Question

这是我的Json编码代码我想要的是我想在Android中显示图像和标题但我无法显示图像 < / strong>

{"lists": [{"post_title":"kigs", "post_img":"post_img":"http://truzzinfotech.com/wp-content/uploads/2014/04/19-150x150.jpg"}, {"post_title":"Lacolline", "post_img":"http://truzzinfotech.com/wp-content/uploads/2014/04/19-150x150.jpg"}, {"post_title":"Cricket", "post_img":"http://truzzinfotech.com/wp-content/uploads/2014/047-150x150.jpg"}, ], "success":1}

这是我获取图像和标题的安卓代码

public class Portfolio扩展了ListActivity {

// Progress Dialog private ProgressDialog pDialog; ImageView image; // Creating JSON Parser object JSONParser jParser = new JSONParser(); ArrayList<HashMap<String, String>> portfoliosList; // url to get all products list private static String url_all_portfolios = "http://truzzinfotech.com/wp-content/themes/truzz/getPortfolio.php"; // JSON Node names private static final String TAG_SUCCESS = "success"; private static final String TAG_PORTFOLIOS = "lists"; static final String TAG_TITLE = "post_title"; static final String TAG_IMAGE = "post_img"; // products JSONArray JSONArray lists = null; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.portfolio); //ListView lv = getListView(); // Hashmap for ListView portfoliosList = new ArrayList<HashMap<String, String>>(); // Loading products in Background Thread new LoadAllPortfolios().execute(); image = (ImageView)findViewById(R.id.portImg); } /** * Background Sync Task to Load all product by making HTTP Request * */ class LoadAllPortfolios extends AsyncTask<String, String, String> { /** * Before starting background thread Show Progress Dialog * */ @Override protected void onPreExecute() { super.onPreExecute(); pDialog = new ProgressDialog(Portfolio.this); pDialog.setMessage("Loading portfolio. Please wait..."); pDialog.setIndeterminate(false); pDialog.setCancelable(false); pDialog.show(); //Toast.makeText(getBaseContext(), "Enter in loading" ,Toast.LENGTH_LONG).show(); } /** * getting All products from url * */ protected String doInBackground(String... args) { // Building Parameters //Toast.makeText(getBaseContext(), "Enter in doInBackground" ,Toast.LENGTH_LONG).show(); List<NameValuePair> params = new ArrayList<NameValuePair>(); // getting JSON string from URL JSONObject json = jParser.makeHttpRequest(url_all_portfolios,"GET", params); Log.d("All Products: ", json.toString()); try { //lists = new JSONArray(TAG_PORTFOLIOS); int success = json.getInt(TAG_SUCCESS); if (success == 1) { // portfolios found // Getting Array of portfolios lists = json.getJSONArray(TAG_PORTFOLIOS); // c = null; // looping through All Products for (int i = 0; i < lists.length(); i++) { JSONObject c = lists.getJSONObject(i); String title = c.getString(TAG_TITLE); String image = c.getString(TAG_IMAGE); Log.d("Item name: ",title); HashMap<String, String> map = new HashMap<String, String>(); URL url = new URL(image); HttpURLConnection con = (HttpURLConnection) url.openConnection(); con.setDoInput(true); con.connect(); InputStream input = con.getInputStream(); Bitmap bitmap = BitmapFactory.decodeStream(input); //InputStream in = new URL(TAG_IMAGE).openStream(); //bmp = BitmapFactory.decodeStream(in); map.put(TAG_TITLE, title); map.put(TAG_IMAGE, image); //map.put("image", jsonobject.getString("image")); portfoliosList.add(map); } } else { // no products found // Launch Add New product Activity Toast.makeText(getBaseContext(), "No Portfolio Found" ,Toast.LENGTH_LONG).show(); } } catch (JSONException e) { // TODO Auto-generated catch block Toast.makeText(getBaseContext(), "No Data Found" ,Toast.LENGTH_LONG).show(); e.printStackTrace(); } catch (MalformedURLException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } return null; } /** * After completing background task Dismiss the progress dialog * **/ protected void onPostExecute(String file_url) { // dismiss the dialog after getting all products pDialog.dismiss(); // updating UI from Background Thread runOnUiThread(new Runnable() { public void run() { /** * Updating parsed JSON data into ListView * */ ListAdapter adapter = new SimpleAdapter( Portfolio.this, portfoliosList, R.layout.list_item, new String[] { TAG_TITLE,TAG_IMAGE }, new int[] {R.id.name, R.id.portImg}); // updating listview setListAdapter(adapter); } }); } } }

Answer 1

你可以通过谷歌使用排球库来完成网络中必须处理的大部分脏东西

com.android.volley.toolbox.NetworkImageView
        android:id="@+id/networkImageView"
        android:layout_width="150dp"
        android:layout_height="170dp"
        android:layout_centerHorizontal="true" />

NetworkImageView如果您的图像视图是列表视图的一部分，它可以很好地管理它

ImageLoader mImageLoader;
NetworkImageView mNetworkImageView;
private static final String IMAGE_URL =
    "http://developer.android.com/images/training/system-ui.png";
...

// Get the NetworkImageView that will display the image.
mNetworkImageView = (NetworkImageView) findViewById(R.id.networkImageView);

// Get the ImageLoader through your singleton class.
// mImagaLoader is actually the request Queue of the manages all the caching 
// and requesting image from the network in not present in cache
mImageLoader = MySingleton.getInstance(this).getImageLoader();

// Set the URL of the image that should be loaded into this view, and
// specify the ImageLoader that will be used to make the request.
mNetworkImageView.setImageUrl(IMAGE_URL, mImageLoader);

参考： https://developer.android.com/training/volley/request.html

mImageLoader参考：https://developer.android.com/training/volley/requestqueue.html#singleton 如何设置单例类以及为什么

Answer 2

尝试这样，

JSONArray data = yourjson.getJSONArray("lists");

ArrayList<String> imgurls = new ArrayList<String>();

for(int i = 0; i < data.length(); i++){
   imgUrls.add(data.getJSONObject(i).getString("post_img"))
}

用于在imageview visit here

中显示图片

如何在HashMap中将url转换为图像？

2 个答案: