1.Static CheckBox Creation in Android.
2.Dynamic CheckBox Creation in Android.
3.Reset CheckBox in Android.
1.Static CheckBox Creation in Android.
Step 1 : Select File -> New -> Project -> Android Application Project (or) Android Project. Fill the forms and click "Finish" button. If you have any doubt regarding create a new project Click Here.
Step 2 : Open res -> layout -> activity_main.xml (or) main.xml and add following 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" >
<TextView
android:id="@+id/textView1"
android:textColor="#FF0000"
android:textSize="20dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="60dp"
android:text="Static CheckBox" />
<CheckBox
android:id="@+id/checkBox1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="110dp"
android:text="Hemanth" />
<CheckBox
android:id="@+id/checkBox2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="160dp"
android:text="Somaraju" />
<CheckBox
android:id="@+id/checkBox3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="210dp"
android:text="Kakinada" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="290dp"
android:text="Proceed" />
</RelativeLayout>
Step 3 : Open src -> package -> MainActivity.java and add following code :
package com.gudivada.hemanthsomaraju;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.Toast;
public class MainActivity extends Activity {
CheckBox c1, c2, c3;
Button b;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
c1 = (CheckBox) findViewById(R.id.checkBox1);
c2 = (CheckBox) findViewById(R.id.checkBox2);
c3 = (CheckBox) findViewById(R.id.checkBox3);
b = (Button) findViewById(R.id.button1);
b.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if((c1.isChecked()==false) && (c2.isChecked()==false) && (c3.isChecked()==false))
{
Toast.makeText(getBaseContext(),"None Selected",
Toast.LENGTH_SHORT).show();
}
else
{
String str = null;
if(c1.isChecked())
{
str="Hemanth";
}
if(c2.isChecked())
{
str=str.concat("Somaraju");
}
if(c3.isChecked())
{
str=str.concat("Kakinada");
}
int i=str.length();
String str1=" are selected";
String str2=" is selected";
if(i>9)
{
str=str.concat(str1);
Toast.makeText(getBaseContext(), str,
Toast.LENGTH_SHORT).show();
}
else
{
str=str.concat(str2);
Toast.makeText(getBaseContext(), str,
Toast.LENGTH_SHORT).show();
}
}
}
});
b.setOnLongClickListener(new View.OnLongClickListener() {
public boolean onLongClick(View v) {
// TODO Auto-generated method stub
c1.setChecked(false);
c2.setChecked(false);
c3.setChecked(false);
Toast.makeText(getBaseContext(), "Long Pressed & Refreshed ChekBoxes", Toast.LENGTH_SHORT).show();
return true;
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
Step 4 : Open AndroidManifest.xml and add following code :
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.gudivada.hemanthsomaraju"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.gudivada.hemanthsomaraju.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Step 5 : Our output will be like this :
2.Dynamic CheckBox Creation in Android.
Step 1 : Select File -> New -> Project -> Android Application Project (or) Android Project. Fill the forms and click "Finish" button. If you have any doubt regarding create a new project Click Here.
Step 2 : Open res -> layout -> activity_main.xml (or) main.xml and add following code :
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/rl"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="@+id/textView1"
android:textColor="#FF0000"
android:textSize="20dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="60dp"
android:text="Dynamic CheckBox" />
</RelativeLayout>
Step 3 : Open src -> package -> MainActivity.java and add following code :
package com.gudivada.hemanthsomaraju;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.RelativeLayout;
import android.widget.Toast;
public class MainActivity extends Activity {
RelativeLayout rl;
CheckBox c1, c2, c3;
Button b;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
rl = (RelativeLayout) findViewById(R.id.rl);
c1 = new CheckBox (MainActivity.this);
c2 = new CheckBox (MainActivity.this);
c3 = new CheckBox (MainActivity.this);
b = new Button (MainActivity.this);
c1.setText("Hemanth");
c2.setText("Somaraju");
c3.setText("Kakinada");
b.setText("Proceed");
RelativeLayout.LayoutParams params1 = new RelativeLayout.LayoutParams
((int)LayoutParams.WRAP_CONTENT, (int) LayoutParams.WRAP_CONTENT);
params1.leftMargin = 150;
params1.topMargin = 170;
RelativeLayout.LayoutParams params2 = new RelativeLayout.LayoutParams
((int)LayoutParams.WRAP_CONTENT, (int) LayoutParams.WRAP_CONTENT);
params2.leftMargin = 150;
params2.topMargin = 235;
RelativeLayout.LayoutParams params3 = new RelativeLayout.LayoutParams
((int)LayoutParams.WRAP_CONTENT, (int) LayoutParams.WRAP_CONTENT);
params3.leftMargin = 150;
params3.topMargin = 300;
RelativeLayout.LayoutParams params4 = new RelativeLayout.LayoutParams
((int)LayoutParams.WRAP_CONTENT, (int) LayoutParams.WRAP_CONTENT);
params4.leftMargin = 150;
params4.topMargin = 400;
c1.setLayoutParams(params1);
c2.setLayoutParams(params2);
c3.setLayoutParams(params3);
b.setLayoutParams(params4);
rl.addView(c1);
rl.addView(c2);
rl.addView(c3);
rl.addView(b);
b.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
if((c1.isChecked()==false) && (c2.isChecked()==false) && (c3.isChecked()==false))
{
Toast.makeText(getBaseContext(),"None Selected",
Toast.LENGTH_SHORT).show();
}
else
{
String str = null;
if(c1.isChecked())
{
str="Hemanth";
}
if(c2.isChecked())
{
str=str.concat("Somaraju");
}
if(c3.isChecked())
{
str=str.concat("Kakinada");
}
int i=str.length();
String str1=" are selected";
String str2=" is selected";
if(i>9)
{
str=str.concat(str1);
Toast.makeText(getBaseContext(), str,
Toast.LENGTH_SHORT).show();
}
else
{
str=str.concat(str2);
Toast.makeText(getBaseContext(), str,
Toast.LENGTH_SHORT).show();
}
}
}
});
b.setOnLongClickListener(new View.OnLongClickListener() {
public boolean onLongClick(View v) {
// TODO Auto-generated method stub
c1.setChecked(false);
c2.setChecked(false);
c3.setChecked(false);
Toast.makeText(getBaseContext(), "Long Pressed & Refreshed ChekBoxes", Toast.LENGTH_SHORT).show();
return true;
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
Step 4 : Open AndroidManifest.xml and add following code :
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.gudivada.hemanthsomaraju"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.gudivada.hemanthsomaraju.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Step 5 : Our output will be like this :
3.Reset CheckBox in Android.
Step 1 : Select File -> New -> Project -> Android Application Project (or) Android Project. Fill the forms and click "Finish" button. If you have any doubt regarding create a new project Click Here.
Step 2 : Open res -> layout -> activity_main.xml (or) main.xml and add following 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" >
<TextView
android:id="@+id/textView1"
android:textSize="20dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="50dp"
android:text="Reset CheckBox" />
<CheckBox
android:id="@+id/checkBox1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="120dp"
android:text="Hemanth" />
<CheckBox
android:id="@+id/checkBox2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_below="@+id/checkBox1"
android:layout_marginTop="40dp"
android:text="Somaraju" />
<CheckBox
android:id="@+id/checkBox3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_below="@+id/checkBox2"
android:layout_marginTop="40dp"
android:text="Kakinada" />
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/checkBox3"
android:layout_centerHorizontal="true"
android:layout_marginTop="40dp"
android:text="Reset" />
</RelativeLayout>
Step 3 : Open src -> package -> MainActivity.java and add following code :
package com.gudivada.hemanthsomaraju;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
public class MainActivity extends Activity {
CheckBox c1, c2, c3;
Button reset;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
c1 = (CheckBox) findViewById(R.id.checkBox1);
c2 = (CheckBox) findViewById(R.id.checkBox2);
c3 = (CheckBox) findViewById(R.id.checkBox3);
reset = (Button) findViewById(R.id.button1);
reset.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
c1.setChecked(false);
c2.setChecked(false);
c3.setChecked(false);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
Step 4 : Open AndroidManifest.xml and add following code :
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.gudivada.hemanthsomaraju"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="19" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.gudivada.hemanthsomaraju.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Step 6 : Our output will be like this :
