101.android 簡單的搜索時改變被搜索字段的字體顏色+搜索時改變被搜索字段的背景顏色

/**
 * 方法名：putstr(String keyword, String strtext, Context context)
 * 功    能：搜索時改變被搜索字段的字體顏色
 * 參    數：String keyword, String strtext, Context context
 * 返回值：SpannableStringBuilder
 */
public static SpannableStringBuilder putstr(String strText, String keyWord, Context context) {
    //keyWord是傳的搜索的string，strText傳的是當前item的全部string
    String docInfo = strText;
    int keywordIndex = strText.indexOf(keyWord);
    SpannableStringBuilder style = new SpannableStringBuilder(docInfo);
    while (keywordIndex != -1) {
        /**
         * 關鍵字顏色改變
         */
        style.setSpan(new ForegroundColorSpan(context.getResources().getColor(R.color.colorAccent)), keywordIndex, keywordIndex + keyWord.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        int tempkeywordTempIndex = keywordIndex + keyWord.length();
        strText = docInfo.substring(tempkeywordTempIndex, docInfo.length());
        keywordIndex = strText.indexOf(keyWord);
        if (keywordIndex != -1) {
            keywordIndex = keywordIndex + tempkeywordTempIndex;
        }
    }
    return style;
}


/**
 * 方法名：putBackgroundStr(String text, String seachText, Context context)
 * 功    能：搜索時改變被搜索字段的背景顏色
 * 參    數：String text, String seachText, Context context
 * 返回值：SpannableString
 */
public static SpannableString putBackgroundStr(String text, String seachText, Context context) {
    //text傳的是當前item的全部string，seachText是傳的搜索的string
    int keywordIndex = text.indexOf(seachText);
    SpannableString spanString = new SpannableString(text);
    BackgroundColorSpan span = new BackgroundColorSpan(context.getResources().getColor(R.color.colorAccent));
    spanString.setSpan(span, keywordIndex, keywordIndex + seachText.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    return spanString;
}

 

//例：

 

//第一步 activity_main_user.xml：

 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    >
    <SearchView
        android:queryHint="搜索"
        android:iconifiedByDefault="false"
        android:background="#cac5c5"
        android:id="@+id/mSearchView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

    <!-- 爲SearchView定義自動補齊的ListView-->
    <ListView
        android:id="@+id/mListView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</LinearLayout>

//第二步 MainUserActivity代碼：

package com.gang.app.myceshi;

import android.content.Context;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.text.Spannable;
import android.text.SpannableString;
import android.text.SpannableStringBuilder;
import android.text.TextUtils;
import android.text.style.BackgroundColorSpan;
import android.text.style.ForegroundColorSpan;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.SearchView;
import android.widget.TextView;
import android.widget.Toast;

import com.gang.app.myceshi.bean.User;

import java.util.ArrayList;
import java.util.List;

public class MainUserActivity extends AppCompatActivity {

    private List<User> mData = new ArrayList<User>();  // 這個數據會改變
    private List<User> mBackData;  // 這是原始的數據

    private ListView mListView;
    private SearchView mSearchView;
    private MyAdapter mAdapter;
    private String seachText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main_user);
        mListView = (ListView) super.findViewById(R.id.mListView);
        mSearchView = (SearchView) super.findViewById(R.id.mSearchView);
        //添加數據
        initData();

        // 設置監聽器
        mSearchView.setOnQueryTextListener(new QueryListener());
        mListView.setTextFilterEnabled(true);
        mListView.setOnItemClickListener(new ItemClick());
        //適配器
        mAdapter = new MyAdapter(this);
        mListView.setAdapter(mAdapter);
    }

    //我這裏寫的是死數據,也可以用User這個Bean類動態添加數據
    private void initData() {
        mData.add(new User(R.mipmap.ic_launcher, "張三"));
        mData.add(new User(R.mipmap.ic_launcher, "李四"));
        mData.add(new User(R.mipmap.ic_launcher, "王五"));
        mData.add(new User(R.mipmap.ic_launcher, "趙六"));
        //mBackData用來搜索框清空後回覆到原始的數據
        mBackData = mData;
    }

    // 必須實現Filterable接口
    private class MyAdapter extends BaseAdapter implements Filterable {
        private MyFilter mFilter;
        private Context context;

        public MyAdapter(Context context) {
            this.context = context;
        }

        @Override
        public int getCount() {
            return mData.size();
        }

        @Override
        public Object getItem(int position) {
            return mData.get(position);
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            if (null == convertView) {
                convertView = View.inflate(MainUserActivity.this, R.layout.item_layout, null);
            }

            TextView textView = (TextView) convertView.findViewById(R.id.mText);
            ImageView mImg = (ImageView) convertView.findViewById(R.id.mImg);
            mImg.setImageResource(mData.get(position).getImg());

            String name = mData.get(position).getName();

            //在這裏設置搜索時變顏色
            if (!TextUtils.isEmpty(seachText)) {
                SpannableStringBuilder putstr = putstr(name, seachText, context);
                textView.setText(putstr);
//                SpannableString string = putBackgroundStr(name, seachText, MainUserActivity.this);
//                textView.setText(string);
            } else {
                textView.setText(name);
            }
            return convertView;
        }

        @Override
        public Filter getFilter() {
            if (null == mFilter) {
                mFilter = new MyFilter();
            }
            return mFilter;
        }

        // 自定義Filter類
        class MyFilter extends Filter {
            @Override
            // 該方法在子線程中執行
            // 自定義過濾規則
            protected FilterResults performFiltering(CharSequence constraint) {
                FilterResults results = new FilterResults();

                List<User> newValues = new ArrayList<User>();
                String filterString = constraint.toString().trim().toLowerCase();

                // 如果搜索框內容爲空，就恢復原始數據
                if (TextUtils.isEmpty(filterString)) {
                    newValues = mBackData;
                } else {
                    // 過濾出新數據
                    for (int i = 0; i < mBackData.size(); i++) {
                        //通過這個判斷進行過濾,通過mBackData.get(i).getName()進行過濾
                        if (-1 != mBackData.get(i).getName().toLowerCase().indexOf(filterString)) {
                            newValues.add(mBackData.get(i));
                        }
                    }
                }
                results.values = newValues;
                results.count = newValues.size();
                return results;
            }

            @Override
            protected void publishResults(CharSequence constraint,
                                          FilterResults results) {
                mData = (List<User>) results.values;

                if (results.count > 0) {
                    mAdapter.notifyDataSetChanged();  // 通知數據發生了改變
                } else {
                    mAdapter.notifyDataSetInvalidated(); // 通知數據失效
                }
            }
        }
    }

    // 搜索文本監聽器
    private class QueryListener implements SearchView.OnQueryTextListener {
        // 當內容被提交時執行
        @Override
        public boolean onQueryTextSubmit(String query) {
            return false;
        }

        // 當搜索框內內容發生改變時執行
        @Override
        public boolean onQueryTextChange(String newText) {

            if (TextUtils.isEmpty(newText)) {
                mListView.clearTextFilter();  // 清楚ListView的過濾
                seachText = null;
            } else {
                mListView.setFilterText(newText); // 設置ListView的過濾關鍵詞
                //隱藏彈出的黑框
                mListView.dispatchDisplayHint(View.INVISIBLE);
                seachText = newText;
            }
            return true;
        }
    }

    //ListView的item點擊事件
    private class ItemClick implements AdapterView.OnItemClickListener {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            Toast.makeText(MainUserActivity.this, mData.get(position).getName(), Toast.LENGTH_SHORT).show();
        }
    }

    /**
     * 方法名：putstr(String keyword, String strtext, Context context)
     * 功    能：搜索時改變被搜索字段的字體顏色
     * 參    數：String keyword, String strtext, Context context
     * 返回值：SpannableStringBuilder
     */
    public static SpannableStringBuilder putstr(String strText, String keyWord, Context context) {
        //keyWord是傳的搜索的string，strText傳的是當前item的全部string
        String docInfo = strText;
        int keywordIndex = strText.indexOf(keyWord);
        SpannableStringBuilder style = new SpannableStringBuilder(docInfo);
        while (keywordIndex != -1) {
            /**
             * 關鍵字顏色改變
             */
            style.setSpan(new ForegroundColorSpan(context.getResources().getColor(R.color.colorAccent)), keywordIndex, keywordIndex + keyWord.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
            int tempkeywordTempIndex = keywordIndex + keyWord.length();
            strText = docInfo.substring(tempkeywordTempIndex, docInfo.length());
            keywordIndex = strText.indexOf(keyWord);
            if (keywordIndex != -1) {
                keywordIndex = keywordIndex + tempkeywordTempIndex;
            }
        }
        return style;
    }


    /**
     * 方法名：putBackgroundStr(String text, String seachText, Context context)
     * 功    能：搜索時改變被搜索字段的背景顏色
     * 參    數：String text, String seachText, Context context
     * 返回值：SpannableString
     */
    public static SpannableString putBackgroundStr(String text, String seachText, Context context) {
        //text傳的是當前item的全部string，seachText是傳的搜索的string
        int keywordIndex = text.indexOf(seachText);
        SpannableString spanString = new SpannableString(text);
        BackgroundColorSpan span = new BackgroundColorSpan(context.getResources().getColor(R.color.colorAccent));
        spanString.setSpan(span, keywordIndex, keywordIndex + seachText.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        return spanString;
    }

}

 //第三步 item_layout.xml : 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    >

    <ImageView
        android:id="@+id/mImg"
        android:src="@mipmap/ic_launcher"
        android:layout_weight="1"
        android:layout_width="0dp"
        android:layout_height="100dp" />

    <TextView
        android:id="@+id/mText"
        android:gravity="center"
        android:layout_weight="1"
        android:layout_width="0dp"
        android:layout_height="100dp" />
    <TextView
        android:text="年齡18"
        android:gravity="center"
        android:layout_weight="1"
        android:layout_width="0dp"
        android:layout_height="100dp" />
    <TextView
        android:text="性別男"
        android:gravity="center"
        android:layout_weight="1"
        android:layout_width="0dp"
        android:layout_height="100dp" />
    <TextView
        android:text="北京"
        android:gravity="center"
        android:layout_weight="1"
        android:layout_width="0dp"
        android:layout_height="100dp" />

</LinearLayout>

 //第四步 User實體Bean類：

public class User {

    private int img;
    private String name;

    public User(int img, String name) {
        this.img = img;
        this.name = name;
    }

    public int getImg() {
        return img;
    }

    public void setImg(int img) {
        this.img = img;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

 //--------------------------------------------------------------------------------完--------------------------------------------------------------------------------