当我收到LocalBroadcast消息时，我试图发出一个截击请求。但是我得到了这个RuntimeException。我尝试使用线程，但仍然得到相同的错误。我应该用别的吗？我在方法prepareData()中获得了异常，这就是我在其中添加try / catch的原因。在这个try / catch我得到了例外。
public class NewItemsNearUFragment extends Fragment{
private SharedPref pref;
private ConnectionDetector cd;
private ProgressDialog pd;
private LocalBroadcastManager bManager;
Activity activity;
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
pref = new SharedPref(getActivity());
cd = new ConnectionDetector(getActivity());
pd = new ProgressDialog(getActivity());
bManager = LocalBroadcastManager.getInstance(getActivity());
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction("UPDATE_NOTIFY");
bManager.registerReceiver(bReceiver, intentFilter);
}
@Override
public void onDestroy() {
LocalBroadcastManager.getInstance(activity).unregisterReceiver(bReceiver);
super.onDestroy();
}
@Override
public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof Activity){
activity=(Activity) context;
}
}
private BroadcastReceiver bReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if(intent!=null){
if(intent.getAction().equals("UPDATE_NOTIFY")) {
System.out.println("sammy_received_broadcast");
new Thread() {
public void run() {
try {
activity.runOnUiThread(new Runnable() {
@Override
public void run() {
prepareData();
}
});
Thread.sleep(300);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}.start();
}
}
}
};
private void prepareData(){
try{
pd.setMessage(activity.getString(R.string.plzwait));
pd.show();
if(arrayList!=null )arrayList.clear();
if(TextUtils.isEmpty(pref.getString(Utility.HOME_LAT)))
pref.setString(Utility.HOME_LAT, String.valueOf(GPSTracker.currLat));
if(TextUtils.isEmpty(pref.getString(Utility.HOME_LANG)))
pref.setString(Utility.HOME_LANG, String.valueOf(GPSTracker.currLong));
if(TextUtils.isEmpty(pref.getString(Utility.HOME_PRICEORDER)))
pref.setString(Utility.HOME_PRICEORDER, "");
if(TextUtils.isEmpty(pref.getString(Utility.HOME_DATAORDER)))
pref.setString(Utility.HOME_DATAORDER, "");
if(TextUtils.isEmpty(pref.getString(Utility.HOME_PRODNAME)))
pref.setString(Utility.HOME_PRODNAME, "");
if(TextUtils.isEmpty(pref.getString(Utility.HOME_CATID)))
pref.setString(Utility.HOME_CATID, "");
if(TextUtils.isEmpty(pref.getString(Utility.HOME_STARTPRICE)))
pref.setString(Utility.HOME_STARTPRICE, "");
if(TextUtils.isEmpty(pref.getString(Utility.HOME_ENDPRICE)))
pref.setString(Utility.HOME_ENDPRICE, "");
StringRequest stringRequest = new StringRequest(Request.Method.POST, Utility.ALLPROD,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
pd.dismiss();
System.out.println("sammy_All_Prod_response "+response);
try {
JSONObject jObj = new JSONObject(response);
if(jObj.getInt("ACK")==1){
JSONArray jsonArray = jObj.getJSONArray("all_products");
for(int i=0;i<jsonArray.length();i++){
JSONObject main = jsonArray.getJSONObject(i);
Model home = new Model();
home.setUserid(main.getString("user_id"));
home.setTitle(main.getString("name"));
String price = "$"+main.getString("price");
home.setPrice(price);
home.setImage(main.getString("image"));
home.setPrdid(main.getString("product_id"));
arrayList.add(home);
}
}
adapter.notifyDataSetChanged();
} catch (JSONException e) {
// JSON error
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
pd.dismiss();
if (error instanceof TimeoutError) {
Toast.makeText(getActivity(),getString(R.string.tooslow),Toast.LENGTH_LONG).show();
}else if (error instanceof NoConnectionError){
Toast.makeText(getActivity(),getString(R.string.nointernet),Toast.LENGTH_LONG).show();
}else if (error instanceof AuthFailureError) {
System.out.println("sammy_AuthFailureError "+error);
} else if (error instanceof ServerError) {
System.out.println("sammy_ServerError "+error);
} else if (error instanceof NetworkError) {
System.out.println("sammy_NetworkError "+error);
} else if (error instanceof ParseError) {
System.out.println("sammy_ParseError "+error);
}
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params = new HashMap<String, String>();
params.put("user_id", pref.getString(Utility.USERID));
params.put("user_lat", pref.getString(Utility.HOME_LAT));
params.put("user_lang", pref.getString(Utility.HOME_LANG));
params.put("price_order", pref.getString(Utility.HOME_PRICEORDER));
params.put("data_order", pref.getString(Utility.HOME_DATAORDER));
params.put("product_name", pref.getString(Utility.HOME_PRODNAME));
params.put("categoryid", pref.getString(Utility.HOME_CATID));
params.put("start_price", pref.getString(Utility.HOME_STARTPRICE));
params.put("end_price", pref.getString(Utility.HOME_ENDPRICE));
System.out.println("sammy_All_Prod_params "+params);
return params;
}
};
RequestQueue requestQueue = Volley.newRequestQueue(activity.getApplicationContext());
//if(getActivity()!=null)
requestQueue.add(stringRequest);
stringRequest.setRetryPolicy(new DefaultRetryPolicy(
10000,
DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
}catch(Exception e){
System.out.println("sammy_prepareData_exception "+e);
}
}
}
答案 0 :(得分：1)
你的错误是你在线程中调用prepareData();
在prepareData()函数中，您正在进行UI操作。显示Toast，progressDialog等
Toast需要向用户界面显示活动，而threads则没有。
你应该使用UI线程：
getActivity().runOnUiThread(new Runnable() {
public void run() {
Toast.makeText(getActivity(), "Message", Toast.LENGTH_LONG).show();
}
});