我使用带有三张图片的滑块的https://github.com/daimajia/AndroidImageSlider。这是我在AsyncTask尝试加载三张图片来自{ {1}}：
Json Data当然要加载，我们需要在public class AsyncHttpTask extends AsyncTask<String, Void, Integer> {
public ProgressDialog pDialog;
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setIndeterminate(false);
pDialog.setMessage("Loading, Please wait...");
pDialog.setCancelable(true);
pDialog.show();
}
@Override
protected Integer doInBackground(String... params) {
Integer result = 0;
HttpURLConnection urlConnection;
try {
/* forming th java.net.URL object */
URL url = new URL(params[0]);
urlConnection = (HttpURLConnection) url.openConnection();
/* for Get request */
urlConnection.setRequestMethod("GET");
int statusCode = urlConnection.getResponseCode();
/* 200 represents HTTP OK */
if (statusCode == 200) {
BufferedReader r = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
StringBuilder response = new StringBuilder();
String line;
while ((line = r.readLine()) != null) {
response.append(line);
}
parseResult(response.toString());
result = 1;
}else{
result = 0; //"Failed to fetch data!";
}
} catch (Exception e) {
Toast.makeText(MainActivity.this, e.getLocalizedMessage(), Toast.LENGTH_SHORT).show();
}
return result; //"Failed to fetch data!";
}
@Override
protected void onPostExecute(Integer result) {
/* Download complete. Lets update UI */
if (result == 1) {
adapter = new MyRecyclerAdapter(MainActivity.this, feedItemList);
mmRecyclerView.setAdapter(adapter);
pDialog.dismiss();
} else {
Toast.makeText(MainActivity.this, "Failed to fetch data!", Toast.LENGTH_SHORT).show();
}
}
}
上使用它：
Oncreate所以，我的final String url = "http://url/Data.json"; //json data url
new AsyncHttpTask().execute(url); //execute the json data
中有三张图片：
JsonData//我的JsonData正在解决任何问题。但是，
如何在此滑块中显示这三个图像，如上所述"Main-header": [
{
"HeaderImg1": "http://url/Main1.jpg",
"Title": "title 1"
},
{
"HeaderImg2": "http://url/Main2.jpg",
"Title": "title 2"
},
{
"HeaderImg3": "http://url/Main2.jpg",
"Title": "title 3"
}
]
？
编辑：以下是我在Oncreate上完成的操作，这个，工作正常，但我需要从Json数据加载：
JsonData任何帮助感谢。
干杯！
答案 0 :(得分：2)
这就是你应该怎么做的。在Asynctask的onPostExecute方法中使用此代码。
arraylist = new ArrayList<HashMap<String, String>>();
JSONObject jsonResponse;
try {
jsonResponse = new JSONObject(result);
JSONArray jsonMainNode = jsonResponse.optJSONArray("Main-header");
int lengthJsonArr = jsonMainNode.length();
for(int i=0; i < lengthJsonArr; i++)
{
HashMap<String, String> map = new HashMap<String, String>();
JSONObject jsonChildNode = jsonMainNode.getJSONObject(i);
map.put(jsonChildNode.getString("Title"),jsonChildNode.getString("HeaderImg2"));
arraylist.add(map);
for(String name : map.keySet()){
TextSliderView textSliderView = new TextSliderView(MainActivity.this);
textSliderView
.description(name)
.image(map.get(name))
.setScaleType(BaseSliderView.ScaleType.Fit)
.setOnSliderClickListener(MainActivity.this);
textSliderView.bundle(new Bundle());
textSliderView.getBundle()
.putString("extra", name);
mDemoSlider.addSlider(textSliderView);
}
mDemoSlider.setPresetTransformer(SliderLayout.Transformer.Accordion);
mDemoSlider.setPresetIndicator(SliderLayout.PresetIndicators.Center_Bottom);
mDemoSlider.setCustomAnimation(new DescriptionAnimation());
mDemoSlider.setDuration(4000);
mDemoSlider.addOnPageChangeListener(MainActivity.this);
}
} catch (JSONException e) {
e.printStackTrace();
}
}