How can i exit my app on menu item click?

How can i exit my app on menu item click? - android

How can i exit my app on navbar menu item click . I have used navbar for other tasks but i am slightly confused about exiting the app directly on item click
switch (menuItem.getItemId()) {
case R.id.nav_home:
break;
case R.id.nav_delete:
TODOViewModel.deleteAllTasks();
Toast.makeText(this, "All TODOs Deleted", Toast.LENGTH_SHORT).show();
return true;
case R.id.nav_logout:
Intent intent = new Intent(MainActivity.this, ActivityLogin.class);
startActivity(intent);
finish();
break;
case R.id.nav_exit:
default:
}

Use finish() or System.exit(0).

This is the XML File used
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:layout_width="fill_parent"
android:layout_height="wrap_content" android:id="#+id/txt1" android:text="txt1" />
<TextView android:layout_width="fill_parent"
android:layout_height="wrap_content" android:id="#+id/txt2" android:text="txt2"/>
<Button android:layout_width="fill_parent"
android:layout_height="wrap_content" android:id="#+id/btn1"
android:text="Close App" />
</LinearLayout>
The Java file
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class testprj extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button btn1 = (Button) findViewById(R.id.btn1);
btn1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
finish();
System.exit(0);
}
});
}
}

Related

android app automatically close after clicking in listview

I have slider app,on sliding using left button there will be a listview, on clicking list view there should open second activity.i used Intent for that but my android app automatically close after clicking in listview.
MainActivity.java
package com.example.slide_menu;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import com.navdrawer.SimpleSideDrawer;
public class MainActivity extends Activity {
SimpleSideDrawer slide_me;
Button left_button, right_button;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
slide_me = new SimpleSideDrawer(this);
slide_me.setLeftBehindContentView(R.layout.left_menu);
slide_me.setRightBehindContentView(R.layout.right_menu);
left_button = (Button) findViewById(R.id.left_buton);
right_button = (Button) findViewById(R.id.right_buton);
left_button.setOnClickListener(new View.OnClickListener() {
private ListView l1;
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
slide_me.toggleLeftDrawer();
l1=(ListView)findViewById(R.id.listView1);
l1.setAdapter(new ArrayAdapter<String>(MainActivity.this,android.R.layout.simple_list_item_1,getResources().getStringArray(R.array.dataelements)));
l1.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent,
View view, int position, long id) {
// TODO Auto-generated method stub
switch(position){
case 0: Intent newActivity0 = new Intent(MainActivity.this,Lone.class);
startActivity(newActivity0);
break;
// case 1: Intent newActivity1 = new Intent(MainActivity.this,Maruti.class);
// startActivity(newActivity1);
// break;
// case 2: Intent newActivity = new Intent(this, olympiakos.class);
// startActivity(newActivity);
// break;
// case 3: Intent newActivity = new Intent(this, karaiskaki.class);
// startActivity(newActivity);
// break;
// case 4: Intent newActivity = new Intent(this, reservetickets.class);
// startActivity(newActivity);
// break;
}
}
});
}
});
right_button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
slide_me.toggleRightDrawer();
}
});
}
}
left_menu
<?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:background="#ffffff"
android:orientation="vertical" >
<TextView
android:id="#+id/textView1"
android:layout_width="260dp"
android:layout_height="wrap_content"
android:gravity="center"
android:text="Left Menu"
android:textColor="#000000" />
<ListView
android:id="#+id/listView1"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ListView>
</LinearLayout>
String.xml
<resources>
<string name="app_name">slide_menu</string>
<string name="hello_world">Hello world!</string>
<string name="menu_settings">Settings</string>
<string name="title_activity_main">Slide Demo</string>
<string-array name="dataelements">
<item>one</item>
<item>two</item>
<item>three</item>
<item>four</item>
<item>five</item>
</string-array>
</resources>
Lone.java(mysecondactivityfile)
package com.example.slide_menu;
import android.app.Activity;
import android.os.Bundle;
public class Lone extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.lo);
}
}
Lo.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" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="lone scond"
android:textAppearance="?android:attr/textAppearanceLarge" />

Button not working in android app?

I'm building an app which has 3 functions a converter, a calculator and a notes section. When I click on the converter button on the home page it brings me to the converter activity / page. But when I click on the calculator button on the home page it won't open. Here is the code below. Any reason as to why? Thanks in advance.
MainActivity
package com.qub.buildersbuddy;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class MainActivity extends Activity {
Button buttonConverter;
Button buttonCalculator;
Button buttonNotePad;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button ConvertBtn = (Button) findViewById(R.id.butonConverter);
ConvertBtn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,CentInch.class);
startActivity(intent);
}
});
}
public void setupConverterButton(){
buttonConverter = (Button) findViewById(R.id.butonConverter);
// Button messageButton = (Button) findViewById(R.id.butonConverter);
}
public void CentToInch(){
buttonConverter.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//opening the
try{
Class centClass = Class
.forName("com.qub.buildersbuddy.CentInch");
Intent myintent = new Intent(MainActivity.this,centClass);
startActivity(myintent);
}catch (ClassNotFoundException e){
e.printStackTrace();
}
}
});
}
protected void onCreate1(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button CalcBtn = (Button) findViewById(R.id.buttonCalc);
CalcBtn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,Calculator.class);
startActivity(intent);
}
});
}
public void setupCalculatorButton(){
buttonCalculator = (Button) findViewById(R.id.buttonCalc);
// Button messageButton = (Button) findViewById(R.id.butonConverter);
}
public void Calculator(){
buttonCalculator.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//opening the
try{
Class calcClass = Class
.forName("com.qub.buildersbuddy.Calculator");
Intent myintent = new Intent(MainActivity.this,calcClass);
startActivity(myintent);
}catch (ClassNotFoundException e){
e.printStackTrace();
}
}
});
}
}
activity_main:
<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=".CentInch" >
<Button
android:id="#+id/butonConverter"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="62dp"
android:text="Converter" />
<Button
android:id="#+id/buttonCalc"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/butonConverter"
android:layout_centerHorizontal="true"
android:layout_marginTop="28dp"
android:text="Calculator" />
<Button
android:id="#+id/buttonNotes"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/buttonCalc"
android:layout_centerHorizontal="true"
android:layout_marginTop="31dp"
android:text="Notes" />
</RelativeLayout>

Is this the exact code you're using? Your #onCreate1 method will never get called. #onCreate gets called because it overrides a method from the class you extended (Activity), and something in Activity calls the method when the activity first starts. Move your calculator button logic into the first #onCreate method.

check if the right radioButton is checked and calculate the score

i have an android application that display a flag and group of radio buttons that each time the user check any radio button the application will display a button that allow to go to the next page using intent .
what i need is that each time the user check the right answer the system must calculate its score until the application finish .
the score will start by 0/0 and will finish after four rounds.
for now i need just to display the score of the user in the second page
i will appreciate any help
MainActivity.java
package com.devleb.flagology;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.Toast;
public class MainActivity extends Activity {
Button btnS;
RadioGroup rdgS;
RadioButton rdS1, rdS2, rdS3, rdS4;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
rdgS = (RadioGroup) findViewById(R.id.rdg1);
rdgS.setOnCheckedChangeListener(new OnCheckedChangeListener() {
#Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
if(rdS1.isChecked()||rdS2.isChecked()||rdS3.isChecked()||rdS4.isChecked()){
btnS.setVisibility(View.VISIBLE);
}
}
});
rdS1 = (RadioButton) findViewById(R.id.rd_s1);
rdS2 = (RadioButton) findViewById(R.id.rd_s2);
rdS3 = (RadioButton) findViewById(R.id.rd_s3);
rdS4 = (RadioButton) findViewById(R.id.rd_s4);
btnS = (Button) findViewById(R.id.btn_s);
btnS.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
String input;
String result = null;
Double dbl;
Intent i = new Intent(MainActivity.this, SecondActivity.class);
switch (v.getId()) {
case R.id.rd_s1:
input = rdS1.getText().toString();
dbl = Double.parseDouble(input);
i.putExtra("score", 0);
break;
case R.id.rd_s2:
i.putExtra("score", 0);
break;
case R.id.rd_s3:
i.putExtra("score", 25);
break;
case R.id.rd_s4:
i.putExtra("score", 0);
break;
default:
break;
}
startActivity(i);
}
});
}
#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;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
switch (item.getItemId()) {
case R.id.hint_icon:
ShowAlertDialog();
break;
case R.id.about_icon:
Toast.makeText(this, "developed by Georges Matta",
Toast.LENGTH_SHORT).show();
default:
break;
}
return super.onOptionsItemSelected(item);
}
public void ShowAlertDialog() {
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Hint")
.setMessage("The famouse sport is Bullfighting")
.setCancelable(false)
.setNegativeButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
alert.show();
}
}
edited code
rdS1 = (RadioButton) findViewById(R.id.rd_s1);
rdS2 = (RadioButton) findViewById(R.id.rd_s2);
rdS3 = (RadioButton) findViewById(R.id.rd_s3);
rdS4 = (RadioButton) findViewById(R.id.rd_s4);
btnS = (Button) findViewById(R.id.btn_s);
btnS.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
String input;
String result = null;
Double dbl;
Intent i = new Intent(MainActivity.this, SecondActivity.class);
switch (rdgS.getCheckedRadioButtonId()) {
case R.id.rd_s1:
input = rdS1.getText().toString();
dbl = Double.parseDouble(input);
result = String.valueOf(dbl);
i.putExtra("score", result);
break;
activity_main.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="#drawable/background"
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" >
<ImageView
android:id="#+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginTop="34dp"
android:src="#drawable/spanish" />
<TextView
android:id="#+id/textView1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignLeft="#+id/imageView1"
android:layout_alignParentRight="true"
android:layout_alignParentTop="true"
android:text="Gess the Country of the flag"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#CCFF99" />
<RadioGroup
android:id="#+id/rdg1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#+id/imageView1" >
<RadioButton
android:id="#+id/rd_s1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true"
android:text="Egypt"
android:textColor="#CCFF99" />
<RadioButton
android:id="#+id/rd_s2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="China"
android:textColor="#CCFF99" />
<RadioButton
android:id="#+id/rd_s3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Spanish"
android:textColor="#CCFF99" />
<RadioButton
android:id="#+id/rd_s4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="#+id/radioGroup1"
android:layout_below="#+id/radioGroup1"
android:text="Italy"
android:textColor="#CCFF99" />
</RadioGroup>
<Button
android:id="#+id/btn_s"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="#+id/rdg1"
android:layout_below="#+id/rdg1"
android:text="Next"
android:visibility="invisible" />
</RelativeLayout>
SecondActivity.java
package com.devleb.flagology;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.widget.TextView;
public class SecondActivity extends Activity {
TextView txt_result;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
txt_result = (TextView) findViewById(R.id.txtResult);
Bundle extras = getIntent().getExtras();
if (extras != null) {
String value = extras.getString("score");
txt_result.setText(value);
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.second, menu);
return true;
}
}
activity_second.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: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=".SecondActivity" >
<TextView
android:id="#+id/txtResult"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>

Simple solution is to modify your switch case as follows:
...
Intent i = new Intent(MainActivity.this, SecondActivity.class);
switch (rdgS.getCheckedRadioButtonId()) {
case R.id.rd_s1:
input = rdS1.getText().toString();
dbl = Double.parseDouble(input);
i.putExtra("score", 0);
break;
case R.id.rd_s2:
i.putExtra("score", 0);
break;
case R.id.rd_s3:
i.putExtra("score", 25);
break;
case R.id.rd_s4:
i.putExtra("score", 0);
break;
default:
break;
}
startActivity(i);
...
...
After this since your are passing in int values, you should use getInt() method. In your oncreate of SecondActivity do this:
Bundle extras = getIntent().getExtras();
if (extras != null) {
String value = String.valueOf(extras.getInt("score"));
txt_result.setText(value);
}

There is a problem here:
Intent intent = new Intent(MainActivity.this, SecondPage.class);
intent.putExtra("showResult", result);
startActivity(intent);
This should match extras.getString("score"); string in the second activity, so change it to:
Intent intent = new Intent(MainActivity.this, SecondPage.class);
intent.putExtra("score", result);
startActivity(intent);

In your onClick(View v) handler, v refers to the button btn_s, therefore switch (v.getId()) will not work since v.getId() will always return id of the button, i.e. R.id.btn_s.
You need to query states of the radio button separately, for example use
if (rdS1.isChecked()) {
// first ratio button is checked
} else if (rdS2.isChecked()) {
// second is checked
} else if ...
Replace your switch (v.getId()) in onClick(View v) with that if.

TimePicker + CheckBox

I've got a TimePicker in my app and i want to add above it a CheckBox that if it checked the TimePicker won't work. This is my TimePicker: http://developer.android.com/guide/topics/ui/controls/pickers.html#TimePicker.
How can I do that? I want the timePicker to look the same as the example.

I will put here the entire project also for others to use it if they ever need it:
Short description: A program that let's you get the time set by user and show it in the bottom of the page, after you press Done button.Used intent to get from one activity to another.
--------Main Activity-------
package com.example.chxboxtest;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends Activity implements OnClickListener {
private Button start_intent_button;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
start_intent_button = (Button) findViewById(R.id.start_intent_button);
start_intent_button.setOnClickListener(this);
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.start_intent_button: {
Intent intent = new Intent(this,TimePickerTest.class);
startActivity(intent);
}
break;
}
}
}
-------------Main 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"
>
<Button
android:id="#+id/start_intent_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Start Intent Time Picker"
android:layout_centerInParent="true"
/>
</RelativeLayout>
-------------TimePicker class ---------------
package com.example.chxboxtest;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.TextView;
import android.widget.TimePicker;
import android.widget.Toast;
public class TimePickerTest extends Activity implements OnClickListener{
private CheckBox cBox;
private TimePicker tPicker;
private TextView showTime;
private Button done;
private String hour;
private String minute;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.time_picker_layout);
initButtons();
}
private void initButtons() {
tPicker = (TimePicker) findViewById(R.id.time_picker);
showTime = (TextView) findViewById(R.id.get_time);
done = (Button)findViewById(R.id.done);
cBox = (CheckBox) findViewById(R.id.time_picker_checkbox);
cBox.setOnClickListener(this);
done.setOnClickListener(this);
}
#Override
public void onClick(View v) {
switch (v.getId()) {
//If check enable or disble timePicker
case R.id.time_picker_checkbox: {
if (((CheckBox) v).isChecked()) {
Toast.makeText(this, "CHECKED", Toast.LENGTH_SHORT).show();
tPicker.setEnabled(false);
} else {
Toast.makeText(this, "NOT CHECKED", Toast.LENGTH_SHORT).show();
tPicker.setEnabled(true);
}
}
break;
//If Done button pressed get time selected by user
case R.id.done:{
tPicker.clearFocus();
// re-read the values, in my case i put them in a Time object.
hour = tPicker.getCurrentHour().toString();
minute = tPicker.getCurrentMinute().toString();
if(tPicker.getCurrentMinute().intValue() < 10){
String setTimeText = hour+ " : " + "0" + minute;
showTime.setText(setTimeText);
}else{
String setTimeText = hour+ " : " + minute;
showTime.setText(setTimeText);
}
}
break;
default:
break;
}
}
}
-------------TimerPicker XML------------
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="#+id/timer_textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/time_picker"
android:layout_toRightOf="#+id/time_picker_checkbox"
android:text="Check this to Cancel Alarm" />
<CheckBox
android:id="#+id/time_picker_checkbox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/time_picker"
android:layout_centerHorizontal="true" />
<TimePicker
android:id="#+id/time_picker"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true" />
<Button
android:id="#+id/done"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#+id/time_picker"
android:layout_centerHorizontal="true"
android:gravity="center"
android:text="Done" />
<TextView
android:id="#+id/get_time"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:gravity="center_horizontal"
android:text="Time"
android:textColor="#FF0000"
android:textSize="25sp" />
</RelativeLayout>
-------------Manifest.xml-----------
**<activity
android:name="com.example.chxboxtest.TimePickerTest"
android:configChanges="orientation|keyboardHidden">
</activity>**
Dont forget to add TimePicker class as activity.
BestPracice add all xml text in strings.xml
Cheers

Here's an functional example with all your requirements.
Tested and 100% functional :)
Put this in 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:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
>
<TextView
android:id="#+id/timer_textview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Check this to Cancel Alarm"
android:layout_above="#+id/time_picker"
android:layout_toRightOf="#+id/time_picker_checkbox"
/>
<CheckBox
android:id="#+id/time_picker_checkbox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/time_picker"
/>
<TimePicker
android:id="#+id/time_picker"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
/>
And Here is your java code:
package com.example.chxboxtest;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.CheckBox;
import android.widget.TimePicker;
import android.widget.Toast;
public class MainActivity extends Activity implements OnClickListener {
private CheckBox cBox;
private TimePicker tPicker;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initButtons();
}
private void initButtons() {
tPicker = (TimePicker) findViewById(R.id.time_picker);
cBox = (CheckBox) findViewById(R.id.time_picker_checkbox);
cBox.setOnClickListener(this);
}
#Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.time_picker_checkbox: {
if (((CheckBox) v).isChecked()) {
Toast.makeText(this, "Deactivate",Toast.LENGTH_SHORT).show();
tPicker.setEnabled(false);
} else {
Toast.makeText(this, "Activate",Toast.LENGTH_SHORT).show();
tPicker.setEnabled(true);
}
}
break;
default:
break;
}
}
}
If you want this example in a custom dialog please let me know.
Cheers,

force down error in app

I have a problem on running my app but i cant find out where is the problem! I have created a first screen that has two buttons. This "home" screen is chordsApp.java. I want to go to the track1.java if I press the first button and to track2.java if I press the second! The program runs but when I'm trying to press the first or the second button it pops up an error and tells me to force down!! Here is the code:
ChordApp.java
package com.example.ChordsApp;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class ChordsApp extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button next = (Button) findViewById(R.id.button);
next.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent myIntent = new Intent(view.getContext(), track1.class);
startActivityForResult(myIntent,0);
}
});
Button next1 = (Button) findViewById(R.id.button1);
next1.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent myIntent = new Intent(view.getContext(), track2.class);
startActivityForResult(myIntent, 0);
}
});
}
}
track1.java
package com.example.ChordsApp;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class track1 extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main2);
Button next = (Button) findViewById(R.id.button3);
next.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent intent = new Intent();
setResult(RESULT_OK, intent);
finish();
}
});
}
}
track2.java
package com.example.ChordsApp;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
public class track2 extends Activity {
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main3);
Button next1 = (Button) findViewById(R.id.button4);
next1.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
Intent intent = new Intent();
setResult(RESULT_OK, intent);
finish();
}
});
}
}
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<ImageView
android:id="#+id/pic"
android:adjustViewBounds="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/guitar"
android:layout_gravity="center"
/>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#string/hello"
/>
<LinearLayout
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal" >
<Button
android:text="track1"
android:id="#+id/button"
android:layout_width="250px"
android:textSize="18px"
android:layout_height="55px" />
<Button
android:text="track2"
android:id="#+id/button1"
android:layout_width="250px"
android:textSize="18px"
android:layout_height="55px" />
</LinearLayout>
</LinearLayout>
main2.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="hi"/>
<Button android:text="Home"
android:id="#+id/button3"
android:layout_width="250px"
android:textSize="18px"
android:layout_height="55px"
android:layout_gravity="center_horizontal"
>
</Button>
</LinearLayout>
main3.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="hi"/>
<Button android:text="Home"
android:id="#+id/button4"
android:layout_width="250px"
android:textSize="18px"
android:layout_height="55px"
android:layout_gravity="center_horizontal"
>
</Button>
</LinearLayout>

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

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