//从卡中获取数据，但使用viewholder获取randon数据 //如何获得正确和准确的数据。
//这是我用于回收站视图的所有代码 1.列出项目 package com.example.jains.attendencemanagementsystem;
/**
* Created by jains on 6/28/2017.
*/
import android.content.Context;
import android.support.design.widget.Snackbar;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import java.util.List;
import static com.example.jains.attendencemanagementsystem.ViewHolder.IdTextView;
import static com.example.jains.attendencemanagementsystem.ViewHolder.NameTextView;
/**
* Created by JUNED on 6/16/2016.
*/
public class RecyclerViewAdapter extends RecyclerView.Adapter<ViewHolder> {
Context context;
RadioGroup myradiogroup;
RadioButton mySelectedRadioButton;
private RadioButton lastCheckedRB = null;
List<GetDataAdapter> getDataAdapter;
public RecyclerViewAdapter(List<GetDataAdapter> getDataAdapter, Context context){
super();
this.getDataAdapter = getDataAdapter;
this.context = context;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview, parent, false);
ViewHolder viewHolder = new ViewHolder(v);
return viewHolder;
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
final GetDataAdapter getDataAdapter1 = getDataAdapter.get(position);
NameTextView.setText(getDataAdapter1.getName());
IdTextView.setText(String.valueOf(getDataAdapter1.getId()));
// holder.status.setText(String.valueOf());
/** holder.setButtonClickListener(new ButtonClickListener() {
@Override
public void onButtonClick(View v, int pos) {
Snackbar.make(v, "Student " + getDataAdapter.get(pos).getName() + getDataAdapter.get(pos).getId() + " is selected", Snackbar.LENGTH_SHORT).show();
}
});
**/
View.OnClickListener rbClick = new View.OnClickListener() {
@Override
public void onClick(View v) {
RadioButton checked_rb = (RadioButton) v;
if (lastCheckedRB != null) {
lastCheckedRB.setChecked(false);
}
lastCheckedRB = checked_rb;
}
};
/** View.OnClickListener save =new View.OnClickListener() {
@Override public void onClick(View v) {
String date = dateView.getText().toString();
String mySelectedText = mySelectedRadioButton.getText().toString();
String a=getDataAdapter1.getName().toString();
String b=String.valueOf(getDataAdapter1.getId());
String type = "take";
BackgroundWorker_attendance_submit backgroundWorker = new BackgroundWorker_attendance_submit(context);
backgroundWorker.execute(type, a, b, mySelectedText, date);
}
**/
holder.P.setOnClickListener(rbClick);
holder.A.setOnClickListener(rbClick);
holder.L.setOnClickListener(rbClick);
holder.S.setOnClickListener(rbClick);
// holder.button0.setOnClickListener(save);
//CLICKED
holder.setItemClickListener(new ItemClickListener() {
@Override
public void onItemClick(View v, int pos) {
Snackbar.make(v, "Student " + getDataAdapter.get(pos).getName() + getDataAdapter.get(pos).getId() + " is selected", Snackbar.LENGTH_SHORT).show();
}
});
}
/**
cardView.setOnClickListener(new View.OnClickListener() {
@Override public void onClick(View view) {
Intent i = new Intent (view.getContext(), take_attendance.class);
i.putExtra("nn",NameTextView.getText().toString());
i.putExtra("ii",IdTextView.getText());
view.getContext().startActivity(i);
}
});
**/
@Override
public int getItemCount() {
return getDataAdapter.size();
}
}
package com.example.jains.attendencemanagementsystem;
/**
* Created by jains on 6/24/2017.
*/
import android.app.AlertDialog;
import android.content.Context;
import android.os.AsyncTask;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
/**
* Created by jains on 26//2017.
*/
public class BackgroundWorker_attendance_submit extends AsyncTask<String,Void,String> {
Context context;
AlertDialog alertDialog;
BackgroundWorker_attendance_submit(Context ctx) {
context = ctx;
}
@Override
protected String doInBackground(String... params) {
String type = params[0];
String login_url = "http://192.168.43.216/a_record_submit.php";
if(type.equals("take")) {
try {
int University_roll = Integer.parseInt(params[1]);
String student_name= params[2];
String status=params[3];
String date =params[4];
URL url = new URL(login_url);
HttpURLConnection httpURLConnection = (HttpURLConnection)url.openConnection();
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setDoOutput(true);
httpURLConnection.setDoInput(true);
OutputStream outputStream = httpURLConnection.getOutputStream();
BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(outputStream, "UTF-8"));
String post_data = URLEncoder.encode("University_roll","UTF-8")+"="+URLEncoder.encode(String.valueOf(University_roll),"UTF-8")+"&"
+URLEncoder.encode("student_name","UTF-8")+"="+URLEncoder.encode(student_name,"UTF-8")+"&"
+URLEncoder.encode("status","UTF-8")+"="+URLEncoder.encode(String.valueOf(status),"UTF-8")+"&"
+URLEncoder.encode("date","UTF-8")+"="+URLEncoder.encode(date,"UTF-8");
bufferedWriter.write(post_data);
bufferedWriter.flush();
bufferedWriter.close();
outputStream.close();
InputStream inputStream = httpURLConnection.getInputStream();
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream,"iso-8859-1"));
String result="";
String line="";
while((line = bufferedReader.readLine())!= null) {
result += line;
}
bufferedReader.close();
inputStream.close();
httpURLConnection.disconnect();
return result;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
@Override
protected void onPreExecute() {
alertDialog = new AlertDialog.Builder(context).create();
alertDialog.setTitle("Registration Status...");
}
@Override
protected void onPostExecute(String result) {
alertDialog.setMessage(result);
alertDialog.show();
}
@Override
protected void onProgressUpdate(Void... values) {
super.onProgressUpdate(values);
}
}`package com.example.jains.attendencemanagementsystem;
/**
* Created by jains on 7/1/2017.
*/
import android.view.View;
/**
* Created by Hp on 3/18/2016.
*/
public interface ItemClickListener {
void onItemClick(View v,int pos);
}`package com.example.jains.attendencemanagementsystem;
import android.support.v7.widget.CardView;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
/**
* Created by jains on 7/2/2017.
*/
public class ViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
ItemClickListener itemClickListener;
ButtonClickListener buttonClickListener;
static TextView IdTextView;
static TextView NameTextView;
static RadioButton P, A, L, S;
static Button button11;
RadioGroup myradiogroup;
RadioButton mySelectedRadioButton;
static CardView cardView;
public ViewHolder(View itemView) {
super(itemView);
IdTextView = (TextView) itemView.findViewById(R.id.textView2);
NameTextView = (TextView) itemView.findViewById(R.id.textView4);
itemView.setOnClickListener(this);
P = (RadioButton) itemView.findViewById(R.id.checkBoxP);
A = (RadioButton) itemView.findViewById(R.id.checkBoxA);
L = (RadioButton) itemView.findViewById(R.id.checkBoxL);
S = (RadioButton) itemView.findViewById(R.id.checkBoxS);
//this button is submit attendance button in card
button11 = (Button) itemView.findViewById(R.id.button11);
//these are the 4 radio button and radio group
myradiogroup = (RadioGroup) itemView.findViewById(R.id.myradiogroup);
int id = myradiogroup.getCheckedRadioButtonId();
mySelectedRadioButton = (RadioButton) itemView.findViewById(id);
cardView = (CardView)itemView.findViewById(R.id.cardview1);
}
@Override
public void onClick(View v) {
this.itemClickListener.onItemClick(v, getLayoutPosition());
}
public void setItemClickListener(ItemClickListener ic) {
this.itemClickListener = ic;
}
/** @Override
public void save(View view)
{
this.buttonClickListener.onButtonClick(view ,getLayoutPosition());
}
public void setButtonClickListener(ButtonClickListener bc)
{
this.buttonClickListener=bc;
}
**/
} /**
@Override
public void onClick(View v) {
**/
package com.example.jains.attendencemanagementsystem;
/**
* Created by jains on 6/28/2017.
*/
import android.content.Context;
import android.support.design.widget.Snackbar;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import java.util.List;
import static com.example.jains.attendencemanagementsystem.ViewHolder.IdTextView;
import static com.example.jains.attendencemanagementsystem.ViewHolder.NameTextView;
/**
1. Created by JUNED on 6/16/2016.
*/
public class RecyclerViewAdapter extends RecyclerView.Adapter<ViewHolder> {
Context context;
RadioGroup myradiogroup;
RadioButton mySelectedRadioButton;
private RadioButton lastCheckedRB = null;
List<GetDataAdapter> getDataAdapter;
public RecyclerViewAdapter(List<GetDataAdapter> getDataAdapter, Context context){
super();
this.getDataAdapter = getDataAdapter;
this.context = context;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview, parent, false);
ViewHolder viewHolder = new ViewHolder(v);
return viewHolder;
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
final GetDataAdapter getDataAdapter1 = getDataAdapter.get(position);
NameTextView.setText(getDataAdapter1.getName());
IdTextView.setText(String.valueOf(getDataAdapter1.getId()));
// holder.status.setText(String.valueOf());
/** holder.setButtonClickListener(new ButtonClickListener() {
@Override
public void onButtonClick(View v, int pos) {
Snackbar.make(v, "Student " + getDataAdapter.get(pos).getName() + getDataAdapter.get(pos).getId() + " is selected", Snackbar.LENGTH_SHORT).show();
}
});
**/
View.OnClickListener rbClick = new View.OnClickListener() {
@Override
public void onClick(View v) {
RadioButton checked_rb = (RadioButton) v;
if (lastCheckedRB != null) {
lastCheckedRB.setChecked(false);
}
lastCheckedRB = checked_rb;
}
};
/** View.OnClickListener save =new View.OnClickListener() {
@Override public void onClick(View v) {
String date = dateView.getText().toString();
String mySelectedText = mySelectedRadioButton.getText().toString();
String a=getDataAdapter1.getName().toString();
String b=String.valueOf(getDataAdapter1.getId());
String type = "take";
BackgroundWorker_attendance_submit backgroundWorker = new BackgroundWorker_attendance_submit(context);
backgroundWorker.execute(type, a, b, mySelectedText, date);
}
**/
holder.P.setOnClickListener(rbClick);
holder.A.setOnClickListener(rbClick);
holder.L.setOnClickListener(rbClick);
holder.S.setOnClickListener(rbClick);
// holder.button0.setOnClickListener(save);
//CLICKED
holder.setItemClickListener(new ItemClickListener() {
@Override
public void onItemClick(View v, int pos) {
Snackbar.make(v, "Student " + getDataAdapter.get(pos).getName() + getDataAdapter.get(pos).getId() + " is selected", Snackbar.LENGTH_SHORT).show();
}
});
}
/**
cardView.setOnClickListener(new View.OnClickListener() {
@Override public void onClick(View view) {
Intent i = new Intent (view.getContext(), take_attendance.class);
i.putExtra("nn",NameTextView.getText().toString());
i.putExtra("ii",IdTextView.getText());
view.getContext().startActivity(i);
}
});
**/
@Override
public int getItemCount() {
return getDataAdapter.size();
}
}
2. List item
package com.example.jains.attendencemanagementsystem;
import android.app.DatePickerDialog;
import android.app.Dialog;
import android.content.Context;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.Button;
import android.widget.DatePicker;
import android.widget.ProgressBar;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonArrayRequest;
import com.android.volley.toolbox.Volley;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;
public class take_attendance extends AppCompatActivity {
List<GetDataAdapter> GetDataAdapter1;
RecyclerView recyclerView;
RecyclerView.LayoutManager recyclerViewlayoutManager;
RecyclerView.Adapter recyclerViewadapter;
ProgressBar progressBar;
TextView uni,name;
RadioButton radioButton_P,radioButton_A,radioButton_L,radioButton_S;
private DatePicker datePicker;
private Calendar calendar;
private TextView dateView;
private int year, month, day;
// SharedPreferences sharedPreferences = getSharedPreferences(Config.SHARED_PREF_NAME, Context.MODE_PRIVATE);
// String t_name= sharedPreferences.getString(Config.NAME_SHARED_PREF,"Not Available");
//TextView textView=(TextView)findViewById(R.id.showuser);
//
String GET_JSON_DATA_HTTP_URL = "http://192.168.43.216/fetch_stud.php?t_name=";
String JSON_STUDENT_NAME = "student_name";
String JSON_UNIVERSITY_ROLL = "University_roll";
Button button0;
JsonArrayRequest jsonArrayRequest ;
RequestQueue requestQueue ;
RadioButton mySelectedRadioButton;
RadioGroup myradiogroup;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.take_attendance);
//uni=(TextView)findViewById(R.id.textView2);
//name=(TextView)findViewById(R.id.textView4);
GetDataAdapter1 = new ArrayList<>();
recyclerView = (RecyclerView) findViewById(R.id.recyclerView1);
progressBar = (ProgressBar) findViewById(R.id.progressBar1);
button0 = (Button)findViewById(R.id.button0) ;
recyclerView.setHasFixedSize(true);
recyclerViewlayoutManager = new LinearLayoutManager(this);
recyclerView.setLayoutManager(recyclerViewlayoutManager);
button0.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//button0.setVisibility(View.VISIBLE);
progressBar.setVisibility(View.VISIBLE);
JSON_DATA_WEB_CALL();
}
});
dateView = (TextView) findViewById(R.id.textView3);
calendar = Calendar.getInstance();
year = calendar.get(Calendar.YEAR);
month = calendar.get(Calendar.MONTH);
day = calendar.get(Calendar.DAY_OF_MONTH);
showDate(year, month+1, day);
}
public void save(View view)
{
saving();
}
private void saving()
{
// I want to get Student name and University Roll grom the card content which button is clicked by the user
String a= ViewHolder.IdTextView.getText().toString();
String b= ViewHolder.NameTextView.getText().toString();
String date = dateView.getText().toString();
myradiogroup=(RadioGroup)findViewById(R.id.myradiogroup);
int id = myradiogroup.getCheckedRadioButtonId();
mySelectedRadioButton = (RadioButton) findViewById(id);
String mySelectedText = mySelectedRadioButton.getText().toString();
String type = "take";
BackgroundWorker_attendance_submit backgroundWorker = new BackgroundWorker_attendance_submit(this);
backgroundWorker.execute(type, a,b,mySelectedText,date);
//Intent y= new Intent(register_main.this,teacher.class);
//startActivity(y);
// Toast.makeText(register_main.this, "Successfully Registered...!!!", Toast.LENGTH_LONG).show();
}
public void JSON_DATA_WEB_CALL(){
SharedPreferences sharedPreferences = getSharedPreferences(Config.SHARED_PREF_NAME, Context.MODE_PRIVATE);
final String aa= sharedPreferences.getString(Config.NAME_SHARED_PREF,"Not Available");
final String a= GET_JSON_DATA_HTTP_URL.concat(aa);
jsonArrayRequest = new JsonArrayRequest(a,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
progressBar.setVisibility(View.GONE);
// button0.setVisibility(View.GONE);
Snackbar.make(recyclerView,"Note--> Take Attendance Of All Students ",1000000000).setDuration(1000000000).show();
JSON_PARSE_DATA_AFTER_WEBCALL(response);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
});
requestQueue = Volley.newRequestQueue(this);
requestQueue.add(jsonArrayRequest);
}
public void JSON_PARSE_DATA_AFTER_WEBCALL(JSONArray array){
for(int i = 0; i<array.length(); i++) {
GetDataAdapter GetDataAdapter2 = new GetDataAdapter();
JSONObject json = null;
try {
json = array.getJSONObject(i);
GetDataAdapter2.setId(json.getInt(JSON_UNIVERSITY_ROLL));
GetDataAdapter2.setName(json.getString(JSON_STUDENT_NAME));
} catch (JSONException e) {
e.printStackTrace();
}
GetDataAdapter1.add(GetDataAdapter2);
}
recyclerViewadapter = new RecyclerViewAdapter(GetDataAdapter1, this);
recyclerView.setAdapter(recyclerViewadapter);
}
//DATE PICKER FUNCTIONS
@SuppressWarnings("deprecation")
public void setDate(View view) {
showDialog(999);
}
@Override
protected Dialog onCreateDialog(int id) {
// TODO Auto-generated method stub
if (id == 999) {
return new DatePickerDialog(this,
myDateListener, year, month, day);
}
return null;
}
private DatePickerDialog.OnDateSetListener myDateListener = new
DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker arg0,
int arg1, int arg2, int arg3) {
// TODO Auto-generated method stub
// arg1 = year
// arg2 = month
// arg3 = day
showDate(arg1, arg2+1, arg3);
}
};
private void showDate(int year, int month, int day) {
dateView.setText(new StringBuilder().append(day).append("/")
.append(month).append("/").append(year));
}
}