Android 使用.setEnabled()启用/禁用选项菜单按钮?
我正在尝试这样做:Android 使用.setEnabled()启用/禁用选项菜单按钮?,android,android-menu,android-optionsmenu,Android,Android Menu,Android Optionsmenu,我正在尝试这样做: @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.menu, menu); //multiListener = false; menu.add(0,START_DELETE,0, "Delete selected..").setEnable
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu, menu);
//multiListener = false;
menu.add(0,START_DELETE,0, "Delete selected..").setEnabled(multiListener);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle item selection
switch (item.getItemId()) {
case R.id.multiselect:
if(multiselect == 0) { multiselect = 1;
multiListener = true;
Log.d("DH", "index="+multiListener);
}
else if(multiselect == 1) { multiselect = 0; multiListener = false;
Log.d("DH", "index="+multiListener);
}
fillData();
return true;
case START_DELETE:
Toast.makeText(Notepadv3.this, "Pressed delete", Toast.LENGTH_SHORT).show();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
基本上,如果multiListener=true;使“Delete selected…”可按,否则灰显
这件简单的事。。不想和我一起锻炼
不知何故。。。按钮总是灰显,虽然日志上说,它会变为真
有人知道吗?您应该再次调用
setEnabled()
来更改项目的状态。它的状态不绑定到变量。应该在onprepareOptions菜单()中调用此方法。
谢谢!这使得契约:)