Develop Reference

Dynamically want to upload image in cardview

So basically I have attached my addimage.java code and mainpage.xml code below. whenever the user will click on addimage button he can select image and dynamically add images in my mainpage.xml file. So basically its like I want to transfer I image from activity to activity on a button click.
I tried doing that still I am stuck up a this specific point, where the user can selects image from gallery but still I don't know how will it get uploaded to mainpage.xml file.
Any help is highly appreciable.
this is my addimage.java code
public class addimage extends AppCompatActivity {
private ImageView imageView;
private Button addimage;
private ProgressBar progressBar;
android.content.Intent data;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.addimage);
imageView = (ImageView) findViewById(R.id.imageView);
addimage = (Button) findViewById(R.id.addimage);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
progressBar.setVisibility(View.INVISIBLE);
imageView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent galleryIntent = new Intent();
galleryIntent.setAction(Intent.ACTION_GET_CONTENT);
galleryIntent.setType("image/*");
startActivityForResult(galleryIntent, 1);
}
});
addimage.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (imageView != null) {
/*uploadToFirebase(imageView);*/
} else {
Toast.makeText(getApplicationContext(), "PLEASE SELECT IMAGE", Toast.LENGTH_SHORT).show();
}
}
});
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
/* super.onActivityResult(requestCode, resultCode, data);*/
switch (requestCode) {
case 2://2 is from startActivityForResult(galleryIntent, 2);
try {
Uri selectedImage = data.getData(); //get photo uri
imageView.setImageURI(selectedImage);
} catch (Exception e) {
e.printStackTrace();
}
break;
}
}
}
}
this is my mainpage.xml code
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:id="#+id/mainpage"
android:layout_height="match_parent"
tools:context=".mainpage">
<LinearLayout
android:orientation="vertical"
android:background="#color/Pink"
android:weightSum="10"
android:layout_width="match_parent"
android:layout_height="match_parent">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="2">
<TextView
android:layout_width="950dp"
android:layout_height="550dp"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:layout_marginEnd="5dp"
android:layout_marginBottom="0dp"
android:alpha="0.5"
android:background="#color/purple_200"
android:text=" BEGINNERS CALLIGRAPHY"
android:textAllCaps="false"
android:textColor="#color/DarkBlue"
android:textSize="25sp"
android:textStyle="bold" />
<Button
android:layout_width="110dp"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:layout_marginEnd="210dp"
android:layout_marginBottom="7dp"
android:text="PHOTOS"
android:textSize="20dp"
android:background="#color/white"
android:textColor="#color/purple_700"/>
<Button
android:id="#+id/button1"
android:layout_width="110dp"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentBottom="true"
android:layout_marginEnd="52dp"
android:layout_marginBottom="7dp"
android:text="VIDEOS"
android:textSize="20dp"
android:background="#color/white"
android:textColor="#color/purple_700"/>
</RelativeLayout>
<GridLayout
android:id="#+id/mainGrid"
android:layout_width="match_parent"
android:layout_height="949dp"
android:layout_weight="8"
android:alignmentMode="alignMargins"
android:columnCount="2"
android:columnOrderPreserved="false"
android:padding="14dp"
android:rowCount="3">
<androidx.cardview.widget.CardView
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_rowWeight="1"
android:layout_columnWeight="1"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:layout_marginBottom="16dp"
app:cardCornerRadius="8dp"
app:cardElevation="8dp"
android:background="#color/Purple">
<LinearLayout
android:layout_width="149dp"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|center_vertical"
android:layout_margin="16dp"
android:orientation="vertical">
<ImageView
android:id="#+id/imageview_image"
android:layout_width="150dp"
android:layout_height="180dp"
android:layout_row="0"
android:layout_column="0"
android:layout_gravity="center_horizontal"
android:src="#drawable/b1" />
</LinearLayout>
</androidx.cardview.widget.CardView/>
<!-- Row 2 -->
<!-- Column 1 -->
<androidx.cardview.widget.CardView
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_rowWeight="1"
android:layout_columnWeight="1"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:layout_marginBottom="16dp"
app:cardCornerRadius="8dp"
app:cardElevation="8dp">
<LinearLayout
android:layout_width="149dp"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|center_vertical"
android:layout_margin="16dp"
android:orientation="vertical">
<ImageView
android:id="#+id/imageview_image2"
android:layout_width="150dp"
android:layout_height="180dp"
android:layout_gravity="center_horizontal"
android:src="#drawable/b3" />
</LinearLayout>
</androidx.cardview.widget.CardView>
<!-- Column 2 -->
<androidx.cardview.widget.CardView
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_rowWeight="1"
android:layout_columnWeight="1"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:layout_marginBottom="16dp"
app:cardCornerRadius="8dp"
app:cardElevation="8dp">
<LinearLayout
android:layout_width="149dp"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|center_vertical"
android:layout_margin="16dp"
android:orientation="vertical">
<ImageView
android:id="#+id/imageview_image3"
android:layout_width="190dp"
android:layout_height="180dp"
android:layout_gravity="center_horizontal"
android:src="#drawable/b4" />
</LinearLayout>
</androidx.cardview.widget.CardView>
<!-- Row 2 -->
<!-- Column 1 -->
<androidx.cardview.widget.CardView
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_rowWeight="1"
android:layout_columnWeight="1"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:layout_marginBottom="16dp"
app:cardCornerRadius="8dp"
app:cardElevation="8dp">
<LinearLayout
android:layout_width="149dp"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|center_vertical"
android:layout_margin="16dp"
android:orientation="vertical">
<ImageView
android:id="#+id/imageview_image4"
android:layout_width="150dp"
android:layout_height="200dp"
android:layout_gravity="center_horizontal"
android:src="#drawable/b5" />
</LinearLayout>
</androidx.cardview.widget.CardView>
</GridLayout>
<ImageView
android:id="#+id/expanded_image"
android:layout_marginRight="30dp"
android:layout_width="350dp"
android:layout_height="900dp"
android:visibility="invisible"
android:layout_gravity="center"/>
<!--android:layout_gravity="center"-->
</LinearLayout>
</ScrollView>
If more code is required please comment below.

try to add code to this addimage class:
public class addimage extends AppCompatActivity {
private ImageView imageView;
private Button addimage;
private ProgressBar progressBar;
android.content.Intent data;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.addimage);
imageView = (ImageView) findViewById(R.id.imageView);
addimage = (Button) findViewById(R.id.addimage);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
progressBar.setVisibility(View.INVISIBLE);
imageView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent galleryIntent = new Intent();
galleryIntent.setAction(Intent.ACTION_GET_CONTENT);
galleryIntent.setType("image/*");
startActivityForResult(galleryIntent, 1);
}
});
addimage.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (imageView != null) {
/*uploadToFirebase(imageView);*/
} else {
Toast.makeText(getApplicationContext(), "PLEASE SELECT IMAGE", Toast.LENGTH_SHORT).show();
}
}
});
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case 1://1 is from startActivityForResult(galleryIntent, 2);
try {
Uri selectedImage = data.getData(); //get photo uri
imageView.setImageURI(selectedImage);
} catch (Exception e) {
e.printStackTrace();
}
break;
}
}
}

setOnClickListener crashes the app - Android

I've 3 activity in my app. I set setOnClickListener on all the imagebutton in all the 3 activity. When I run the application and on clicking the first button in the first activity the app crash, but if I comment out addListenerOnButton code in the second activity the app works just fine. Any help is appreciated
This is the code of MainActivity.java
package com.example.caa;
import androidx.appcompat.app.AppCompatActivity;
import android.content.Intent;
import android.os.Bundle;
import android.widget.ImageButton;
import android.view.View;
public class MainActivity extends AppCompatActivity {
ImageButton maschio, femmina;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
addListenerOnButton();
}
public void addListenerOnButton() {
maschio = (ImageButton) findViewById(R.id.Uomo);
femmina = (ImageButton) findViewById(R.id.Donna);
maschio.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v){
Intent i = new Intent(MainActivity.this, Scelta_Simbolo.class);
String genere = "maschio";
i.putExtra("genere", genere);
startActivity(i);
/*SERVE PER VEDERE DIRETTAMENTE SU SCHERMO UN MESSAGGIO
Toast.makeText(MainActivity.this,
"ImageButton is clicked!", Toast.LENGTH_SHORT).show();*/
}
});
femmina.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v){
Intent i = new Intent(MainActivity.this, Scelta_Simbolo.class);
String genere = "femmina";
i.putExtra("genere", genere);
startActivity(i);
}
});
}
}
And activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/sfondo"
tools:context=".MainActivity">
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Pagina 1 - TEST"
android:textAlignment="center"
android:textColor="#FFFFFF"
android:textSize="24sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintHorizontal_bias="0.497"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.057" />
<ImageButton
android:id="#+id/Donna"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#00FFFFFF"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.826"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.661"
app:srcCompat="#drawable/woman" />
<ImageButton
android:id="#+id/Uomo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#00FFFFFF"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.793"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.238"
app:srcCompat="#drawable/man" />
<TextView
android:id="#+id/Voce_Uomo"
android:layout_width="157dp"
android:layout_height="35dp"
android:text="Voce Maschile "
android:textAlignment="center"
android:textColor="#FFFFFF"
android:textSize="24sp"
android:textStyle="bold|italic"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.208"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.28" />
<TextView
android:id="#+id/Voce_Donna"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Voce Femminile"
android:textAlignment="center"
android:textColor="#FFFFFF"
android:textSize="24sp"
android:textStyle="bold|italic"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.218"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.629" />
</androidx.constraintlayout.widget.ConstraintLayout>
This is second class code: Scelta_Simbolo.java (without comment on setOnClickListener so in this case crash)
package com.example.caa;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageButton;
public class Scelta_Simbolo extends MainActivity {
ImageButton si_no, su_giu, ok_nope;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_scelta_simbolo);
addListenerOnButton();
}
public void addListenerOnButton() {
si_no = (ImageButton) findViewById(R.id.si_no_button);
// su_giu = (ImageButton) findViewById(R.id.su_giu_button);
// ok_nope = (ImageButton) findViewById(R.id.ok_nope_button);
Bundle receiveBundle = this.getIntent().getExtras();
final String receiveValue = receiveBundle.getString("genere");
si_no.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v){
/* Intent i = new Intent(Scelta_Simbolo.this, Ripr_Audio.class);
String scelta = "si_no";
i.putExtra("scelta", receiveValue);
startActivity(i);*/
}
});
/* su_giu.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v){
Intent i = new Intent(Scelta_Simbolo.this, Ripr_Audio.class);
String scelta = "su_giu";
i.putExtra("scelta", scelta);
startActivity(i);
}
});
ok_nope.setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View v){
Intent i = new Intent(Scelta_Simbolo.this, Ripr_Audio.class);
String scelta = "ok_nope";
i.putExtra("scelta", scelta);
startActivity(i);
}
});
*/
}
}
And the xml activity_scelta_simbolo.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/sfondo">
<TextView
android:id="#+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Pagina 2 - TEST"
android:textAlignment="center"
android:textColor="#FFFFFF"
android:textSize="24sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.497"
app:layout_constraintStart_toStartOf="#+id/textView3"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.057" />
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Scegli quale tipologia di simboli vuoi utlizzare:"
android:textAlignment="center"
android:textColor="#FFFFFF"
android:textSize="25sp"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.149" />
<ImageButton
android:id="#+id/si_no_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#00FFFFFF"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="#+id/textView2"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="#+id/textView2"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.336"
app:srcCompat="#drawable/si_no" />
<ImageButton
android:id="#+id/su_giu_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#00FFFFFF"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="#+id/si_no_button"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="#+id/si_no_button"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.531"
app:srcCompat="#drawable/su_giu" />
<ImageButton
android:id="#+id/ok_nope_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#00FFFFFF"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="#+id/su_giu_button"
app:layout_constraintHorizontal_bias="1.0"
app:layout_constraintStart_toStartOf="#+id/su_giu_button"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.728"
app:srcCompat="#drawable/ok_nope" />
</androidx.constraintlayout.widget.ConstraintLayout>
Thank you

Android Studio button going in to wrong page

In my main page I have 3 different buttons.
Login (loginB)
Create a new account (createB)
Terms of conduct (termsB)
So far it has worked just fine, but for some reason I have now faced a problem with the create new account button. It did go to the right page before but now it goes to a wrong page. It should be going to the CreateAccount -page but it is going to the Menu -page.
I have the java code in the MainActivity were the buttons are here:
public class MainActivity extends AppCompatActivity {
Button loginB;
Button termsB;
Button createB;
EditText emailL,passwordL;
FirebaseAuth fAuth;
ProgressBar progressB;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
createB = findViewById(R.id.createB);
createB.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
openCreateAccount();
}
});
termsB = findViewById(R.id.termsB);
termsB.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
openTermsOfConduct();
}
});
emailL = findViewById(R.id.emailL);
passwordL = findViewById(R.id.passwordL);
fAuth = FirebaseAuth.getInstance();
loginB = findViewById(R.id.loginB);
progressB = findViewById(R.id.progressB);
loginB.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String email = emailL.getText().toString().trim();
String password = passwordL.getText().toString().trim();
if(TextUtils.isEmpty(email)){
emailL.setError("Email is required.");
return;
}
if(TextUtils.isEmpty(password)){
passwordL.setError("Password is required.");
return;
}
if(password.length() <6){
passwordL.setError("Password must be at least 6 characters.");
}
progressB.setVisibility(View.VISIBLE);
//authenticate the user
fAuth.signInWithEmailAndPassword(email,password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
if(task.isSuccessful()){
Toast.makeText(MainActivity.this, "Logged in successfully", Toast.LENGTH_SHORT).show();
startActivity(new Intent(getApplicationContext(),Menu.class));
}
else{
Toast.makeText(MainActivity.this, "Error " + task.getException().getMessage(), Toast.LENGTH_SHORT).show();
progressB.setVisibility(View.INVISIBLE);
}
}
});
}
});
}
public void openCreateAccount(){
Intent intent = new Intent(this, CreateAccount.class);
startActivity(intent);
}
public void openTermsOfConduct(){
Intent intent = new Intent(this, TermsOfConduct.class);
startActivity(intent);
}
}
Main Activity xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity"
android:background="#drawable/tausta">
<TextView
android:layout_width="match_parent"
android:layout_height="180dp"
android:fontFamily="sans-serif"
android:paddingVertical="30dp"
android:text="Login"
android:textAlignment="center"
android:textColor="#000"
android:textSize="90sp"
android:layout_marginBottom="25dp"
/>
<EditText
android:id="#+id/emailL"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginHorizontal="30dp"
android:layout_marginBottom="30dp"
android:textColor="#fff"
android:textSize="25sp"
android:hint="Email"
android:textColorHint="#fff"
/>
<EditText
android:id="#+id/passwordL"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginHorizontal="30dp"
android:inputType="textPassword"
android:layout_marginBottom="30dp"
android:textColor="#fff"
android:textSize="25sp"
android:hint="Password"
android:textColorHint="#fff"
/>
<Button
android:id="#+id/loginB"
android:layout_width="match_parent"
android:layout_height="50dp"
android:text="Login"
android:layout_marginHorizontal="30dp"
android:layout_marginBottom="25dp"
android:background="#drawable/button_bg"
/>
<Button
android:id="#+id/createB"
android:layout_width="match_parent"
android:layout_height="50dp"
android:text="Create a new account"
android:layout_marginHorizontal="30dp"
android:layout_marginBottom="25dp"
android:background="#drawable/button_bg"
/>
<Button
android:id="#+id/termsB"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Terms and conditions"
android:layout_marginHorizontal="30dp"
android:textColor="#0070ff"
android:textAlignment="center"
android:background="#android:color/transparent"
/>
<ProgressBar
android:id="#+id/progressB"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="invisible"
/>
</LinearLayout>
CreateAccount java:
public class CreateAccount extends AppCompatActivity {
Button registerB;
EditText nameR,emailR,pnumberR,passwordR;
FirebaseAuth fAuth;
ProgressBar progressB;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_create_account2);
nameR = findViewById(R.id.nameR);
emailR = findViewById(R.id.emailR);
pnumberR = findViewById(R.id.pnumberR);
passwordR = findViewById(R.id.passwordR);
progressB = findViewById(R.id.progressB);
fAuth = FirebaseAuth.getInstance();
//check if user registered
if(fAuth.getCurrentUser() != null){
startActivity(new Intent(getApplicationContext(),Menu.class));
finish();
}
registerB = findViewById(R.id.registerB);
registerB.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
String email = emailR.getText().toString().trim();
String password = passwordR.getText().toString().trim();
if(TextUtils.isEmpty(email)){
emailR.setError("Email is required.");
return;
}
if(TextUtils.isEmpty(password)){
passwordR.setError("Password is required.");
return;
}
if(password.length() <6){
passwordR.setError("Password must be ata least 6 characters.");
return;
}
progressB.setVisibility(View.VISIBLE);
//register the user to FireBase
fAuth.createUserWithEmailAndPassword(email,password).addOnCompleteListener(new OnCompleteListener<AuthResult>() {
#Override
public void onComplete(#NonNull Task<AuthResult> task) {
if(task.isSuccessful()){
Toast.makeText(CreateAccount.this, "User created.", Toast.LENGTH_SHORT).show();
startActivity(new Intent(getApplicationContext(),Menu.class));
}
else{
Toast.makeText(CreateAccount.this, "Error " +task.getException().getMessage(), Toast.LENGTH_SHORT).show();
}
}
});
}
});
}
}
CreateAccount xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".CreateAccount"
android:background="#drawable/tausta"
>
<TextView
android:layout_width="match_parent"
android:layout_height="100dp"
android:fontFamily="sans-serif"
android:paddingVertical="20dp"
android:text="Create new account"
android:textAlignment="center"
android:textColor="#000"
android:textSize="40sp"
android:layout_marginBottom="25dp"
/>
<EditText
android:id="#+id/nameR"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Full name"
android:textColorHint="#fff"
android:textSize="25sp"
android:layout_marginHorizontal="25dp"
android:layout_marginBottom="30dp"
/>
<EditText
android:id="#+id/emailR"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Email"
android:textColorHint="#fff"
android:textSize="25sp"
android:layout_marginHorizontal="25dp"
android:layout_marginBottom="30dp"
/>
<EditText
android:id="#+id/pnumberR"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Phone number"
android:textColorHint="#fff"
android:textSize="25sp"
android:layout_marginHorizontal="25dp"
android:layout_marginBottom="30dp"
/>
<EditText
android:id="#+id/passwordR"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:hint="Password"
android:textColorHint="#fff"
android:textSize="25sp"
android:layout_marginHorizontal="25dp"
android:layout_marginBottom="30dp"
/>
<Button
android:id="#+id/registerB"
android:layout_width="match_parent"
android:layout_height="50dp"
android:text="Register"
android:layout_marginHorizontal="30dp"
android:layout_marginBottom="25dp"
android:background="#drawable/button_bg"
/>
<ProgressBar
android:id="#+id/progressB"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="invisible"
/>
</LinearLayout>

I guess you should definitely check(R.layout.activity_create_account2)and whether it is the correct xml for the CreateAccount.java
P.S. While posting questions, always mention the correct name of the xml too.

The following code might be the cause:
if(fAuth.getCurrentUser() != null){
startActivity(new Intent(getApplicationContext(),Menu.class));
finish();
}
Can you check if it's going into the if block?

buttons inside the drawerLayout dont work

I have problem with drawerLayout. in drawerLayout, i have two Linearlayouts. one is the main menu that shows directly, the otherone is active with drawer slide. when i slide the drawer menü i cant click the buttons. but when i remove the second linearLayout then the buttons in the drawer work. how can i solve it?
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/drawerLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=""
android:clickable="true"
android:contextClickable="true">
<LinearLayout
android:orientation="vertical"
android:layout_gravity="left|start"
android:background="#color/list_back"
android:layout_width="250dp"
android:layout_height="match_parent"
android:onClick="setContentView"
android:contextClickable="true"
android:clickable="true">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Ana Sayfa"
android:id="#+id/buttonAnaSayfa"
android:onClick="setContentView"
android:clickable="false"
android:contextClickable="false"
android:nestedScrollingEnabled="false" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Kalori Tablosu"
android:id="#+id/buttonKalori"
android:onClick="setContentView"
android:clickable="true"
android:contextClickable="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Glisemik İndeks Tablosu"
android:id="#+id/buttonGITablosu"
android:onClick="setContentView"
android:clickable="true"
android:contextClickable="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Vücut Kütle İndeksi"
android:id="#+id/buttonVucutKutle"
android:onClick="setContentView"
android:clickable="true"
android:contextClickable="true" />
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:foregroundGravity="center">
<ImageButton
android:layout_width="360dp"
android:layout_height="wrap_content"
android:id="#+id/imageButtonKaloriListesi"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:src="#drawable/kalori_listesi_button"
android:background="#null"
android:layout_marginTop="10dp"
android:foregroundGravity="center"
android:gravity="center"/>
<ImageButton
android:layout_width="360dp"
android:layout_height="wrap_content"
android:id="#+id/imageButtonGITablosu"
android:src="#drawable/gi_tablosu_button"
android:layout_below="#+id/imageButtonKaloriListesi"
android:layout_alignParentStart="true"
android:background="#null"
android:layout_marginTop="10dp"
android:foregroundGravity="center"
android:gravity="center"/>
<ImageButton
android:layout_width="360dp"
android:layout_height="wrap_content"
android:id="#+id/imageButtonBugunKaloriHesabi"
android:src="#drawable/bugun_kac_kalori_aldin_button"
android:background="#null"
android:layout_above="#+id/imageButtonVucutKutleIndeks"
android:layout_centerHorizontal="true"
android:layout_marginTop="10dp"
android:foregroundGravity="center"
android:gravity="center"/>
<ImageButton
android:layout_width="360dp"
android:layout_height="wrap_content"
android:id="#+id/imageButtonVucutKutleIndeks"
android:src="#drawable/vucut_kutle_indeksi_button"
android:background="#null"
android:layout_centerVertical="true"
android:layout_alignStart="#+id/imageButtonBugunKaloriHesabi"
android:layout_marginTop="10dp"
android:foregroundGravity="center"
android:gravity="center"/>
<Button
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="test"
android:id="#+id/buttontest1"
android:layout_gravity="center_horizontal" />
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="230dp"
android:layout_gravity="center_horizontal"
android:id="#+id/ad"
android:layout_marginTop="40dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"></LinearLayout>
</LinearLayout>
here is my .java ;
package com.azelirbrevo.glisemikindeks
public class "" extends AppCompatActivity {
//DrawerLayout drawerLayout;
//ActionBarDrawerToggle toggle;
//CharSequence actionBarTitle, appTitle;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.firstaftersplash);
ImageButton ImageButtonKaloriListesi = (ImageButton) findViewById(R.id.imageButtonKaloriListesi);
ImageButton imageButtonGITablosu = (ImageButton) findViewById(R.id.imageButtonGITablosu);
ImageButton imageButtonVucutKutleIndeks = (ImageButton) findViewById(R.id.imageButtonVucutKutleIndeks);
ImageButton imageButtonBugunKaloriHesabi = (ImageButton) findViewById(R.id.imageButtonBugunKaloriHesabi);
ImageButtonKaloriListesi.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(firstAfterSplash.this, KaloriListesi.class);
startActivity(intent);
}
});
imageButtonGITablosu.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(firstAfterSplash.this, GITablosu.class);
startActivity(intent);
}
});
imageButtonVucutKutleIndeks.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(firstAfterSplash.this, VucutKutleIndexHesaplama.class);
startActivity(intent);
}
});
imageButtonBugunKaloriHesabi.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(firstAfterSplash.this, bugunKacKaloriAldim.class);
startActivity(intent);
}
});
//drawerLayout = (DrawerLayout) findViewById(R.id.drawerLayout);
//actionBarTitle = appTitle = getSupportActionBar().getTitle();
Button buttonAnasayfa = (Button) findViewById(R.id.buttonAnaSayfa);
Button buttonKalori = (Button) findViewById(R.id.buttonKalori);
Button buttonGı = (Button) findViewById(R.id.buttonGITablosu);
Button buttonVucutKutle = (Button) findViewById(R.id.buttonVucutKutle);
Button test = (Button) findViewById(R.id.buttontest1);
test.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(firstAfterSplash.this, TEST.class);
startActivity(intent);
}
});
buttonAnasayfa.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "tiklandi", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(firstAfterSplash.this, GITablosu.class);
startActivity(intent);
}
});
buttonKalori.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "tiklandi", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(firstAfterSplash.this, GITablosu.class);
startActivity(intent);
}
});
buttonGı.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "tiklandi", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(firstAfterSplash.this, GITablosu.class);
startActivity(intent);
}
});
buttonVucutKutle.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "tiklandi", Toast.LENGTH_SHORT).show();
Intent intent = new Intent(firstAfterSplash.this, GITablosu.class);
startActivity(intent);
}
});
}}
this is the design

You can create a application with Navigation drawer Activity here you can see custom layout inside drawer layout and inside layout you can set any type of widgets as button, TextView and any type what ever you want.

In xml file, my drawer menu items (LinearLayout and Buttons) were over my main LinearLayout. I just cut-paste it under the main LinearLayout and it helped.
here is the updated xml file of my project, hope will help someone.
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/drawerLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=""
android:clickable="true"
android:contextClickable="true">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:foregroundGravity="center">
<ImageButton
android:layout_width="360dp"
android:layout_height="wrap_content"
android:id="#+id/imageButtonKaloriListesi"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:src="#drawable/kalori_listesi_button"
android:background="#null"
android:layout_marginTop="10dp"
android:foregroundGravity="center"
android:gravity="center"/>
<ImageButton
android:layout_width="360dp"
android:layout_height="wrap_content"
android:id="#+id/imageButtonGITablosu"
android:src="#drawable/gi_tablosu_button"
android:layout_below="#+id/imageButtonKaloriListesi"
android:layout_alignParentStart="true"
android:background="#null"
android:layout_marginTop="10dp"
android:foregroundGravity="center"
android:gravity="center"/>
<ImageButton
android:layout_width="360dp"
android:layout_height="wrap_content"
android:id="#+id/imageButtonBugunKaloriHesabi"
android:src="#drawable/bugun_kac_kalori_aldin_button"
android:background="#null"
android:layout_above="#+id/imageButtonVucutKutleIndeks"
android:layout_centerHorizontal="true"
android:layout_marginTop="10dp"
android:foregroundGravity="center"
android:gravity="center"/>
<ImageButton
android:layout_width="360dp"
android:layout_height="wrap_content"
android:id="#+id/imageButtonVucutKutleIndeks"
android:src="#drawable/vucut_kutle_indeksi_button"
android:background="#null"
android:layout_centerVertical="true"
android:layout_alignStart="#+id/imageButtonBugunKaloriHesabi"
android:layout_marginTop="10dp"
android:foregroundGravity="center"
android:gravity="center"/>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="230dp"
android:layout_gravity="center_horizontal"
android:id="#+id/ad"
android:layout_marginTop="40dp"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"></LinearLayout>
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_gravity="left|start"
android:layout_width="250dp"
android:layout_height="match_parent"
android:onClick="setContentView"
android:contextClickable="true"
android:clickable="true"
android:background="#85c7f1">
<Button
android:layout_width="fill_parent"
android:layout_height="50dp"
android:id="#+id/ButtonDrawerAnaSayfa"
android:background="#null"
android:layout_gravity="left"
android:gravity="left"/>
<Button
android:layout_width="fill_parent"
android:layout_height="50dp"
android:id="#+id/ButtonDrawerKalori"
android:background="#null"
android:layout_gravity="left"
android:gravity="left"/>
<Button
android:layout_width="fill_parent"
android:layout_height="50dp"
android:id="#+id/ButtonDrawerGI"
android:background="#null"
android:layout_gravity="left"
android:gravity="left"/>
<Button
android:layout_width="fill_parent"
android:layout_height="50dp"
android:id="#+id/ButtonDrawerVucutKutle"
android:background="#null"
android:layout_gravity="left"
android:gravity="left"/>
</LinearLayout>

onButtonClick is never used in source code?

I am writing a simple app which is working fine but the issue I have is that I am using a password condition to trigger a button click if entered correctly.
The issue is that my source code is saying 'onButtonClick' is never used and when I manually press that button in the app, it suddenly force closes and crashes. Anyone know what I am doing wrong. I am extending Activity, at the start of the source code. Should I be extending AppCompatActivity?
public class Gvoice extends Activity implements OnClickListener{
ListView lv1;
static final int check = 1111;
Button b1;
Button b_home;
EditText a1;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gvoice);
lv1 = (ListView)findViewById(R.id.LVGVoiceReturn);
b1 = (Button)findViewById(R.id.GVoice);
a1 = (EditText) findViewById(R.id.editTextHome);
b1.setOnClickListener(this);
//This now handles an automatic press of the bVoice button 1 second after the activity is opened
new Handler().postDelayed(new Runnable() {
#Override
public void run() {
b1.callOnClick();
}
}, 1000);
}
public void onButtonClick(View v) {
if (v.getId() == R.id.BHome) {
String str = a1.getText().toString();
//Go to the relevant page if any part of the phrase or word entered in the 'EditText' field contains 'xxx' which is not case sensitive
if (str.toLowerCase().contains("home")) {
Intent userintent = new Intent(Gvoice.this, PocketSphinxActivity.class);
startActivity(userintent);
} else {
Toast.makeText(getApplicationContext(), "Incorrect Information", Toast.LENGTH_SHORT).show();
}
}
}
public void onClick(View v){
Intent i1 = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
i1.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
i1.putExtra(RecognizerIntent.EXTRA_PROMPT, "Please Repeat Again");
startActivityForResult(i1, check);
}
#Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == check && resultCode == RESULT_OK){
ArrayList<String> results = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
lv1.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, results));
a1.setText((String) lv1.getItemAtPosition(0)); //Get the first phrase in the first row of list view
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
#Override
public void run() {
b_home.performClick();
}
}, 500); //Automatically click the 'Blogin' button after 500ms
}
super.onActivityResult(requestCode, resultCode, data);
}
}
Update: Below is the xml file. Please note that onButtonClick has been added to the xml file but still it force closes the app when the button is clicked using the condition statement:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ececec">
<ImageView
android:layout_width="100dip"
android:layout_height="100dip"
android:background="#drawable/patient_two"
android:id="#+id/pimage"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="85dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Patient Name: Joe Blogs"
android:id="#+id/textView"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="50dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Cause of Injury: Car crash"
android:id="#+id/textView2"
android:layout_below="#+id/pimage"
android:layout_centerHorizontal="true"
android:layout_marginTop="15dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Date of Birth:"
android:id="#+id/textView3"
android:layout_below="#+id/textView2"
android:layout_toStartOf="#+id/textView2"
android:layout_marginTop="25dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Gender:"
android:id="#+id/textView4"
android:layout_below="#+id/textView3"
android:layout_alignStart="#+id/textView3" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Occupation:"
android:id="#+id/textView5"
android:layout_below="#+id/textView4"
android:layout_alignStart="#+id/textView4" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Address:"
android:id="#+id/textView6"
android:layout_below="#+id/textView5"
android:layout_alignStart="#+id/textView5" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Medical History"
android:id="#+id/textView7"
android:layout_marginTop="15dp"
android:layout_below="#+id/textView6"
android:layout_centerHorizontal="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Heart attack"
android:id="#+id/textView8"
android:layout_marginTop="15dp"
android:layout_below="#+id/textView7"
android:layout_alignStart="#+id/textView6" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="Arthritis"
android:id="#+id/textView9"
android:layout_below="#+id/textView8"
android:layout_alignStart="#+id/textView8" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Tests Completed"
android:id="#+id/textView10"
android:layout_marginTop="15dp"
android:layout_below="#+id/textView9"
android:layout_centerHorizontal="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="X-Ray"
android:id="#+id/textView11"
android:layout_below="#+id/textView10"
android:layout_alignStart="#+id/textView9"
android:layout_marginTop="15dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="..."
android:id="#+id/textView12"
android:layout_below="#+id/textView11"
android:layout_alignStart="#+id/textView11" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:text="Tests Due"
android:id="#+id/textView14"
android:layout_below="#+id/textView12"
android:layout_centerHorizontal="true"
android:layout_marginTop="15dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceSmall"
android:text="..."
android:id="#+id/textView15"
android:layout_below="#+id/textView14"
android:layout_alignStart="#+id/textView12"
android:layout_marginTop="15dp" />
<ListView
android:layout_width="150dp"
android:layout_height="50dp"
android:id="#+id/lvVoiceReturn1"
android:textColor="#color/white"
android:layout_alignParentBottom="true"
android:layout_alignParentStart="true" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Enter"
android:id="#+id/Blogin1"
android:onClick="onButtonClick"
android:layout_alignParentBottom="true"
android:layout_toStartOf="#+id/bVoice1" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Speak"
android:id="#+id/bVoice1"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true" />
<EditText
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:id="#+id/TFusername1"
android:layout_alignParentStart="true"
android:hint="Speech to Text" />

You can 4 method handle button click :
method 1 :
public class Mtest extends Activity {
Button b1;
public void onCreate(Bundle savedInstanceState) {
...
Button b1 = (Button) findViewById(R.id.b1);
b1.setOnClickListener(myhandler1);
...
}
View.OnClickListener myhandler1 = new View.OnClickListener() {
public void onClick(View v) {
// it was the 1st button
}
};
}
method 2 :
class MTest extends Activity implements OnClickListener {
public void onCreate(Bundle savedInstanceState) {
...
Button b1 = (Button) findViewById(R.id.b1);
b1.setOnClickListener(this);
...
}
#Override
public void onClick(View v) {
}
}
method 3 in xml and android:onClick="HandleClick" :
<Button
android:id="#+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="HandleClick" />
public class MTest extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
public void HandleClick(View view) {
}
}
method 4 :
public class MTest extends Activity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button b1 = (Button) findViewById(R.id.b1);
b1.setOnClickListener(new OnClickListener() {
public void onClick(View view) {
// do stuff
}
});
}
}

The issue was to do with initially not adding onButtonClick in the xml file and also not correctly assigning the button labels in the java file.
lv1 = (ListView)findViewById(R.id.LVGVoiceReturn);
b1 = (Button)findViewById(R.id.GVoice);
a1 = (EditText) findViewById(R.id.editTextHome);
c1 = (Button)findViewById(R.id.BHome);
b1.setOnClickListener(this);
The following corrects the issues and everything is working fine now. Hope this can help others in the future