在java中分离JSON数组中的对象
我有下面的PHP代码，它将每三个条目作为不同的对象添加到数组中在java中分离JSON数组中的对象,java,php,android,arrays,json,Java,Php,Android,Arrays,Json,我有下面的PHP代码，它将每三个条目作为不同的对象添加到数组中 //Read the username and password from ServerRequest class $username = $_POST["username"]; //Select all rows when the username match the input $statement = mysqli_prepare($con, "SELECT * FROM Chore WHERE usern
//Read the username and password from ServerRequest class
$username = $_POST["username"];
//Select all rows when the username match the input
$statement = mysqli_prepare($con, "SELECT * FROM Chore WHERE username = ?");
mysqli_stmt_bind_param($statement, "s", $username);
mysqli_stmt_execute($statement);
//store the results of the previous query and create a variable for each column returned
mysqli_stmt_store_result($statement);
mysqli_stmt_bind_result($statement,$chore_name ,$point_value, $parent_username, $child_username, $created, $points_given);
$chore = array();
//store the previous variables you created in the array (only the ones you want to use)
while(mysqli_stmt_fetch($statement)) {
$t = new stdClass();
$t->chore_name = $chore_name;
$t->child_username = $child_username;
$t->point_value = $point_value;
$chore[] = $t;
}
//encode the array in JSON format
echo json_encode($chore);
//close the statement
mysqli_stmt_close($statement);
//Close the database connection
mysqli_close($con);
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/choreList"
android:textSize="20dp"
android:typeface="sans"
android:layout_centerHorizontal="true"
android:layout_below="@+id/currentChores"
android:paddingBottom="10dp"
android:paddingTop="50dp">
</ListView>
Bundle extras = getIntent().getExtras();
final String user = extras.getString("username");
//The URL is the location of the PHP file to validate a user
String requestURL = SERVER_ADDRESS+"FetchChoreData.php";
URL url;
Chore returnedChore = null;
try {
//Opens the connection to the PHP files
//Sets the conditions of the connection
url = new URL(requestURL);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(CONNECTION_TIMEOUT);
conn.setConnectTimeout(CONNECTION_TIMEOUT);
conn.setRequestMethod("POST");
conn.setDoInput(true);
conn.setDoOutput(true);
//Opens an output stream to send the data to be verified
// and then closes the all output streams and flushes the output writer
OutputStream os = conn.getOutputStream();
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
Uri.Builder builder = new Uri.Builder()
.appendQueryParameter("username",user);
String query = builder.build().getEncodedQuery();
writer.write(query);
writer.flush();
writer.close();
os.close();
//saves the response code to ensure connection was succesful
int code = conn.getResponseCode();
Log.d("code", Integer.toString(code));
//Opens an input stream to retrieve verified data back from the server
//Starts a String Builder to read the data off the input
//Closes the BufferedReader once it has finished building the string
InputStream responseStream = new BufferedInputStream(conn.getInputStream());
BufferedReader responseStreamReader = new BufferedReader(new InputStreamReader(responseStream));
String line;
StringBuilder stringBuilder = new StringBuilder();
while ((line = responseStreamReader.readLine()) != null)
stringBuilder.append(line + "/n");
responseStreamReader.close();
String response = stringBuilder.toString();
Log.d("response",response);
JSONObject jsonResponse = new JSONObject(response);
//Creates a JSON object from the string
ArrayList<String> chores = new ArrayList<String>();
for(int i=0; i < chores.length() ; i++) {
JSONObject json_data = jsonResponse.getJSONObject(i);
String chore=json_data.getString("chore_name");
String username=json_data.getString("child_username");
int points=json_data.getInt("point_value");
String currentChore = chore + "\t" + username + "\t" + points;
chores.add(currentChore);
Log.d("Output", currentChore);
ArrayAdapter<String> choreAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_expandable_list_item_1, chores));
setListAdapter(choreAdapter);
ListView listView = (ListView) findViewById(R.id.choreList);
listView.setAdapter(choreAdapter);
}
} catch (Exception e) {
e.printStackTrace();
} catch(JSONException e){
e.printStackTrace();
} catch(IOException e) {
e.printStackTrace();
}
Bundle extras=getIntent（）.getExtras（）；
最终字符串user=extras.getString（“用户名”）；
//URL是用于验证用户的PHP文件的位置
String requestURL=SERVER_ADDRESS+“FetchChoreData.php”；
网址；
Chore returnedChore=null；
试一试{
//打开与PHP文件的连接
//设置连接的条件
url=新url（请求url）；
HttpURLConnection conn=（HttpURLConnection）url.openConnection（）；
conn.setReadTimeout（连接超时）；
连接设置连接超时（连接超时）；
conn.setRequestMethod（“POST”）；
conn.setDoInput（真）；
连接设置输出（真）；
//打开输出流以发送要验证的数据
//然后关闭所有输出流并刷新输出写入程序
OutputStream os=conn.getOutputStream（）；
BufferedWriter writer=新的BufferedWriter（新的OutputStreamWriter（os，“UTF-8”））；
Uri.Builder=新的Uri.Builder（）
.appendQueryParameter（“用户名”，用户）；
字符串查询=builder.build（）.getEncodedQuery（）；
writer.write（查询）；
writer.flush（）；
writer.close（）；
os.close（）；
//保存响应代码以确保连接成功
int code=conn.getResponseCode（）；
Log.d（“code”，Integer.toString（code））；
//打开输入流以从服务器检索已验证的数据
//启动字符串生成器以从输入中读取数据
//完成构建字符串后关闭BufferedReader
InputStream responseStream=新的BufferedInputStream（conn.getInputStream（））；
BufferedReader responseStreamReader=新的BufferedReader（新的InputStreamReader（responseStream））；
弦线；
StringBuilder StringBuilder=新的StringBuilder（）；
而（（line=responseStreamReader.readLine（））！=null）
stringBuilder.append（第+“/n行”）；
responseStreamReader.close（）；
字符串响应=stringBuilder.toString（）；
Log.d（“响应”，响应）；
JSONObject jsonResponse=新的JSONObject（响应）；
//从字符串创建JSON对象
ArrayList琐事=新建ArrayList（）；
for（int i=0；i