我开发了一个用于库的Android应用程序。我在搜索和检索基于书名或作者名称的书籍方面存在问题。表格已经创建但表格值未显示。并且在模拟器中显示＆＃34 ;记录不可用＆＃34;。我在logcat中得到任何错误，我得到了连接成功＆＃34;。我的php代码也正确地在localhost中检索数据..有人帮助我..
activity_screen6.xml
<RelativeLayout 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"
android:background="@drawable/index"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.library.Screen6" >
<EditText
android:id="@+id/detail"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginTop="19dp"
android:ems="10"
android:hint="Enter title/Author name"
android:textColor="#ffffffff" />
<Button
android:id="@+id/searchBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/detail"
android:layout_alignParentRight="true"
android:text="Search"
android:textColor="#ffffffff" />
<TextView
android:id="@+id/text1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="@+id/detail"
android:layout_marginTop="54dp"
android:textColor="#ffffffff" />
<TableLayout
android:id="@+id/table"
android:layout_width="344dp"
android:layout_height="fill_parent"
android:focusable="true"
android:layout_below="@+id/detail"
android:focusableInTouchMode="true" >
</TableLayout>
</RelativeLayout>
Screen6.java
package com.example.library;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.Activity;
import android.app.ProgressDialog;
import android.graphics.Color;
import android.os.Bundle;
import android.os.StrictMode;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TableLayout;
import android.widget.TableRow;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.TableRow.LayoutParams;
public class Screen6 extends Activity
{
ProgressDialog dialog = null;
Button button;
//List<NameValuePair> nameValuePairs;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
setContentView(R.layout.activity_screen6);
button = (Button) findViewById(R.id.searchBtn);
final EditText f=(EditText)findViewById(R.id.detail);
button.setOnClickListener(new View.OnClickListener()
{
public void onClick(View view)
{
//dialog = ProgressDialog.show(Screen6.this, "",
// "Searching...", true);
String result = null;
InputStream is = null;
try{
HttpClient httpclient = new DefaultHttpClient();
HttpPost httppost = new HttpPost("http://10.0.2.2:80/log/bksearch.php?&detail=detail");
// nameValuePairs = new ArrayList<NameValuePair>(1);
//nameValuePairs.add(new BasicNameValuePair("detail",f.getText().toString().trim()));
//httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
//Execute HTTP Post Request
HttpResponse response = httpclient.execute(httppost);
HttpEntity entity = response.getEntity();
// response=httpclient.execute(httppost);
is = entity.getContent();
Log.e("log_tag", "connection success ");
Toast.makeText(getApplicationContext(), "pass", Toast.LENGTH_SHORT).show();
}
catch(Exception e)
{
Log.e("log_tag", "Error in http connection " +e.toString());
Toast.makeText(getApplicationContext(), "Connection fail", Toast.LENGTH_SHORT).show();
}
//convert response to string
try
{
BufferedReader reader = new BufferedReader(new InputStreamReader(is,"iso-8859-1"),8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null)
{
sb.append(line + "\n");
// Toast.makeText(getApplicationContext(), "Input Reading pass", Toast.LENGTH_SHORT).show();
}
is.close();
result=sb.toString();
Toast.makeText(getApplicationContext(), result, Toast.LENGTH_SHORT).show();
}
catch(Exception e)
{
Log.e("log_tag", "Error converting result "+e.toString());
Toast.makeText(getApplicationContext(), " Input reading fail", Toast.LENGTH_SHORT).show();
}
//parse json data
try
{
JSONArray jArray = new JSONArray(result);
String re=jArray.getString(jArray.length()-1);
TableLayout tv=(TableLayout) findViewById(R.id.table);
tv.removeAllViewsInLayout();
int flag=1;
for(int i=-1;i<jArray.length()-1;i++)
{
TableRow tr=new TableRow(Screen6.this);
tr.setLayoutParams(new LayoutParams(
LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
if(flag==1)
{
TextView b6=new TextView(Screen6.this);
b6.setText("S.NO");
b6.setTextColor(Color.WHITE);
b6.setTextSize(15);
tr.addView(b6);
TextView b19=new TextView(Screen6.this);
b19.setPadding(10, 0, 0, 0);
b19.setTextSize(15);
b19.setText("ACC NO");
b19.setTextColor(Color.WHITE);
tr.addView(b19);
TextView b39=new TextView(Screen6.this);
b39.setText("AUTHOR");
b39.setTextColor(Color.WHITE);
b39.setTextSize(15);
tr.addView(b39);
TextView b29=new TextView(Screen6.this);
b29.setPadding(10, 0, 0, 0);
b29.setText("TITLE");
b29.setTextColor(Color.WHITE);
b29.setTextSize(15);
tr.addView(b29);
TextView b59=new TextView(Screen6.this);
b59.setText("EDITION");
b59.setTextColor(Color.WHITE);
b59.setTextSize(15);
tr.addView(b59);
TextView b79=new TextView(Screen6.this);
b79.setText("YEAR");
b79.setTextColor(Color.WHITE);
b79.setTextSize(15);
tr.addView(b79);
TextView b49=new TextView(Screen6.this);
b49.setText("PUBLISHER");
b49.setTextColor(Color.WHITE);
b49.setTextSize(15);
tr.addView(b49);
TextView b69=new TextView(Screen6.this);
b69.setText("RS");
b69.setTextColor(Color.WHITE);
b69.setTextSize(15);
tr.addView(b69);
TextView b89=new TextView(Screen6.this);
b89.setText("ISBN");
b89.setTextColor(Color.WHITE);
b89.setTextSize(15);
tr.addView(b89);
tv.addView(tr);
final View vline = new View(Screen6.this);
vline.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.FILL_PARENT, 8));
vline.setBackgroundColor(Color.WHITE);
tv.addView(vline);
flag=0;
}
else
{
JSONObject json_data = jArray.getJSONObject(i);
Log.i("log_tag","S.NO: "+json_data.getInt("S.No")+
", ACC NO: "+json_data.getString("Acc No")+
", AUTHOR: "+json_data.getString("Author")
+
", TITLE: "+json_data.getString("Title")
+
", EDITION: "+json_data.getString("Edition")
+
", YEAR: "+json_data.getString("Year")
+
", PUBLISHER: "+json_data.getString("Publisher")
+
", RS: "+json_data.getString("Rs")
+
", ISBN: "+json_data.getString("ISBN"));
TextView b=new TextView(Screen6.this);
String stime=String.valueOf(json_data.getString("S.No"));
b.setText(stime);
b.setTextColor(Color.RED);
b.setTextSize(15);
tr.addView(b);
TextView b1=new TextView(Screen6.this);
b1.setPadding(10, 0, 0, 0);
b1.setTextSize(15);
String stime1=json_data.getString("Acc No");
b1.setText(stime1);
b1.setTextColor(Color.WHITE);
tr.addView(b1);
TextView b2=new TextView(Screen6.this);
b2.setPadding(10, 0, 0, 0);
String stime2=String.valueOf(json_data.getString("Author"));
b2.setText(stime2);
b2.setTextColor(Color.RED);
b2.setTextSize(15);
tr.addView(b2);
TextView b4=new TextView(Screen6.this);
b4.setPadding(10, 0, 0, 0);
b4.setTextSize(15);
String stime4=json_data.getString("Title");
b4.setText(stime4);
b4.setTextColor(Color.WHITE);
tr.addView(b4);
TextView b5=new TextView(Screen6.this);
b5.setPadding(10, 0, 0, 0);
b5.setTextSize(15);
String stime5=json_data.getString("Edition");
b5.setText(stime5);
b5.setTextColor(Color.WHITE);
tr.addView(b5);
TextView b6=new TextView(Screen6.this);
b6.setPadding(10, 0, 0, 0);
b6.setTextSize(15);
String stime6=json_data.getString("Year");
b6.setText(stime6);
b6.setTextColor(Color.WHITE);
tr.addView(b6);
TextView b7=new TextView(Screen6.this);
b7.setPadding(10, 0, 0, 0);
b7.setTextSize(15);
String stime7=json_data.getString("Publisher");
b7.setText(stime7);
b7.setTextColor(Color.WHITE);
tr.addView(b7);
TextView b8=new TextView(Screen6.this);
b8.setPadding(10, 0, 0, 0);
b8.setTextSize(15);
String stime8=json_data.getString("Rs");
b8.setText(stime8);
b8.setTextColor(Color.WHITE);
tr.addView(b8);
TextView b9=new TextView(Screen6.this);
b9.setPadding(10, 0, 0, 0);
b9.setTextSize(15);
String stime9=json_data.getString("ISBN");
b9.setText(stime9);
b9.setTextColor(Color.WHITE);
tr.addView(b9);
tv.addView(tr);
final View vline1 = new View(Screen6.this);
vline1.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.FILL_PARENT, 7));
vline1.setBackgroundColor(Color.WHITE);
tv.addView(vline1);
}
}
}
catch(JSONException e)
{
Log.e("log_tag", "Error parsing data "+e.toString());
Toast.makeText(getApplicationContext(), "JsonArray fail", Toast.LENGTH_SHORT).show();
}
}
});
}
}
bksearch.php
<?php
$con = mysql_connect("localhost","root","");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("mydatabase", $con);
$detail = $_GET['detail'];
$i=mysql_query("select * from books where Title = '".$detail."' OR Author = '".$detail. "'",$con);
$num_rows = mysql_num_rows($i);
$check='';
while($row = mysql_fetch_array($i))
{
$r[]=$row;
$check=$row['S.No'];
}
if($check==NULL)
{
$r[$num_rows]="Record is not available";
echo json_encode($r);
}
else
{
$r[$num_rows]="success";
echo json_encode($r);
}
mysql_close($con);
?>
答案 0 :(得分：0)
这里的sear数字为null。
因此，以编程方式发布f.getText().tostring()值。