無法將文本添加到TextView

Question

我正在使用ViewPager和PageAdapter處理片段，並且想要根據單擊哪個父節點動態地向片段添加內容。在MainActivity發送數據，這個活動收到這樣的：

intent.putExtra("biz_data", biz_data);，

intent.getStringArrayExtra("biz_data");

但是我無法編輯的片段佈局的內容。你可以在我試圖做這個活動的最終看到的，但它給我一個錯誤：

TextView tv = (TextView) findViewById(R.id.today_frag_tv); 
// tv.setEnabled(true); // gives error 
// tv.append("new stuff"); // gives error 
// tv.setText("MY Custom Stuff"); // gives error` 

---

全部活動代碼

import android.content.Intent; 
import android.os.Bundle; 
import android.support.v4.app.Fragment; 
import android.support.v4.app.FragmentManager; 
import android.support.v4.app.FragmentStatePagerAdapter; 
import android.support.v4.app.NavUtils; 
import android.support.v4.view.PagerAdapter; 
import android.support.v4.view.ViewPager; 
import android.util.Log; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.widget.TextView; 
import android.widget.Toast; 

import org.w3c.dom.Text; 

/** 
* Demonstrates a "screen-slide" animation using a {@link ViewPager}. Because {@link ViewPager} 
* automatically plays such an animation when calling {@link ViewPager#setCurrentItem(int)}, there 
* isn't any animation-specific code in this sample. 
* 
* <p>This sample shows a "next" button that advances the user to the next step in a wizard, 
* animating the current screen out (to the left) and the next screen in (from the right). The 
* reverse animation is played when the user presses the "previous" button.</p> 
* 
* @see ScreenSlidePageFragment 
*/ 
public class ScreenSlideActivity extends android.support.v4.app.FragmentActivity { 

    /* The number of pages (wizard steps) to show in this demo.*/ 
    private static final int NUM_PAGES = 3; 

    /* The pager widget, which handles animation and allows swiping horizontally to access previous 
    * and next wizard steps.*/ 
    private ViewPager mPager; 

    /* The pager adapter, which provides the pages to the view pager widget.*/ 
    private PagerAdapter mPagerAdapter; 

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

     // getting intent data 
     Intent in = getIntent(); 

     // Get JSON values from previous intent 
     final String biz_data[] = in.getStringArrayExtra("biz_data"); 


     set_fragment_data(biz_data); 

     // Instantiate a ViewPager and a PagerAdapter. 
     mPager = (ViewPager) findViewById(R.id.pager); 
     mPagerAdapter = new ScreenSlidePagerAdapter(getSupportFragmentManager()); 
     mPager.setAdapter(mPagerAdapter); 
     mPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() { 
      @Override 
      public void onPageSelected(int position) { 
       invalidateOptionsMenu(); 
      } 
     }); 
    } 

    public void onFragClick (View view){ 
     Toast.makeText(ScreenSlideActivity.this, "button", Toast.LENGTH_SHORT).show(); 
    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     super.onCreateOptionsMenu(menu); 
     getMenuInflater().inflate(R.menu.activity_screen_slide, menu); 

     // enable 'prev' and 'next' when not on first node 
     menu.findItem(R.id.action_prev).setEnabled(mPager.getCurrentItem() > 0); 
     menu.findItem(R.id.action_next).setEnabled(mPager.getCurrentItem() < (NUM_PAGES-1)); 

     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     switch (item.getItemId()) { 
      case 16908332: 
       // Navigate "up" the demo structure to the launchpad activity. 
       // See http://developer.android.com/design/patterns/navigation.html for more. 
       finish(); 
       return true; 
      case R.id.action_prev: 
       // Go to the previous step in the wizard. If there is no previous step, 
       // setCurrentItem will do nothing. 
       mPager.setCurrentItem(mPager.getCurrentItem() - 1); 
       return true; 

      case R.id.action_next: 
       // Advance to the next step in the wizard. If there is no next step, setCurrentItem 
       // will do nothing. 
       mPager.setCurrentItem(mPager.getCurrentItem() + 1); 
       return true; 
     } 

     return super.onOptionsItemSelected(item); 
    } 

    /** 
    * A simple pager adapter that represents 5 {@link ScreenSlidePageFragment} objects, in 
    * sequence. 
    */ 
    private class ScreenSlidePagerAdapter extends FragmentStatePagerAdapter { 

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

     @Override 
     public Fragment getItem(int position) { 
      return ScreenSlidePageFragment.create(position); 
     } 

     @Override 
     public int getCount() { 
      return NUM_PAGES; 
     } 
    } 

    public void set_fragment_data(String biz_data[]){ 
     // title as business name 
     setTitle(biz_data[1]); 

     TextView tv = (TextView) findViewById(R.id.today_frag_tv); 
//  tv.setEnabled(true); 
//  tv.append("new stuff"); 

//  tv.setText("MY Custom Stuff"); 

    } 
} 

Answer 1

規定由本傑明Scharbau，這已經解決了我的問題：

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

TextView tv = (TextView)rootView.findViewById(R.id.today_frag_tv); 

tv.setText("text");