obj Fragment错误的第二个参数types发现'Android.support.V4.app.Fragment。' 需要“Android.app.Fragment”

我不能解决为什么我的objFragment给我支持经理的问题,我得到这个错误:

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) 

它发生在这一行objFragment上: .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)); } } } 

Solutions Collecting From Web of "obj Fragment错误的第二个参数types发现'Android.support.V4.app.Fragment。' 需要“Android.app.Fragment”"

问题objFragmentfragmentManager之间的片段types不匹配。 第一个来自android.support.v4.app包,而第二个来自android.app包。

在这里 看到这个答案,以知道这两种片段之间的区别。

现在要解决这个问题,你必须处理你的导入。

要么使用import android.app.Fragment而不是import android.support.v4.app.Fragment

或者按照Modge的build议; 使用支持片段pipe理器来更新应用程序的主要内容: FragmentManager fragmentManager = getSupportFragmentManager() 。 但是你也必须改变FragmentManager本身的types; import android.app.FragmentManager import android.support.v4.app.FragmentManager;

您尝试使用非支持FragmentManager进行交易。 改变它得到一个支持。

  // update the main content by replacing fragments FragmentManager fragmentManager = getSupportFragmentManager(); fragmentManager.beginTransaction() .replace(R.id.container, objFragment) .commit(); 

只要将getFragmentManager()更改为getSupportFragmentManager()

下面是由某人扫描networking时发现的一个例子,这对我有用,希望它会帮助你。

Menu_Fragment不是从android.support.v4.app.Fragmentinheritance的。 据推测,它是从android.app.Fragmentinheritance。

有两个片段实现:原生的(例如,android.app.Fragment)和backport(例如,android.support.v4.app.Fragment)。 你需要一致。 你的活动是FragmentActivity,这是backport的一部分,所以你需要你的片段从android.support.v4.app.Fragmentinheritance。