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我能夠讀取JSON，但現在我只想讀取一些值。我會ID和Android應該給我的用戶名和密碼。或者我會給用戶名和android應該提供給我相應的ID和密碼。 這裏是我的代碼： -從JSON數組中提取數據android
Android:-MainActivity.Java
package com.example.nupur.readjsonexample;
import android.app.ProgressDialog;
import android.content.Intent;
import android.os.AsyncTask;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.text.method.ScrollingMovementMethod;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
public class MainActivity extends ActionBarActivity implements View.OnClickListener {
EditText etcheck;
private TextView textViewJSON;
private Button buttonGet;
// TextView txtCheck;
//private Button buttonParse;
public static final String MY_JSON ="MY_JSON";
private static final String JSON_URL = "http://kezinking.com/SampleConLogin1";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// etcheck=(EditText) findViewById(R.id.etcheck);
// txtCheck=(TextView) findViewById(R.id.txtCheck);
textViewJSON = (TextView) findViewById(R.id.textViewJSON);
textViewJSON.setMovementMethod(new ScrollingMovementMethod());
buttonGet = (Button) findViewById(R.id.buttonGet);
// buttonParse = (Button) findViewById(R.id.buttonParse);
buttonGet.setOnClickListener(this);
// buttonParse.setOnClickListener(this);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
public void onClick(View v) {
if(v==buttonGet){
getJSON(JSON_URL);
}
//if(v==buttonParse){
// showParseActivity();
//}
}
private void showParseActivity() {
Intent intent = new Intent(this, Showdata.class);
intent.putExtra(MY_JSON,textViewJSON.getText().toString());
startActivity(intent);
}
private void getJSON(String url) {
class GetJSON extends AsyncTask<String, Void, String>{
ProgressDialog loading;
@Override
protected void onPreExecute() {
super.onPreExecute();
loading = ProgressDialog.show(MainActivity.this, "Please Wait...",null,true,true);
}
@Override
protected String doInBackground(String... params) {
String uri = params[0];
BufferedReader bufferedReader = null;
try {
URL url = new URL(uri);
HttpURLConnection con = (HttpURLConnection) url.openConnection();
StringBuilder sb = new StringBuilder();
bufferedReader = new BufferedReader(new InputStreamReader(con.getInputStream()));
String json;
while((json = bufferedReader.readLine())!= null){
sb.append(json+"\n");
}
return sb.toString().trim();
}catch(Exception e){
return null;
}
}
@Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
loading.dismiss();
textViewJSON.setText(s);
}
}
GetJSON gj = new GetJSON();
gj.execute(url);
}
}
機器人：-activity_main.xml
<LinearLayout 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:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="@+id/etcheck"/>
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/button_get"
android:id="@+id/buttonGet" />
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:maxLines="20"
android:scrollbars="vertical"
android:id="@+id/textViewJSON" />
<!-- <TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/txtCheck"/> -->
<!--
<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Parse JSON"
android:id="@+id/buttonParse" /> -->
</LinearLayout>
PHP文件級
<?php
$con=mysqli_connect("localhost","amodbina0106","Amodbina200","kezin_king");
if ($con->connect_error) {
die("Connection failed: " . $con->connect_error);
}
?>
<?php
$sql=mysqli_query($con,"SELECT * FROM `Test` WHERE 1");
$result=array();
while($row=mysqli_fetch_assoc($sql))
{
$result[]=$row;
}
echo json_encode(array("result"=>$result));
?>
輸出的PHP： -
{"result":[{"Vendor_ID":"1","username":"nupur","password":"nupur"},{"Vendor_ID":"4","username":"","password":""},{"Vendor_ID":"3","username":"nupur","password":"1234"},{"Vendor_ID":"5","username":"RAJ","password":"RAJ"},{"Vendor_ID":"6","username":"RAJ","password":"RAJ"},{"Vendor_ID":"7","username":"","password":""},{"Vendor_ID":"8","username":"","password":""},{"Vendor_ID":"9","username":"","password":""},{"Vendor_ID":"10","username":"","password":""},{"Vendor_ID":"11","username":"","password":""},{"Vendor_ID":"12","username":"RAM","password":"RAM"},{"Vendor_ID":"13","username":"RAM","password":"RAM"},{"Vendor_ID":"14","username":"RAM","password":"RAM"},{"Vendor_ID":"15","username":"RAM","password":"RAM"},{"Vendor_ID":"16","username":"Nupur","password":"Nupur"},{"Vendor_ID":"17","username":"Nupur","password":"Nupur"},{"Vendor_ID":"18","username":"Nupur","password":"Nupur"},{"Vendor_ID":"19","username":"Nupur","password":"Nupur"},{"Vendor_ID":"20","username":"Rohit","password":"Rohit"},{"Vendor_ID":"21","username":"RAM","password":"RAM"},{"Vendor_ID":"22","username":"","password":""},{"Vendor_ID":"23","username":"","password":""},{"Vendor_ID":"24","username":"RAM","password":"RAM"},{"Vendor_ID":"35","username":"SAGAR","password":"SAGAR"},{"Vendor_ID":"34","username":"SAGAR","password":"SAGAR"},{"Vendor_ID":"33","username":"SAGAR","password":"SAGAR"},{"Vendor_ID":"32","username":"RAM","password":"RAM"},{"Vendor_ID":"31","username":"","password":""},{"Vendor_ID":"36","username":"SAGAR","password":"SAGAR"},{"Vendor_ID":"37","username":"SAGAR","password":"SAGAR"},{"Vendor_ID":"38","username":"SAGAR","password":"SAGAR"},{"Vendor_ID":"39","username":"SAGAR","password":"SAGAR"},{"Vendor_ID":"40","username":"SAGAR","password":"SAGAR"},{"Vendor_ID":"41","username":"SAGAR","password":"SAGAR"},{"Vendor_ID":"73","username":"","password":""},{"Vendor_ID":"43","username":"SAGAR","password":"SAGAR"},{"Vendor_ID":"44","username":"SAGAR","password":"SAGAR"},{"Vendor_ID":"45","username":"SAGAR","password":"SAGAR"},{"Vendor_ID":"46","username":"SAGAR","password":"SAGAR"},{"Vendor_ID":"47","username":"username","password":"password"},{"Vendor_ID":"74","username":"SAGAR","password":"SAGAR"},{"Vendor_ID":"75","username":"SAGAR","password":"SAGAR"},{"Vendor_ID":"72","username":"Krishna","password":"Krishna"},{"Vendor_ID":"68","username":"Honey","password":"Honey"},{"Vendor_ID":"69","username":"Ram","password":"Ram"},{"Vendor_ID":"70","username":"Ram","password":"Ram"},{"Vendor_ID":"71","username":"Ram","password":"Ram"}]}
實施例： - 如果我提供Vendor_ID i n edittext as 1 它應該提供給我用戶名： - nupur 密碼： - 文本視圖中的nupur 。
感謝您的最佳和最簡單的答案..！ –