Android实现搜索历史功能
作者：天才第一步_
这篇文章主要为大家详细介绍了Android实现搜索历史功能，文中示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下
本文实例为大家分享了Android实现搜索历史的具体代码，供大家参考，具体内容如下
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();
}
}
}
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 adapter_search_keyword
<?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" />
6.ZFlowLayout
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);
}
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。