Java 执行搜索后返回null的接口
RecyclerView在搜索之后更新，mCallback返回null，但在搜索正常工作之前更新 AdapterHistorico.javaJava 执行搜索后返回null的接口,java,android,interface,nullpointerexception,Java,Android,Interface,Nullpointerexception,RecyclerView在搜索之后更新，mCallback返回null，但在搜索正常工作之前更新 AdapterHistorico.java package com.beliasdev.cadjobel.adapter; import android.content.Context; import android.content.DialogInterface; import android.support.v7.app.AlertDialog; import android.s
package com.beliasdev.cadjobel.adapter;
import android.content.Context;
import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.widget.RecyclerView;
import android.text.TextUtils;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import com.beliasdev.cadjobel.R;
import com.beliasdev.cadjobel.utility.DrawableHelper;
import com.bumptech.glide.Glide;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
public class AdapterHistorico extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private Spinner spinner1;
private String dateold;
private String datenew;
private String compareValue;
private String concluido;
private String em_andamento;
private String cancelado;
private String concluido1;
private String em_andamento1;
private String cancelado1;
private String status;
private Context context;
private LayoutInflater inflater;
private IProcessFilter mCallback;
private ArrayList<DataHistorico> data;
//List<DataHistorico> data= Collections.emptyList();
DataHistorico current;
int currentPos=0;
public AdapterHistorico(Context context, ArrayList<DataHistorico> data, IProcessFilter callback){
this.context=context;
inflater= LayoutInflater.from(context);
this.data=data;
mCallback = callback;
}
public interface IProcessFilter {
void onProcessFilter(DataHistorico produtos);
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view=inflater.inflate(R.layout.container_historico, parent,false);
MyHolder holder=new MyHolder(view);
return holder;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
final DataHistorico pedidos = data.get(position);
values from list
MyHolder myHolder= (MyHolder) holder;
final DataHistorico current = data.get(position);
dateold = current.pData;
try {
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
SimpleDateFormat df2 = new SimpleDateFormat("dd/MM/yyyy 'ás' HH:mm:ss");
datenew = df2.format(format.parse(dateold));
} catch (ParseException e) {
e.printStackTrace();
}
myHolder.txtPedidoNumero.setText("N° " + current.pNumero);
myHolder.txtPedidoCliente.setText(current.pCliente);
myHolder.txtPedidoData.setText(datenew);
myHolder.txtPedidoTotal.setText("R$ " + current.pTotal);
myHolder.edtPedido.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mCallback.onProcessFilter(pedidos); //NullPointerException here
}
});
// load image into imageview using glide
concluido = "concluido";
cancelado = "cancelado";
em_andamento= "em_andamento";
status = current.pStatus;
if (status.equals(concluido)) {
Glide.with(context).load(R.drawable.ic_pedido_concluido).into(myHolder.imgPedidoStatus);
} else if (status.equals(cancelado)) {
Glide.with(context).load(R.drawable.ic_pedido_cancelado).into(myHolder.imgPedidoStatus);
}else if (status.equals(em_andamento)) {
Glide.with(context).load(R.drawable.ic_pedido_em_andamento).into(myHolder.imgPedidoStatus);
}
}
// return total item from List
@Override
public int getItemCount() {
return data.size();
}
class MyHolder extends RecyclerView.ViewHolder{
TextView txtPedidoNumero;
TextView txtPedidoCliente;
ImageView imgPedidoStatus;
TextView txtPedidoData;
TextView txtPedidoTotal;
ImageView edtPedido;
// create constructor to get widget reference
public MyHolder(View itemView) {
super(itemView);
txtPedidoNumero= (TextView) itemView.findViewById(R.id.txtPedidoNumero);
txtPedidoCliente= (TextView) itemView.findViewById(R.id.txtPedidoCliente);
imgPedidoStatus= (ImageView) itemView.findViewById(R.id.imgPedidoStatus);
txtPedidoData = (TextView) itemView.findViewById(R.id.txtPedidoData);
txtPedidoTotal = (TextView) itemView.findViewById(R.id.txtPedidoTotal);
edtPedido = (ImageView) itemView.findViewById(R.id.edtPedido);
}
}
}
public class FragmentoHistorico extends Fragment implements AdapterHistorico.IProcessFilter {
[...]
public void onProcessFilter(DataHistorico pedidos) {
EditarPedidoDialog(pedidos);
}
private void EditarPedidoDialog(final DataHistorico pedidos){
LayoutInflater inflater = LayoutInflater.from(getActivity());
final View subView = inflater.inflate(R.layout.layout_edt_pedido, null);
[...]
private class ProcurarPedido extends AsyncTask<String, String, String> {
ProgressDialog pdLoading = new ProgressDialog(getActivity());
HttpURLConnection conn;
URL url = null;
private String searchQuery;
private View rootView;
public ProcurarPedido(String searchQuery, View rootView){
this.searchQuery=searchQuery;
this.rootView=rootView;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
//this method will be running on UI thread
pdLoading.setMessage("\tAguarde...");
pdLoading.setCancelable(false);
pdLoading.show();
}
@Override
protected String doInBackground(String... params) {
try {
// Enter URL address where your php file resides
url = new URL(ADMIN_PANEL_URL + "public/procurar-pedido-app.php");
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return e.toString();
}
try {
// Setup HttpURLConnection class to send and receive data from php and mysql
conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(READ_TIMEOUT);
conn.setConnectTimeout(CONNECTION_TIMEOUT);
conn.setRequestMethod("POST");
// setDoInput and setDoOutput to true as we send and recieve data
conn.setDoInput(true);
conn.setDoOutput(true);
// add parameter to our above url
Uri.Builder builder = new Uri.Builder().appendQueryParameter("searchQuery", searchQuery);
String query = builder.build().getEncodedQuery();
OutputStream os = conn.getOutputStream();
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
writer.write(query);
writer.flush();
writer.close();
os.close();
conn.connect();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
return e1.toString();
}
try {
int response_code = conn.getResponseCode();
// Check if successful connection made
if (response_code == HttpURLConnection.HTTP_OK) {
// Read data sent from server
InputStream input = conn.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(input));
StringBuilder result = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
result.append(line);
}
// Pass data to onPostExecute method
return (result.toString());
} else {
return("Erro na conexão!");
}
} catch (IOException e) {
e.printStackTrace();
return e.toString();
} finally {
conn.disconnect();
}
}
@Override
protected void onPostExecute(String result) {
//this method will be running on UI thread
Log.v("result", result);
pdLoading.dismiss();
ArrayList<DataHistorico> data=new ArrayList<>();
if(result.equals("no rows")) {
mRVHistoricoInfo = (RecyclerView)rootView.findViewById(R.id.ListaHistoricoInfo);
mAdapter = new AdapterHistorico(getActivity(), data, null);
mRVHistoricoInfo.setAdapter(mAdapter);
mRVHistoricoInfo.setLayoutManager(new LinearLayoutManager(getActivity()));
data.clear();
Toast.makeText(getActivity(), "Não foram encontrados pedidos pelo nome do cliente informado.", Toast.LENGTH_LONG).show();
}else{
try {
data.clear();
JSONArray jArray = new JSONArray(result);
// Extract data from json and store into ArrayList as class objects
for (int i = 0; i < jArray.length(); i++) {
JSONObject json_data = jArray.getJSONObject(i);
DataHistorico historicoData = new DataHistorico();
historicoData.pNumero= json_data.getString("nid");
historicoData.pStatus= json_data.getString("pedido_status");
historicoData.pCliente= json_data.getString("pedido_cliente");
historicoData.pEndereco= json_data.getString("pedido_endereco");
historicoData.pData= json_data.getString("pedido_data");
historicoData.pTotal= json_data.getString("pedido_total");
data.add(historicoData);
}
mRVHistoricoInfo = (RecyclerView)rootView.findViewById(R.id.ListaHistoricoInfo);
mAdapter = new AdapterHistorico(getActivity(), data, null);
mRVHistoricoInfo.setAdapter(mAdapter);
mRVHistoricoInfo.setLayoutManager(new LinearLayoutManager(getActivity()));
} catch (JSONException e) {
// You to understand what actually error is and handle it appropriately
Toast.makeText(getActivity(),"Não foi possível contatar o servidor.", Toast.LENGTH_LONG).show();
}
}
}
}
[...]
package com.beliasdev.cadjobel.adapter；
导入android.content.Context；
导入android.content.DialogInterface；
导入android.support.v7.app.AlertDialog；
导入android.support.v7.widget.RecyclerView；
导入android.text.TextUtils；
导入android.util.Log；
导入android.view.LayoutInflater；
导入android.view.view；
导入android.view.ViewGroup；
导入android.widget.AdapterView；
导入android.widget.ArrayAdapter；
导入android.widget.EditText；
导入android.widget.ImageView；
导入android.widget.LinearLayout；
导入android.widget.Spinner；
导入android.widget.TextView；
导入android.widget.Toast；
导入com.beliasdev.cadjobel.R；
导入com.beliasdev.cadjobel.utility.DrawableHelper；
导入com.bumptech.glide.glide；
导入java.text.ParseException；
导入java.text.simpleDataFormat；
导入java.util.ArrayList；
公共类AdapterHistorico扩展了RecyclerView.Adapter{
私人纺纱机1；
已过期的私有字符串；
私有字符串更新；
私有字符串比较值；
私人字符串结束符；
私人字符串em_andamento；
私有字符串取消；
私有字符串1；
私有字符串em_andmento1；
私有字符串cancelado1；
私有字符串状态；
私人语境；
私人充气机；
专用IProcessFilter mCallback；
私有数组列表数据；
//List data=Collections.emptyList（）；
数据流；
int currentPos=0；
公共AdapterHistorico（上下文上下文、ArrayList数据、IProcessFilter回调）{
this.context=context；
充气器=充气器。从（上下文）；
这个。数据=数据；
mCallback=回调；
}
公共接口IProcessFilter{
无效onProcessFilter（DataHistorico produtos）；
}
@凌驾
public RecyclerView.ViewHolder onCreateViewHolder（视图组父级，int-viewType）{
视图=充气机。充气（R.layout.container\u historico，父项，false）；
MyHolder=新的MyHolder（视图）；
报税表持有人；
}
@凌驾
BindViewHolder上的公共无效（RecyclerView.ViewHolder，int位置）{
final DataHistorico pedidos=data.get（位置）；
列表中的值
我的持有人我的持有人=（我的持有人）持有人；
最终DataHistorico电流=data.get（位置）；
dateold=current.pData；
试一试{
SimpleDateFormat=新的SimpleDateFormat（“yyyy-MM-dd HH:MM:ss”）；
SimpleDataFormat df2=新的SimpleDataFormat（“dd/MM/yyyy's'HH:MM:ss”）；
datenew=df2.format（format.parse（dateold））；
}捕获（解析异常）{
e、 printStackTrace（）；
}
myHolder.txtpedondomero.setText（“N°”+current.pNumero）；
myHolder.txtpedidoclient.setText（当前的.pclient）；
myHolder.txtPedidoData.setText（datenew）；
myHolder.txtPedidoTotal.setText（“R$”+current.pTotal）；
myHolder.edtPedido.setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图）{
onProcessFilter（pedidos）；//此处为NullPointerException
}
});
//使用glide将图像加载到imageview中
concluido=“concluido”；
cancelado=“cancelado”；
em_andamento=“em_andamento”；
状态=当前.pStatus；
如果（状态等于（结论））{
滑翔。与（上下文）。加载（R.drawable.ic_pedido_conclaido）。到（myHolder.imgPedidoStatus）；
}else if（status.equals（cancelado））{
使用（上下文）滑动。加载（R.drawable.ic_pedido_cancelado）。到（myHolder.imgPedidoStatus）；
}else if（状态等于（em_and mento））{
滑翔。与（上下文）。加载（R.drawable.ic_pedido_em_andmento）。到（myHolder.imgPedidoStatus）；
}
}
//从列表中返回总项
@凌驾
public int getItemCount（）{
返回data.size（）；
}
类MyHolder扩展了RecyclerView.ViewHolder{
TextView-txtedonumero；
TextView txtPediDoClient；
ImageView imgPedidoStatus；
TextView txtPedidoData；
text视图txtPedidoTotal；
图像视图；
//创建构造函数以获取小部件引用
公共MyHolder（查看项目视图）{
超级（项目视图）；
txtPedidoNumero=（TextView）itemView.findViewById（R.id.txtPedidoNumero）；
txtPedidoCliente=（TextView）itemView.findViewById（R.id.txtPedidoCliente）；
imgPedidoStatus=（ImageView）itemView.findViewById（R.id.imgPedidoStatus）；
txtPedidoData=（TextView）itemView.findViewById（R.id.txtPedidoData）；
txtPedidoTotal=（TextView）itemView.findViewById（R.id.txtPedidoTotal）；
edtPedido=（ImageView）itemView.findViewById（R.id.edtPedido）；
}
}
}
package com.beliasdev.cadjobel.adapter;
import android.content.Context;
import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.widget.RecyclerView;
import android.text.TextUtils;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;
import com.beliasdev.cadjobel.R;
import com.beliasdev.cadjobel.utility.DrawableHelper;
import com.bumptech.glide.Glide;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
public class AdapterHistorico extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private Spinner spinner1;
private String dateold;
private String datenew;
private String compareValue;
private String concluido;
private String em_andamento;
private String cancelado;
private String concluido1;
private String em_andamento1;
private String cancelado1;
private String status;
private Context context;
private LayoutInflater inflater;
private IProcessFilter mCallback;
private ArrayList<DataHistorico> data;
//List<DataHistorico> data= Collections.emptyList();
DataHistorico current;
int currentPos=0;
public AdapterHistorico(Context context, ArrayList<DataHistorico> data, IProcessFilter callback){
this.context=context;
inflater= LayoutInflater.from(context);
this.data=data;
mCallback = callback;
}
public interface IProcessFilter {
void onProcessFilter(DataHistorico produtos);
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view=inflater.inflate(R.layout.container_historico, parent,false);
MyHolder holder=new MyHolder(view);
return holder;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
final DataHistorico pedidos = data.get(position);
values from list
MyHolder myHolder= (MyHolder) holder;
final DataHistorico current = data.get(position);
dateold = current.pData;
try {
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
SimpleDateFormat df2 = new SimpleDateFormat("dd/MM/yyyy 'ás' HH:mm:ss");
datenew = df2.format(format.parse(dateold));
} catch (ParseException e) {
e.printStackTrace();
}
myHolder.txtPedidoNumero.setText("N° " + current.pNumero);
myHolder.txtPedidoCliente.setText(current.pCliente);
myHolder.txtPedidoData.setText(datenew);
myHolder.txtPedidoTotal.setText("R$ " + current.pTotal);
myHolder.edtPedido.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
mCallback.onProcessFilter(pedidos); //NullPointerException here
}
});
// load image into imageview using glide
concluido = "concluido";
cancelado = "cancelado";
em_andamento= "em_andamento";
status = current.pStatus;
if (status.equals(concluido)) {
Glide.with(context).load(R.drawable.ic_pedido_concluido).into(myHolder.imgPedidoStatus);
} else if (status.equals(cancelado)) {
Glide.with(context).load(R.drawable.ic_pedido_cancelado).into(myHolder.imgPedidoStatus);
}else if (status.equals(em_andamento)) {
Glide.with(context).load(R.drawable.ic_pedido_em_andamento).into(myHolder.imgPedidoStatus);
}
}
// return total item from List
@Override
public int getItemCount() {
return data.size();
}
class MyHolder extends RecyclerView.ViewHolder{
TextView txtPedidoNumero;
TextView txtPedidoCliente;
ImageView imgPedidoStatus;
TextView txtPedidoData;
TextView txtPedidoTotal;
ImageView edtPedido;
// create constructor to get widget reference
public MyHolder(View itemView) {
super(itemView);
txtPedidoNumero= (TextView) itemView.findViewById(R.id.txtPedidoNumero);
txtPedidoCliente= (TextView) itemView.findViewById(R.id.txtPedidoCliente);
imgPedidoStatus= (ImageView) itemView.findViewById(R.id.imgPedidoStatus);
txtPedidoData = (TextView) itemView.findViewById(R.id.txtPedidoData);
txtPedidoTotal = (TextView) itemView.findViewById(R.id.txtPedidoTotal);
edtPedido = (ImageView) itemView.findViewById(R.id.edtPedido);
}
}
}
public class FragmentoHistorico extends Fragment implements AdapterHistorico.IProcessFilter {
[...]
public void onProcessFilter(DataHistorico pedidos) {
EditarPedidoDialog(pedidos);
}
private void EditarPedidoDialog(final DataHistorico pedidos){
LayoutInflater inflater = LayoutInflater.from(getActivity());
final View subView = inflater.inflate(R.layout.layout_edt_pedido, null);
[...]
private class ProcurarPedido extends AsyncTask<String, String, String> {
ProgressDialog pdLoading = new ProgressDialog(getActivity());
HttpURLConnection conn;
URL url = null;
private String searchQuery;
private View rootView;
public ProcurarPedido(String searchQuery, View rootView){
this.searchQuery=searchQuery;
this.rootView=rootView;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
//this method will be running on UI thread
pdLoading.setMessage("\tAguarde...");
pdLoading.setCancelable(false);
pdLoading.show();
}
@Override
protected String doInBackground(String... params) {
try {
// Enter URL address where your php file resides
url = new URL(ADMIN_PANEL_URL + "public/procurar-pedido-app.php");
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
return e.toString();
}
try {
// Setup HttpURLConnection class to send and receive data from php and mysql
conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(READ_TIMEOUT);
conn.setConnectTimeout(CONNECTION_TIMEOUT);
conn.setRequestMethod("POST");
// setDoInput and setDoOutput to true as we send and recieve data
conn.setDoInput(true);
conn.setDoOutput(true);
// add parameter to our above url
Uri.Builder builder = new Uri.Builder().appendQueryParameter("searchQuery", searchQuery);
String query = builder.build().getEncodedQuery();
OutputStream os = conn.getOutputStream();
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(os, "UTF-8"));
writer.write(query);
writer.flush();
writer.close();
os.close();
conn.connect();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
return e1.toString();
}
try {
int response_code = conn.getResponseCode();
// Check if successful connection made
if (response_code == HttpURLConnection.HTTP_OK) {
// Read data sent from server
InputStream input = conn.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(input));
StringBuilder result = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
result.append(line);
}
// Pass data to onPostExecute method
return (result.toString());
} else {
return("Erro na conexão!");
}
} catch (IOException e) {
e.printStackTrace();
return e.toString();
} finally {
conn.disconnect();
}
}
@Override
protected void onPostExecute(String result) {
//this method will be running on UI thread
Log.v("result", result);
pdLoading.dismiss();
ArrayList<DataHistorico> data=new ArrayList<>();
if(result.equals("no rows")) {
mRVHistoricoInfo = (RecyclerView)rootView.findViewById(R.id.ListaHistoricoInfo);
mAdapter = new AdapterHistorico(getActivity(), data, null);
mRVHistoricoInfo.setAdapter(mAdapter);
mRVHistoricoInfo.setLayoutManager(new LinearLayoutManager(getActivity()));
data.clear();
Toast.makeText(getActivity(), "Não foram encontrados pedidos pelo nome do cliente informado.", Toast.LENGTH_LONG).show();
}else{
try {
data.clear();
JSONArray jArray = new JSONArray(result);
// Extract data from json and store into ArrayList as class objects
for (int i = 0; i < jArray.length(); i++) {
JSONObject json_data = jArray.getJSONObject(i);
DataHistorico historicoData = new DataHistorico();
historicoData.pNumero= json_data.getString("nid");
historicoData.pStatus= json_data.getString("pedido_status");
historicoData.pCliente= json_data.getString("pedido_cliente");
historicoData.pEndereco= json_data.getString("pedido_endereco");
historicoData.pData= json_data.getString("pedido_data");
historicoData.pTotal= json_data.getString("pedido_total");
data.add(historicoData);
}
mRVHistoricoInfo = (RecyclerView)rootView.findViewById(R.id.ListaHistoricoInfo);
mAdapter = new AdapterHistorico(getActivity(), data, null);
mRVHistoricoInfo.setAdapter(mAdapter);
mRVHistoricoInfo.setLayoutManager(new LinearLayoutManager(getActivity()));
} catch (JSONException e) {
// You to understand what actually error is and handle it appropriately
Toast.makeText(getActivity(),"Não foi possível contatar o servidor.", Toast.LENGTH_LONG).show();
}
}
}
}
[...]
公共类FragmentoHistorico扩展片段实现AdapterHistorico.IProcessFilter{
[...]
公共无效onProcessFilter（DataHistorico pedidos）{
EditarPedidoDialog（pedidos）；
}
私有void editarpediodialog（最终数据历史记录）{
LayoutInflater充气器=LayoutInflater.from（getActivity（））；
最终视图子视图=充气机。充气（R.layout.layout\u edt\u pedido，空）；
[...]
私有类ProCurpEdo扩展异步任务{
ProgressDialog pdLoading=新建ProgressDialog（getActivity（））；
httpurl连接连接；
URL=null；
私有字符串查询；
私有视图rootView；
public ProcurarPedido（字符串搜索查询、视图根视图）{
this.searchQuery=searchQuery；
this.rootView=rootView；
}
@凌驾
受保护的void onPreExecute（）{
super.onPreExecute（）；
//将运行此方法