Carry selected button values to next page

Carry selected button values to next page - android

I have 25 buttons in my layout xml file (called activity_button_page.xml); the code for 5 buttons is given below.
<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"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".ButtonPage" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="00"
android:id="#+id/ze1" />
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="25"
android:id="#+id/tf1"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="50"
android:id="#+id/fi1"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="25"
android:id="#+id/tf2"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="00"
android:id="#+id/ze2"/>
</LinearLayout>
</LinearLayout>
My objective is to have the user click up to 3 buttons, and I would like the sum of the values (given by the android:text code to appear on a textView (android:id="#+id/resulttextview") in the next page (activity_result_page.xml).
This is what I currently have in ButtonPage.java
package com.example.buttonfield;
import android.app.Activity;
import android.app.AlertDialog;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
public class ButtonPage extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_button_page);
Button ze1 = ((Button)this.findViewById(R.id.ze1));
ze1.setOnClickListener(this);
}
public void onClickListener(View v){
pressed=((Button)v).getText();
switch (v.getId()) {
case R.id.zero1:
pressed=zero1.getText().toString();
break;
//OR
case R.id.zero1:
pressed=R.id.zero1.getText().toString();
break;
}
new AlertDialog.Builder(this).setTitle("Info").setMessage(pressed).setNeutralButton("Okey", null).show();
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.button_page, menu);
return true;
}
}
What is the correct way to approach this? Thanks!

Basiclly you just need to get three button's text and add them as Integer. Then use intent extra to pass the value to whatever page you like.
// button page
Button submit = (Button)findViewById(R.id.submit);
submit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
int sum = Integer.parseInt(button1.getText()) +
Integer.parseInt(button2.getText()) +
Integer.parseInt(button3.getText());
Intent intent = new Intent(this, ResultActivity.class);
intent.putExtra("sum", sum);
startActivity(intent);
}
});
// result page
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_result_page);
Bundle bundle = getIntent().getExtras();
if(bundle != null) {
int sum = bundle.getInt("sum");
TextView textView = (TextView)findViewById(R.id.your_text_view);
textView.setText(Integer.toString(sum));
}
}

Related

Android Initial Login Screen then use fragments to swipe between screens once login is successful

I am trying to create an Android app, then has an initial login screen that detects if a user is Admin or User. Once logged in, the user (depending on their role) will see different tabs to swipe between. I have a basic app that starts with a login activity and the login to decipher the users roles (using static values for now). First part is ok. Now when I try to use Fragments after the login screen, I'm getting stuck.
I have a LoginActivity that has an onClikcListener on a button after user enters credentials. Depending on whether the user is Amin or General Users, it will just to a new activity either activity_vote_admin or activity_vote_user. At this point I am stuck. Any ideas if what I am trying to do is valid. Or is there a better way to do this. At the moment I am getting this error.
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.confidencevotefragmentrebuild/com.example.confidencevotefragmentrebuild.activity_vote_admin}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.setOnClickListener(android.view.View$OnClickListener)' on a null object reference.
LoginActivity (this is my main activity)
...
package com.example.confidencevotefragmentrebuild;
import android.content.Intent;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class LoginActivity extends AppCompatActivity {
private static EditText username;
private static EditText password;
public static TextView attempts;
private static Button submit_button;
int attempt_counter = 5;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
loginButton();
}
public void loginButton() {
username = (EditText) findViewById(R.id.editText);
password = (EditText) findViewById(R.id.editText2);
attempts = (TextView) findViewById(R.id.textView_Attempts);
//Reference button view
final Button submit_button = findViewById(R.id.submit_button);
// perform click event on button
submit_button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if (username.getText().toString().equals("admin") &&
password.getText().toString().equals("pass")) {
Toast.makeText(LoginActivity.this, "Welcome " + username.getText(),
Toast.LENGTH_SHORT).show();
Intent intent = new Intent(LoginActivity.this, activity_vote_admin.class);
startActivity(intent);
} else if (username.getText().toString().equals("user") &&
password.getText().toString().equals("pass")) {
Toast.makeText(LoginActivity.this, "Welcome " + username.getText(),
Toast.LENGTH_SHORT).show();
Intent intentUser = new Intent(LoginActivity.this, activity_vote_user.class);
startActivity(intentUser);
} else {
Toast.makeText(LoginActivity.this, "User or Password incorrect",
Toast.LENGTH_SHORT).show();
attempt_counter--;
attempts.setText(Integer.toString(attempt_counter));
if (attempt_counter == 0) {
Toast.makeText(LoginActivity.this, "Too many failed attempts, please close app and try again",
Toast.LENGTH_SHORT).show();
submit_button.setEnabled(false);
}
}
}
}
);
}
}
...
Activity_vote_admin
...
package com.example.confidencevotefragmentrebuild;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.RatingBar;
import android.widget.Spinner;
import android.widget.Toast;
import androidx.appcompat.app.AppCompatActivity;
import androidx.viewpager.widget.ViewPager;
public class activity_vote_admin extends AppCompatActivity {
/**
* Field for selecting the number of confidence votes
*/
RatingBar mResults;
private RatingBar rBar;
Button mBtn;
/**
* Spinner field to enter the project name
*/
private Spinner mProjectSpinner;
/**
* Projects. The possible values are:
* stored locally - Needs to get values from a database. TODO
*/
int mProject = 0;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_vote_main_admin);
// Find the view pager that will allow the user to swipe between fragments
ViewPager viewPager = (ViewPager) findViewById(R.id.viewpager);
// Create an adapter that knows which fragment should be shown on each page
AdminFragmentPagerAdapter adapter = new AdminFragmentPagerAdapter(getSupportFragmentManager());
// Set the adapter onto the view pager
viewPager.setAdapter(adapter);
// initiate a rating bar
rBar = findViewById(R.id.rating_bar);
//float vote = rBar.getRating();
// Find all relevant views for user input
mResults = findViewById(R.id.rating_bar);
mProjectSpinner = findViewById(R.id.spinner_project);
// Run getRating method to get rating number from a rating bar
//getRating();
// Initiate button
mBtn = findViewById(R.id.voteButton);
// perform click event on button
mBtn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// get values and then displayed in a toast
//String totalStars = "Total Stars:: " + RatingBar.getNumStars();
float vote = rBar.getRating();
String rating = "Rating : " + vote;
Toast.makeText(getApplicationContext(), rating + "\n", Toast.LENGTH_LONG).show();
}
});
projectSpinner();
}
// Setup the dropdown spinner that allows the user to select the role.
private void projectSpinner() {
// Create adapter for spinner. The list options are from the String array it will use
// the spinner will use the default layout
ArrayAdapter projectSpinnerAdapter = ArrayAdapter.createFromResource(this,
R.array.projects, android.R.layout.simple_spinner_item);
// Specify dropdown layout style - simple list view with 1 item per line
projectSpinnerAdapter.setDropDownViewResource(android.R.layout.simple_dropdown_item_1line);
// Apply the adapter to the project spinner
mProjectSpinner.setAdapter(projectSpinnerAdapter);
// Set the integer mSelected to the constant values
mProjectSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
#Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String selection = (String) parent.getItemAtPosition(position);
if(mProjectSpinner.getSelectedItem() == "This is Hint Text");
if (!TextUtils.isEmpty(selection)) {
if (selection.equals(getString(R.string.nextGEMS1_5))) {
mProject = 0 ;
return;
} else if (selection.equals(getString(R.string.nextGEMS1_6))) {
mProject = 1;
return;
} else if (selection.equals(getString(R.string.nextGEMS1_7))) {
mProject = 2;
return;
} else if (selection.equals(getString(R.string.nextGEMS1_8))) {
mProject = 3;
return;
} else if (selection.equals(getString(R.string.nextGEMS1_9))) {
mProject = 4;
return;
}
else mProject = 0;
}
}
// Because AdapterView is an abstract class, onNothingSelected must be defined
#Override
public void onNothingSelected(AdapterView<?> parent) {
mProject = 0; // User
}
});
}
}
...
activity_vote_main_admin.xml
...
<?xml version="1.0" encoding="utf-8"?>
<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">
<androidx.viewpager.widget.ViewPager
android:name="com.example.confidencevotefragmentrebuild.testFragment1"
android:id="#+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
...
activity_login.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"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
tools:context=".LoginActivity"
tools:showIn="#layout/activity_login">
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#5fb0c9"
android:orientation="vertical"
android:scrollbarAlwaysDrawVerticalTrack="true">
<TextView
android:id="#+id/login_title"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="16dp"
android:layout_marginTop="16dp"
android:gravity="center_horizontal"
android:text="LOGIN"
android:textColor="#fff"
android:textSize="20sp"
android:textStyle="bold" />
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="500dp"
android:background="#ffffff"
android:elevation="4dp"
android:orientation="vertical"
android:padding="20dp"
android:layout_below="#+id/login_title"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="80dp">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="450dp"
android:orientation="vertical"
android:paddingTop="30dp">
<com.google.android.material.textfield.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="70dp">
<EditText
android:id="#+id/editText"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:drawableLeft="#drawable/usericon"
android:hint="User Name"
android:inputType="textEmailAddress"
android:maxLines="1" />
</com.google.android.material.textfield.TextInputLayout>
<com.google.android.material.textfield.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:id="#+id/editText2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:drawableLeft="#drawable/lock"
android:hint="Password"
android:inputType="textPassword"
android:maxLines="1" />
</com.google.android.material.textfield.TextInputLayout>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:paddingTop="5dp"
android:text="Forgot Password?" />
<Button
android:id="#+id/submit_button"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="22dp"
android:background="#drawable/action_buttom"
android:text="Sign in"
android:textAllCaps="false"
android:textColor="#fff"
android:textSize="18sp" />
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="20dp"
android:orientation="horizontal"
android:paddingTop="1dp">
<TextView
android:id="#+id/attempts_text"
android:layout_width="wrap_content"
android:layout_height="25dp"
android:layout_gravity="center_horizontal"
android:paddingTop="1dp"
android:text="Number of attempts remaining: " />
<TextView
android:id="#+id/textView_Attempts"
android:layout_width="match_parent"
android:layout_height="25dp"
android:layout_gravity="center_horizontal"
android:paddingTop="1dp"
android:text="5" />
</LinearLayout>
<TextView
android:id="#+id/lnkRegister"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="1dp"
android:gravity="center"
android:paddingTop="30dp"
android:text="Register here"
android:textColor="#5fb0c9"
android:textSize="16sp" />
</LinearLayout>
</RelativeLayout>
<ImageButton
android:id="#+id/conferencevote_logo"
android:layout_width="210dp"
android:layout_height="180dp"
android:layout_below="#+id/login_title"
android:layout_centerHorizontal="true"
android:layout_marginTop="2dp"
android:elevation="4dp"
android:background="#drawable/rounded_button"
android:src="#drawable/confvotenew"
/>
</RelativeLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
...
AdminFragemntyPagerAdapter
...
package com.example.confidencevotefragmentrebuild;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentPagerAdapter;
public class AdminFragmentPagerAdapter extends FragmentPagerAdapter {
public AdminFragmentPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
if (position == 0) {
return new testFragment1();
} else if (position == 1) {
return new testFragment2();
} else {
return new testFragment2();
}
}
#Override
public int getCount() {
return 3;
}
}
...
aactivity_vote_user.xml
...
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#5fb0c9"
android:orientation="vertical"
android:scrollbarAlwaysDrawVerticalTrack="true">
<TextView
android:id="#+id/vote_title"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="16dp"
android:layout_marginTop="16dp"
android:gravity="center_horizontal"
android:text="USER VOTE"
android:textColor="#fff"
android:textSize="20sp"
android:textStyle="bold"/>
<RelativeLayout
android:layout_width="wrap_content"
android:layout_height="500dp"
android:background="#ffffff"
android:elevation="4dp"
android:orientation="vertical"
android:padding="20dp"
android:layout_below="#+id/vote_title"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_marginTop="80dp">
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="450dp"
android:orientation="vertical"
android:paddingTop="70dp">
<com.google.android.material.textfield.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp">
<Spinner
android:id="#+id/spinner_project"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="20dp"
android:layout_marginLeft="25dp"
android:layout_marginRight="25dp"
android:hint="#string/spinner_hint"
android:maxLines="1"
android:singleLine="true"
android:backgroundTint="#color/attCobalt"
android:popupBackground="#color/myBlue"
android:dropDownSelector="#color/attBlue"
/>
</com.google.android.material.textfield.TextInputLayout
>
<com.google.android.material.textfield.TextInputLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center">
<RatingBar
android:id="#+id/rating_bar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:stepSize="1.0"
android:layout_marginTop="40dp"
android:theme="#style/rating_bar"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:paddingTop="5dp"
android:text="Vote and Submit" />
<FrameLayout
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior" />
</com.google.android.material.textfield.TextInputLayout>
<Button
android:id="#+id/voteButton"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="22dp"
android:background="#drawable/action_buttom"
android:text="Submit"
android:textAllCaps="false"
android:textColor="#fff"
android:textSize="18sp" />
/>
</LinearLayout>
<com.google.android.material.bottomnavigation.BottomNavigationView
android:layout_width="match_parent"
android:layout_height="match_parent" />
</RelativeLayout>
<ImageButton
android:id="#+id/conferencevote_logo"
android:layout_width="210dp"
android:layout_height="180dp"
android:layout_below="#+id/login_title"
android:layout_centerHorizontal="true"
android:layout_marginTop="55dp"
android:elevation="4dp"
android:background="#drawable/rounded_button"
android:src="#drawable/confvotenew"
/>
</RelativeLayout>
...
My fragments are as follows.
...
package com.example.confidencevotefragmentrebuild;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
public class testFragment1 extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.activity_vote_user, container, false);
}
}
...

There are two reason for this issue :
You didn't declare any button on "activity_vote_main_admin.xml", thats why your view not binding with activity and giving null pointer exception.
May be you declare the button on fragment xml and trying to bind it with activity.

How to enable\disable dialog views dynamically

I need your help. my dialog window has 2 radiobuttons. I want to disable or enable some views on this dialog depending on which radiobutton is checked by a user.
my Layout for dialog: inc_dialog.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<EditText
android:id="#+id/inc_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="4dp"
android:layout_marginLeft="4dp"
android:layout_marginRight="4dp"
android:layout_marginTop="16dp"
android:hint="Название дохода"
/>
<EditText
android:id="#+id/inc_value"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="16dp"
android:layout_marginLeft="4dp"
android:layout_marginRight="4dp"
android:layout_marginTop="4dp"
android:hint="Сумма дохода"
/>
<TextView
android:id="#+id/tvChkBoxIncType"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="6dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="4dp"
android:layout_marginTop="4dp"
android:text="Тип дохода:" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<RadioGroup
android:id="#+id/RadioGroup1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<RadioButton
android:id="#+id/inc_random"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="6dp"
android:onClick="onRadioButtonClicked"
android:text="Разовый" />
<RadioButton
android:id="#+id/inc_const"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="9dp"
android:checked="true"
android:onClick="onRadioButtonClicked"
android:text="Постоянный" />
</RadioGroup>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/DataPick1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:layout_marginLeft="16dp"
android:text="Начало периода:"
android:enabled="false"/>
<EditText
android:id="#+id/inc_day"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="DD"
android:enabled="false" >
</EditText>
<EditText
android:id="#+id/inc_month"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="MM"
android:enabled="false">
</EditText>
<EditText
android:id="#+id/inc_year"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:enabled="false"
android:text="YYYY" >
</EditText>
</LinearLayout>
<EditText
android:id="#+id/inc_period"
android:layout_width="wrap_content"
android:enabled="false"
android:layout_height="wrap_content"
android:layout_marginBottom="4dp"
android:layout_marginLeft="4dp"
android:layout_marginRight="4dp"
android:text="Каждые Х дней" >
</EditText>
</LinearLayout>
Building of this Dialog:
protected Dialog onCreateDialog(int id) {
AlertDialog.Builder adb = new AlertDialog.Builder(this);
adb.setTitle("Добавить доход");
view = (LinearLayout) getLayoutInflater()
.inflate(R.layout.inc_dialog, null);
// устанавливаем ее, как содержимое тела диалога
adb.setView(view) .setPositiveButton("Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
}) .setNegativeButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Toast.makeText(getApplicationContext(),"Добавлено", Toast.LENGTH_SHORT).show();
}
}); ;
return adb.create();
}
onClick function that I call in ACTIVITY
public void onRadioButtonClicked (){
switch(view.getId()) {
case R.id.inc_const:
findViewById(R.id.DataPick1).setEnabled(true);
break;
case R.id.inc_random:
findViewById(R.id.DataPick1).setEnabled(false);
break;
}
};
If it's needed the whole Activity code. Income.java
package com.example.pocketbooker;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View.OnClickListener;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
public class Income extends Activity{
LinearLayout view;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTitle("Доходы");
setContentView(R.layout.income_const);
}
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu items for use in the action bar
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.inoutgo, menu);
return super.onCreateOptionsMenu(menu);
}
protected Dialog onCreateDialog(int id) {
AlertDialog.Builder adb = new AlertDialog.Builder(this);
adb.setTitle("Добавить доход");
view = (LinearLayout) getLayoutInflater()
.inflate(R.layout.inc_dialog, null);
// устанавливаем ее, как содержимое тела диалога
adb.setView(view) .setPositiveButton("Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
}) .setNegativeButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Toast.makeText(getApplicationContext(),"Добавлено", Toast.LENGTH_SHORT).show();
}
}); ;
return adb.create();
}
public boolean onOptionsItemSelected(MenuItem item) {
// Handle presses on the action bar items
switch (item.getItemId()) {
case R.id.plus:
showDialog(1);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
public void onRadioButtonClicked (){
switch(view.getId()) {
case R.id.inc_const:
findViewById(R.id.DataPick1).setEnabled(true);
break;
case R.id.inc_random:
findViewById(R.id.DataPick1).setEnabled(false);
break;
}
};
}
So I want to change a property of a view in my dialog dynamically. How can I do that? How can I call dialog views from my Activity function?
And sorry for my english, I'm from kazakhstan.
Please, help.

Because DataPicker is inside Dialog layout so you need to pass user selected RadioButton id in onCreateDialog method. try it as:
protected Dialog onCreateDialog(int id) {
RadioGroup radioGroup = (RadioGroup) findViewById(R.id.RadioGroup1);
AlertDialog.Builder adb = new AlertDialog.Builder(this);
adb.setTitle("Добавить доход");
view = (LinearLayout) getLayoutInflater()
.inflate(R.layout.inc_dialog, null);
int radioBtnid = radioGroup.getCheckedRadioButtonId();
// get DatePicker
DatePicker datepick1=(DatePicker)view.findViewById(R.id.DataPick1);
if(radioBtnid==R.id.inc_const){
//Enable DataPick1
datepick1.setEnabled(true);
}else if(radioBtnid==R.id.inc_random){
// Disable DataPick1
datepick1.setEnabled(false);
}
//your code ...
}

First of all pass in the View as argument to your onRadioButtonClicked() method since it is necessary for onClick method mentioned in XML layout.
Define a View as its only parameter (this will be the View that was clicked)
Also Check if the view that was passed is whether selected or not by calling isChecked() method. Your final code might look like below:
public void onRadioButtonClicked(View view) {
// Is the button now checked?
boolean checked = ((RadioButton) view).isChecked();
// Check which radio button was clicked
switch(view.getId()) {
case R.id.inc_const:
if (checked)
// Do the necessary things here if inc_const is selected
findViewById(R.id.DataPick1).setEnabled(true);
break;
case R.id.inc_random:
if (checked)
// Put the code necessary if the random is checked
findViewById(R.id.DataPick1).setEnabled(false);
break;
}
}
Let me know if this helps.

So I've made it.
I used DialogFragment
Created separate class Dialog_inc.java for my dialog
package com.example.pocketbooker;
import android.annotation.SuppressLint;
import android.app.DialogFragment;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.EditText;
#SuppressLint("NewApi")
public class Dialog_inc extends DialogFragment implements OnClickListener {
EditText POLE;
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
getDialog().setTitle("Добавить Доход");
View v = inflater.inflate(R.layout.inc_dialog, null);
v.findViewById(R.id.btnYes).setOnClickListener(this);
v.findViewById(R.id.btnNo).setOnClickListener(this);
v.findViewById(R.id.inc_const).setOnClickListener(this);
v.findViewById(R.id.inc_random).setOnClickListener(this);
POLE=(EditText) v.findViewById(R.id.inc_year);
return v;
}
public void onClick(View v) {
switch(v.getId())
{case R.id.inc_const:
POLE.setEnabled(true);
break;
case R.id.inc_random:
POLE.setEnabled(false);
break;
default:
dismiss();}
}
public void onDismiss(DialogInterface dialog) {
super.onDismiss(dialog);
}
public void onCancel(DialogInterface dialog) {
super.onCancel(dialog);
}
}
A bit changed my layout for this, added 2 buttons. inc_dialog.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<EditText
android:id="#+id/inc_name"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="4dp"
android:layout_marginLeft="4dp"
android:layout_marginRight="4dp"
android:layout_marginTop="16dp"
android:hint="Название дохода"
android:inputType="textEmailAddress" />
<EditText
android:id="#+id/inc_value"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="16dp"
android:layout_marginLeft="4dp"
android:layout_marginRight="4dp"
android:layout_marginTop="4dp"
android:hint="Сумма дохода"
android:inputType="text" />
<TextView
android:id="#+id/tvChkBoxIncType"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="6dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="4dp"
android:layout_marginTop="4dp"
android:text="Тип дохода:" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<RadioGroup
android:id="#+id/RadioGroup1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal" >
<RadioButton
android:id="#+id/inc_random"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="6dp"
android:onClick="OnRadio"
android:text="Разовый" />
<RadioButton
android:id="#+id/inc_const"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="9dp"
android:onClick="OnRadio"
android:checked="true"
android:text="Постоянный" />
</RadioGroup>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/DataPick1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:layout_marginLeft="16dp"
android:text="Начало периода:"
/>
<EditText
android:id="#+id/inc_day"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="DD" >
</EditText><EditText
android:id="#+id/inc_month"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="MM"
>
</EditText><EditText
android:id="#+id/inc_year"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="YYYY" >
</EditText>
</LinearLayout>
<EditText
android:id="#+id/inc_period"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="4dp"
android:layout_marginLeft="4dp"
android:layout_marginRight="4dp"
android:onClick="onRadioButtonClicked"
android:text="Каждые Х дней" >
</EditText>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<Button
android:id="#+id/btnYes"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:text="yes">
</Button>
<Button
android:id="#+id/btnNo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:text="no">
</Button>
</LinearLayout>
</LinearLayout>
And I call this dialog like this. Income.class
package com.example.pocketbooker;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.DialogFragment;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.LinearLayout;
public class Income extends Activity{
LinearLayout view;
DialogFragment dlg1;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTitle("Доходы");
setContentView(R.layout.income_const);
dlg1 = new Dialog_inc();
}
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu items for use in the action bar
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.inoutgo, menu);
return super.onCreateOptionsMenu(menu);
}
#SuppressLint("NewApi")
public boolean onOptionsItemSelected(MenuItem item) {
// Handle presses on the action bar items
switch (item.getItemId()) {
case R.id.plus:
dlg1.show(getFragmentManager(), "dlg1");
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
Of course it's not a beautiful code now. But I hope it can help someone. Thanks everyone for responding

Android Button Doing Opposite of Command

So I just started using the Android Development kit and learned how to create buttons and get them to work. To test what I know I made a simple app that displays "correct" if you click the button on the right and "idiot" if you click the one on the left. Everything is working other than the fact that it's displaying the opposite message for the button clicked.
Here is my xml code:
<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:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<TextView
android:id="#+id/textv1"
android:layout_width="149dp"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="57dp"
android:text="Click the Right Button" />
<Button
android:id="#+id/left"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/textv1"
android:layout_marginTop="29dp"
android:layout_toLeftOf="#+id/textv1" />
<Button
android:id="#+id/right"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/left"
android:layout_alignBottom="#+id/left"
android:layout_toRightOf="#+id/textv1" />
Here is my Java code:
package com.clicktherightbutton;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
public class MainActivity extends Activity {
Button rightb;
Button leftb;
TextView Display;
String yes = "Correct!!!";
String no = "Idiot!!!";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
rightb=(Button)findViewById(R.id.right);
leftb=(Button)findViewById(R.id.left);
Display=(TextView)findViewById(R.id.textv1);
rightb.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v)
{
// TODO Auto-generated method stub
if(rightb.isPressed())
Display.setText(yes);
rightb.setEnabled(false);
leftb.setEnabled(false);
}
});
leftb.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v)
{
// TODO Auto-generated method stub
if(leftb.isPressed())
Display.setText(no);
rightb.setEnabled(false);
leftb.setEnabled(false);
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
I understand if I switch "left" and "right" the buttons will do as I want but I want to know why it's doing the opposite of what I coded it to do? Is something wrong with my code?
Thank you

Change your layout to:
<TextView
android:id="#+id/textv1"
android:layout_width="149dp"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="57dp"
android:text="Click the Right Button" />
<Button
android:id="#+id/left"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#id/textv1"
android:layout_marginTop="29dp"
android:layout_toLeftOf="#id/textv1" />
<Button
android:id="#+id/right"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#id/left"
android:layout_alignBottom="#id/left"
android:layout_toRightOf="#id/textv1" />
You can only declare #+id once - it creates a variable. Later use #id to reference the same variable.

Unable to start activity with the click of an image button

I have made a custom theme for my action bar so that it displays three buttons on the top of the screen. With the click of the leftmost button, I want to start a new activity. However, I am unable to do so. I have used the correct method to start an activity and I am still getting an error. I don't know what the problem is.
The code I have written so far.
MainActivity.java
package com.example.contactmanager1;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ImageButton;
import android.widget.ListAdapter;
import android.widget.ListView;
public class MainActivity extends Activity {
private ListView listView;
private ImageButton button1;
private ImageButton button2;
private ImageButton button3;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
getActionBar().setDisplayShowTitleEnabled(false);
getActionBar().setHomeButtonEnabled(false);
getActionBar().setDisplayShowCustomEnabled(true);
getActionBar().setCustomView(R.layout.button_layout);
getActionBar().setDisplayShowHomeEnabled(false);
listView = (ListView)findViewById(R.id.main_contact_listview);
button1= (ImageButton)findViewById(R.id.button_search);
button2= (ImageButton)findViewById(R.id.button_addcontact);
button3= (ImageButton)findViewById(R.id.button_options);
setUpListView();
}
private void setUpListView(){
List <String> displayList = new ArrayList<String>();
displayList.add("Display Item 1");
displayList.add("Display Item 2");
displayList.add("Display Item 3");
ListAdapter listAdapter = new ArrayAdapter<String>(MainActivity.this,
android.R.layout.simple_list_item_1,displayList);
listView.setAdapter(listAdapter);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
return true;
}
public boolean onOptionsItemSelected(MenuItem item){
//Handle presses on the action bar items
switch(item.getItemId()){
case R.id.action_button_groups:
Intent intent = new Intent(this,Groups.class);
startActivity(intent);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
public void addContact(View view){
Intent intent = new Intent(this,AddContact.class);
startActivity(intent);
}
public void groupPage(View view){
Intent intent = new Intent(this,Groups.class);
startActivity(intent);
}
}
button_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:gravity="center"
android:background="#android:color/holo_blue_dark"
android:padding="5dp"
android:layout_weight="1">
<ImageButton
android:id="#+id/action_button_groups"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/groups"
android:onClick="groupPage" />
</LinearLayout>
<View
android:layout_width="1dp"
android:layout_height="match_parent"
android:background="#android:color/white"/>
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:gravity="center"
android:background="#android:color/holo_blue_dark"
android:padding="5dp"
android:layout_weight="1">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/contactlist" />
</LinearLayout>
<View
android:layout_width="1dp"
android:layout_height="match_parent"
android:background="#android:color/white"/>
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:gravity="center"
android:background="#android:color/holo_blue_dark"
android:padding="5dp"
android:layout_weight="1">
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/favourites" />
</LinearLayout>
</LinearLayout>
</FrameLayout>
For the first image button in button_layout.xml I have added a onClick attribute to which points to the method groupPage. I have defined this method in MainActivity.java.

listView with a imagebutton causes problem as it consumes all touches to it.so try replacing the imagebutton with imageView or try this link.try this link

How to switch between activities/screens in Android

my first Activity Xm
<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="#a5c63b"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<Button
android:id="#+id/btn1"
android:layout_width="match_parent"
android:layout_height="70dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="70dp"
android:background="#434d23"
android:text="Ok To Continue"
android:onClick="frontt"
android:textColor="#a5c63b" />
<ImageView
android:id="#+id/imageView11"
android:layout_width="250dp"
android:layout_height="250dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:src="#drawable/question" />
<TextView
android:id="#+id/txtview11"
android:layout_width="match_parent"
android:layout_height="20dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:text="Loading..."
android:textSize="12dp" />
</RelativeLayout>
This is my Second Activity 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:background="#a5c63b"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<Button
android:id="#+id/btn"
android:layout_width="match_parent"
android:layout_height="70dp"
android:onClick="onClick"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="70dp"
android:background="#434d23"
android:text="OK"
android:textColor="#a5c63b" />
<EditText
android:id="#+id/txtedit"
android:layout_width="match_parent"
android:layout_height="20dp"
android:layout_alignLeft="#+id/button1"
android:layout_alignParentTop="true"
android:layout_marginTop="50dp"
android:background="#edf2db"
android:ems="10"
android:inputType="numberDecimal" />
<ImageView
android:id="#+id/imageView1"
android:layout_width="250dp"
android:layout_height="250dp"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:src="#drawable/question" />
<TextView
android:id="#+id/txtview"
android:layout_width="match_parent"
android:layout_height="20dp"
android:layout_alignBottom="#+id/txtedit"
android:layout_alignLeft="#+id/txtedit"
android:layout_marginBottom="21dp"
android:text="Guess Single Digit Number"
android:textSize="12dp" />
<TextView
android:id="#+id/txtview2"
android:layout_width="match_parent"
android:layout_height="20dp"
android:layout_alignLeft="#+id/btn"
android:layout_below="#+id/btn"
android:text="TextView" />
</RelativeLayout>
this is my first java file code
package com.example.game;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.widget.Button;
public class MainActivity extends Activity {
MediaPlayer btnsound;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.front);
Button next = (Button) findViewById(R.id.btn1);
btnsound = MediaPlayer.create(MainActivity.this,R.raw.game);
btnsound.start();
next.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
Intent nextScreen = new Intent(getApplicationContext(), CopyOfMainActivity.class);
startActivity(nextScreen);
//finish();
}
} );
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
this is my Second java file
package com.example.game;
import java.util.Random;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.app.Activity;
import android.view.Menu;
public class CopyOfMainActivity extends Activity {
MediaPlayer btnsound;
Random random = new Random();
int randnumber = random.nextInt(10);
Button b2;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnsound = MediaPlayer.create(CopyOfMainActivity.this,R.raw.game);
btnsound.start();
b2= (Button) findViewById(R.id.btn);
b2.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
EditText input = (EditText)findViewById(R.id.txtedit);
TextView resultText = (TextView) findViewById(R.id.txtview2);
String inputstring = input.getText().toString();
int number = Integer.parseInt(inputstring);
if(randnumber==number)
{
resultText.setText("you win" );
ImageView image = (ImageView) findViewById(R.id.imageView1);
image.setImageResource(R.drawable.win);
}
else if (number>randnumber)
{
resultText.setText("you guess high number" );
ImageView image = (ImageView) findViewById(R.id.imageView1);
image.setImageResource(R.drawable.tryagain);
}
else if (number<randnumber)
{
resultText.setText("you guess low number" );
ImageView image = (ImageView) findViewById(R.id.imageView1);
image.setImageResource(R.drawable.lose);
}
}
} );
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
I have one button on First Activity xml layout .The first Activity Layout display after run application but whenever i click on button on first xml first want to go on next laytout after clicking then this error show in LogCat tab and application stop working.
AndroidRuntime at dalvik.system.NativeStart.main(Native Method)
what i should do?

The right way to do this given below:
next.setOnClickListener(new OnClickListener()
{
public void onClick(View v)
{
Intent nextScreen = new Intent(MainActivity.this, CopyOfMainActivity.class);
startActivity(nextScreen);
//finish();
}
} );
Hope this will work fine.

Please add your both activities to Manifest file if you missed out.
<application>
<activity android:name="Activity1">
</activity>
<activity android:name="Activity2">
</activity>

public void butt591(View v) {
v.startAnimation(fivenineclick);
Button but591 = (Button) findViewById(R.id.button591);
but591.setBackgroundColor(Color.parseColor("#ee4035"));
Intent bu591 = new Intent();
bu591.setClass(this, level5q10.class);
startActivity(bu591);
finish();
}
hey, i copy pasted a part of code in my app here 591 denotes level 5 ninth question and on selecting first option
that is wrong answer so on clicking the option it will set background to #ee4035 which is red color and when the user presses this option it will switch to level 5q10
I hope you understood from this code

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