Understand Menu option.
a. Create an application that will change color of the screen,based on selected options from the menu.
File Name : E7Activity.java
package bsr.exa;
import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.ContextMenu;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ContextMenu.ContextMenuInfo;
import android.widget.LinearLayout;
public class E7Activity extends Activity {
/** @author Bipin S Rupadiya , www.BipinRupadiya.blogspot.com
*
* 7) Understand Menu option.
* a. Create an application that will change color of the screen,
* based on selected options from the menu.
**/
LinearLayout ll;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ll= new LinearLayout(this);
ll.setOnCreateContextMenuListener(this);
setContentView(ll);
}
//For Option menu creation
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
CreateMenu(menu);
return true;
}
//For Option menu creation
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
return MenuChoice(item);
}
//For Context menu creation
@Override
public void onCreateContextMenu(ContextMenu menu, View view,ContextMenuInfo menuInfo)
{
super.onCreateContextMenu(menu, view, menuInfo);
CreateMenu(menu);
}
//For Context menu selection
@Override
public boolean onContextItemSelected(MenuItem item)
{
return MenuChoice(item);
}
private void CreateMenu(Menu menu)
{
MenuItem mnu1 = menu.add(0, 0, 0, "RED");
{
mnu1.setAlphabeticShortcut('r');
}
MenuItem mnu2 = menu.add(0, 1, 1, "GREEN");
{
mnu2.setAlphabeticShortcut('g');
//mnu2.setIcon(R.drawable.icon);
}
MenuItem mnu3 = menu.add(0, 2, 2, "BLUE");
{
mnu3.setAlphabeticShortcut('c');
}
}
private boolean MenuChoice(MenuItem item)
{
switch (item.getItemId())
{
case 0:
ll.setBackgroundColor(Color.rgb(255,0,0));
return true;
case 1:
ll.setBackgroundColor(Color.rgb(0,255,0));
return true;
case 2:
ll.setBackgroundColor(Color.rgb(0,0,255));
return true;
}
return false;
}
}
AndroidManifest.xml
<?xml version="1.0"
encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="bsr.exa"
android:versionCode="1"
android:versionName="1.0">
<uses-sdk android:minSdkVersion="8"
/>
<application android:icon="@drawable/icon"
android:label="@string/app_name">
<activity android:name=".E7Activity"
android:label="@string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN"
/>
<category android:name="android.intent.category.LAUNCHER"
/>
</intent-filter>
</activity>
</application>
</manifest>