我无法理解为什么我的objFragment给了我支持经理的问题，我收到了这个错误：
Error:(101, 17) error: no suitable method found for replace(int,android.support.v4.app.Fragment)
method FragmentTransaction.replace(int,android.app.Fragment,String) is not applicable
(actual and formal argument lists differ in length)
method FragmentTransaction.replace(int,android.app.Fragment) is not applicable
(actual argument android.support.v4.app.Fragment cannot be converted to android.app.Fragment by method invocation conversion)
在此行的objFragment上发生了这件事：.replace(R.id.container, objFragment)
这是我的完整代码：
import android.app.ActionBar;
import android.app.Activity;
import android.app.FragmentManager;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.widget.DrawerLayout;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.support.v4.app.Fragment;
/* public class MainActivity extends FragmentActivity {
public static FragmentManager fragmentManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// initialising the object of the FragmentManager. Here I'm passing getSupportFragmentManager(). You can pass getFragmentManager() if you are coding for Android 3.0 or above.
fragmentManager = getSupportFragmentManager();
}
} */
public class MainActivity2Activity extends FragmentActivity
implements NavigationDrawerFragment.NavigationDrawerCallbacks {
/**
* Fragment managing the behaviors, interactions and presentation of the navigation drawer.
*/
private NavigationDrawerFragment mNavigationDrawerFragment;
/**
* Used to store the last screen title. For use in {@link #restoreActionBar()}.
*/
private CharSequence mTitle;
public static android.support.v4.app.FragmentManager fragmentManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_activity2);
// initialising the object of the FragmentManager. Here I'm passing getSupportFragmentManager(). You can pass getFragmentManager() if you are coding for Android 3.0 or above.
fragmentManager = getSupportFragmentManager();
mNavigationDrawerFragment = (NavigationDrawerFragment)
getFragmentManager().findFragmentById(R.id.navigation_drawer);
mTitle = getTitle();
// Set up the drawer.
mNavigationDrawerFragment.setUp(
R.id.navigation_drawer,
(DrawerLayout) findViewById(R.id.drawer_layout));
// initialising the object of the FragmentManager. Here I'm passing getSupportFragmentManager(). You can pass getFragmentManager() if you are coding for Android 3.0 or above.
fragmentManager = getSupportFragmentManager();
}
@Override
public void onNavigationDrawerItemSelected(int position) {
// This method controls the navigation drawer
Fragment objFragment = null;
switch (position) {
case 0:
objFragment = new menu_1_fragment();
break;
case 1:
objFragment = new menu_2_fragment();
break;
case 2:
objFragment = new menu_3_fragment();
break;
case 3:
objFragment = new menu_4_fragment();
break;
case 4:
objFragment = new menu_5_fragment();
break;
}
// update the main content by replacing fragments
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.container, objFragment)
.commit();
}
public void onSectionAttached(int number) {
switch (number) {
case 1:
mTitle = getString(R.string.title_section1);
break;
case 2:
mTitle = getString(R.string.title_section2);
break;
case 3:
mTitle = getString(R.string.title_section3);
break;
case 4:
mTitle = getString(R.string.title_section4);
break;
case 5:
mTitle = getString(R.string.title_section5);
break;
}
}
public void restoreActionBar() {
ActionBar actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
actionBar.setDisplayShowTitleEnabled(true);
// actionBar.setTitle(mTitle);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
if (!mNavigationDrawerFragment.isDrawerOpen()) {
// Only show items in the action bar relevant to this screen
// if the drawer is not showing. Otherwise, let the drawer
// decide what to show in the action bar.
getMenuInflater().inflate(R.menu.main_activity2, menu);
restoreActionBar();
return true;
}
return super.onCreateOptionsMenu(menu);
}
@Override
public 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();
// Link to settings in the main menu or create google maps options
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* A placeholder fragment containing a simple view.
*/
public static class PlaceholderFragment extends Fragment {
/**
* The fragment argument representing the section number for this
* fragment.
*/
private static final String ARG_SECTION_NUMBER = "section_number";
/**
* Returns a new instance of this fragment for the given section
* number.
*/
public static PlaceholderFragment newInstance(int sectionNumber) {
PlaceholderFragment fragment = new PlaceholderFragment();
Bundle args = new Bundle();
args.putInt(ARG_SECTION_NUMBER, sectionNumber);
fragment.setArguments(args);
return fragment;
}
public PlaceholderFragment() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_main_activity2, container, false);
return rootView;
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
((MainActivity2Activity) activity).onSectionAttached(
getArguments().getInt(ARG_SECTION_NUMBER));
}
}
}
答案 0 :(得分：40)
问题是objFragment和fragmentManager之间的片段类型不匹配。第一个来自包android.support.v4.app，而第二个来自android.app包。
参见这个答案here，了解两种碎片之间的区别。
现在修复您必须处理导入的问题。
使用import android.app.Fragment代替import android.support.v4.app.Fragment
或按照Modge的建议行事;使用支持片段管理器更新应用的主要内容，如下所示：FragmentManager fragmentManager = getSupportFragmentManager()。但是你还必须改变FragmentManager本身的类型; import android.app.FragmentManager至import android.support.v4.app.FragmentManager;
答案 1 :(得分：22)
您尝试将非支持FragmentManager用于您的事务。改变它以获得支持。
// update the main content by replacing fragments
FragmentManager fragmentManager = getSupportFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.container, objFragment)
.commit();
答案 2 :(得分：12)
只需将getFragmentManager()更改为getSupportFragmentManager()
答案 3 :(得分：1)
下面是一个人在扫描网络时发现的一个例子，这对我有用，希望它对你有帮助。
Menu_Fragment不是从android.support.v4.app.Fragment继承的。据推测，它继承自android.app.Fragment。
有两个片段实现：原生的（例如，android.app.Fragment）和backport（例如，android.support.v4.app.Fragment）。你需要保持一致。您的活动是FragmentActivity，它是backport的一部分，因此您需要从android.support.v4.app.Fragment继承您的片段。