menu item home区域的的id

今天真的是手贱啊，明明是android .R.id.home，偏要写成R.id.home

结果半天不出来，点击每反应，做一个备忘：

      

@Overridepublic boolean onOptionsItemSelected(MenuItem item) {    // Handle action bar item clicks here. The action bar will    // automatically handle clicks on the Home/Up button, so long    // as you specify a parent activity in AndroidManifest.xml.    int id = item.getItemId();    //noinspection SimplifiableIfStatement    switch (id){        case R.id.action_settings:            return true;        case android.R.id.home:            Intent intent=new Intent(ExploreActivity.this,MainActivity.class);            startActivity(intent);            this.finish();            Log.i(TGA, ":back to main");            return true;        default:            return super.onOptionsItemSelected(item);    }}