Dynamic Checkboxes: Java Source Code

Add 350
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⇒ 		Check 350
& 513

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import java.util.Iterator;
An interface is used to iterate over a collection.

import java.util.LinkedHashMap;
It is the class of hash table and linked list implementation of the Map interface, with predictable iteration order.

import java.util.Map;
An object maps keys to values. A map cannot contain duplicate keys; each key can map to at most one value.

import java.util.Set;
A collection contains no duplicate elements. More formally, sets contain no pair of elements e1 and e2 such that e1.equals(e2), and at most one null element.

import android.widget.LinearLayout;
A linear layout arranges its children in a single column or a single row. The direction of the row can be set by calling setOrientation. The default orientation is horizontal. Gravity, which specifies the alignment of all the child elements, can be specified by setGravity.

import android.graphics.Color;
The Color class defines methods for creating and converting color ints. Colors are represented as packed ints, made up of 4 bytes: alpha, red, green, blue.
DynamicCheckbox/app/src/main/java/com/ecs/wenchen/dynamiccheckbox/MainActivity.java 
package com.ecs.wenchen.dynamiccheckbox;

import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.EditText;
import android.graphics.Color;

public class MainActivity extends Activity {
  LinearLayout linearBox;
  CheckBox     checkBox, checkBox1;

  @Override
  protected void onCreate( Bundle savedInstanceState ) {
    super.onCreate( savedInstanceState );
    setContentView( R.layout.activity_main );

    linearBox = (LinearLayout) findViewById( R.id.linearBox );
    final EditText number = (EditText) findViewById( R.id.number );
    final EditText title  = (EditText) findViewById( R.id.title );
    final Button   button = (Button)   findViewById( R.id.add );

    button.setOnClickListener( new View.OnClickListener( ) {
      public void onClick( View v ) {
        checkBox1 = new CheckBox( getApplicationContext( ) );
        checkBox1.setId( Integer.parseInt( number.getText( ).toString( ) ) );
        checkBox1.setText( title.getText( ).toString( ) );
        checkBox1.setTextColor( Color.BLACK );
        checkBox1.setOnClickListener( getOnClickDoSomething( checkBox1 ) );
        linearBox.addView( checkBox1 );
      }
    } );

    final LinkedHashMap<String, String>
      alphabet = new LinkedHashMap<String, String>( );
    alphabet.put( "260", ".NET" );
    alphabet.put( "370", "Computer Architecture" );

    Set<?> set = alphabet.entrySet( );
    // Get an iterator.
    Iterator<?> i = set.iterator( );
    // Display elements.
    while ( i.hasNext( ) ) {
      @SuppressWarnings( "rawtypes" )
      Map.Entry me = ( Map.Entry ) i.next( );
      checkBox     = new CheckBox( this );
      checkBox.setId( Integer.parseInt( me.getKey( ).toString( ) ) );
      checkBox.setText( me.getValue( ).toString( ) );
      checkBox.setOnClickListener( getOnClickDoSomething( checkBox ) );
      linearBox.addView( checkBox );
    }
  }

  View.OnClickListener getOnClickDoSomething( final Button button ) {
    return new View.OnClickListener( ) {
      public void onClick( View v ) {
        final TextView tvView = (TextView) findViewById( R.id.textView3 );
        tvView.setText( button.getId( ) + ": " + button.getText( ).toString( ) );
      }
    };
  }
}