApplyMethod();          /**          * 反射查找apply的方法          *           * @return          */          @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          *           * @param editor          */          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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