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android Menu最基本使用 代码
来源:互联网   发布日期:2015-10-03 13:20:32   浏览:2385次  

导读: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;impo......

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>

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