Null pointer exception error : database in android - android

package com.andrd.gps;
import com.android.util.Utils;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.Spinner;
import android.widget.Toast;
import android.widget.AdapterView.OnItemSelectedListener;
public class EditUserDetailActivity extends Activity{
String strTruckType, strTruckPermit, strEmploymentType;
EditText driverNameEdtxt,ageEdtxt,addressEdtxt,liecenceNoEdtxt,contactNoEdtxt,truckNoEdtxt,fromLocationEdtxt,toLocationEdtxt,longitudeEdtxt,latitudeEdtxt;
LinearLayout addUserLayout, updateUserLayout;
Button updateBtn,cancelBtn;
UserDetail user;
TransportData database;
String strTruckNo;
Spinner employmentTypeSpn, truckPermitSpn, truckTypeSpn;
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.add_user);
user=new UserDetail();
database=new TransportData(this);
addUserLayout = (LinearLayout) findViewById(R.id.addUserlayout);
addUserLayout.setVisibility(View.GONE);
driverNameEdtxt = (EditText) findViewById(R.id.driverNameedtx);
ageEdtxt = (EditText) findViewById(R.id.ageEdtxt);
addressEdtxt = (EditText) findViewById(R.id.addressEdtxt);
liecenceNoEdtxt = (EditText) findViewById(R.id.licenceNoEdtxt);
contactNoEdtxt = (EditText) findViewById(R.id.contactNoEdtxt);
truckNoEdtxt = (EditText) findViewById(R.id.truckNoEdtxt);
fromLocationEdtxt = (EditText) findViewById(R.id.fromLocationEdtxt);
toLocationEdtxt = (EditText) findViewById(R.id.toLocationEdtxt);
longitudeEdtxt = (EditText) findViewById(R.id.longitudeEdtxt);
latitudeEdtxt = (EditText) findViewById(R.id.latitudeEdtxt);
Spinner employmentType = (Spinner) findViewById(R.id.DriverSpnr);
employmentType.setAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item,Utils.driver_type));
Spinner truckType = (Spinner)findViewById(R.id.TruckTypespnr);
truckType.setAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item,Utils.truck_type));
Spinner truckPermit = (Spinner) findViewById(R.id.TruckPermitSpnr);
truckPermit.setAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item,Utils.truck_permit));
truckPermit.setSelection(0);
truckPermit.setOnItemSelectedListener(new OnItemSelectedListener(){
#Override
public void onItemSelected(AdapterView<?> adapterView, View view,
int position, long arg3) {
strTruckPermit = adapterView.getItemAtPosition(position).toString();
}
#Override
public void onNothingSelected(AdapterView<?> arg0) {
}
});
getUserData();
updateBtn.setOnClickListener(new OnClickListener(){
public void onClick(View v) {
boolean ok = false;
try {
user.driverName = driverNameEdtxt.getText().toString();
user.age = ageEdtxt.getText().toString();
user.liecenceNo = liecenceNoEdtxt.getText().toString();
user.address = addressEdtxt.getText().toString();
user.contactNo = contactNoEdtxt.getText().toString();
user.driverType = strEmploymentType;
user.truckNo = truckNoEdtxt.getText().toString();
user.truckPermit = strTruckPermit;
user.truckType = strTruckType;
user.fromLocation= fromLocationEdtxt.getText().toString();
user.toLocation = toLocationEdtxt.getText().toString();
user.latitude = latitudeEdtxt.getText().toString();
user.longitude = longitudeEdtxt.getText().toString();
int n = database.updateUser(user);
if(n>0)
{
ok = true;
}
} catch (Exception e) {
ok= false;
}
finally{
if(ok)
{
Toast.makeText(getApplicationContext(), "Successful update data", Toast.LENGTH_LONG).show();
}
else {
Toast.makeText(getApplicationContext(), "database Error", Toast.LENGTH_LONG).show();
}
}
}
});
cancelBtn.setOnClickListener(new OnClickListener(){
public void onClick(View v) {
finish();
}
});
}
private void getUserData() {
user.truckNo = strTruckNo;
try {
database.getUserDetail(user);
driverNameEdtxt.setText(user.driverName);
ageEdtxt.setText(user.age);
addressEdtxt.setText(user.address);
liecenceNoEdtxt.setText(user.liecenceNo);
contactNoEdtxt.setText(user.contactNo);
employmentTypeSpn.setTag(user.driverType);
truckNoEdtxt.setText(user.truckNo);
truckTypeSpn.setTag(user.truckType);
truckPermitSpn.setTag(user.truckPermit);
fromLocationEdtxt.setText(user.fromLocation);
toLocationEdtxt.setText(user.toLocation);
}
catch (Exception e) {
Toast.makeText(getApplicationContext(), "database Error", Toast.LENGTH_LONG).show();
}
}
}
//error in line no 83(error name null pointer exception)


You aren't setting your Spinner instance variables. You are assigning your spinners to local variables instead.
Instead of:
Spinner employmentType = (Spinner) findViewById(R.id.DriverSpnr);
Spinner truckType = (Spinner)findViewById(R.id.TruckTypespnr);
Spinner truckPermit = (Spinner) findViewById(R.id.TruckPermitSpnr);
you need:
employmentTypeSpn = (Spinner) findViewById(R.id.DriverSpnr);
truckTypeSpn = ...
truckPermitSpn = ...
You need to also get your updateBtn somehow:
updateBtn = (Button) findViewById(R.id.update_button);

Related

always write the default selection and never change although if I select different selection on spinner

I have 2 spinner. This part of code read the selection from spinner and write to text file. The problem always write the default selection and never change although if I select different selection on spinner.Please help.
package com.apps.androidapps10;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import android.os.Environment;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.widget.EditText;
import android.view.View;
import android.widget.Spinner;
import android.widget.Toast;
public class Main2Activity extends AppCompatActivity {
Button hantarBtn;
private static final String TAG = "MEDIA";
String namaJalan = "";
String namaLorong = "";
String noKenderaan;
private String filename = "SampleFile.txt";
private String filepath = "MyFileStroage";
File myExternalFile;
EditText inputText;
String separator = System.getProperty("line.separator");
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Intent intent = getIntent();
setContentView(R.layout.activity_main2);
hantarBtn = (Button) findViewById(R.id.button);
inputText = (EditText) findViewById(R.id.editText);
try {
BufferedReader bReader = new BufferedReader(new InputStreamReader
(getAssets().open("jalan.txt")));
ArrayList<String> jalan = new ArrayList<String>();
String line = bReader.readLine();
while (line != null){
jalan.add(line);
line = bReader.readLine();
}
bReader.close();
Spinner spinner1 = (Spinner) findViewById(R.id.spinner);
ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_dropdown_item,jalan);
spinner1.setAdapter(adapter1);
namaJalan = spinner1.getSelectedItem().toString();
}catch (IOException e){
e.printStackTrace();
}
try {
BufferedReader bReader1 = new BufferedReader(new InputStreamReader
(getAssets().open("lorong.txt")));
ArrayList<String> lorong = new ArrayList<String>();
String line = bReader1.readLine();
while (line != null){
lorong.add(line);
line = bReader1.readLine();
}
bReader1.close();
Spinner spinner2 = (Spinner) findViewById(R.id.spinner2);
ArrayAdapter<String> adapter2 = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1,lorong);
spinner2.setAdapter(adapter2);
namaLorong = spinner2.getSelectedItem().toString();
}catch (IOException e) {
e.printStackTrace();
}
hantarBtn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
try {
FileOutputStream fos = new FileOutputStream(myExternalFile,true);
fos.write(inputText.getText().toString().getBytes());
fos.write("\t".getBytes());
fos.write(namaJalan.toString().getBytes());
fos.write("\t".getBytes());
fos.write(namaLorong.toString().getBytes());
fos.write("\r\n".getBytes());
fos.flush();
fos.close();
Toast.makeText(getApplicationContext(), "Write Done...",
Toast.LENGTH_SHORT).show();
//Intent intent = new Intent(Main2Activity.this, Main2Activity.class);
//startActivity(intent);
} catch (Exception e) {
e.printStackTrace();
Log.i(TAG, "Failed to write");
}
}
});
if (!isExternalStorageAvailable() || isExternalStorageReadOnly()) {
hantarBtn.setEnabled(false);
} else {
myExternalFile = new File(getExternalFilesDir(filepath), filename);
}
}
private static boolean isExternalStorageReadOnly() {
String extStorageState = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED_READ_ONLY.equals(extStorageState)) {
return true;
}
return false;
}
private static boolean isExternalStorageAvailable() {
String extStorageState = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(extStorageState)) {
return true;
}
return false;
}
}

You need to move your spinner variables to the top (The same place you have Button hantarBtn;), then move your code to get the values from the spinners into the onClickListener:
public class MainActivity{
Spinner spinner1; // There's another way of doing this,
Spinner spinner2; // but putting them here should be easiest
// The rest of your member variables
#Override
public void onCreate(){
spinner1 = (Spinner) findViewById(R.id.spinner1);
spinner2 = (Spinner) findViewById(R.id.spinner2);
// the rest of your code
button.setOnClickListener(new View.OnClickListener(){
public void onClick(View v){
// Make sure to get the values when the button is clicked
selectedItem1 = spinner1.getSelectedItem().toString();
selectedItem2 = spinner2.getSelectedItem().toString();
// whatever else you want to do when the button is clicked
}
}
}

Please use resource for handling file operation (reading / writing).
Separate the write to file to another function, then call it later
The spinner use AdapterView will use the setOnItemSelectedListener() function, not setOnClickListener() of View
Use it as below
spinner.setOnItemSelectedListener(new OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parentView, View selectedItemView,
int position, long id) {
// write to file
}
#Override
public void onNothingSelected(AdapterView<?> parentView) {
// your code here
}
});

Android Error on passing data from one activity to another acitvity

I am creating an app which calculates the total marks & percentage and shows the result in the next activity called ResultActvity. I am using same ResultActivity for showing result for 1st yr student & 2nd yr student marks, everything works fine when it come to show the result for 1st yr students but when it comes to show the result for second yr students it is only showing total marks but no % is shown. I am a newbie to android development please help me in fixing this. Thank You :).
FIRSTACTIVITY
package com.jntuhcalculator.anu.jntuhcalculator;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Typeface;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
/**
* Created by anu on 18/9/15.
*/
public class FirstMarks extends Activity {
TextView tv_Subjects1, tv_Internal1, tv_External1;
EditText et_Int_Eng, et_Int_M1, et_Int_MM, et_Int_Phy, et_Int_Chem, et_Int_Cp, et_Int_ElcsLab, et_Int_EpLab, et_Int_ItLab, et_Int_Draw;
EditText et_Ext_Eng, et_Ext_M1, et_Ext_MM, et_Ext_Phy, et_Ext_Chem, et_Ext_Cp, et_Ext_ElcsLab, et_Ext_EpLab, et_Ext_ItLab, et_Ext_Draw;
Button btn_Cal1, btn_Ok1;
int IEng,IM1,IMM,IEPhy,IEChem,ICp,IEDraw,IELCS_Lab,IEP_LAB,IIT_LAB;
int EEng,EM1,EMM,EEPhy,EEChem,ECp,EEDraw,EELCS_Lab,EEP_LAB,EIT_LAB;
int ITotal1,ETotal1,Total1;
float Percentage1;
String f1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.marks_1);
//INITIALISING VIEWS.
//INITIALISING TEXT VIEWS.
tv_Subjects1 = (TextView) findViewById(R.id.tv_Subject1);
tv_Internal1 = (TextView) findViewById(R.id.tv_Internal1);
tv_External1 = (TextView) findViewById(R.id.tv_External1);
//INITIALISING EDIT TEXT.
//INTERNAL
et_Int_Eng = (EditText) findViewById(R.id.et_Int_Eng);
et_Int_M1 = (EditText) findViewById(R.id.et_Int_M1);
et_Int_MM = (EditText) findViewById(R.id.et_Int_MM);
et_Int_Phy = (EditText) findViewById(R.id.et_Int_Phy);
et_Int_Chem = (EditText) findViewById(R.id.et_Int_Chem);
et_Int_Cp = (EditText) findViewById(R.id.et_Int_Cp);
et_Int_ElcsLab = (EditText) findViewById(R.id.et_Int_ElcsLab);
et_Int_EpLab = (EditText) findViewById(R.id.et_Int_EpLab);
et_Int_ItLab = (EditText) findViewById(R.id.et_Int_ItLab);
et_Int_Draw = (EditText) findViewById(R.id.et_Int_Draw);
//EXTERNAL
et_Ext_Eng = (EditText) findViewById(R.id.et_Ext_Eng);
et_Ext_M1 = (EditText) findViewById(R.id.et_Ext_M1);
et_Ext_MM = (EditText) findViewById(R.id.et_Ext_MM);
et_Ext_Phy = (EditText) findViewById(R.id.et_Ext_Phy);
et_Ext_Chem = (EditText) findViewById(R.id.et_Ext_Chem);
et_Ext_Cp = (EditText) findViewById(R.id.et_Ext_Cp);
et_Ext_ElcsLab = (EditText) findViewById(R.id.et_Ext_ElcsLab);
et_Ext_EpLab = (EditText) findViewById(R.id.et_Ext_EpLab);
et_Ext_ItLab = (EditText) findViewById(R.id.et_Ext_ItLab);
et_Ext_Draw = (EditText) findViewById(R.id.et_Ext_Draw);
//INITIALISING BUTTON
btn_Cal1 = (Button) findViewById(R.id.btn_Cal1);
btn_Ok1 = (Button) findViewById(R.id.btn_Ok1);
//WHEN SAVE BUTTON IS CLICKED.
btn_Ok1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//GETTING VALUES FROM EDIT TEXT.
//INTERNALS.
IEng = getIntValue(et_Int_Eng);
IM1 = getIntValue(et_Int_M1);
IMM = getIntValue(et_Int_MM);
IEPhy = getIntValue(et_Int_Phy);
IEChem = getIntValue(et_Int_Chem);
ICp = getIntValue(et_Int_Cp);
IEDraw = getIntValue(et_Int_Draw);
IELCS_Lab = getIntValue(et_Int_ElcsLab);
IEP_LAB = getIntValue(et_Int_EpLab);
//EXTERNALS.
EEng = getIntValue(et_Ext_Eng);
EM1 = getIntValue(et_Ext_M1);
EMM = getIntValue(et_Ext_MM);
EEPhy = getIntValue(et_Ext_Phy);
EEChem = getIntValue(et_Ext_Chem);
ECp = getIntValue(et_Ext_Cp);
EEDraw = getIntValue(et_Ext_Draw);
EELCS_Lab = getIntValue(et_Ext_ElcsLab);
EEP_LAB = getIntValue(et_Ext_EpLab);
EIT_LAB = getIntValue(et_Ext_ItLab);
//CALCUATIONS.
//INTERNAL TOTAL.
ITotal1 = (IEng+IM1+IMM+IEPhy+IEChem+ICp+IEDraw+IELCS_Lab+IEP_LAB+IIT_LAB);
//EXTERNAL TOTAL.
ETotal1 = (EEng+EM1+EMM+EEPhy+EEChem+ECp+EEDraw+EELCS_Lab+EEP_LAB+EIT_LAB);
//TOTAL.
Total1 = (ITotal1+ETotal1);
//PERCENTAGE.
Percentage1 = (float)(Total1/10);
f1 = Float.toString(Percentage1);
//CREATING TOAST.
Toast.makeText(getBaseContext(),"Press Result",Toast.LENGTH_SHORT).show();
}
});
btn_Cal1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(FirstMarks.this,FirstResult.class);
Bundle b = new Bundle();
b.putInt("res1",Total1);
b.putString("per1",f1);
i.putExtras(b);
startActivity(i);
finish();
}
});
}
//SUB-FUNCTION FOR GETTING INTEGER FROM EDITTEXT.
private int getIntValue(EditText et) throws NumberFormatException {
int i =0;
String s;
try {
s = et.getText().toString();
if(s.equals("")){
Toast.makeText(getApplicationContext(),"Invalid Marks",Toast.LENGTH_SHORT).show();
}
i = Integer.parseInt(s);
return i;
} catch (NumberFormatException e) {
Log.e("ERROR:", "NOT A NUMBER");
}
return 0;
}
}
**SECONDACTIVITY**
package com.jntuhcalculator.anu.jntuhcalculator;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Typeface;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
/**
* Created by anu on 19/9/15.
*/
public class SecondMarks_1 extends Activity {
TextView tv_PS,tv_MFCS,tv_DS,tv_DLD,tv_EDC,tv_BEE,tv_EELab,tv_DSLab;
TextView tv_Subjects21, tv_Internal21, tv_External21;
EditText et_Int_PS, et_Int_MFCS, et_Int_DS, et_Int_DLD, et_Int_EDC, et_Int_BEE, et_Int_EELab, et_Int_DSLab;
EditText et_Ext_PS, et_Ext_MFCS, et_Ext_DS, et_Ext_DLD, et_Ext_EDC, et_Ext_BEE, et_Ext_EELab, et_Ext_DSLab;
Button btn_Cal21, btn_Ok21;
int IPS,IMFCS,IDS,IDLD,IEDC,IBEE,IEE_Lab,IDS_Lab;
int EPS,EMFCS,EDS,EDLD,EEDC,EBEE,EEE_Lab,EDS_Lab;
int ITotal21,ETotal21,Total21;
float Percentage21;
String f21;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.secondmarks_1);
//INITIALISING VIEWS.
//INITIALISING TEXT VIEWS.
tv_Subjects21 = (TextView) findViewById(R.id.tv_Subject21);
tv_Internal21 = (TextView) findViewById(R.id.tv_Internal21);
tv_External21 = (TextView) findViewById(R.id.tv_External21);
//SUBJECT TEXT VIEWS.
tv_PS = (TextView) findViewById((R.id.tv_PS));
tv_MFCS = (TextView) findViewById((R.id.tv_MFCS));
tv_DS = (TextView) findViewById((R.id.tv_DS));
tv_DLD = (TextView) findViewById((R.id.tv_DLD));
tv_EDC = (TextView) findViewById((R.id.tv_EDC));
tv_BEE = (TextView) findViewById((R.id.tv_BEE));
tv_EELab = (TextView) findViewById((R.id.tv_EE_Lab));
tv_DSLab = (TextView) findViewById((R.id.tv_DS_Lab));
//INITIALISING EDIT TEXT.
//INTERNAL
et_Int_PS = (EditText) findViewById(R.id.et_Int_PS);
et_Int_MFCS = (EditText) findViewById(R.id.et_Int_MFCS);
et_Int_DS = (EditText) findViewById(R.id.et_Int_DS);
et_Int_DLD = (EditText) findViewById(R.id.et_Int_DLD);
et_Int_EDC = (EditText) findViewById(R.id.et_Int_EDC);
et_Int_BEE = (EditText) findViewById(R.id.et_Int_BEE);
et_Int_EELab = (EditText) findViewById(R.id.et_Int_EELab);
et_Int_DSLab = (EditText) findViewById(R.id.et_Int_DSLab);
//EXTERNAL
et_Ext_PS = (EditText) findViewById(R.id.et_Ext_PS);
et_Ext_MFCS = (EditText) findViewById(R.id.et_Ext_MFCS);
et_Ext_DS = (EditText) findViewById(R.id.et_Ext_DS);
et_Ext_DLD = (EditText) findViewById(R.id.et_Ext_DLD);
et_Ext_EDC = (EditText) findViewById(R.id.et_Ext_EDC);
et_Ext_BEE = (EditText) findViewById(R.id.et_Ext_BEE);
et_Ext_EELab = (EditText) findViewById(R.id.et_Ext_EELab);
et_Ext_DSLab = (EditText) findViewById(R.id.et_Ext_DSLab);
//INITIALISING BUTTON
btn_Cal21 = (Button) findViewById(R.id.btn_Cal21);
btn_Ok21 = (Button) findViewById(R.id.btn_Ok21);
//DISPLAYING SUBJECT NAMES WHEN TEXT VIEW IS CLICKED.
tv_PS.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
disp(tv_PS, "PS:Probabilty & Statistics");
}
});
tv_MFCS.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
disp(tv_MFCS, "MFCS:Mathematical Foundation Of Computer Science");
}
});
tv_DS.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {disp(tv_DS, "DS:Data Structures");
}
});
tv_DLD.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
disp(tv_DLD, "DLD:Digital Logic Design");
}
});
tv_EDC.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
disp(tv_EDC, "EDC:Electronic Devices & Circuits");
}
});
tv_BEE.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) { disp(tv_BEE, "BEE:Basic Electrical Engineering");
}
});
tv_EELab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) { disp(tv_EELab, "Electrical & Electronics Lab");
}
});
tv_DSLab.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {disp(tv_DSLab, "Data Structures Lab");
}
});
//WHEN SAVE BUTTON IS CLICKED.
btn_Ok21.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//GETTING VALUES FROM EDIT TEXT.
//INTERNALS.
IPS = getIntValue(et_Int_PS);
IMFCS = getIntValue(et_Int_MFCS);
IDS = getIntValue(et_Int_DS);
IDLD = getIntValue(et_Int_DLD);
IEDC = getIntValue(et_Int_EDC);
IBEE = getIntValue(et_Int_BEE);
IEE_Lab = getIntValue(et_Int_EELab);
IDS_Lab = getIntValue(et_Int_DSLab);
//EXTERNALS.
EPS = getIntValue(et_Ext_PS);
EMFCS = getIntValue(et_Ext_MFCS);
EDS = getIntValue(et_Ext_DS);
EDLD = getIntValue(et_Ext_DLD);
EEDC = getIntValue(et_Ext_EDC);
EBEE = getIntValue(et_Ext_BEE);
EEE_Lab = getIntValue(et_Ext_EELab);
EDS_Lab = getIntValue(et_Ext_DSLab);
//CALCULATIONS.
//INTERNAL TOTAL.
ITotal21 = (IPS+IMFCS+IDS+IDLD+IEDC+IBEE+IEE_Lab+IDS_Lab);
//EXTERNAL TOTAL.
ETotal21 = (EPS+EMFCS+EDS+EDLD+EEDC+EBEE+EEE_Lab+EDS_Lab);
//TOTAL.
Total21 = (ITotal21+ETotal21);
//PERCENTAGE.
Percentage21 = ((Total21/750)*100);
f21 = Float.toString(Percentage21);
//CREATING TOAST.
Toast.makeText(getBaseContext(),"Press Result",Toast.LENGTH_SHORT).show();
}
});
btn_Cal21.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(SecondMarks_1.this,FirstResult.class);
Bundle b = new Bundle();
b.putInt("res1",Total21);
b.putString("per1",f21);
i.putExtras(b);
startActivity(i);
finish();
}
});
}
//SUB-FUNCTION FOR GETTING INTEGER FROM EDITTEXT.
private int getIntValue(EditText et) throws NumberFormatException {
int i =0;
String s;
try {
s = et.getText().toString();
if(s.equals("")){
Toast.makeText(getApplicationContext(),"Invalid Marks",Toast.LENGTH_SHORT).show();
}
i = Integer.parseInt(s);
return i;
} catch (NumberFormatException e) {
Log.e("ERROR:", "NOT A NUMBER");
}
return 0;
}
private void disp(TextView tv,String s){
Toast.makeText(getApplicationContext(), s, Toast.LENGTH_SHORT).show();
}
}
**RESULTACTIVITY**
<pre><code>
package com.jntuhcalculator.anu.jntuhcalculator;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
/**
* Created by anu on 18/9/15.
*/
public class FirstResult extends Activity {
EditText et_Total1,et_Percentage1;
Button btn_Exit1;
int sres1;
String sper1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.result_first);
//INITIALISING VIEWS.
et_Total1 = (EditText) findViewById(R.id.et_Total1);
et_Percentage1 = (EditText) findViewById(R.id.et_Percentage1);
btn_Exit1 = (Button) findViewById(R.id.btn_Exit1);
//GETTING DATA FROM PREVIOUS ACTIVITY.
Bundle b = getIntent().getExtras();
sres1 = b.getInt("res1", 0);
sper1 = b.getString("per1");
//Converting Float Into String.
//f = Float.toString(sper1);
//SETTING RESULTS.
et_Total1.setText(sres1+"");
et_Percentage1.setText(sper1+"%");
//WHEN EXIT IS CLICKED.
btn_Exit1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(getBaseContext(), YearDetails.class);
i.putExtra("Total",sres1);
startActivity(i);
finish();
System.exit(0);
}
});
}
}

You are properly not able to send values between different activities, i will give you an example, try it.
The syntax is like this
For sending data
String data = getIntent().getExtras().getString("keyName");
Intent intent = new Intent(ActivityOne.this, ActivityTwo.class);
intent.putExtra("keyName","value");
For receiving at ActivityTwo
String value= getIntent().getStringExtra("keyName");
Intent intent = getIntent();
Bundle extras = intent.getExtras();
Additional hint:-
So you need to edit in FirstActivity
btn_Cal21.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent i = new Intent(SecondMarks_1.this,FirstResult.class);
Bundle b = new Bundle();
b.putInt("res1",Total21);
b.putString("per1",f21);
i.putExtras(b);
startActivity(i);
finish();
}
});
Same for the following activities.
Still Did not get ? Actually in you FirstActivity you have put
Intent i = new Intent(FirstMarks.this,FirstResult.class);
Bundle b = new Bundle();
b.putInt("res1",Total1);
b.putString("per1",f1);
And in your second activity.
Intent i = new Intent(SecondMarks_1.this,FirstResult.class);
Bundle b = new Bundle();
b.putInt("res1",Total21);
b.putString("per1",f21);
i.putExtras(b);
startActivity(i);
You see you have used per1 string in both places, change that, that is probably causing the app not to get values(possibly give some other string).
And in this part, you need to add code for 2nd activity result to be received.
Bundle b = getIntent().getExtras();
sres1 = b.getInt("res1", 0);
sper1 = b.getString("per1");
Hope that helps.

How to multiply two editText's value and accoringly get value in a textView when user enters value in android

I have two EditText and one TextView in my activity,I want to multiple both edittext value thing is that when user entering values to any of edittext ,Accordingly the textView value should be change..My code is as below:
EDITTEXTS:qty,price
TextView:tv_subtotal
main.java
package com.epe.yehki.ui;
import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import com.epe.yehki.util.Const;
import com.epe.yehki.util.Pref;
import com.epe.yehki.util.Utils;
import com.example.yehki.R;
public class PlaceOrderActivity extends ListActivity {
Button confirm, shipping;
RelativeLayout rl_adress;
TextView product_name;
TextView tv_adress;
TextView tv_select_adres;
EditText qty;
EditText price;
TextView tv_subtotal;
TextView tv_total;
ArrayAdapter<String> adapter;
String method;
ImageView back;
Double total, subtotal, min_qty, min_agree_prc, max_agree_prc, min_agree_qty, Max_agree_qty, min_qty_unit_name, max_price, min_price;
Intent i = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_place_order);
final ListView lv = getListView();
System.out.println("::::::::::::my custome Id inside ::::::::::place order" + Pref.getValue(PlaceOrderActivity.this, Const.PREF_CUSTOMER_ID, ""));
// FINDINLG IDS...!!
qty = (EditText) findViewById(R.id.et_qty);
price = (EditText) findViewById(R.id.et_price);
rl_adress = (RelativeLayout) findViewById(R.id.btn_adress);
product_name = (TextView) findViewById(R.id.tv_product_name);
tv_adress = (TextView) findViewById(R.id.tv_adress);
tv_select_adres = (TextView) findViewById(R.id.tv_select_adress);
tv_total = (TextView) findViewById(R.id.tv_total);
tv_subtotal = (TextView) findViewById(R.id.tv_subtotal);
back = (ImageView) findViewById(R.id.iv_back);
qty.setCursorVisible(false);
price.setCursorVisible(false);
lv.setVisibility(View.GONE);
String[] shipMethods = new String[] { "Sea Freight", "Air Cargo", "Express" };
adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, shipMethods);
shipping = (Button) findViewById(R.id.btn_shiping_method);
shipping.setText("Select shipping Method");
if (Pref.getValue(PlaceOrderActivity.this, Const.FLAG_ADDRESS, "").equals("")) {
max_agree_prc = Double.parseDouble(i.getStringExtra(Const.TAG_PRODUCT_AGREE_MAX_PRICE));
min_agree_prc = Double.parseDouble(i.getStringExtra(Const.TAG_PRODUCT_AGREE_MIN_PRICE));
Max_agree_qty = Double.parseDouble(i.getStringExtra(Const.TAG_PRODUCT_AGREE_MAX_QTY));
min_agree_qty = Double.parseDouble(i.getStringExtra(Const.TAG_PRODUCT_AGREE_MIN_QTY));
min_qty = Double.parseDouble(i.getStringExtra(Const.TAG_PRODUCT_MIN_ORDER_QTY));
min_qty_unit_name = Double.parseDouble(i.getStringExtra(Const.TAG_PRODUCT_MIN_ORDER_QTY_UNIT_NAME));
max_price = Double.parseDouble(i.getStringExtra(Const.TAG_PRODUCT_MAX_PRICE));
min_price = Double.parseDouble(i.getStringExtra(Const.TAG_PRODUCT_MIN_PRICE));
product_name.setText(getIntent().getStringExtra(Const.TAG_PRODUCT_NAME));
}
qty.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
qty.setCursorVisible(true);
}
});
price.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
price.setCursorVisible(true);
}
});
// SELECT ADDRESS CLICK EVENT..!
rl_adress.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
i = new Intent(PlaceOrderActivity.this, AddressListActivity.class);
startActivity(i);
}
});
shipping.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
setListAdapter(adapter);
lv.setVisibility(View.VISIBLE);
}
});
lv.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long arg3) {
method = (String) getListAdapter().getItem(position);
shipping.setText(method);
i.putExtra("shipping", method);
lv.setVisibility(View.GONE);
}
});
back.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
finish();
}
});
confirm.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// Checking for quantity and price...!!!
if (Integer.parseInt(qty.getText().toString()) >= min_qty) {
// check for quantity range
if (Integer.parseInt(price.getText().toString()) >= min_price && Integer.parseInt(price.getText().toString()) <= max_price) {
// check for price range
} else {
Utils.showCustomeAlertValidation(PlaceOrderActivity.this, "Enter Price in Range", "ALERT", "OK");
}
} else {
Utils.showCustomeAlertValidation(PlaceOrderActivity.this, "Enter Quantity in Range", "ALERT", "OK");
}
}
});
}
private void calculate() {
// TODO Auto-generated method stub
double QuantyInt = 1;
double PriceInt = 0;
if (qty != null)
QuantyInt = Double.parseDouble(qty.getText().toString());
if (price != null)
PriceInt = Double.parseDouble(price.getText().toString());
subtotal = (QuantyInt * PriceInt);
String textResult = "Your BMI is " + subtotal;
tv_subtotal.setText(textResult);
tv_total.setText(textResult);
}
}

Referencing an input :(

i was wondering if anyone could tell me how to use my input/EditText as the value for the max value (line 15, where the .nextInt(1000) is) for this random number generator. I've tried looking up how to do it and asked. Any help is greatly appreciated!
import java.util.Random;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
public class MainActivity extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final TextView textOne = (TextView) findViewById(R.id.textView1);
Button pushMe = (Button) findViewById(R.id.button1);
pushMe.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String randText = "";
// TODO Auto-generated method stub
Random randGen = new Random();
int rando = randGen.nextInt(1000) + 1;
randText = Integer.toString(rando);
textOne.setText(randText);
}
});
}

If you have an EditText in your layout with android:id="#+id/editText1", then this would be one way:
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final TextView textOne = (TextView) findViewById(R.id.textView1);
final EditText editText = (EditText) findViewById(R.id.editText1);
Button pushMe = (Button) findViewById(R.id.button1);
pushMe.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v)
{
Random randGen = new Random();
String randText = "";
int max = 0;
String input = editText.getText().toString();
try
{
max = Integer.parseInt(input);
int rando = randGen.nextInt(max) + 1;
randText = Integer.toString(rando);
}
catch (IllegalArgumentException e)
{
randText = "Invalid input";
}
textOne.setText(randText);
}
}
);
}
Please note that catch (IllegalArgumentException e) will catch both the IllegalArgumentException that Random.nextInt() can throw, as well as the NumberFormatException that Integer.parseInt() can throw.

setOnClickListener and findByViewId

this part of my code is having a problem
insertButton = (Button) findByViewId(R.id.button1);
insertButton.setOnClickListener(new OnClickListener();
it keeps saying method undefined for findByViewId, method for setOnClickListener not applicable and OnClickListener cannot be resolved
here is my full code
package edu.nyp.project;
import android.os.Bundle;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
public class AddData extends Activity {
Button insertButton = null;
EditText shopText= null;
EditText dealText= null;
EditText locationText= null;
EditText websiteText= null;
EditText categoryText= null;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.adddata);
insertButton = (Button) findByViewId(R.id.button1);
insertButton.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
DBAdapter dbAdapter = new
DBAdapter(getApplicationContext());
try{
dbAdapter.open();
String shop = shopText.getText().toString();
String deal = dealText.getText().toString();
String location = locationText.getText().toString();
String website = websiteText.getText().toString();
String category = categoryText.getText().toString();
}
catch(Exception e){
Log.d("Add Data ", e.getMessage());
}
finally{
if (dbAdapter != null)
dbAdapter.close();
}
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.adddata, menu);
return true;
}
}
may i know what is wrong?

Import below line in your activity
import android.view.View.OnClickListener;

try
insertButton.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
}
}

Use findViewById method instead of findByViewId.
insertButton = (Button) findViewById(R.id.button1);
insertButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View v)
{
//Code for action listener.
}
});

Only thing that i can find unusual about the above code is :
insertButton = (Button) findByViewId(R.id.button1);
So replace it with:
insertButton = (Button) findViewById(R.id.button1);
The rest of the code is fine. I mean the below code is perfectly fine:
insertButton.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
DBAdapter dbAdapter = new
DBAdapter(getApplicationContext());
try{
dbAdapter.open();
String shop = shopText.getText().toString();
String deal = dealText.getText().toString();
String location = locationText.getText().toString();
String website = websiteText.getText().toString();
String category = categoryText.getText().toString();
}
catch(Exception e){
Log.d("Add Data ", e.getMessage());
}
finally{
if (dbAdapter != null)
dbAdapter.close();
}
}
});
The above kind of syntax always works for me.

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