Android Tutorial for Beginners 9 # Android Checkbox Basics With Example

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<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity" android:id="@+id/abc"> <CheckBox android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Dog" android:id="@+id/checkBox_dog" android:layout_alignParentTop="true" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" android:layout_marginTop="46dp" android:checked="false" /> <CheckBox android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Cat" android:id="@+id/checkBox_cat" android:layout_below="@+id/checkBox_dog" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" android:layout_marginTop="34dp" android:checked="false" /> <CheckBox android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="Cow" android:id="@+id/checkBox_cow" android:layout_below="@+id/checkBox_cat" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" android:layout_marginTop="39dp" android:checked="false" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Select" android:id="@+id/button" android:layout_centerVertical="true" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" /> </RelativeLayout>

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package com.example.programmingknowledge.thefirstapp; import android.support.v7.app.ActionBarActivity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.CheckBox; import android.widget.Button; import android.widget.Toast; public class MainActivity extends ActionBarActivity { private CheckBox check1,check2 ,check3; private Button button_sel; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); addListenerOnButton(); addListnerToCheckBox(); } public void addListnerToCheckBox() { check1 = (CheckBox)findViewById(R.id.checkBox_dog); check1.setOnClickListener( new View.OnClickListener() { @Override public void onClick(View v) { if(((CheckBox)v).isChecked()) { Toast.makeText(MainActivity.this, "Dog is selected",Toast.LENGTH_LONG).show(); } } } ); } public void addListenerOnButton() { check1 = (CheckBox)findViewById(R.id.checkBox_dog); check2 = (CheckBox)findViewById(R.id.checkBox_cat); check3 = (CheckBox)findViewById(R.id.checkBox_cow); button_sel = (Button)findViewById(R.id.button); button_sel.setOnClickListener( new View.OnClickListener() { @Override public void onClick(View v) { StringBuffer result = new StringBuffer(); result.append("Dog : ").append(check1.isChecked()); result.append("\nCat : ").append(check2.isChecked()); result.append("\nCow : ").append(check3.isChecked()); Toast.makeText(MainActivity.this,result.toString(), Toast.LENGTH_LONG).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.menu_main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); //noinspection SimplifiableIfStatement if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } }

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Extra Tags : Android,  programming, tutorial, beginners , develop, ,mobile phone, Environment Setup, Application Components, Activity Lifecycle, Service Lifecycle, Application Architecture, Publishing Application, Debugging  Applications, Hadnling Events, Layouts, User Interface Controls, Styles and Themes,  Handling Rotation, data storage, managing media, Send Email, Send SMS, Phone Calls, Checkbox , Android components, Checkbox click listener,select multiple items,show selected checkbox

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