排球库NetworkDispatcher.run错误 [英] Volley library NetworkDispatcher.run error
本文介绍了排球库NetworkDispatcher.run错误的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我的程序中有NetworkDispatcher.run错误，我正在使用排球库. 我的程序部分是.我一直都做，但是没有用，请帮助我来做我的程序.我浏览了许多网站内容，但没有任何帮助.我正在做的是android中的登录验证程序.
In my program there is NetworkDispatcher.run error I am using volley library. my program part is .I done all the way but nothing worked please helpme to do my program.I searced through many web content but nothing helped me.I am doing is a Login verification program in android.
if(!(usr.getText().toString().length()<11)&&!(pwd.getText().toString().length()<3)) {
susr = usr.getText().toString();
spwd = pwd.getText().toString();
String whois = susr.substring(0, Math.min(susr.length(), 2));
if (whois.equals("AG") || whois.equals("RT")) {
if (whois.equals("AG")) {
id = susr.substring(susr.length() - 9);
Toast.makeText(getApplicationContext(), id, Toast.LENGTH_LONG).show();
StringRequest stringRequest = new StringRequest(Request.Method.POST, agenturl,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
//Toast.makeText(getApplicationContext(),response,Toast.LENGTH_LONG).show();
if(response.equals("0")){
Toast.makeText(getApplicationContext(),"Login successful",Toast.LENGTH_LONG).show();
Intent intent=new Intent(getBaseContext(),Deals.class);
startActivity(intent);
}else{
Toast.makeText(getApplicationContext(),"username or password is incorrect",Toast.LENGTH_LONG).show();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
//Toast.makeText(MainActivity.this,error.toString(), Toast.LENGTH_LONG).show();
if(error instanceof NoConnectionError) {
Toast.makeText(getApplicationContext(),"No internet Access, Check your internet connection.", Toast.LENGTH_LONG).show();
}
}
}){
@Override
protected Map<String,String> getParams(){
Map<String,String> params = new HashMap<String, String>();
params.put("id",id);
params.put("pwd",spwd);
return params;
}
};
requestQueue.add(stringRequest);
}
else if(whois.equals("RT")){
StringRequest stringRequest2 = new StringRequest(Request.Method.POST, retailerurl,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
//Toast.makeText(getApplicationContext(),"hf",Toast.LENGTH_LONG).show();
//Toast.makeText(getApplicationContext(),response,Toast.LENGTH_LONG).show();
if(response.equals("0")){
Toast.makeText(getApplicationContext(),"Login successful",Toast.LENGTH_LONG).show();
Intent intent=new Intent(getBaseContext(),Deals.class);
startActivity(intent);
}else{
Toast.makeText(getApplicationContext(),"username or password is incorrect",Toast.LENGTH_LONG).show();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
//Toast.makeText(MainActivity.this,error.toString(), Toast.LENGTH_LONG).show();
if(error instanceof NoConnectionError) {
Toast.makeText(getApplicationContext(),"No internet Access, Check your internet connection.", Toast.LENGTH_LONG).show();
}
}
}){
@Override
protected Map<String,String> getParams(){
Map<String,String> params = new HashMap<String, String>();
params.put("id",id);
params.put("pwd",spwd);
return params;
}
};
requestQueue2.add(stringRequest2);
}
} else{
Toast.makeText(getApplicationContext(), "The user id or password is incorrect", Toast.LENGTH_LONG).show();
usr.setText("");
}
}else {
Toast.makeText(getApplicationContext(), "The user id or password is incorrect", Toast.LENGTH_LONG).show();
usr.setText("");
}
错误日志目录是
E/Volley: [197] NetworkDispatcher.run: Unhandled exception java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference
java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference
at libcore.net.UriCodec.encode(UriCodec.java:132)
at java.net.URLEncoder.encode(URLEncoder.java:57)
at com.android.volley.Request.encodeParameters(Request.java:484)
at com.android.volley.Request.getBody(Request.java:470)
at com.android.volley.toolbox.HurlStack.addBodyIfExists(HurlStack.java:253)
at com.android.volley.toolbox.HurlStack.setConnectionParametersForRequest(HurlStack.java:227)
at com.android.volley.toolbox.HurlStack.performRequest(HurlStack.java:107)
at com.android.volley.toolbox.BasicNetwork.performRequest(BasicNetwork.java:97)
at com.android.volley.NetworkDispatcher.run(NetworkDispatcher.java:114)
推荐答案
该错误表明您正在获取NullPointerException.
The error is saying that you are getting NullPointerException.
这意味着您在此代码中使用的变量在运行时为空.
That means the variables you are using in this code is null at runtime.
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