我试图通过POST方法获取json数组。我无法发送参数。
这是我的班级
public class fbuk extends Activity {
// Log tag
private static final String TAG = MainActivity.class.getSimpleName();
// Movies json url
private static final String url = "http://example.com/s.php";
private ProgressDialog pDialog;
private List<Movie> movieList = new ArrayList<Movie>();
private ListView listView;
private CustomListAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.listview_main);
listView = (ListView) findViewById(R.id.listview);
adapter = new CustomListAdapter(this, movieList);
listView.setAdapter(adapter);
pDialog = new ProgressDialog(this);
// Showing progress dialog before making http request
pDialog.setMessage("Loading...");
pDialog.show();
// changing action bar color
Response.ErrorListener errorListener = new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError errorResponce)
{
VolleyLog.d(TAG, "Error: " + errorResponce.getMessage());
hidePDialog();
}
};
Response.Listener<JSONArray > jsonArrayListener = new Response.Listener<JSONArray>()
{
@Override
public void onResponse(JSONArray response) {
// TODO Auto-generated method stub
hidePDialog();
// Parsing json
for (int i = 0; i < response.length(); i++) {
try {
JSONObject obj = response.getJSONObject(i);
Movie movie = new Movie();
movie.setTitle(obj.getString("ttl"));
movie.setThumbnailUrl(obj.getString("img"));
movie.setRating(obj.getString("stts"));
movie.setYear(obj.getString("rel"));
// Genre is json array
// adding movie to movies array
movieList.add(movie);
} catch (JSONException e) {
e.printStackTrace();
}
}
// notifying list adapter about data changes
// so that it renders the list view with updated data
adapter.notifyDataSetChanged();
}
};
PostJsonArrayRequest req = new PostJsonArrayRequest(Request.Method.POST, url , null, jsonArrayListener, errorListener);
AppController.getInstance().addToRequestQueue(req);
}
@Override
public void onDestroy() {
super.onDestroy();
hidePDialog();
}
private void hidePDialog() {
if (pDialog != null) {
pDialog.dismiss();
pDialog = null;
}
}
public class PostJsonArrayRequest extends JsonArrayRequest {
public PostJsonArrayRequest(int method, String url, String requestBody,
Response.Listener<JSONArray> listener, Response.ErrorListener errorListener) {
super(method, url, requestBody, listener, errorListener);
}
@Override
protected Map<String, String> getParams() throws AuthFailureError {
HashMap<String, String> params = new HashMap<String, String>();
params.put("q", "ram");
return params;
}
@Override
protected Response<JSONArray> parseNetworkResponse(NetworkResponse response) {
try {
String jsonString =
new String(response.data, HttpHeaderParser.parseCharset(response.headers));
return Response.success(new JSONArray(jsonString),
HttpHeaderParser.parseCacheHeaders(response));
} catch (UnsupportedEncodingException e) {
return Response.error(new ParseError(e));
} catch (JSONException je) {
return Response.error(new ParseError(je));
}
}
}
}
请以正确的方式帮助我发送params。经过几次goole搜索和stackoverflow回答这种方式发送POST请求对我有用，但无法发送参数。请帮我介绍如何发送参数
我的logcat响应
04-04 12:36:35.248 24381-24494/com.xyz.xyz E/Error﹕ Index 1 out of range [0..1)
04-04 12:36:35.248 24381-24494/com.xyz.xyz W/System.err﹕ org.json.JSONException: Index 1 out of range [0..1)
04-04 12:36:35.248 24381-24494/com.xyz.xyz W/System.err﹕ at org.json.JSONArray.get(JSONArray.java:282)
04-04 12:36:35.248 24381-24494/com.xyz.xyz W/System.err﹕ at org.json.JSONArray.getJSONObject(JSONArray.java:510)
04-04 12:36:35.248 24381-24494/com.xyz.xyz W/System.err﹕ at com.xyz.xyz.News$DownloadJSON.doInBackground(News.java:187)
04-04 12:36:35.248 24381-24494/com.xyz.xyz W/System.err﹕ at com.xyz.xyz.News$DownloadJSON.doInBackground(News.java:134)
04-04 12:36:35.248 24381-24494/com..xyz.xyz W/System.err﹕ at android.os.AsyncTask$2.call(AsyncTask.java:288)
04-04 12:36:35.248 24381-24494/com..xyz.xyz W/System.err﹕ at java.util.concurrent.FutureTask.run(FutureTask.java:237)
04-04 12:36:35.248 24381-24494/com..xyz.xyz W/System.err﹕ at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:231)
04-04 12:36:35.248 24381-24494/com..xyz.xyz W/System.err﹕ at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
04-04 12:36:35.248 24381-24494/com..xyz.xyz W/System.err﹕ at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
04-04 12:36:35.248 24381-24494/com..xyz.xyz W/System.err﹕ at java.lang.Thread.run(Thread.java:841)
04-04 12:36:35.268
04-04 12:36:35.478 24381-24535/com..xyz.xyz I/MemoryCache﹕ cache size=203312 length=1
04-04 12:36:35.528 24381-24536/com..xyz.xyz D/dalvikvm﹕ GC_FOR_ALLOC freed 5897K, 13% free 40087K/46020K, paused 19ms, total 19ms
04-04 12:36:35.568 24381-24532/com..xyz.xyz I/MemoryCache﹕ cache size=203312 length=1
04-04 12:36:35.568 24381-24536/com..xyz.xyz I/MemoryCache﹕ cache size=203312 length=1
04-04 12:36:35.578 24381-24534/com..xyz.xyz I/MemoryCache﹕ cache size=203312 length=1
04-04 12:36:35.638 24381-24533/com..xyz.xyz I/MemoryCache﹕ cache size=203312 length=1
04-04 12:36:35.638 24381-24535/com..xyz.xyz I/MemoryCache﹕ cache size=203312 length=1
04-04 12:36:35.658 24381-24534/com..xyz.xyz I/MemoryCache﹕ cache size=203312 length=1
04-04 12:36:35.658 24381-24532/com..xyz.xyz I/MemoryCache﹕ cache size=203312 length=1
04-04 12:36:35.658 24381-24536/com..xyz.xyz I/MemoryCache﹕ cache size=203312 length=1
04-04 12:36:40.268 24381-24381/com..xyz.xyz I/Timeline﹕ Timeline: Activity_launch_request id:com..xyz.xyz time:24184635
04-04 12:36:40.638 24381-24381/com..xyz.xyz I/Timeline﹕ Timeline: Activity_idle id: android.os.BinderProxy@42b257d8 time:24185013
04-04 12:36:42.098 24381-24381/com.xyz.xyz D/Volley﹕ [1] 2.onErrorResponse: