java - fragment 替换错误

Question

我正在尝试替换我的一个 fragment ，但由于这些错误我无法这样做。但是我已经有了这些导入，因此我不知道这里出了什么问题。

错误1

Error:(73, 96) error: incompatible types
required: android.support.v4.app.FragmentTransaction
found:    android.app.FragmentTransaction

错误2

Error:(72, 48) error: incompatible types
required: Fragment
found:    FragmentMap

导入

import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;

fragment 替换代码

Fragment newFragment = new FragmentMap();
FragmentTransaction transaction = getFragmentManager().beginTransaction();

transaction.replace(R.id.detail_container, newFragment);
transaction.addToBackStack(null);
transaction.commit();

最新截图

Answer 1

对于错误1

Error:(73, 96) error: incompatible types
required: android.support.v4.app.FragmentTransaction
found:    android.app.FragmentTransaction

将 getFragmentManager() 更改为 getSupportFragmentManager() 它应该可以工作。

getSupportFragmentManager() is used when you are using support lib (your case). and getFragmentManager() is used when not using support lib.

对于错误2

Error:(72, 48) error: incompatible types
required: Fragment
found:    FragmentMap

因此要替换 fragment ，请使用以下命令:

Fragment newFragment = new FragmentMap();
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();

transaction.replace(R.id.detail_container, newFragment);
transaction.addToBackStack(null);
transaction.commit();

newFragment 是要替换的 fragment ，但会引发错误。

Make sure the FragmentMap or any other fragment to be replaced, is extended by Fragment class (of support lib and not the normal one, because newFragment is an object of Fragment from support lib) using import android.support.v4.app.Fragment; and not import android.app.Fragment;