搜索界面布局以及逻辑编写

搜索布局

<?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:background="@color/blue_2196F3">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="50dp">

        <ImageView
            android:id="@+id/search_iv_back"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_marginLeft="10dp"
            android:onClick="onClick"
            android:src="@mipmap/it_back" />

        <EditText
            android:id="@+id/search_et"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:layout_marginLeft="10dp"
            android:layout_toRightOf="@id/search_iv_back"
            android:background="@drawable/dialog_btn_bg"
            android:hint="@string/please_search_info"
            android:paddingLeft="20dp"
            android:paddingTop="10dp"
            android:paddingBottom="10dp"
            android:textColor="@color/black"
            android:textSize="16sp">

            <requestFocus />
        </EditText>

        <ImageView
            android:id="@+id/search_iv_sh"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_centerVertical="true"
            android:layout_marginRight="20dp"
            android:onClick="onClick"
            android:src="@mipmap/search" />
    </RelativeLayout>

    <ListView
        android:id="@+id/search_lv"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:divider="@color/grey_f3f3f3"
        android:dividerHeight="6dp" />

    <TextView
        android:id="@+id/search_tv_empty"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="250dp"
        android:drawableTop="@mipmap/it_searchtext"
        android:gravity="center"
        android:text="@string/date_empty"
        android:textSize="20sp" />

</LinearLayout>

 

逻辑编写

package com.example.easycash;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import com.example.easycash.adapter.AccountAdapter;
import com.example.easycash.db.AccountBean;
import com.example.easycash.db.DBManager;

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

public class SearchActivity extends AppCompatActivity {
    ListView searchLv;
    EditText searchEt;
    TextView emptyTv;
    List<AccountBean>mDatas;   //数据源
    AccountAdapter adapter;    //适配器对象
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_search);
        initView();
        mDatas = new ArrayList<>();
        adapter = new AccountAdapter(this,mDatas);
        searchLv.setAdapter(adapter);
        searchLv.setEmptyView(emptyTv);   //设置无数局时，显示的控件
    }

    private void initView() {
        searchEt = findViewById(R.id.search_et);
        searchLv = findViewById(R.id.search_lv);
        emptyTv = findViewById(R.id.search_tv_empty);
    }

    public void onClick(View view) {
        switch (view.getId()) {
            case R.id.search_iv_back:
                finish();
                break;
            case R.id.search_iv_sh:   //执行搜索的操作
                String msg = searchEt.getText().toString().trim();
//                判断输入内容是否为空，如果为空，就提示不能搜索
                if (TextUtils.isEmpty(msg)) {
                    Toast.makeText(this,"输入内容不能为空！",Toast.LENGTH_SHORT).show();
                    return;
                }
                //开始搜索
                List<AccountBean> list = DBManager.getAccountListByRemarkFromAccounttb(msg);
                mDatas.clear();
                mDatas.addAll(list);
                adapter.notifyDataSetChanged();
                break;
        }
    }
}