2013.12.03 ——— android onPrepareOptionsMenu onCreateOptionsMenu onCreateContextM

2013.12.03 ——— android onPrepareOptionsMenu onCreateOptionsMenu onCreateContextMenu

1、onCreateOptionsMenu onCreateContextMenu的区别
参考：http://blog.csdn.net/sunnyfans/article/details/9966263
onCreateOptionsMenu:初始化Menu
onCreateContextMenu:用于view长按显示的菜单

public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);Button b = (Button) findViewById(R.id.button1);/*给View 的子控件绑定ContextMenu 菜单，长按此子控件就会弹出ContextMenu菜单*/registerForContextMenu(b);}/* 每次长按ContextMenu被绑定的View的子控件，都会调用此方法*/@Overridepublic void onCreateContextMenu(ContextMenu menu, View v,ContextMenuInfo menuInfo) {System.out.println("onCreateContextMenu------>");getMenuInflater().inflate(R.menu.main, menu);super.onCreateContextMenu(menu, v, menuInfo);}@Overridepublic boolean onContextItemSelected(MenuItem item){System.out.println("onContextItemSelected------>"+item.getItemId());return true;}/* 第一次按点击手机上界面上的菜单键，会调用此方法，只方法只调用一次*/@Overridepublic boolean onCreateOptionsMenu(Menu menu) {System.out.println("onCreateOptionsMenu------>");getMenuInflater().inflate(R.menu.main, menu);return true;}@Overridepublic boolean onPrepareOptionsMenu(Menu menu) {System.out.println("onPrepareOptionsMenu------>");return super.onPrepareOptionsMenu(menu);}@Overridepublic boolean onOptionsItemSelected(MenuItem item){System.out.println("onOptionsItemSelected------>"+item.getItemId());return true;}}

2、onPrepareOptionsMenu onCreateOptionsMenu 区别
参考：http://blog.csdn.net/sky181772733/article/details/6922615
onPrepareOptionsMenu：每次按menu键都会调用所以它可以用来更新menu
onCreateOptionsMenu ：只会调用一次

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