Android 实现搜索历史(1)

SharedPreferences实现本地搜索历史功能,覆盖搜索重复的文本，可清空

 

1. 判断搜索内容是否含表情，不需要可以不判断

    /**
     * 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;
    }

2.软键盘工具类弹出、关闭，不需要可以不判断

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*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();
        }
    }
 
}

3.存储工具类

 
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();
    }
}
 

4.Activity主要功能实现

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();
        }
    }
}

5.布局文件activity_main2.xml

<?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>

adapter_search_keyword.xml

<?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"
     />

ZFlowLayout.java

 
 
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);
    }
}

文章来源：https://blog.csdn.net/qq_39734239/article/details/100888193