Basic Android Training: Using CheckBox and ImageView

Basic Android Training: Using CheckBox and ImageView

Create android project MyFavouriteFruitApp.

Copy three images named as apple, orange and banana 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="chkAppleLabel">Apple</string>     <string name="chkOrangeLabel">Orange</string>     <string name="chkBananaLabel">Banana</string>     <string name="chkClearLabel">Clear</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/chkApple"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@string/chkAppleLabel" />     <CheckBox         android:id="@+id/chkOrange"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@string/chkOrangeLabel" />     <CheckBox         android:id="@+id/chkBanana"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@string/chkBananaLabel" />     <CheckBox         android:id="@+id/chkClear"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="@string/chkClearLabel" />     <ImageView         android:id="@+id/imageView1"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:src="@drawable/banana" /> </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; public class FavouriteFruitAppActivity extends Activity implements OnClickListener{                         private CheckBox chkApple, chkOrange;                 @Override     public void onCreate(Bundle savedInstanceState) {                     super.onCreate(savedInstanceState);         setContentView(R.layout.main);                 chkApple = (CheckBox) findViewById(R.id.chkApple);         chkApple.setOnClickListener(this);                 chkOrange = (CheckBox) findViewById(R.id.chkOrange);         chkOrange.setOnClickListener(this);                ((CheckBox) findViewById(R.id.chkBanana)).setOnClickListener(this);        ((CheckBox) findViewById(R.id.chkClear)).setOnClickListener(this);     }     public void onClick(View v) {             /*          CheckBox chkTemp = (CheckBox) v;             chkTemp.getText();                         if (chkTemp.isChecked()) {                                                             Toast.makeText(FavouriteFruitAppActivity.this,                         "You have selected " + chkTemp.getText(),                         Toast.LENGTH_SHORT).show();             }*/                         ImageView imgView = imgView = (ImageView) findViewById(R.id.imageView1);                         switch(v.getId()) {                                     case R.id.chkApple:                                     // Change the ImageView to Apple photo                         imgView.setImageResource(R.drawable.apple);                                     break;                                                             case R.id.chkOrange:                                     // Change the ImageView to Orange photo                         imgView.setImageResource(R.drawable.orange);                                     break;                                                             case R.id.chkBanana:                                     // Change the ImageView to Banana photo                         imgView.setImageResource(R.drawable.banana);                                     break;                                                             case R.id.chkClear:                                     // Clear the existing photo                                     imgView.setImageResource(android.R.color.transparent);                                     break;             }          }   }