Android实现搜索历史功能

/**
  * 校验字符串是否含有表情
  * @param content
  * @return
  */
 public static boolean hasEmoji(String content){
 
  Pattern pattern = Pattern.compile("[\ud83c\udc00-\ud83c\udfff]|[\ud83d\udc00-\ud83d\udfff]|[\u2600-\u27ff]");
  Matcher matcher = pattern.matcher(content);
  if(matcher .find()){
   return true;
  }
  return false;
}

public class KeyBoardUtils {
 
 /**
  * 打开软键盘
  *
  * @param editText
  * @param context
  */
 public static void openKeybord(EditText editText, Context context) {
  InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
  imm.showSoftInput(editText, InputMethodManager.RESULT_SHOWN);
  imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, InputMethodManager.HIDE_IMPLICIT_ONLY);
 }
 
 /**
  * 关闭软键盘
  * @param editText
  * @param context
  */
 public static void closeKeybord(EditText editText, Context context) {
  InputMethodManager imm = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
  imm.hideSoftInputFromWindow(editText.getWindowToken(), 0);
 }
 /**
  * 判断软键盘是否显示
  * @param activity
  * @return
  */
 public static boolean isSoftShowing(Activity activity) {
  //获取当前屏幕内容的高度
  int screenHeight = activity.getWindow().getDecorView().getHeight();
  //获取View可见区域的bottom
  Rect rect = new Rect();
  //DecorView即为activity的顶级view
  activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(rect);
  //考虑到虚拟导航栏的情况（虚拟导航栏情况下：screenHeight = rect.bottom + 虚拟导航栏高度）
  //选取screenHeight*2/3进行判断
  return screenHeight*2/3 > rect.bottom;
 }
 
 public static void hintKeyboard(Activity activity) {
  InputMethodManager imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
  if (imm.isActive() && activity.getCurrentFocus() != null) {
   if (activity.getCurrentFocus().getWindowToken() != null) {
    imm.hideSoftInputFromWindow(activity.getCurrentFocus().getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS);
   }
 
  }
 }
 /**
  * 打开软键盘
  */
 public static void openKeyboard(Handler mHandler, int s, final Activity activity) {
  mHandler.postDelayed(new Runnable() {
   @Override
   public void run() {
    InputMethodManager imm = (InputMethodManager) activity.getSystemService(Context.INPUT_METHOD_SERVICE);
    imm.toggleSoftInput(0, InputMethodManager.HIDE_NOT_ALWAYS);
   }
  }, s);
 }
 
 /**
  * 点击空白处关闭软键盘
  */
 
 public static void inputClose(View view, Context context) {
  if (view instanceof EditText) {
   view.clearFocus();
  }
  try {
   InputMethodManager im = (InputMethodManager)
     context.getSystemService(Context.INPUT_METHOD_SERVICE);
   im.hideSoftInputFromWindow(view.getWindowToken(), 0);
  } catch (NullPointerException e) {
   e.printStackTrace();
  }
 }
 
}

import android.annotation.TargetApi;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Build;
 
/**
 * @author Administrator
 *   SharedPreferences使用工具类
 */
@TargetApi(Build.VERSION_CODES.GINGERBREAD)
public class SPUtils {
 private static SharedPreferences sp;
 private static SPUtils instance = new SPUtils();
 public static Context mContext;
 
 /**
  * 保存在手机里面的文件名
  */
 public static final String FILE_NAME = "maigoo";
 
 private SPUtils() {
 }
 
 /**
  * xxx改为你想保存的sp文件名称
  */
 public static SPUtils getInstance(Context context) {
  mContext = context;
  if (sp == null) {
   sp = context.getApplicationContext().getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE);
  }
  return instance;
 }
 
 /**
  * 保存数据
  */
 public void put(String key, Object value) {
  if (value instanceof Integer) {
   sp.edit().putInt(key, (Integer) value).apply();
  } else if (value instanceof String) {
   sp.edit().putString(key, (String) value).apply();
  } else if (value instanceof Boolean) {
   sp.edit().putBoolean(key, (Boolean) value).apply();
  } else if (value instanceof Float) {
   sp.edit().putFloat(key, (Float) value).apply();
  } else if (value instanceof Long) {
   sp.edit().putLong(key, (Long) value).apply();
  }
 }
 
 /**
  * 2. 读取数据
  */
 public int getInt(String key, int defValue) {
  return sp.getInt(key, defValue);
 }
 
 public String getString(String key, String defValue) {
  return sp.getString(key, defValue);
 }
 
 public boolean getBoolean(String key, boolean defValue) {
  return sp.getBoolean(key, defValue);
 }
 
 /**
  * 读取数据
  *
  * @param key
  * @param defValue
  * @return
  */
 public <T> T get(String key, T defValue) {
  T t = null;
  if (defValue instanceof String || defValue == null) {
   String value = sp.getString(key, (String) defValue);
   t = (T) value;
  } else if (defValue instanceof Integer) {
   Integer value = sp.getInt(key, (Integer) defValue);
   t = (T) value;
  } else if (defValue instanceof Boolean) {
   Boolean value = sp.getBoolean(key, (Boolean) defValue);
   t = (T) value;
  } else if (defValue instanceof Float) {
   Float value = sp.getFloat(key, (Float) defValue);
   t = (T) value;
  }
  return t;
 }
 
 /**
  * 保存搜索记录
  *
  * @param keyword
  */
 public void save(String keyword) {
  // 获取搜索框信息
  SharedPreferences mysp = mContext.getSharedPreferences("search_history", 0);
  String old_text = mysp.getString("history", "");
  // 利用StringBuilder.append新增内容，逗号便于读取内容时用逗号拆分开
  StringBuilder builder = new StringBuilder(old_text);
  builder.append(keyword + ",");
 
  // 判断搜索内容是否已经存在于历史文件，已存在则不重复添加
  if (!old_text.contains(keyword + ",")) {
   SharedPreferences.Editor myeditor = mysp.edit();
   myeditor.putString("history", builder.toString());
   myeditor.commit();
  }
 }
 
 public String[] getHistoryList() {
  // 获取搜索记录文件内容
  SharedPreferences sp = mContext.getSharedPreferences("search_history", 0);
  String history = sp.getString("history", "");
  // 用逗号分割内容返回数组
  String[] history_arr = history.split(",");
  // 保留前50条数据
  if (history_arr.length > 50) {
   String[] newArrays = new String[50];
   System.arraycopy(history_arr, 0, newArrays, 0, 50);
  }
  return history_arr;
 }
 
 /**
  * 清除搜索记录
  */
 public void cleanHistory() {
  SharedPreferences sp = mContext.getSharedPreferences("search_history", 0);
  SharedPreferences.Editor editor = sp.edit();
  editor.clear();
  editor.commit();
 }
}

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
 
import kemizhibo.rhkj.com.ijkpalaydemo.search.KeyBoardUtils;
import kemizhibo.rhkj.com.ijkpalaydemo.search.RegularUtils;
import kemizhibo.rhkj.com.ijkpalaydemo.search.SPUtils;
 
public class Main2Activity extends AppCompatActivity {
 ZFlowLayout historyFl;
 EditText autoSearch;
 Button button_search;
 
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main2);
  historyFl = findViewById(R.id.history_fl);
  autoSearch=findViewById(R.id.autoSearch);
  button_search=findViewById(R.id.button_search);
  initHistory();
  button_search.setOnClickListener(new View.OnClickListener() {
   @Override
   public void onClick(View v) {
    if (KeyBoardUtils.isSoftShowing(Main2Activity.this)) {
     KeyBoardUtils.hintKeyboard(Main2Activity.this);
    }
    String searchKey = autoSearch.getText().toString();
    if (!isNullorEmpty(searchKey)) {
     if (RegularUtils.hasEmoji(autoSearch.getText().toString())) {
      //含有非法字符串
     } else {
      //搜索
      String keyWord = autoSearch.getText().toString();
      if (!isNullorEmpty(keyWord)) {
       SPUtils.getInstance(Main2Activity.this).save(autoSearch.getText().toString());
      }
      initHistory();
     }
    } else {
     //搜索为空
    }
 
   }
  });
 
 
 }
 
 private boolean isNullorEmpty(String str) {
  return str == null || "".equals(str);
 }
 /**
  * 初始化 历史记录列表
  */
 private void initHistory() {
 
  final String[] data = SPUtils.getInstance(Main2Activity.this).getHistoryList();
  ViewGroup.MarginLayoutParams layoutParams = new ViewGroup.MarginLayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
  layoutParams.setMargins(10, 10, 10, 10);
 
  historyFl.removeAllViews();
  for (int i = 0; i < data.length; i++) {
   if (isNullorEmpty(data[i])) {
 
    return;
   }
   //有数据往下走
   final int j = i;
   //添加分类块
   View paramItemView = getLayoutInflater().inflate(R.layout.adapter_search_keyword, null);
   TextView keyWordTv = paramItemView.findViewById(R.id.tv_content);
   keyWordTv.setText(data[j]);
   historyFl.addView(paramItemView, layoutParams);
 
   keyWordTv.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
     if (KeyBoardUtils.isSoftShowing(Main2Activity.this)) {
      KeyBoardUtils.hintKeyboard(Main2Activity.this);
     }
     autoSearch.setText(data[j]);
     autoSearch.setSelection(data[j].length());//光标在最后
     if (!isNullorEmpty(data[j])) {
      SPUtils.getInstance(Main2Activity.this).save(autoSearch.getText().toString());
     }
     //点击事件
    }
   });
   // initautoSearch();
  }
 }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
 android:orientation="vertical"
 xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 tools:context="kemizhibo.rhkj.com.ijkpalaydemo.Main2Activity">
 
 <Button
  android:id="@+id/button_search"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:text="搜索"
 
  />
 <EditText
  android:layout_width="match_parent"
  android:layout_height="40dp"
  android:id="@+id/autoSearch"
  />
 
 <kemizhibo.rhkj.com.ijkpalaydemo.ZFlowLayout
  android:id="@+id/history_fl"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:layout_below="@+id/title"
  android:orientation="vertical" />
 
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
 android:id="@+id/tv_content"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_marginLeft="15dp"
 android:layout_marginTop="12dp"
 android:background="#00f"
 android:paddingBottom="8dp"
 android:paddingLeft="12dp"
 android:paddingRight="12dp"
 android:includeFontPadding="false"
 android:paddingTop="8dp"
 android:textColor="#fff"
  />

import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
 
import java.util.ArrayList;
import java.util.List;
 
/*****************************
 * @Copyright(c) 2014-2018
 * @Author：dengyalan
 * @Date：2018/1/16
 * @Description：自定义搜索标签布局
 * @Version:v1.0.0
 *****************************/
 
public class ZFlowLayout extends ViewGroup {
 /**
  * 存储所有子View
  */
 private List<List<View>> mAllChildViews = new ArrayList<>();
 /**
  * 每一行的高度
  */
 private List<Integer> mLineHeight = new ArrayList<>();
 
 public ZFlowLayout(Context context) {
  this(context, null);
 }
 
 public ZFlowLayout(Context context, AttributeSet attrs) {
  this(context, attrs, 0);
 }
 
 public ZFlowLayout(Context context, AttributeSet attrs, int defStyle) {
  super(context, attrs, defStyle);
 }
 
 @Override
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
  //父控件传进来的宽度和高度以及对应的测量模式
  int sizeWidth = MeasureSpec.getSize(widthMeasureSpec);
  int modeWidth = MeasureSpec.getMode(widthMeasureSpec);
  int sizeHeight = MeasureSpec.getSize(heightMeasureSpec);
  int modeHeight = MeasureSpec.getMode(heightMeasureSpec);
 
  //如果当前ViewGroup的宽高为wrap_content的情况
  //自己测量的宽度
  int width = 0;
  //自己测量的高度
  int height = 0;
  //记录每一行的宽度和高度
  int lineWidth = 0;
  int lineHeight = 0;
 
  //获取子view的个数
  int childCount = getChildCount();
  for (int i = 0; i < childCount; i++) {
   View child = getChildAt(i);
   //测量子View的宽和高
   measureChild(child, widthMeasureSpec, heightMeasureSpec);
   //得到LayoutParams
   MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams();
   //子View占据的宽度
   int childWidth = child.getMeasuredWidth() + lp.leftMargin + lp.rightMargin;
   //子View占据的高度
   int childHeight = child.getMeasuredHeight() + lp.topMargin + lp.bottomMargin;
   //换行时候
   if (lineWidth + childWidth > sizeWidth) {
    //对比得到最大的宽度
    width = Math.max(width, lineWidth);
    //重置lineWidth
    lineWidth = childWidth;
    //记录行高
    height += lineHeight;
    lineHeight = childHeight;
   } else {//不换行情况
    //叠加行宽
    lineWidth += childWidth;
    //得到最大行高
    lineHeight = Math.max(lineHeight, childHeight);
   }
   //处理最后一个子View的情况
   if (i == childCount - 1) {
    width = Math.max(width, lineWidth);
    height += lineHeight;
   }
  }
  //wrap_content
  setMeasuredDimension(modeWidth == MeasureSpec.EXACTLY ? sizeWidth : width,
    modeHeight == MeasureSpec.EXACTLY ? sizeHeight : height);
 }
 
 @Override
 protected void onLayout(boolean changed, int l, int t, int r, int b) {
  mAllChildViews.clear();
  mLineHeight.clear();
  //获取当前ViewGroup的宽度
  int width = getWidth();
 
  int lineWidth = 0;
  int lineHeight = 0;
  //记录当前行的view
  List<View> lineViews = new ArrayList<View>();
  int childCount = getChildCount();
  for (int i = 0; i < childCount; i++) {
   View child = getChildAt(i);
   MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams();
   int childWidth = child.getMeasuredWidth();
   int childHeight = child.getMeasuredHeight();
 
   //如果需要换行
   if (childWidth + lineWidth + lp.leftMargin + lp.rightMargin > width) {
    //记录LineHeight
    mLineHeight.add(lineHeight);
    //记录当前行的Views
    mAllChildViews.add(lineViews);
    //重置行的宽高
    lineWidth = 0;
    lineHeight = childHeight + lp.topMargin + lp.bottomMargin;
    //重置view的集合
    lineViews = new ArrayList();
   }
   lineWidth += childWidth + lp.leftMargin + lp.rightMargin;
   lineHeight = Math.max(lineHeight, childHeight + lp.topMargin + lp.bottomMargin);
   lineViews.add(child);
  }
  //处理最后一行
  mLineHeight.add(lineHeight);
  mAllChildViews.add(lineViews);
 
  //设置子View的位置
  int left = 0;
  int top = 0;
  //获取行数
  int lineCount = mAllChildViews.size();
  for (int i = 0; i < lineCount; i++) {
   //当前行的views和高度
   lineViews = mAllChildViews.get(i);
   lineHeight = mLineHeight.get(i);
   for (int j = 0; j < lineViews.size(); j++) {
    View child = lineViews.get(j);
    //判断是否显示
    if (child.getVisibility() == View.GONE) {
     continue;
    }
    MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams();
    int cLeft = left + lp.leftMargin;
    int cTop = top + lp.topMargin;
    int cRight = cLeft + child.getMeasuredWidth();
    int cBottom = cTop + child.getMeasuredHeight();
    //进行子View进行布局
    child.layout(cLeft, cTop, cRight, cBottom);
    left += child.getMeasuredWidth() + lp.leftMargin + lp.rightMargin;
   }
   left = 0;
   top += lineHeight;
  }
 }
 
 /**
  * 与当前ViewGroup对应的LayoutParams
  */
 @Override
 public LayoutParams generateLayoutParams(AttributeSet attrs) {
  return new MarginLayoutParams(getContext(), attrs);
 }
}