本文實例為大家分享了Android實現搜索歷史的具體代碼，供大家參考，具體內容如下

SharedPreferences實現本地搜索歷史功能，覆蓋搜索重復的文本，可清空

1. 判斷搜索內容是否含表情，不需要可以不判斷

/** * 校驗字符串是否含有表情 * @param content * @return */ public static boolean hasEmoji(String content){ Pattern pattern = Pattern.compile('[ud83cudc00-ud83cudfff]|[ud83dudc00-ud83dudfff]|[u2600-u27ff]'); Matcher matcher = pattern.matcher(content); if(matcher .find()){ return true; } return false;}

2.軟鍵盤工具類彈出、關閉，不需要可以不判斷

public class KeyBoardUtils { /** * 打開軟鍵盤 * * @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); } /** * 關閉軟鍵盤 * @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); } /** * 判斷軟鍵盤是否顯示 * @param activity * @return */ public static boolean isSoftShowing(Activity activity) { //獲取當前屏幕內容的高度 int screenHeight = activity.getWindow().getDecorView().getHeight(); //獲取View可見區域的bottom Rect rect = new Rect(); //DecorView即為activity的頂級view activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(rect); //考慮到虛擬導航欄的情況（虛擬導航欄情況下：screenHeight = rect.bottom + 虛擬導航欄高度） //選取screenHeight*2/3進行判斷 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); } } } /** * 打開軟鍵盤 */ 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); } /** * 點擊空白處關閉軟鍵盤 */ 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.存儲工具類

import android.annotation.TargetApi;import android.content.Context;import android.content.SharedPreferences;import android.os.Build; /** * @author Administrator * SharedPreferences使用工具類 */@TargetApi(Build.VERSION_CODES.GINGERBREAD)public class SPUtils { private static SharedPreferences sp; private static SPUtils instance = new SPUtils(); public static Context mContext; /** * 保存在手機里面的文件名 */ public static final String FILE_NAME = 'maigoo'; private SPUtils() { } /** * xxx改為你想保存的sp文件名稱 */ public static SPUtils getInstance(Context context) { mContext = context; if (sp == null) { sp = context.getApplicationContext().getSharedPreferences(FILE_NAME, Context.MODE_PRIVATE); } return instance; } /** * 保存數據 */ 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. 讀取數據 */ 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); } /** * 讀取數據 * * @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; } /** * 保存搜索記錄 * * @param keyword */ public void save(String keyword) { // 獲取搜索框信息 SharedPreferences mysp = mContext.getSharedPreferences('search_history', 0); String old_text = mysp.getString('history', ''); // 利用StringBuilder.append新增內容，逗號便于讀取內容時用逗號拆分開 StringBuilder builder = new StringBuilder(old_text); builder.append(keyword + ','); // 判斷搜索內容是否已經存在于歷史文件，已存在則不重復添加 if (!old_text.contains(keyword + ',')) { SharedPreferences.Editor myeditor = mysp.edit(); myeditor.putString('history', builder.toString()); myeditor.commit(); } } public String[] getHistoryList() { // 獲取搜索記錄文件內容 SharedPreferences sp = mContext.getSharedPreferences('search_history', 0); String history = sp.getString('history', ''); // 用逗號分割內容返回數組 String[] history_arr = history.split(','); // 保留前50條數據 if (history_arr.length > 50) { String[] newArrays = new String[50]; System.arraycopy(history_arr, 0, newArrays, 0, 50); } return history_arr; } /** * 清除搜索記錄 */ public void cleanHistory() { SharedPreferences sp = mContext.getSharedPreferences('search_history', 0); SharedPreferences.Editor editor = sp.edit(); editor.clear(); editor.commit(); }}

4.Activity主要功能實現

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 { //搜索為空 } } }); } private boolean isNullorEmpty(String str) { return str == null || ''.equals(str); } /** * 初始化 歷史記錄列表 */ 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; } //有數據往下走 final int j = i; //添加分類塊 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());//光標在最后 if (!isNullorEmpty(data[j])) { SPUtils.getInstance(Main2Activity.this).save(autoSearch.getText().toString()); } //點擊事件 } }); // 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: 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: /> <kemizhibo.rhkj.com.ijkpalaydemo.ZFlowLayout android: 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: 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：自定義搜索標簽布局 * @Version:v1.0.0 *****************************/ public class ZFlowLayout extends ViewGroup { /** * 存儲所有子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) { //父控件傳進來的寬度和高度以及對應的測量模式 int sizeWidth = MeasureSpec.getSize(widthMeasureSpec); int modeWidth = MeasureSpec.getMode(widthMeasureSpec); int sizeHeight = MeasureSpec.getSize(heightMeasureSpec); int modeHeight = MeasureSpec.getMode(heightMeasureSpec); //如果當前ViewGroup的寬高為wrap_content的情況 //自己測量的寬度 int width = 0; //自己測量的高度 int height = 0; //記錄每一行的寬度和高度 int lineWidth = 0; int lineHeight = 0; //獲取子view的個數 int childCount = getChildCount(); for (int i = 0; i < childCount; i++) { View child = getChildAt(i); //測量子View的寬和高 measureChild(child, widthMeasureSpec, heightMeasureSpec); //得到LayoutParams MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams(); //子View占據的寬度 int childWidth = child.getMeasuredWidth() + lp.leftMargin + lp.rightMargin; //子View占據的高度 int childHeight = child.getMeasuredHeight() + lp.topMargin + lp.bottomMargin; //換行時候 if (lineWidth + childWidth > sizeWidth) { //對比得到最大的寬度 width = Math.max(width, lineWidth); //重置lineWidth lineWidth = childWidth; //記錄行高 height += lineHeight; lineHeight = childHeight; } else {//不換行情況 //疊加行寬 lineWidth += childWidth; //得到最大行高 lineHeight = Math.max(lineHeight, childHeight); } //處理最后一個子View的情況 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(); //獲取當前ViewGroup的寬度 int width = getWidth(); int lineWidth = 0; int lineHeight = 0; //記錄當前行的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(); //如果需要換行 if (childWidth + lineWidth + lp.leftMargin + lp.rightMargin > width) { //記錄LineHeight mLineHeight.add(lineHeight); //記錄當前行的Views mAllChildViews.add(lineViews); //重置行的寬高 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); } //處理最后一行 mLineHeight.add(lineHeight); mAllChildViews.add(lineViews); //設置子View的位置 int left = 0; int top = 0; //獲取行數 int lineCount = mAllChildViews.size(); for (int i = 0; i < lineCount; i++) { //當前行的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); //判斷是否顯示 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(); //進行子View進行布局 child.layout(cLeft, cTop, cRight, cBottom); left += child.getMeasuredWidth() + lp.leftMargin + lp.rightMargin; } left = 0; top += lineHeight; } } /** * 與當前ViewGroup對應的LayoutParams */ @Override public LayoutParams generateLayoutParams(AttributeSet attrs) { return new MarginLayoutParams(getContext(), attrs); }}

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持好吧啦網。