我想onBackPressed在片段中處理我在我的活動(dòng)中使用以下代碼，但這返回 0@Override public void onBackPressed() { int count = getFragmentManager().getBackStackEntryCount(); Toast.makeText(getBaseContext(), ""+count, Toast.LENGTH_SHORT).show(); if (count == 1) { super.onBackPressed(); //additional code } else { getFragmentManager().popBackStack(); }}
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肥皂起泡泡
TA貢獻(xiàn)1829條經(jīng)驗(yàn) 獲得超6個(gè)贊
只需添加.addToBackStack(null)您的Activityor Fragment。當(dāng)您添加或替換fragment. 像下面
getSupportFragmentManager().beginTransaction().replace(R.id.parent_layout, new MyFragment()).addToBackStack(null).commit();
注意：-您不必在onBackPressed()方法中做任何事情。
慕標(biāo)琳琳
TA貢獻(xiàn)1830條經(jīng)驗(yàn) 獲得超9個(gè)贊
Just app this line when you want to replace any fragment and manage backsack on Fragment.ClientHome per = new ClientHome(); Bundle bundle = new Bundle();
bundle.putString("usertype", "client");
per.setArguments(bundle);
FragmentManager fragmentManager = getFragmentManager(); FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.setCustomAnimations(R.anim.slide_from_left, R.anim.slide_to_right);
fragmentTransaction.replace(R.id.content_frame, per, "tag");
fragmentTransaction.addToBackStack("tag");
fragmentTransaction.commit();添加回答
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