無法解析android studio中的方法getSupportFragmentManager（）

Question

我在android studio中創建了簡單的應用程序。即時通訊使用NavigationDrawerFragment ..即時通訊插入日期選取器的編碼，但我在getSupportFragmentManager得到一個錯誤（）方法

這裏我充滿主要活動代碼：

package com.example.clive.mydatepickerapp; 
 

 
import android.app.Activity; 
 

 
import android.app.ActionBar; 
 
import android.app.Fragment; 
 
import android.app.FragmentManager; 
 
import android.content.Context; 
 
import android.os.Build; 
 
import android.os.Bundle; 
 
import android.support.v4.app.DialogFragment; 
 
import android.view.Gravity; 
 
import android.view.LayoutInflater; 
 
import android.view.Menu; 
 
import android.view.MenuItem; 
 
import android.view.View; 
 
import android.view.ViewGroup; 
 
import android.support.v4.widget.DrawerLayout; 
 
import android.widget.ArrayAdapter; 
 
import android.widget.TextView; 
 
import android.support.v4.app.FragmentActivity; 
 

 

 
public class MainActivity extends Activity 
 
     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; 
 

 
    @Override 
 
    protected void onCreate(Bundle savedInstanceState) { 
 
     super.onCreate(savedInstanceState); 
 
     setContentView(R.layout.activity_my); 
 

 

 

 
     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)); 
 
    } 
 

 
    public void doDatePicker(View view) { 
 
     DialogFragment myDatePickerFragment = new MyDatePickerFragment(); 
 
     myDatePickerFragment.show(getSupportFragmentManager(), "datePicker"); 
 
    } 
 

 
    @Override 
 
    public void onNavigationDrawerItemSelected(int position) { 
 
     // update the main content by replacing fragments 
 
     FragmentManager fragmentManager = getFragmentManager(); 
 
     fragmentManager.beginTransaction() 
 
       .replace(R.id.container, PlaceholderFragment.newInstance(position + 1)) 
 
       .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; 
 
     } 
 
    } 
 

 
    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, 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(); 
 

 
     //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, container, false); 
 
      return rootView; 
 
     } 
 

 
     @Override 
 
     public void onAttach(Activity activity) { 
 
      super.onAttach(activity); 
 
      ((MainActivity) activity).onSectionAttached(
 
        getArguments().getInt(ARG_SECTION_NUMBER)); 
 
     } 
 
    } 
 

 
}

請人幫助！

Answer 1

如果您正在使用支持片段級，即你必須

import android.support.v4.app.Fragment; 

Answer 2

，而不是Activity這隻會工作：

public class MainActivity extends Activity 

延長FragmentActivity：

public class MainActivity extends FragmentActivity 

，並確保您正在導入SupportLibrary：

import android.support.v4.app.Fragment; 

爲了使用getSupportFragmentManager()

Answer 3

我有同樣的問題。然後我用getFragmentManager()替換了getSupportFragmentManager()，它工作！

我使用這2個進口：

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

而且我MainActivity擴展Activity類。

Answer 4

有這些問題很多次。什麼工作對我來說是：

只需使用AppCompatActivity延長主類比通常活動

簡而言之：

更換Acivity與AppCompatActivity

Answer 5

而不是 公衆class MainActivity extends Activity

做

公共類MainActivity擴展AppCompatActivity它支持片段經理