如何从 PHP 获取数据到 Android？
你能帮我吗？，如何将 PHP 的结果显示到 android textview 这是我的 PHP 代码，我应该在这个上使用 JSON...
<? php
mysql_connect("localhost","root","");
mysql_select_db("mydatabase");
$query = "SELECT SUM(OrderPrice) as total FROM tbl_user";
$result = mysql_query($query);
while($row = mysql_fetch_assoc($result))
{
$new_arr[] = $row['total'];
}
echo json_encode($new_arr);
?>
您好，您可以使用以下链接：
假设这是您的 php 文件 db.php，其中数据库“交易”和表“城市”具有字段 CITY_ID 和 CITY_NAME
<?php
$con = mysql_connect('localhost', 'root', '');
if (!$con)
{
die("could not connect: " + mysql_error());
}
mysql_select_db("deal", $con);
$result=mysql_query("SELECT * FROM city ", $con);
while ($row = mysql_fetch_assoc($result))
{
$output[]=$row;
}
print(json_encode($output));
mysql_close($con);
?>
问题是您是否会直接在您的设备上读取 php 或从您的网络服务器请求它。你可以做第一个，但你必须在你的设备上安装一个网络服务器，也许是 apache，cos“localhost 和 127.0.0.1”可能在没有网络服务器的情况下工作，你可以使用以下类或库从中获取数据，它可能是 dam ！第二个很简单，把你的 php 放在你的服务器上，客户端应用程序通过 http/https 等调用它：
简单连接：
public static class Connector extends AsyncTask<String, Object, Object> {
private static final int DEFAULT_CNN_TIME_OUT = 1000 * 20;
private static String USER_AGENT;
private static final int[] LOCK = new int[1];
private String mUrl;
private byte[] mBody;
public Connector( Context _cxt ) {
super();
if( TextUtils.isEmpty( USER_AGENT ) ) {
// Without this, the default provided by API will be like "Dalvik/1.6.0 (Linux; U; Android 4.0.4; BASE_Lutea_3 Build/IMM76D)" .
USER_AGENT = new WebView( _cxt ).getSettings().getUserAgentString();
}
}
/*
* Convenient function to execute the connecting task.
*/
public void submit( String _url ) {
this.execute( _url );
}
@Override
protected Object doInBackground( String... _params ) {
mUrl = _params[0];
Object ret = null;
HttpURLConnection conn = null;
try {
synchronized( LOCK ) {
InputStream in = null;
conn = connect( mUrl );
// if we don't do conn.setRequestProperty( "Accept-Encoding", "gzip" ), the wrapper GZIPInputStream can be removed.
onConnectorInputStream( in = new GZIPInputStream( conn.getInputStream() ) );
in.close();
in = null;
}
}
catch( Exception _e ) {
ret = _e;
}
finally {
if( conn != null ) {
conn.disconnect();
conn = null;
}
}
return ret;
}
@Override
protected void onPostExecute( Object _result ) {
if( _result instanceof SocketTimeoutException ) {
onConnectorConnectTimout();
} else if( _result instanceof ConnectorPostConnectException ) {
onConnectorError( ((ConnectorPostConnectException) _result).getStatus() );
} else if( _result instanceof Exception ) {
onConnectorInvalidConnect( (Exception) _result );
} else if( _result == null ) {
onConnectorFinished();
}
handleEstablishedConnection();
}
/*
* Internal help and test function.
*/
private static void handleEstablishedConnection() {
try {
Log.v( TAG, "Connection is established." );
CookieStore cs = CookieManager.getInstance().getCookieStore();
if( cs != null ) {
Log.v( TAG, "------------cookies------------" );
List<Cookie> list = cs.getCookies();
if( list != null && list.size() > 0 ) {
StringBuilder cookieBuilder = new StringBuilder();
for( Cookie c : list ) {
cookieBuilder
.append( c.getName().trim() )
.append( "=>" )
.append( c.getValue().trim() )
.append( "=>" )
.append( c.getDomain() );
Log.v( TAG, cookieBuilder.toString() );
cookieBuilder.delete( 0, cookieBuilder.length() - 1 );
}
cookieBuilder = null;
} else {
Log.v( TAG, "Empty cookies." );
}
cs = null;
list = null;
}
}
catch( Exception _e ) {
Log.e( TAG, "Error in handleEstablishedConnection: " + _e.getMessage() );
}
finally {
}
}
private HttpURLConnection connect( String _urlStr ) throws Exception {
URL url = null;
HttpURLConnection conn = null;
try {
try {
url = new URL( _urlStr );
}
catch( MalformedURLException e ) {
throw new IllegalArgumentException( "Invalid url: " + _urlStr );
}
conn = preConnect( url );
doConnect( conn );
conn = postConnect( conn );
}
catch( Exception _e ) {
throw _e;
}
finally {
url = null;
}
return conn;
}
private HttpURLConnection preConnect( URL url ) throws Exception {
HttpURLConnection conn;
conn = (HttpURLConnection) url.openConnection();
conn.setUseCaches( false );
// http://www.aswinanand.com/2009/01/httpurlconnectionsetfollowredirects-bug/comment-page-1/#comment-13330
// see the url to learn more about the problem of redirect
conn.setInstanceFollowRedirects( false );
conn.setDoOutput( true );// allows body
mBody = getBody();
if( hasBody() ) {
conn.setFixedLengthStreamingMode( mBody.length );
}
conn.setRequestMethod( "POST" );
conn.setRequestProperty( "Connection", "Keep-Alive" );
conn.setRequestProperty( "Content-Type", "application/x-www-form-urlencoded;charset=UTF-8" );
conn.setRequestProperty( "User-Agent", USER_AGENT );
conn.setRequestProperty( "Accept-Encoding", "gzip" );// force server to send in Content-Encoding: gzip .
String cookies = onCookie();
if( !TextUtils.isEmpty( cookies ) ) {
conn.setRequestProperty( "Cookie", onCookie() );
cookies = null;
}
conn.setConnectTimeout( onSetConnectTimeout() );
return conn;
}
/*
* Convenient function to check the exiting of body.
*/
private boolean hasBody() {
return mBody != null && mBody.length > 0;
}
private void doConnect( HttpURLConnection conn ) throws Exception {
OutputStream out; // the outgoing stream
out = conn.getOutputStream();
if( hasBody() ) {
out.write( mBody );
}
out.close();
out = null;
}
private HttpURLConnection postConnect( HttpURLConnection conn ) throws Exception {
int status = conn.getResponseCode();
if( status != HttpURLConnection.HTTP_OK ) {
throw new ConnectorPostConnectException( status );
} else {
CookieManager.getInstance().put( conn.getURL().toURI(), conn.getHeaderFields() );
return conn;
}
}
private byte[] getBody() {
byte[] body = null;
String bodyString = onSetBody();
if( !TextUtils.isEmpty( bodyString ) ) {
body = bodyString.getBytes();
}
return body;
}
// ------------------------------------------------
// Overrides methods here
// ------------------------------------------------
protected int onSetConnectTimeout() {
return DEFAULT_CNN_TIME_OUT;
}
protected String onCookie() {
return null;
}
protected String onSetBody() {
return null;
}
protected void onConnectorConnectTimout() {
Log.e( TAG, "Handling connector timeout gracefully." );
}
protected void onConnectorError( int _status ) {
Log.e( TAG, "Handling connector error(responsed) gracefully: " + _status );
}
protected void onConnectorInvalidConnect( Exception _e ) {
Log.e( TAG, "Handling connector invalid connect(crash) gracefully: " + _e.toString() );
}
/*
* Read data here. The function runs in thread. To hook on UI thread use onConnectorFinished()
*/
protected void onConnectorInputStream( InputStream _in ) {
}
/*
* Last handler for a success connection
*/
protected void onConnectorFinished() {
}
}
使用 Volley 获得响应：https ://github.com/ogrebgr/android_volley_examples/blob/master/src/com/github/volley_examples/Act_SimpleRequest.java
使用 jsoup 获取“原始 html”：http: //jsoup.org/
恐怕我无法发表评论，但本教程一定会对您有所帮助。简而言之，您使用HttpUrlConnection读取 JSON 的页面，然后使用org.json.JSONObject 对其进行解析。
http://ihofmann.wordpress.com/2012/08/09/restful-web-services-with-json-in-android/