Basic Android App Development: CheckBox Example 3

 
Create android project MyFavouriteFruitApp.

Copy a banana image to res/drawable-hdpi directory.

Then copy the following files:

<?xml version="1.0" encoding="utf-8"?> <resources>     <string name="instruction">Please pick your favourite fruit:</string>     <string name="app_name">FavouriteFruitApp</string>     <string name="chkBananaLabel">Banana</string> </resources>

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:orientation="vertical" >     <TextView         android:layout_width="fill_parent"         android:layout_height="wrap_content"         android:text="@string/instruction" />     <CheckBox         android:id="@+id/chkBanana"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@string/chkBananaLabel" />     <ImageView         android:id="@+id/imageView1"         android:layout_width="wrap_content"         android:layout_height="wrap_content" /> </LinearLayout>

package com.kent; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.CheckBox; import android.widget.ImageView; import android.widget.Toast; public class FavouriteFruitAppActivity extends Activity implements OnClickListener{                         private CheckBox chkBanana;                 @Override     public void onCreate(Bundle savedInstanceState) {                     super.onCreate(savedInstanceState);         setContentView(R.layout.main);                 chkBanana = (CheckBox) findViewById(R.id.chkBanana);         chkBanana.setOnClickListener(this);          }     public void onClick(View v) {                         CheckBox chkTemp = (CheckBox) v;                         ImageView imgView = (ImageView) findViewById(R.id.imageView1);                         if(!chkTemp.isChecked()){                         Toast.makeText(FavouriteFruitAppActivity.this,                         "Now you don't like " + chkTemp.getText(),                         Toast.LENGTH_SHORT).show();                                                 imgView.setImageResource(android.R.color.transparent);             }                         else {                                                             Toast.makeText(FavouriteFruitAppActivity.this,                         "Ohh...You likes " + chkTemp.getText(),                         Toast.LENGTH_SHORT).show();                                                 imgView.setImageResource(R.drawable.banana);         }          }   }