Php 如何在Android中向SearchView发送字符串值

我的代码有点问题。我有一个SearchView，它允许用户使用PHP和JSON从SQL数据库中搜索输入的值，以便在RecyclerView中查看结果。在basic中，我使用Volley将我的Android应用程序连接到web服务器

这里的问题是，我的搜索布局上有一个按钮，按下该按钮时，弹出一个日历，要求用户选择日期。当用户选择日期时，所选日期将显示在文本视图中。但是，我希望在SearchView中显示日期

以下是我的搜索类代码：

import android.app.DatePickerDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.app.SearchManager;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.SearchView;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.TextView;
import android.widget.Toast;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    // CONNECTION_TIMEOUT and READ_TIMEOUT are in milliseconds
    public static final int CONNECTION_TIMEOUT = 10000;
    public static final int READ_TIMEOUT = 15000;
    private RecyclerView mRVFish;
    private AdapterFish mAdapter;


    private TextView tvDisplayDate;
    //private DatePicker dpResult;
    private Button btnChangeDate;

    private int year;
    private int month;
    private int day;
    static final int DATE_DIALOG_ID = 999;

    SearchView searchView = null;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        setCurrentDateOnView();
        addListenerOnButton();

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        // adds item to action bar
        getMenuInflater().inflate(R.menu.search_main, menu);

        // Get Search item from action bar and Get Search service
        MenuItem searchItem = menu.findItem(R.id.action_search);
        SearchManager searchManager = (SearchManager) 
    MainActivity.this.getSystemService(Context.SEARCH_SERVICE);
        if (searchItem != null) {
            searchView = (SearchView) searchItem.getActionView();
        }
        if (searchView != null) {


searchView.setSearchableInfo(searchManager.getSearchableInfo(MainActivity.this.getComponentName()));
                searchView.setIconified(false);
        }

        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        return super.onOptionsItemSelected(item);
    }

    // Every time when you press search button on keypad an Activity is 
    recreated which in turn calls this function
    @Override
    protected void onNewIntent(Intent intent) {
        // Get search query and create object of class AsyncFetch
        if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
            String query = intent.getStringExtra(SearchManager.QUERY);
            if (searchView != null) {
                searchView.clearFocus();
            }
            new AsyncFetch(query).execute();

        }
    }

    // Create class AsyncFetch
    private class AsyncFetch extends AsyncTask<String, String, String> {

        ProgressDialog pdLoading = new ProgressDialog(MainActivity.this);
        HttpURLConnection conn;
        URL url = null;
        String searchQuery;

        public AsyncFetch(String searchQuery){
            this.searchQuery=searchQuery;
        }

        @Override
        protected void onPreExecute() {
            super.onPreExecute();

            //this method will be running on UI thread
            pdLoading.setMessage("\tLoading...");
            pdLoading.setCancelable(false);
            pdLoading.show();

        }

        @Override
        protected String doInBackground(String... params) {
            try {

                // Enter URL address where your php file resides
                url = new URL("http://192.168.x.x/test/test-search.php");

            } catch (MalformedURLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
                return e.toString();
            }
            try {

                // Setup HttpURLConnection class to send and receive data 
    from php and mysql
                conn = (HttpURLConnection) url.openConnection();
                conn.setReadTimeout(READ_TIMEOUT);
                conn.setConnectTimeout(CONNECTION_TIMEOUT);
                conn.setRequestMethod("POST");

                // setDoInput and setDoOutput to true as we send and recieve 
    data
                conn.setDoInput(true);
                conn.setDoOutput(true);

                // add parameter to our above url
                Uri.Builder builder = new 
    Uri.Builder().appendQueryParameter("searchQuery", searchQuery);
                String query = builder.build().getEncodedQuery();

                OutputStream os = conn.getOutputStream();
                BufferedWriter writer = new BufferedWriter(new 
    OutputStreamWriter(os, "UTF-8"));
                writer.write(query);
                writer.flush();
                writer.close();
                os.close();
                conn.connect();

            } catch (IOException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
                return e1.toString();
            }

            try {

                int response_code = conn.getResponseCode();

                // Check if successful connection made
                if (response_code == HttpURLConnection.HTTP_OK) {

                    // Read data sent from server
                    InputStream input = conn.getInputStream();
                    BufferedReader reader = new BufferedReader(new 
    InputStreamReader(input));
                    StringBuilder result = new StringBuilder();
                    String line;

                    while ((line = reader.readLine()) != null) {
                        result.append(line);
                    }

                    // Pass data to onPostExecute method
                    return (result.toString());

                } else {
                    return("Connection error");
                }

            } catch (IOException e) {
                e.printStackTrace();
                return e.toString();
            } finally {
                conn.disconnect();
            }


        }

        @Override
        protected void onPostExecute(String result) {

            //this method will be running on UI thread
            pdLoading.dismiss();
            List<DataFish> data=new ArrayList<>();

            pdLoading.dismiss();
            if(result.equals("no rows")) {
                Toast.makeText(MainActivity.this, "No Results found for 
    entered query", Toast.LENGTH_LONG).show();
            }else{

                try {

                    JSONArray jArray = new JSONArray(result);

                    // Extract data from json and store into ArrayList as 
    class objects
                    for (int i = 0; i < jArray.length(); i++) {
                        JSONObject json_data = jArray.getJSONObject(i);
                        DataFish fishData = new DataFish();
                        fishData.datecodes = 
    json_data.getString("datecode");
                        fishData.names = json_data.getString("name");
                        fishData.emails = json_data.getString("email");
                        fishData.timecodes = json_data.getInt("timecode");
                        fishData.numbers = json_data.getInt("numbers");
                        data.add(fishData);
                    }

                    // Setup and Handover data to recyclerview
                    mRVFish = (RecyclerView) 
    findViewById(R.id.fishPriceList);
                    mAdapter = new AdapterFish(MainActivity.this, data);
                    mRVFish.setAdapter(mAdapter);
                    mRVFish.setLayoutManager(new 
    LinearLayoutManager(MainActivity.this));

                } catch (JSONException e) {
                    // You to understand what actually error is and handle 
    it appropriately
                    Toast.makeText(MainActivity.this, e.toString(), 
    Toast.LENGTH_LONG).show();
                    Toast.makeText(MainActivity.this, result.toString(), 
    Toast.LENGTH_LONG).show();
                }

            }

        }

    }




    // display current date
    public void setCurrentDateOnView() {

        //getMenuInflater().inflate(R.menu.search_main, null);

        tvDisplayDate = (TextView) findViewById(R.id.tvDate);
        //dpResult = (DatePicker) findViewById(R.id.dpResult);

        final Calendar c = Calendar.getInstance();
        year = c.get(Calendar.YEAR);
        month = c.get(Calendar.MONTH);
        day = c.get(Calendar.DAY_OF_MONTH);

        // set current date into textview
        tvDisplayDate.setText(new StringBuilder()
                // Month is 0 based, just add 1, if you want to
                .append(year).append("")
                .append(month<10?("0"+month):(month)).append("")
                .append(day<10?("0"+day):(day)).append(""));

        // set current date into datepicker
        //dpResult.init(year, month, day, null);

    }

    public void addListenerOnButton() {

        btnChangeDate = (Button) findViewById(R.id.btnChangeDate);

        btnChangeDate.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

                showDialog(DATE_DIALOG_ID);

            }

        });

    }

    @Override
    protected Dialog onCreateDialog(int id) {
        switch (id) {
            case DATE_DIALOG_ID:
                // set date picker as current date
                return new DatePickerDialog(this, datePickerListener,
                        year, month,day);
        }
        return null;
    }

    private DatePickerDialog.OnDateSetListener datePickerListener
            = new DatePickerDialog.OnDateSetListener() {

        // when dialog box is closed, below method will be called.
        public void onDateSet(DatePicker view, int selectedYear,
                              int selectedMonth, int selectedDay) {
            year = selectedYear;
            month = selectedMonth;
            day = selectedDay;

            // set selected date into textview
            tvDisplayDate.setText(new 
    StringBuilder().append(year).append("")
                    .append(month<10?("0"+month):(month)).append("")
                    .append(day<10?("0"+day):(day)).append(""));

            // set selected date into datepicker also
            //dpResult.init(year, month, day, null);

        }
    };
}

导入android.app.DatePickerDialog；
导入android.app.Dialog；
导入android.app.ProgressDialog；
导入android.app.SearchManager；
导入android.content.Context；
导入android.content.Intent；
导入android.net.Uri；
导入android.os.AsyncTask；
导入android.support.v7.app.AppActivity；
导入android.os.Bundle；
导入android.support.v7.widget.LinearLayoutManager；
导入android.support.v7.widget.RecyclerView；
导入android.support.v7.widget.SearchView；
导入android.view.Menu；
导入android.view.MenuItem；
导入android.view.view；
导入android.widget.Button；
导入android.widget.DatePicker；
导入android.widget.TextView；
导入android.widget.Toast；
导入org.json.JSONArray；
导入org.json.JSONException；
导入org.json.JSONObject；
导入java.io.BufferedReader；
导入java.io.BufferedWriter；
导入java.io.IOException；
导入java.io.InputStream；
导入java.io.InputStreamReader；
导入java.io.OutputStream；
导入java.io.OutputStreamWriter；
导入java.net.HttpURLConnection；
导入java.net.MalformedURLException；
导入java.net.URL；
导入java.util.ArrayList；
导入java.util.Calendar；
导入java.util.List；
公共类MainActivity扩展了AppCompatActivity{
//连接超时和读取超时以毫秒为单位
公共静态最终int连接\u超时=10000；
公共静态最终整型读取超时=15000；
私人回收站查看mRVFish；
私人适应鱼；
私有文本视图tvDisplayDate；
//私有日期选择器dpResult；
私人按钮btnChangeDate；
私人国际年；
私人整数月；
私人国际日；
静态最终整数日期对话框ID=999；
SearchView SearchView=null；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_main）；
setCurrentDateOnView（）；
addListenerOnButton（）；
}
@凌驾
公共布尔onCreateOptions菜单（菜单）{
//将项目添加到操作栏
getMenuInflater（）.充气（R.menu.search\u主菜单）；
//从操作栏获取搜索项并获取搜索服务
MenuItem searchItem=menu.findItem（R.id.action\u search）；
SearchManager SearchManager=（SearchManager）
MainActivity.this.getSystemService（Context.SEARCH\u服务）；
if（searchItem！=null）{
searchView=（searchView）searchItem.getActionView（）；
}
if（searchView！=null）{
searchView.setSearchableInfo（searchManager.getSearchableInfo（MainActivity.this.getComponentName（））；
searchView.setIconified（false）；
}
返回true；
}
@凌驾
公共布尔值onOptionsItemSelected（菜单项项）{
返回super.onOptionsItemSelected（项目）；
}
//每次按下键盘上的搜索按钮时，都会显示一个活动
重新创建，然后调用此函数
@凌驾
受保护的void onNewIntent（意图）{
//获取搜索查询并创建AsyncFetch类的对象
if（Intent.ACTION_SEARCH.equals（Intent.getAction（）））{
String query=intent.getStringExtra（SearchManager.query）；
if（searchView！=null）{
searchView.clearFocus（）；
}
新建AsyncFetch（query.execute（）；
}
}
//创建类异步获取
私有类AsyncFetch扩展了AsyncTask{
ProgressDialog pdLoading=新建ProgressDialog（MainActivity.this）；
httpurl连接连接；
URL=null；
字符串查询；
公共异步获取（字符串搜索查询）{
this.searchQuery=searchQuery；
}
@凌驾
受保护的void onPreExecute（）{
super.onPreExecute（）；
//此方法将在UI线程上运行
pdLoading.setMessage（“\t加载…”）；
pdLoading.setCancelable（假）；
pdLoading.show（）；
}
@凌驾
受保护的字符串doInBackground（字符串…参数）{
试一试{
//输入php文件所在的URL地址
url=新url（“http://192.168.x.x/test/test-search.php");
}捕获（格式错误）{
//TODO自动生成的捕捉块
e、 printStackTrace（）；
返回e.toString（）；
}
试一试{
//设置HttpURLConnection类以发送和接收数据
来自php和mysql
conn=（HttpURLConnection）url.openConnection（）；
conn.setReadTimeout（读取超时）；
连接设置连接超时（连接超时）；
conn.setRequestMethod（“POST”）；
//发送和接收时，将setDoInput和setDoOutput设置为true
数据
conn.setDoInput（真）；
连接设置输出（真）；
//将参数添加到我们上面的url
Uri.Builder=new
Uri.Builder（）.appendQueryParameter（“searchQuery”，searchQuery）；
字符串查询=builder.build（）.getEncodedQuery（）；
OutputStream os=conn.getOutputStream（）；
BufferedWriter=新的BufferedWriter（新的
OutputStreamWriter（操作系统，“UTF-8”）；
writer.write（查询）；
作家，同花顺
<?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">
    <android.support.v7.widget.RecyclerView
        android:id="@+id/fishPriceList"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:paddingTop="10dp"
        android:layout_weight="1"
        />

    <TextView
        android:id="@+id/tvDate"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAlignment="viewStart"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textColor="?attr/editTextColor" />

    <Button
        android:id="@+id/btnChangeDate"
        android:layout_width="175dp"
        android:layout_height="wrap_content"
        android:background="@color/bg_login"
        android:text="Change Date"
        android:textColor="@color/white" />

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:clickable="true"
    android:orientation="horizontal"
    android:padding="10dp">

    <TextView
        android:id="@+id/textFishName"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="5dp"
        android:text="Date"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <TextView
        android:id="@+id/textPrice"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_marginLeft="5dp"
        android:layout_marginRight="5dp"
        android:text="Number"
        android:textAppearance="?android:attr/textAppearanceSmall"
        android:textColor="@color/colorAccent" />

    <TextView
        android:id="@+id/textSize"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/textFishName"
        android:layout_marginLeft="5dp"
        android:text="Name"
        android:textAppearance="?android:attr/textAppearanceSmall"
        android:textColor="#666" />

    <TextView
        android:id="@+id/TimeCode"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="5dp"
        android:text="Time Code"
        android:textAppearance="?android:attr/textAppearanceSmall"
        android:textColor="#666"
        android:textSize="18sp"
        android:layout_below="@+id/textType"
        android:layout_alignParentStart="true" />

    <TextView
        android:id="@+id/textType"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/textSize"
        android:layout_marginLeft="5dp"
        android:text="Email"
        android:textAppearance="?android:attr/textAppearanceSmall"
        android:textColor="#666" />

</RelativeLayout>

<menu 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" tools:context=".SearchResultsActivity">

    <item
        android:id="@+id/action_search"
        android:icon="@android:drawable/ic_menu_search"
        app:showAsAction="always"
        app:actionViewClass="android.support.v7.widget.SearchView"
        android:title="Search"/>

</menu>