搜索商品

package com.bwie.jingdong.activity;

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.bwie.jingdong.R;
import com.bwie.jingdong.custom.LiuShiBuJu;
import com.bwie.jingdong.dao.Dao;

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

public class SuoSouActivity extends AppCompatActivity {
    private String mNames[] = {
            "袜子", "汾酒", "婴儿爬行垫",
            "电压力锅", "煲汤锅砂锅"};
    private ImageView image_fanhui;
    private EditText text_name;
    private LiuShiBuJu ls;
    private ListView lv;
    private Dao dao;
    private List<String> select;
    private Button btn;
    private ArrayAdapter<String> adapter;
    List<String> a=new ArrayList<>();
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_suo_sou);
        image_fanhui = findViewById(R.id.image_fanhui);
        text_name = findViewById(R.id.text_name);
        ls = findViewById(R.id.ls);
        lv = findViewById(R.id.lv);
        btn = findViewById(R.id.btn);
        image_fanhui.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                finish();
            }
        });
        dao = new Dao(SuoSouActivity.this);
        select = dao.select();
        adapter = new ArrayAdapter<String>(SuoSouActivity.this,android.R.layout.simple_list_item_1, android.R.id.text1,select);
        lv.setAdapter(adapter);
        lv.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
            @Override
            public boolean onItemLongClick(AdapterView<?> adapterView, View view, final int d, long l) {
                AlertDialog.Builder builder = new AlertDialog.Builder(SuoSouActivity.this);
                builder.setTitle("是否删除");
                builder.setPositiveButton("确认", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        int delYi = dao.delYi(select.get(d).toString());
                        if (delYi==1){
                            zhanshi();
                        }
                    }
                });
                builder.setNegativeButton("取消",null);
                builder.show();
                return false;
            }
        });

        if (select.size()>0){
            btn.setVisibility(View.VISIBLE);
        }else if(select.size()==0){
            btn.setVisibility(View.INVISIBLE);
        }
        initChildViews();
    }

    private void zhanshi() {
        List<String> sel4 = dao.select();
        ArrayAdapter<String> ada = new ArrayAdapter<String>(SuoSouActivity.this, android.R.layout.simple_list_item_1, android.R.id.text1, sel4);
        lv.setAdapter(ada);
    }

    private void initChildViews() {
        ViewGroup.MarginLayoutParams lp = new ViewGroup.MarginLayoutParams(
                ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        lp.leftMargin = 10;
        lp.rightMargin = 10;
        lp.topMargin = 5;
        lp.bottomMargin = 5;
        for (int i = 0; i < mNames.length; i++) {
            TextView view = new TextView(this);
            view.setText(mNames[i]);
            view.setTextColor(Color.WHITE);
            final int finalI = i;
            view.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    Toast.makeText(SuoSouActivity.this,mNames[finalI], Toast.LENGTH_SHORT).show();
                }
            });
            view.setBackgroundDrawable(getResources().getDrawable(R.drawable.textview_bg));
            ls.addView(view, lp);
        }
    }

    public void delall(View view) {
        dao.del();
        List<String> select2 = dao.select();
        ArrayAdapter<String> adapter2 = new ArrayAdapter<String>(SuoSouActivity.this, android.R.layout.simple_list_item_1, android.R.id.text1, select2);
        lv.setAdapter(adapter2);
        Toast.makeText(this, "清楚成功", Toast.LENGTH_SHORT).show();
        //没有记录隐藏
        btn.setVisibility(View.INVISIBLE);
    }

    public void add(View view) {
        String keywords = text_name.getText().toString();
        dao.insert(keywords);
        btn.setVisibility(View.VISIBLE);

        List<String> sel3 = dao.select();
        a.add(0,keywords);
        ArrayAdapter<String> adapter3 = new ArrayAdapter<>(SuoSouActivity.this, android.R.layout.simple_list_item_1, android.R.id.text1, a);
        lv.setAdapter(adapter3);

        Intent intent = new Intent(SuoSouActivity.this,LieBiaoActivity.class);
        intent.putExtra("keywords",keywords);
        startActivity(intent);
    }
}

布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.bwie.jingdong.activity.SuoSouActivity">
    <LinearLayout
        android:layout_marginTop="10dp"
        android:orientation="horizontal"
        android:layout_width="match_parent"
        android:layout_height="40dp">
        <ImageView
            android:id="@+id/image_fanhui"
            android:layout_marginLeft="-10dp"
            android:layout_marginTop="7dp"
            android:src="@drawable/back2"
            android:layout_width="75dp"
            android:layout_height="20dp"/>
        <EditText
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_weight="9"
            android:background="@null"
            android:id="@+id/text_name"
            android:hint="请输入关键字"
            android:textColor="#000"/>
        <Button
            android:layout_weight="2"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:text="搜索"
            android:onClick="add"
            android:layout_gravity="center" />
    </LinearLayout>
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:textColor="#000"
        android:textSize="20sp"
        android:text="热搜"
        android:paddingLeft="5dp"
        android:textStyle="bold"/>
    <com.bwie.jingdong.custom.LiuShiBuJu
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:id="@+id/ls">

    </com.bwie.jingdong.custom.LiuShiBuJu>
    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:textColor="#000"
        android:textSize="20sp"
        android:id="@+id/tv_tip"
        android:text="历史搜索"
        android:paddingLeft="5dp"
        android:textStyle="bold"/>
    <ListView
        android:layout_width="match_parent"
        android:layout_height="300dp"
        android:id="@+id/lv"></ListView>
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="清空历史记录"
        android:layout_gravity="center"
        android:gravity="center"
        android:onClick="delall"
        android:visibility="invisible"
        android:id="@+id/btn" />
</LinearLayout>

dao层

package com.bwie.jingdong.dao;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;

import com.bwie.jingdong.helper.MyHelper;

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

/**
 * Created by lenovo on 2017/12/28.
 */

public class Dao {

    MyHelper helper;

    public Dao(Context context) {
        helper = new MyHelper(context);
    }

    public List<String> select() {
        SQLiteDatabase database = helper.getReadableDatabase();
        List<String> list=new ArrayList<>();
        Cursor cursor = database.rawQuery("select * from shuju1", null);
        while(cursor.moveToNext()){
            String string = cursor.getString(1);
            list.add(string);
        }
        database.close();
        return list;
    }

    public int delYi(String s) {
        SQLiteDatabase database = helper.getWritableDatabase();
        database.execSQL("delete from shuju1 where json=?",new String[]{s});
        database.close();
        return 1;
    }

    public void insert(String json) {
        SQLiteDatabase database = helper.getWritableDatabase();
        ContentValues values = new ContentValues();
        values.put("json",json);
        database.insert("shuju1",null,values);
        database.close();
    }

    public void del() {
        SQLiteDatabase database = helper.getWritableDatabase();
        database.execSQL("delete from shuju1");
        database.close();
    }
}

helper

package com.bwie.jingdong.helper;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

/**
 * Created by lenovo on 2017/12/28.
 */

public class MyHelper extends SQLiteOpenHelper{
    public MyHelper(Context context) {
        super(context,"sss.db",null,2);
    }

    @Override
    public void onCreate(SQLiteDatabase sqLiteDatabase) {
        sqLiteDatabase.execSQL("create table shuju1(id integer primary key autoincrement,json text not null)");
    }

    @Override
    public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {

    }
}