無法以編程方式實現片段後編輯文本

Question

繼承人背景信息。

使用此代碼編輯文本和圖像的一些自定義的屬性（自定義字體，圖像等）

//Font Loader 
    Typeface ralewayFont = Typeface.createFromAsset(getAssets(), "fonts/raleway.ttf"); 
    Typeface abeatFont = Typeface.createFromAsset(getAssets(), "fonts/abeat.otf"); 

    TextView hiText = (TextView) findViewById(R.id.hi); 
    TextView welcomeText = (TextView) findViewById(R.id.welcome); 
    TextView chancechatText = (TextView) findViewById(R.id.chancechat); 

    hiText.setTypeface(ralewayFont); 
    welcomeText.setTypeface(ralewayFont); 
    chancechatText.setTypeface(abeatFont); 

那是一個小摘錄。它被放置在主要活動的onCreate方法下。

現在我已經實現了片段。我在哪裏實施代碼。 （我試過舊代碼，並在WelcomePage方法。在這裏，新的代碼。任何想法？另外要注意，我不得不從activity_main.xml中移動我editTexts到fragment_main_dummy.xml

public class MainActivity extends FragmentActivity { 

/** 
* The {@link android.support.v4.view.PagerAdapter} that will provide 
* fragments for each of the sections. We use a 
* {@link android.support.v4.app.FragmentPagerAdapter} derivative, which 
* will keep every loaded fragment in memory. If this becomes too memory 
* intensive, it may be best to switch to a 
* {@link android.support.v4.app.FragmentStatePagerAdapter}. 
*/ 
SectionsPagerAdapter mSectionsPagerAdapter; 

/** 
* The {@link ViewPager} that will host the section contents. 
*/ 
ViewPager mViewPager; 

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

    // Create the adapter that will return a fragment for each of the three 
    // primary sections of the app. 
    mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager()); 

    // Set up the ViewPager with the sections adapter. 
    mViewPager = (ViewPager) findViewById(R.id.pager); 
    mViewPager.setAdapter(mSectionsPagerAdapter); 


} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.main, menu); 
    return true; 
} 

/** 
* A {@link FragmentPagerAdapter} that returns a fragment corresponding to 
* one of the sections/tabs/pages. 
*/ 
public class SectionsPagerAdapter extends FragmentPagerAdapter { 

    public SectionsPagerAdapter(FragmentManager fm) { 
     super(fm); 
    } 

    @Override 
    public Fragment getItem(int position) { 
     Fragment fragment = new Fragment(); 
     switch (position) { 
     case 0: 
      return fragment = new WelcomePage(); 
     case 1: 
      return fragment = new Facebook(); 
     default: 
      break; 
     } 
     return fragment; 
    } 

    @Override 
    public int getCount() { 
     // Show 3 total pages. 
     return 3; 
    } 

    @Override 
    public CharSequence getPageTitle(int position) { 
     Locale l = Locale.getDefault(); 
     switch (position) { 
     case 0: 
      return getString(R.string.title_section1).toUpperCase(l); 
     case 1: 
      return getString(R.string.title_section2).toUpperCase(l); 
     case 2: 
      return getString(R.string.title_section3).toUpperCase(l); 
     } 
     return null; 
    } 

} 

public static class WelcomePage extends Fragment { 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
      Bundle savedInstanceState) { 

     ViewGroup rootView = (ViewGroup) inflater.inflate(
       R.layout.fragment_main_dummy, container, false); 


     return rootView; 
    } 
} 

public static class Facebook extends Fragment { 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
      Bundle savedInstanceState) { 
     ViewGroup rootView = (ViewGroup) inflater.inflate(
       R.layout.fragment_main_two, container, false); 

     return rootView; 
    } 
} 

}

Answer 1

請糾正我，如果我做出錯誤的假設，因爲我不是100％確定你想達到什麼

我建議在你的onActivityCreated（）方法內設置TextViews，因爲你沒有訪問你的根視圖在片段的onCreate（）內部修改歡迎頁片段，如下所示：

已更新，將應用程序上下文的引用傳遞給WelcomePage。

public class MainActivity extends FragmentActivity { 
    Context appContext; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     appContext = getApplicationContext(); 
    } 

public class SectionsPagerAdapter extends FragmentPagerAdapter { 

    public SectionsPagerAdapter(FragmentManager fm) { 
     super(fm); 
    } 

    @Override 
    public Fragment getItem(int position) { 
     Fragment fragment = new Fragment(); 
     switch (position) { 
     case 0: 
      return fragment = new WelcomePage(appContext); 
     case 1: 
      return fragment = new Facebook(); 
     default: 
      break; 
     } 
     return fragment; 
    } 
} 


public static class WelcomePage extends Fragment { 

    private View rootView; 
    private Context context; 

    public WelcomePage(Context c) { 
     context = c; 
    } 

    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, 
          Bundle savedInstanceState) { 
     rootView = inflater.inflate(R.layout.fragment_main_two, container, false); 
     return rootView; 
    } 

    @Override 
    public void onActivityCreated(Bundle savedInstanceState) { 
     super.onActivityCreated(savedInstanceState); 

     Typeface ralewayFont = Typeface.createFromAsset(context.getAssets(), "fonts/raleway.ttf"); 
     Typeface abeatFont = Typeface.createFromAsset(context.getAssets(), "fonts/abeat.otf"); 

     TextView hiText = (TextView) rootView.findViewById(R.id.hi); 
     TextView welcomeText = (TextView) rootView.findViewById(R.id.welcome); 
     TextView chancechatText = (TextView) rootView.findViewById(R.id.chancechat); 

     hiText.setTypeface(ralewayFont); 
     welcomeText.setTypeface(ralewayFont); 
     chancechatText.setTypeface(abeatFont); 
    } 
}