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我使用了我在此處找到的解決方案,將Action Bar上的左按鈕作爲Drawer切換,當Backstack和Back按鈕沒有任何內容時。這裏的實施ActionBar中的抽屜/後退按鈕在後退時無法點擊
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity);
ButterKnife.bind(this);
setSupportActionBar(mToolbar);
final ActionBar actionBar = getSupportActionBar();
if (actionBar != null) {
actionBar.setDisplayShowHomeEnabled(true);
actionBar.setDisplayHomeAsUpEnabled(true);
}
navigateTo(R.id.menu_drawer);
initDrawer();
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout, mToolbar,
R.string.main_open_menu, R.string.main_close_menu)
{
public void onDrawerClosed(View view){
syncActionBarState();
}
public void onDrawerOpened(View view){
mDrawerToggle.setDrawerIndicatorEnabled(true);
}
};
mOnBackStackChangedListener =
new android.support.v4.app.FragmentManager.OnBackStackChangedListener() {
@Override
public void onBackStackChanged() {
syncActionBarState();
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
getSupportFragmentManager().addOnBackStackChangedListener(mOnBackStackChangedListener);
}
private void syncActionBarState(){
int backStackCount = getSupportFragmentManager().getBackStackEntryCount();
mDrawerToggle.setDrawerIndicatorEnabled(backStackCount == 0);
if(backStackCount == 0){
mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_UNLOCKED);
}else{
mDrawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
}
}
作爲抽屜切換按鈕工作正常。當作爲後退按鈕工作時,它甚至不會觸發OnOptionsItemClickListener。我錯過了什麼?