Saturday, January 31, 2015

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
IT Certification Category (English)640x480

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