progressDialog和Toast使用自定义回收视图适配器文件时出错

Question

我需要帮助在截击请求中显示toast和进度对话框，并且我使用自定义适配器文件，当点击卡片时会用截击发送数据，请提供更好的流程或修复此代码。

这是适配器文件中的onBindViewHolder

@Override
public void onBindViewHolder(MyViewHolder holder, final int position) {
final DataPicking task = taskList.get(position);
holder.numberid.setText(task.getNomorid());
holder.nama.setText(task.getNamakonsumen());
holder.rate.setText(task.getRate());
holder.tanggal.setText(task.getTanggal());
holder.salesman.setText(task.getSalesman());
holder.cardList.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(final View view) {
new AlertDialog.Builder(view.getContext())
.setTitle("Proses Picking")
.setMessage("Apakah kamu yakin ingin memproses picking data ini?")
.setIcon(android.R.drawable.ic_dialog_alert)
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
String nomorid = taskList.get(position).getNomorid();
PickingActivity picking = new PickingActivity();
picking.kirimData(nomorid);               
}})
.setNegativeButton(android.R.string.no, null).show();
}
});
}

这是kirimData函数，用于用截击发送数据

public void kirimData(final String nomorid){
// Log.e("ini kirimdata ",nomorid);
// Tag used to cancel the request
String tag_string_req = "req_login";
pDialog.setMessage("Loading ...");
showDialog();
StringRequest strReq = new StringRequest(Request.Method.POST,
Constants.URL_SET_PICKING, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.d(TAG, "Picking Response: " + response.toString());
//hideDialog();
try {
JSONObject jObj = new JSONObject(response);
Log.e(TAG, "obj: " + jObj.toString());
String error = jObj.getString("status");
Log.e(TAG, "obj: " + error);
// Check for error node in json
if (error.equals("1")) {
// user successfully logged in
// Create login session
mAdapter.notifyDataSetChanged();
} else {
// Error in login. Get the error message
String errorMsg = jObj.getString("message");
Toast.makeText(getApplicationContext(),
errorMsg, Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
// JSON error
e.printStackTrace();
Toast.makeText(getBaseContext(), "Json error: " + e.getMessage(), Toast.LENGTH_LONG).show();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
/*Intent intent = new Intent(LoginActivity.this,
MainActivity.class);
startActivity(intent);
finish();*/
Log.e(TAG, "Proses Picking Error: " + error.getMessage());
Toast.makeText(getApplicationContext(),
"Proses Picking Failed", Toast.LENGTH_LONG).show();
hideDialog();
}
}) {
@Override
protected Map<String, String> getParams() {
// Posting parameters to login url
Map<String, String> params = new HashMap<String, String>();
params.put("nomorid", nomorid);
return params;
}
};
// Adding request to request queue
AppController.getInstance().addToRequestQueue(strReq, tag_string_req);
}

这是错误日志

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.app.ProgressDialog.setMessage(java.lang.CharSequence)' on a null object reference
at com.sip.gotrack.PickingActivity.kirimData(PickingActivity.java:167)
at com.sip.gotrack.PickingAdapter$1$1.onClick(PickingAdapter.java:69)

请帮我纠正这个错误

Answer 1

您的pDialog在哪里初始化？

在kirimData中，一开始就这样初始化pDialog。

pDialog = new ProgressDialog(context);

在调用此方法之前，似乎没有初始化pDialog。