android Menu最基本使用 代码
/** OptionsMenu_exerciseActivity.java */
package com.chenyz.android.option_menu;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
public class OptionsMenu_exerciseActivity extends Activity {
Button btn1, btn2;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
btn1 = (Button) findViewById(R.id.button1);
btn2 = (Button) findViewById(R.id.button2);
btn1.setVisibility(View.INVISIBLE);
btn2.setVisibility(View.INVISIBLE);
}
@Override
public boolean onCreateOptionsMenu(Menu menu){
super.onCreateOptionsMenu(menu);
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.chrome:
btn1.setVisibility(View.VISIBLE);
btn2.setVisibility(View.INVISIBLE);
return true;
case R.id.word:
btn2.setVisibility(View.VISIBLE);
btn1.setVisibility(View.INVISIBLE);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
<?xml version="1.0" encoding="utf-8"?>
<!-- /res/menu/menu.xml-->
<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<item
android:id="@+id/word"
android:icon="@drawable/word"
android:title="@string/word"
/>
<item
android:id="@+id/excel"
android:icon="@drawable/exl"
android:title="@string/excel"
/>
<item
android:id="@+id/ppt"
android:icon="@drawable/ppt"
android:title="@string/powerpoint"
/>
<item
android:id="@+id/chrome"
android:icon="@drawable/chrome"
android:title="@string/chrome"
/>
</menu>
<?xml version="1.0" encoding="utf-8"?>
<!-- /res/values/strings.xml-->
<resources>
<string name="hello">push menu button</string>
<string name="app_name">OptionsMenu_exercise</string>
<string name="word">Word</string>
<string name="excel">Excel</string>
<string name="chrome">Chrome</string>
<string name="powerpoint">PowerPoint</string>
</resources>
<?xml version="1.0" encoding="utf-8"?>
<!-- /res/layout/main.xml-->
<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/hello" />
<Button
android:id="@+id/button1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<Button
android:id="@+id/button2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>