Obtenir des images à partir de PHP serveur pour Android

C'est le code pour obtenir l'image unique et affiché dans l'affichage de l'image.

public class Database_demo extends Activity {
public static final int DIALOG_DOWNLOAD_JSON_PROGRESS = 0;
int[] flags;
String strImageName;
int n = 10000;
String[] mySecondStringArray = new String[n];
String[] strArray;
HashMap<String, String> hm;
List<HashMap<String, String>> aList;
InputStream is = null;
String result = "";
JSONObject jArray = null;
private String Qrimage;
private Bitmap bmp;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.news);
try {
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(
"http://192.168.1.50/XXXX/getimage.php");
HttpResponse response = httpClient.execute(httpPost);
HttpEntity entity = response.getEntity();
is = entity.getContent();
} catch (Exception e) {
}
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");
}
is.close();
result = sb.toString();
jArray = new JSONObject(result);
JSONArray json = jArray.getJSONArray("tablename");
for (int i = 0; i < json.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
JSONObject e = json.getJSONObject(i);
Qrimage = e.getString("imagefieldname");
System.out.println(Qrimage);
byte[] qrimage = Base64.decode(Qrimage.getBytes(), i);
System.out.println(qrimage);
bmp = BitmapFactory.decodeByteArray(qrimage, 0, qrimage.length);
ImageView imageview = (ImageView) findViewById(R.id.flag);
imageview.setImageBitmap(bmp);
}
} catch (Exception e) {
//TODO: handle exception
}
}
}

Fichier Php

<?php
$host="localhost"; //replace with database hostname 
$username="root"; //replace with database username 
$password=""; //replace with database password 
$db_name="databasename"; //replace with database name
$con=mysql_connect("$host", "$username", "$password")or die("cannot connect"); 
mysql_select_db("$db_name")or die("cannot select DB");
$sql = "SELECT * FROM tablename"; 
$result1 = mysql_query($sql);
$json = array();
if(mysql_num_rows($result1)){
while($row=mysql_fetch_assoc($result1)){
$json['tablename'][]=$row;
}
}
mysql_close($con);
echo json_encode($json); 
?> 

OriginalL'auteur karthik

J'ai utilisé un InputStream et OutputStream, tout comme vous de télécharger des fichiers avec Java. J'ai d'abord obtenir le nom de fichier (sur le serveur) à partir de PHP/JSON script. Bien sûr cette méthode pourrait être optimisé qu'il efface les anciens fichiers dans le dossier cache.

private static File getImage(String filename) {
String localFilename = new File(filename).getName();
File img = new File("/sdcard/app/tmp/" + localFilename);
//Create directories
new File("/sdcard/app/tmp/").mkdirs();
//only download new images
if (!img.exists()) {
try {
URL imageUrl = new URL("http://example.com/images/" + filename);
InputStream in = imageUrl.openStream();
OutputStream out = new BufferedOutputStream(new FileOutputStream(img));
for (int b; (b = in.read()) != -1;) {
out.write(b);
}
out.close();
in.close();
} catch (MalformedURLException e) {
img = null;
} catch (IOException e) {
img = null;
}
}
return img;
}

OriginalL'auteur Henridv