android - ActionBarsherlock android.R.id.home 当我使用 Actionbarsherlock public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case android.R.id.home: this.finish();

Question

当我使用 Actionbarsherlock

public boolean onOptionsItemSelected(MenuItem item)
{
    switch (item.getItemId())
    {
    case android.R.id.home:
        this.finish();
        return true;
    default:
        return super.onOptionsItemSelected(item);
    }
}

我注意到 android.R.id.home 来自 API 11。我们如何确保 android.R.id.home 在 API 8 上是正确的？

Answer 1

It is a static final constant which means its value is copied into the compiled code instead of being just a reference. This is why it is able to be used successfully on every API level.