Android用于校验集合参数的小封装示例

/**
 * Created by Jlanglang on 2017/9/4 0004.
 */

public class SimpleParams extends HashMap<String,Object> {
 //这里放key,与校验失败后的提示内容
 private HashMap<Object,String> checkParams = new HashMap<>();

 public static SimpleParams create() {
 return new SimpleParams();
 }
 //返回this,链式编程
 public SimpleParams putP(String key,Object value) {
 this.putP(key,value,"");
 return this;
 }

 public SimpleParams putP(String key,Object value,String emptyMessage) {
 this.put(key,value);
 checkParams.put(key,emptyMessage);
 return this;
 }

 /**
 * 检查params
 *
 * @param context
 * @return
 */
 public boolean checkValue(Context context) {
 return checkValue(context,null);
 }

 /**
 * 检查params
 *
 * @param context
 * @return
 */
 public boolean checkValue(Context context,CheckParamsCallback checkParamsCallback) {
 Set<String> strings = keySet();
 for (String str : strings) {
  Object value = get(str);
  if (value == null || "".equals(value)) {
  String s = checkParams.get(str);
  //emptyMessage则说明,该参数不校验
  if (!TextUtils.isEmpty(s)) {
   //传入回调,自定义处理
   if (checkParamsCallback != null) {
   checkParamsCallback.callBack(s);
   } else {
   //默认Toast提示.
   Toast.makeText(context,s,Toast.LENGTH_SHORT).show();
   }
   return false;
  }
  }
 }
 return true;
 }

 public interface CheckParamsCallback {
 void callBack(String s);
 }
}