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Why is second floating action button not working?

I'm a beginner in android app making and I'm trying to do an app for a project. I found this tutorial and I'm currently trying to put to apps together in android studio. Both are reminders apps, however the second one (the food one), the FAB is not working it register the touch but when it does it says APP keeps stopping. If anybody can help me I'll appreciated.
First Reminder .java
public class MedicineActivity extends AppCompatActivity {
#BindView(R.id.compactcalendar_view)
CompactCalendarView mCompactCalendarView;
#BindView(R.id.date_picker_text_view)
TextView datePickerTextView;
#BindView(R.id.date_picker_button)
RelativeLayout datePickerButton;
#BindView(R.id.toolbar)
Toolbar toolbar;
#BindView(R.id.collapsingToolbarLayout)
CollapsingToolbarLayout collapsingToolbarLayout;
#BindView(R.id.app_bar_layout)
AppBarLayout appBarLayout;
#BindView(R.id.contentFrame)
FrameLayout contentFrame;
#BindView(R.id.fab_add_task)
FloatingActionButton fabAddTask;
#BindView(R.id.coordinatorLayout)
CoordinatorLayout coordinatorLayout;
#BindView(R.id.date_picker_arrow)
ImageView arrow;
private MedicinePresenter presenter;
private SimpleDateFormat dateFormat = new SimpleDateFormat("MMM dd", /*Locale.getDefault()*/Locale.ENGLISH);
private boolean isExpanded = false;
public ImageButton imageButton;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_medicine);
ButterKnife.bind(this);
setSupportActionBar(toolbar);
imageButton = (ImageButton) findViewById(R.id.image2button);
imageButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent= new Intent(MedicineActivity.this,dashboard_screen.class);
startActivity(intent);
}
});
mCompactCalendarView.setLocale(TimeZone.getDefault(), /*Locale.getDefault()*/Locale.ENGLISH);
mCompactCalendarView.setShouldDrawDaysHeader(true);
mCompactCalendarView.setListener(new CompactCalendarView.CompactCalendarViewListener() {
#Override
public void onDayClick(Date dateClicked) {
setSubtitle(dateFormat.format(dateClicked));
Calendar calendar = Calendar.getInstance();
calendar.setTime(dateClicked);
int day = calendar.get(Calendar.DAY_OF_WEEK);
if (isExpanded) {
ViewCompat.animate(arrow).rotation(0).start();
} else {
ViewCompat.animate(arrow).rotation(180).start();
}
isExpanded = !isExpanded;
appBarLayout.setExpanded(isExpanded, true);
presenter.reload(day);
}
#Override
public void onMonthScroll(Date firstDayOfNewMonth) {
setSubtitle(dateFormat.format(firstDayOfNewMonth));
}
});
setCurrentDate(new Date());
MedicineFragment medicineFragment = (MedicineFragment) getSupportFragmentManager().findFragmentById(R.id.contentFrame);
if (medicineFragment == null) {
medicineFragment = MedicineFragment.newInstance();
ActivityUtils.addFragmentToActivity(getSupportFragmentManager(), medicineFragment, R.id.contentFrame);
}
//Create MedicinePresenter
presenter = new MedicinePresenter(Injection.provideMedicineRepository(MedicineActivity.this), medicineFragment);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.medicine_menu, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == R.id.menu_stats) {
Intent intent = new Intent(this, MonthlyReportActivity.class);
startActivity(intent);
}
return super.onOptionsItemSelected(item);
}
public void setCurrentDate(Date date) {
setSubtitle(dateFormat.format(date));
mCompactCalendarView.setCurrentDate(date);
}
public void setSubtitle(String subtitle) {
datePickerTextView.setText(subtitle);
}
#OnClick(R.id.date_picker_button)
void onDatePickerButtonClicked() {
if (isExpanded) {
ViewCompat.animate(arrow).rotation(0).start();
} else {
ViewCompat.animate(arrow).rotation(180).start();
}
isExpanded = !isExpanded;
appBarLayout.setExpanded(isExpanded, true);
}
}
First Reminder XML File
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout 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:id="#+id/coordinatorLayout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.material.appbar.AppBarLayout
android:id="#+id/app_bar_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:fitsSystemWindows="true"
android:theme="#style/AppTheme.AppBarOverlay"
app:expanded="false"
app:layout_behavior="com.gautam.medicinetime.utils.ScrollingCalendarBehavior">
<com.google.android.material.appbar.CollapsingToolbarLayout
android:id="#+id/collapsingToolbarLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
android:minHeight="?attr/actionBarSize"
app:contentScrim="?attr/colorPrimary"
app:titleEnabled="false"
app:layout_scrollFlags="scroll|exitUntilCollapsed"
app:statusBarScrim="?attr/colorPrimaryDark">
<LinearLayout
android:id="#+id/compactcalendar_view_container"
android:layout_width="match_parent"
android:layout_height="250dp"
android:paddingTop="?attr/actionBarSize"
app:layout_collapseMode="parallax"
app:layout_collapseParallaxMultiplier="1.0">
<com.github.sundeepk.compactcalendarview.CompactCalendarView
android:id="#+id/compactcalendar_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingLeft="10dp"
android:paddingRight="10dp"
app:compactCalendarBackgroundColor="?attr/colorPrimary"
app:compactCalendarCurrentDayBackgroundColor="#FFC107"
app:compactCalendarCurrentSelectedDayBackgroundColor="#BBDEFB"
app:compactCalendarTextColor="#fff"
app:compactCalendarTextSize="12sp" />
</LinearLayout>
<androidx.appcompat.widget.Toolbar
android:id="#+id/toolbar"
style="#style/ToolbarStyle"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
app:layout_collapseMode="pin"
app:popupTheme="#style/AppTheme.PopupOverlay">
<RelativeLayout
android:id="#+id/date_picker_button"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?android:selectableItemBackground"
android:gravity="center_vertical"
android:clickable="true"
android:focusable="true"
android:orientation="vertical">
<TextView
android:id="#+id/date_picker_text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ellipsize="end"
android:maxLines="1"
android:textStyle="bold"
android:textSize="18sp"
android:textColor="#android:color/white" />
<ImageView
android:id="#+id/date_picker_arrow"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBottom="#id/date_picker_text_view"
android:layout_toRightOf="#id/date_picker_text_view"
app:srcCompat="#drawable/ic_arrow_drop_down"
tools:ignore="ContentDescription,RtlHardcoded" />
</RelativeLayout>
</androidx.appcompat.widget.Toolbar>
</com.google.android.material.appbar.CollapsingToolbarLayout>
</com.google.android.material.appbar.AppBarLayout>
<RelativeLayout
android:id="#+id/relativeLayout2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:backgroundTint="#color/design_default_color_background">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageButton
android:id="#+id/image2button"
android:layout_width="48dp"
android:layout_height="50dp"
android:background="#drawable/roundbutton"
android:src="#drawable/menu_icon"
android:text="Button"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.046"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.976" />
</androidx.constraintlayout.widget.ConstraintLayout>
</RelativeLayout>
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="#+id/fab_add_task"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="#dimen/sixteen_dp"
app:fabSize="normal"
app:layout_anchor="#+id/relativeLayout2"
app:layout_anchorGravity="end|bottom"
app:srcCompat="#drawable/ic_add" />
<FrameLayout
android:id="#+id/contentFrame"
android:layout_width="match_parent"
android:layout_height="674dp"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</androidx.coordinatorlayout.widget.CoordinatorLayout>
Second Remider .java
public class FoodActivity extends AppCompatActivity {
FloatingActionButton mCreateRem;
RecyclerView mRecyclerview;
ArrayList<Model> dataholder = new ArrayList<Model>();
//Array list to add reminders and display in recyclerview
myAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_food);
mRecyclerview = (RecyclerView) findViewById(R.id.recyclerView_food);
mRecyclerview.setLayoutManager(new LinearLayoutManager(getApplicationContext()));
mCreateRem = (FloatingActionButton) findViewById(R.id.create_reminder);
//Floating action button to change activity
mCreateRem.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(getApplicationContext(), FoodAddReminder.class);
startActivity(intent);
//Starts the new activity to add Reminders
}
});
Cursor cursor = new dbManager(getApplicationContext()).readallreminders();
//Cursor To Load data From the database
while (cursor.moveToNext()) {
Model model = new Model (cursor.getString(1), cursor.getString(2), cursor.getString(3));
dataholder.add(model);
}
adapter = new myAdapter(dataholder);
mRecyclerview.setAdapter(adapter);
//Binds the adapter with recyclerview
}
#Override
public void onBackPressed() {
finish();
//Makes the user to exit from the app
super.onBackPressed();
}
}
Second Reminder XML file
<?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"
tools:context=".FoodActivity"
android:id="#+id/Food_Container">
<androidx.appcompat.widget.Toolbar
android:id="#+id/FoodToolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/yellow_light"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:title="What's on you firdge?" />
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerView_food"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_marginTop="8dp"
android:visibility="invisible"
app:layout_constraintBaseline_toBottomOf="parent"
app:layout_constraintTop_toBottomOf="#id/FoodToolbar"
tools:layout_editor_absoluteX="-4dp" />
<TextView
android:id="#+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="center"
android:text="No food reminder added\n + Add now"
android:textAlignment="center"
android:textSize="18dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="#+id/recyclerView_food"
app:layout_constraintStart_toStartOf="#+id/recyclerView_food"
app:layout_constraintTop_toBottomOf="#+id/FoodToolbar"
app:layout_constraintVertical_bias="0.523"
android:visibility="gone"
/>
<ImageView
android:layout_width="379dp"
android:layout_height="46dp"
android:src="#drawable/food_icon"
app:layout_constraintBottom_toTopOf="#+id/textView4"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="#+id/FoodToolbar"
app:layout_constraintVertical_bias="0.966"
android:visibility="gone"
/>
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="#+id/create_reminder"
android:layout_width="65dp"
android:layout_height="56dp"
android:src="#drawable/ic_baseline_add_24"
app:backgroundTint="#color/yellow_light"
app:layout_anchorGravity="right|bottom"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.928"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.961" />
</androidx.constraintlayout.widget.ConstraintLayout>

You can not use applicationcontext in here, but if you want you need to add flags to the intent. So easier method for you to use "this" instead:
mCreateRem.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(this, FoodAddReminder.class);
startActivity(intent);
//Starts the new activity to add Reminders
}
});

We can only "guess" why, but "not working" and "app keeps stopping" could mean a lot of things and you didn't provide any Log information or an Exception stacktrace. Its also hard to guess what FoodAddReminder.class is, if its an activity, make sure its declared in your AndroidManifest.xml
mCreateRem.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent intent = new Intent(this, FoodAddReminder.class); // <-- is this an activity?
startActivity(intent);
//Starts the new activity to add Reminders
}
});
Check your AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.me.my.project">
<application >
<activity
android:name=".FoodAddReminder"/> <!-- here -->
</application>
</manifest>
If that is not the issue, I suspect that using getApplicationContext(), you're having this crash log
AndroidRuntimeException: Calling startActivity() from outside of an Activity context requires the FLAG_ACTIVITY_NEW_TASK flag. Is this
really what you want?
You should then tell the system you want to start a new task,
public void onClick(View v) {
Intent intent = new Intent(getApplicationContext(), FoodAddReminder.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
}
But I would suggest not doing it, instead use your FoodActivity as your calling activity to FoodReminder in this case, and pay attention to this, it should be prefixed with FoodActivity otherwise it will refer to its enclosing anonymous OnClickListener instance.
#Override
public void onClick(View v) {
Intent intent = new Intent(FoodActivity.this, FoodAddReminder.class);
startActivity(intent);
}
If none of these solved your "not working" issue, please provide a more specific Log information and reduce your code to something that is copy-and-paste-able.

How Can I Display my Questionnaire and decide what to do based on that Android App

I am working on an App in Android Studios and what I want it to do is it should ask the user would you like to either to listen to Music or watch Videos after they decide what mood they are in. The problem is that when I click the mood it goes straight to the video and when I click the back button it then asks if they would like to music or videos. So it needs to be the other way around. I am working on this in Android Studios. I will paste the code down below.
This is the code for the MainActivity.java
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button0 = (Button) findViewById(R.id.HappyButton);
Button button1 = (Button) findViewById(R.id.SadButton);
Button button2 = (Button) findViewById(R.id.MellowButton);
Button button3 = (Button) findViewById(R.id.MotivatedButton);
Button button4 = (Button) findViewById(R.id.AngryButton);
button0.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent myintent = new Intent(MainActivity.this,theOptionsPage.class);
startActivity(myintent);
openHappy();
}
});
button1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
openSad();
}
});
button2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
openMello();
}
});
button3.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
openMotivated();
}
});
button4.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
openAngry();
}
});
}
public void showMe(View v){
String button_text;
button_text = ((Button) v).getText().toString();
if(button_text.equals("HAPPY")){
Intent intent = new Intent(this,theOptionsPage.class);
startActivity(intent);
}
}
#Override
public void onClick(View view) {
}
public void openHappy(){
Intent intent = new Intent(this,YoutubeHappy.class);
startActivity(intent);
}
public void openSad(){
Intent sadintent = new Intent(this,YoutubeSad.class);
startActivity(sadintent);
}
public void openMello(){
Intent mellowintent = new Intent(this,YoutubeMellow.class);
startActivity(mellowintent);
}
public void openMotivated(){
Intent motivatedintent = new Intent(this,YoutubeMotivated.class);
startActivity(motivatedintent);
}
public void openAngry(){
Intent angryintent = new Intent(this,YoutubeAngry.class);{
startActivity(angryintent);
}
}
}
This is the activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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"
tools:context="com.code.mohamedali.hackathon2018.MainActivity">
<Button
android:id="#+id/HappyButton"
android:layout_width="141dp"
android:layout_height="75dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="32dp"
android:text="HAPPY"
android:onClick="showMe"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/FeelingView" />
<Button
android:id="#+id/SadButton"
android:layout_width="141dp"
android:layout_height="75dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="SAD"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/HappyButton" />
<Button
android:id="#+id/AngryButton"
android:layout_width="141dp"
android:layout_height="75dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="ANGRY"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/SadButton" />
<Button
android:id="#+id/MotivatedButton"
android:layout_width="141dp"
android:layout_height="75dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="MOTIVATED"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/AngryButton" />
<Button
android:id="#+id/MellowButton"
android:layout_width="141dp"
android:layout_height="75dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="12dp"
android:text="MELLOW"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.513"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/MotivatedButton" />
<TextView
android:id="#+id/FeelingView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="How Are You Feeling Today?"
android:textAlignment="center"
android:textSize="30sp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>
Below is the OptionsPage Code and XML
public class theOptionsPage extends AppCompatActivity {
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.options_page);
Button button1 = (Button) findViewById(R.id.MusicButton);
Button button2 = (Button) findViewById(R.id.VideoButton);
button1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// Intent in1 = new Intent( MainActivity.this , theOptionsPage.class);
// startActivity(in1);
}
});
}
}
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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">
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="44dp"
android:layout_marginBottom="8dp"
android:layout_marginEnd="8dp"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:text="Would You Like Muisc or Videos"
android:textAlignment="center"
android:textAllCaps="false"
android:textSize="20sp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.172" />
<Button
android:id="#+id/MusicButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginStart="80dp"
android:layout_marginTop="116dp"
android:text="Music"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/textView"
app:layout_constraintVertical_bias="0.0" />
<Button
android:id="#+id/VideoButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginEnd="72dp"
android:text="Videos"
app:layout_constraintBaseline_toBaselineOf="#+id/MusicButton"
app:layout_constraintEnd_toEndOf="parent" />
</android.support.constraint.ConstraintLayout>

Hi if you see your code in button0 click event:
button0.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Intent myintent = new Intent(MainActivity.this,theOptionsPage.class);
startActivity(myintent);
openHappy();
}
});
See that after starting the theOptionsPage activty, immediately u call openHappy(); This is why it starts the "theOptionPage" and then immediately starts the "YoutubeHappy" activity.
So remove the openHappy() call inside the click listener and then start the activity from "theOptionPage"

How Can I initialize my variables from another layout?

After much research, I have been unable to figure out how I can initialize my TextView in my java file in Android Studio. The TextView in question is located in a different layout file so I don't know the correct syntax to use. I think my question is similar to: Null pointer Exception on .setOnClickListener
But the solution for him is not working for me.
Here is my troublesome code:
Microsoft = (Button) findViewById(R.id.Microsoft);
Microsoft.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "Wrong!",
Toast.LENGTH_SHORT).show();
//TextView score = (TextView) findViewById(R.id.score);
TextView score = (TextView)
score.findViewById(R.id.question2);
(score).setText(0);
}
});
TheFindViewById part is the part I need.
FULL CODE VVVV
package org.flinthill.finalprojectv3;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.view.View.OnClickListener;
import android.widget.Toast;
import android.text.method.DigitsKeyListener;
import android.text.InputFilter;
import android.widget.TextView;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button SuSe;
Button DOS;
Button B;
Button BIOS;
Button Microsoft;
Button LenBosackandSandyLerner;
Button HaskelDiklah;
Button SteveWozniak;
SuSe = (Button) findViewById(R.id.SuSe);
SuSe.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "Wrong!",
Toast.LENGTH_SHORT).show();
TextView score = (TextView) findViewById(R.id.score);
(score).setText(0);
}
});
DOS = (Button) findViewById(R.id.DOS);
DOS.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "Wrong!",
Toast.LENGTH_SHORT).show();
TextView score = (TextView) findViewById(R.id.score);
(score).setText("0");
}
});
B = (Button) findViewById(R.id.B);
B.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "Wrong!",
Toast.LENGTH_SHORT).show();
TextView score = (TextView) findViewById(R.id.score);
(score).setText("0");
}
});
BIOS = (Button) findViewById(R.id.BIOS);
BIOS.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "Right!",
Toast.LENGTH_SHORT).show();
TextView score = (TextView) findViewById(R.id.score);
(score).setText("1");
setContentView(R.layout.question2);
}
});
//QUESTION 2
Microsoft = (Button) findViewById(R.id.Microsoft);
Microsoft.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "Wrong!",
Toast.LENGTH_SHORT).show();
//TextView score = (TextView) findViewById(R.id.score);
TextView score = (TextView)
score.findViewById(R.id.question2);
(score).setText(0);
}
});
/*LenBosackandSandyLerner = (Button)
findViewById(R.id.LenBosackandSandyLerner);
LenBosackandSandyLerner.setOnClickListener(new
View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "Right!",
Toast.LENGTH_SHORT).show();
TextView score = (TextView) findViewById(R.id.score);
(score).setText("2");
setContentView(R.layout.question3);
}
});
HaskelDiklah = (Button) findViewById(R.id.HaskelDiklah);
HaskelDiklah.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "Wrong!",
Toast.LENGTH_SHORT).show();
TextView score = (TextView) findViewById(R.id.score);
(score).setText("0");
}
});
SteveWozniak = (Button) findViewById(R.id.SteveWozniak);
SteveWozniak.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(), "Wrong!",
Toast.LENGTH_SHORT).show();
TextView score = (TextView) findViewById(R.id.score);
(score).setText("0");
}
});*/
}
}
XML CODE:
LAYOUT 1:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:background="#drawable/android"
tools:context="org.flinthill.finalprojectv3.MainActivity">
<TextView
android:layout_width="wrap_content"
android:id="#+id/LUL"
android:textColor="#color/LightGreen"
android:layout_height="wrap_content"
android:typeface="serif"
android:text="Which is NOT an OS?"
android:layout_centerHorizontal="true"
android:layout_marginTop="32dp"
android:textSize="24sp"/>
<Button
android:id="#+id/SuSe"
android:onClick="SuSeClick"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="SuSe"
android:layout_marginTop="100dp"
android:layout_below="#+id/LUL"
android:layout_centerHorizontal="true" />
<Button
android:id="#+id/BIOS"
android:onClick="BIOSClick"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="BIOS"
android:layout_below="#+id/SuSe"
android:layout_centerHorizontal="true" />
<Button
android:id="#+id/DOS"
android:onClick="DOSClick"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="DOS"
android:layout_below="#+id/BIOS"
android:layout_centerHorizontal="true" />
<Button
android:id="#+id/B"
android:onClick="BClick"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="B"
android:layout_below="#+id/DOS"
android:layout_centerHorizontal="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/score"
android:textColor="#color/colorAccent"
android:text="0"
android:textSize="32dp"
android:layout_below="#+id/LUL"
android:layout_centerHorizontal="true"
android:layout_marginTop="33dp" />
</RelativeLayout>
LAYOUT 2:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/question2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:background="#drawable/android"
tools:context="org.flinthill.finalprojectv3.MainActivity">
<TextView
android:layout_width="wrap_content"
android:id="#+id/question2text"
android:textColor="#color/LightGreen"
android:layout_height="wrap_content"
android:typeface="serif"
android:text="Who created Cisco"
android:layout_centerHorizontal="true"
android:layout_marginTop="32dp"
android:textSize="24sp"/>
<Button
android:id="#+id/Microsoft"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Microsoft"
android:layout_marginTop="100dp"
android:layout_below="#+id/question2text"
android:layout_centerHorizontal="true" />
<Button
android:id="#+id/LenBosackandSandyLerner"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Len Bosack and Sandy Lerner"
android:layout_below="#+id/Microsoft"
android:layout_centerHorizontal="true" />
<Button
android:id="#+id/HaskelDiklah"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Haskel Diklah"
android:layout_below="#+id/LenBosackandSandyLerner"
android:layout_centerHorizontal="true" />
<Button
android:id="#+id/SteveWozniak"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Steve Wozniak"
android:layout_below="#+id/HaskelDiklah"
android:layout_centerHorizontal="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/score"
android:textColor="#color/colorAccent"
android:text="1"
android:textSize="32dp"
android:layout_below="#+id/question2text"
android:layout_centerHorizontal="true"
android:layout_marginTop="33dp" />
</RelativeLayout>

//Change the name id in the xml file
Button microsoftButton = (Button) findViewById(R.id.microsoftButton);
TextView scoreTextView = (TextView) findViewById(R.id.scoreTextView);
microsoftButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(getApplicationContext(),"Wrong!", Toast.LENGTH_SHORT).show();
// This was declared above so now you can use it. You can only set it to a String not to an Integer.
scoreTextView.setText("0");
}
});

You cannot do this unless your TextView is within the layout your Activity, Fragment or Dialog controls.
The findViewById method looks for Views within the layout previously configured by the setContentView(layout) or the layout inflated in your Fragment or Dialog. If it does not find anything, your TextView will have a null reference.

TextView isn't updating in Android

I'm making a simple "novelty" app that counts how many sneezes are done, it's more of a fun app that builds up experience until I do my huge project during the summer. I have two buttons, one adds a sneeze and the other clears how many sneezes there currently are. It holds the highest number of sneezes that there were previously. The problem is, the TextViews never update, they only initialize to zero. I used a Toast.makeText() to make sure that the buttons are working (they are). Any help is appreciated. Thanks
Java code:
public class MainActivity extends ActionBarActivity {
private int record_number = 0;
private int current_number = 0;
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_main);
Button add_one = (Button) findViewById(R.id.addone);
Button clear_1 = (Button) findViewById(R.id.clear);
add_one.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
current_number += 1;
Toast.makeText(MainActivity.this, "Button Clicked " + current_number, Toast.LENGTH_SHORT).show();
}
});
clear_1.setOnClickListener(new OnClickListener() {
public void onClick(View v)
{
current_number = 0;
Toast.makeText(MainActivity.this, "Button Clicked", Toast.LENGTH_SHORT).show();
}
});
TextView rec_text = (TextView) findViewById(R.id.record_num);
TextView cur_text = (TextView) findViewById(R.id.current_num);
if (current_number >= record_number)
{
record_number = current_number;
}
rec_text.setText(String.valueOf(record_number));
cur_text.setText(String.valueOf(current_number));
}
}
XML:
<RelativeLayout 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:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
tools:context="com.michail.sneezecounter.MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Sneeze Counter"
android:id="#+id/title"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Record Number of Sneezes:"
android:id="#+id/textView"
android:layout_below="#+id/title"
android:layout_centerHorizontal="true"
android:layout_marginTop="72dp" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Add one Sneeze"
android:id="#+id/addone"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:layout_marginBottom="76dp"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Clear Current Number of Sneezes"
android:id="#+id/clear"
android:layout_marginBottom="13dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:id="#+id/record_num"
android:layout_below="#+id/textView"
android:layout_centerHorizontal="true"
android:singleLine="false" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Current Number of Sneezes:"
android:id="#+id/currentLabel"
android:layout_centerVertical="true"
android:layout_alignRight="#+id/textView"
android:layout_alignEnd="#+id/textView" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_below="#+id/currentLabel"
android:layout_alignLeft="#+id/record_num"
android:layout_alignStart="#+id/record_num"
android:layout_marginTop="21dp"
android:id="#+id/current_num" />
</RelativeLayout>

You need to update the text of the TextViews inside the onClickListeners. In fact, all your logic for counting, clearing, and recording the record needs to be done in your onClickListeners (or methods called by them). Right now you only do it once in onCreate, then never again. You can do this in onCreate:
final TextView cur_text = (TextView) findViewById(R.id.current_num);
add_one.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
current_number += 1;
cur_text.setText(Integer.toString(current_number);
}
});
And similar for the other TextView & onClickListener.

You only set the contents of your TextViews once. You should update them every time you get a click event. Specifically:
add_one.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
current_number += 1;
if (current_number >= record_number)
{
record_number = current_number;
rec_text.setText(String.valueOf(record_number));
}
cur_text.setText(String.valueOf(current_number));
}
});
clear_1.setOnClickListener(new OnClickListener() {
public void onClick(View v)
{
current_number = 0;
cur_text.setText(String.valueOf(current_number));
}
});
NOTE: if your variables current_number, record_number, cur_text, and rec_text aren't already declared as class member variables, you'll want to do that do that so that they're accessible once you leave the scope of the method you're doing all this in (I assume it's onCreate(...).

What you are going to need to do here is update the labels during the on click events of the button. You currently only update them on activity create. This doesn't execute every time there is a click. Can I answer any questions about the fixed up version below?
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.fragment_main);
final TextView rec_text = (TextView) findViewById(R.id.record_num);
final TextView cur_text = (TextView) findViewById(R.id.current_num);
Button add_one = (Button) findViewById(R.id.addone);
Button clear_1 = (Button) findViewById(R.id.clear);
add_one.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
current_number += 1;
if (current_number >= record_number)
record_number = current_number;
cur_text.setText(String.valueOf(current_number));
rec_text.setText(String.valueOf(record_number));
}
});
clear_1.setOnClickListener(new OnClickListener() {
public void onClick(View v)
{
current_number = 0;
cur_text.setText(String.valueOf(current_number));
rec_text.setText(String.valueOf(record_number));
}
});
cur_text.setText(String.valueOf(current_number));
rec_text.setText(String.valueOf(record_number));
}

App gets force close when clicked on imageview in android

I have a "Menu" imageview in all the pages of my app, if clicked on menu, all the menuitems like login, home, jobs, about will get open and If i click on "about" menuitem the app gets force close and getting null pointer exception on "OnClicklistener of menu" but other Menuitems are not having this issue, please can anybody solve this?
public class About extends Activity {
LinearLayout line1, line2;
ImageView menu;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_about);
menu.setOnClickListener(new View.OnClickListener() {
ImageView menu = (ImageView)findViewById(R.id.menu);
public void onClick(View v) {
menu.setVisibility(View.VISIBLE);
// TODO Auto-generated method stub
line1.setVisibility(View.VISIBLE);
if (line2.getVisibility() == View.INVISIBLE || line2.getVisibility() == View.GONE) {
line2.setVisibility(View.VISIBLE); }
else {
line2.setVisibility(View.INVISIBLE);
}
}
});
ImageView home = (ImageView) findViewById(R.id.home);
home.setOnClickListener(new View.OnClickListener() {
public void onClick(View v){
startActivity(new Intent(About.this, Home.class));
}
});
ImageView jobs = (ImageView) findViewById(R.id.jobs);
jobs.setOnClickListener(new View.OnClickListener() {
public void onClick(View v){
startActivity(new Intent(About.this, Jobs.class));
}
});
ImageView log = (ImageView) findViewById(R.id.log);
log.setOnClickListener(new View.OnClickListener() {
public void onClick(View v){
startActivity(new Intent(About.this, Login.class));
}
});
ImageView about = (ImageView) findViewById(R.id.about);
about.setOnClickListener(new View.OnClickListener() {
public void onClick(View v){
startActivity(new Intent(getApplicationContext(), About.class));
}
});
}
XML file
<RelativeLayout 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:background="#color/black" >
<LinearLayout
android:id="#+id/ll1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#color/black"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true">
<ImageView
android:id="#+id/menu"
android:layout_width="50dp"
android:layout_height="50dp"
android:src="#drawable/menu" />
</LinearLayout>
<LinearLayout
android:id="#+id/ll2"
android:layout_width="199dp"
android:layout_height="wrap_content"
android:background="#color/black"
android:layout_toRightOf="#+id/ll1"
android:visibility="gone"
>
<ImageView
android:id="#+id/about"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_above="#+id/textView1"
android:layout_toLeftOf="#+id/jobs"
android:src="#drawable/about" />
<ImageView
android:id="#+id/jobs"
android:layout_width="50dp"
android:layout_height="50dp"
android:src="#drawable/jobs" />
<ImageView
android:id="#+id/log"
android:layout_width="50dp"
android:layout_height="50dp"
android:src="#drawable/log" />
<ImageView
android:id="#+id/home"
android:layout_width="50dp"
android:layout_height="50dp"
android:src="#drawable/home" />
</LinearLayout>
<TextView
android:id="#+id/textView3"
android:layout_width="match_parent"
android:layout_height="50dip"
android:layout_alignParentBottom="true"
android:layout_alignParentLeft="true"
android:background="#color/white"
android:textColor="#color/white"/>
<TextView
android:id="#+id/textView4"
android:layout_width="match_parent"
android:layout_height="710dp"
android:layout_alignParentLeft="true"
android:layout_below="#+id/textView1"
android:layout_marginTop="46dp"
android:text="#string/AboutPage"
android:textColor="#color/white" />
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/ll1"
android:layout_centerHorizontal="true"
android:layout_marginTop="26dp"
android:text="#string/WelcometoRebuixcom"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#color/white" />

ImageView menu;
menu.setOnClickListener(new View.OnClickListener() {
ImageView menu = (ImageView)findViewById(R.id.menu);
Look at these code lines, the Second one is cause of Force Close, as menu is NULL.
Just interchange it like,
menu = (ImageView)findViewById(R.id.menu);
menu.setOnClickListener(new View.OnClickListener() {
Update:
You are declaring ImageView menu;
Now the second line, menu.setOnClickListener(new View.OnClickListener() {
without defining ImageView menu you are setting setOnCLickListener() to it, which cause NullPointerException.
So you have to define ImageView menu like menu = (ImageView)findViewById(R.id.menu); after declaring.
Just go through for basic Android Programming and Core Java tutorial for How to declare and define Objects and Member Variables. As I think you have poor programming concepts.

you should move the code
ImageView menu = (ImageView)findViewById(R.id.menu);
before
menu.setOnClickListener(new View.OnClickListener() {}

try this
ImageView menu = (ImageView)findViewById(R.id.menu);
menu.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {............
you should put
ImageView menu = (ImageView)findViewById(R.id.menu);
befor
menu.setOnClickListener

Initialize your imageview befor onclick listener as below:
ImageView menu = (ImageView)findViewById(R.id.menu); <<---- Here
menu.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
menu.setVisibility(View.VISIBLE);
// TODO Auto-generated method stub
line1.setVisibility(View.VISIBLE);
if (line2.getVisibility() == View.INVISIBLE || line2.getVisibility() == View.GONE) {
line2.setVisibility(View.VISIBLE); }
else {
line2.setVisibility(View.INVISIBLE);
}
}
});