Android菜单

Android中的2种Menu：OptionsMenu、ContextMenu

Activity自带了2种弹出框menu，样式好看，调用简单，可以替代很多功能，比如Dialog，下拉菜单等等

1、onCreateOptionsMenu选择菜单

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点击导航条左上角...显示。此方法在Android Stuido创建的项目中，Activity中自带

 @Override    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.menu_main, menu);        return true;    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        int id = item.getItemId();        switch (id) {            case R.id.action_settings:                break;            case R.id.action_add:                break;        }        return super.onOptionsItemSelected(item);    }

 

2、onCreateContextMenu上下文菜单

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这个菜单绑定其他控件使用。比如点击按钮，跳出ContextMenu（menu.main.xml同一个）

btn_long = (Button) findViewById(R.id.btn_long);registerForContextMenu(btn_long);@Overridepublic void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {    getMenuInflater().inflate(R.menu.menu_main, menu);    super.onCreateContextMenu(menu, v, menuInfo);}@Overridepublic boolean onContextItemSelected(MenuItem item) {    int id = item.getItemId();    switch (id) {        case R.id.action_settings:            break;        case R.id.action_add:            break;    }    return super.onContextItemSelected(item);}

onCreateOptionsMenu只会被创建一次

onCreateContextMenu每次执行都会创建

标签：onCreateContextMenu onCreateOptionsMenu Android Meun