如何正确使用片段

我在学习如何在Android中使用片段。我创建了单独的类和布局。我无法理解我应该如何链接它们。我的主班里究竟发生了什么？有人能够以非常基本的方式证明如何使用碎片？如何正确使用片段

2013-07-28 Kirit Thadaka

你有没有任何机会看看官方开发者文档？ http://developer.android.com/guide/components/fragments.html 另一件事可能是从向导中创建一个项目，在这个项目中可以使用实现了Fragments的完整应用程序。 – Darwind

模糊的问题。你应该自己学习谷歌，并提出具体问题还没有问。 – princepiero

在你的主类中，你产生了一个或多个片段......当你制作每个片段时，它与Activity非常相似，但有自己的生命圈（Google它）。

这里的一对片段例如：你做

public class DummySectionFragment3 extends Fragment 
{ 
    public DummySectionFragment3() { 
    } 

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

     View rootView = inflater.inflate(R.layout.exercise_layout, 
       container, false); 
     return rootView; 
    } 
}

在OnCreateView（）方法，你平时用的活动做。我的主类包含在片段之间切换的SectionsPagerAdapter（类似于API示例中的寻呼机）创建2或3个片段，并尝试它... 我没有在它上面找到任何好的示例，所以我只是尝试了上述。

来源

2013-09-26 02:43:13

-1

我用这个链接即可开始使用 http://www.techotopia.com/index.php/Using_Fragments_in_Android_-_A_Worked_Example

这家伙使用2种不同的听众，并采取在第一个片段中的用户输入。第二个片段输出数据！

Goodluck！

来源

2013-11-11 10:10:15 Quan

http://www.c-sharpcorner.com/UploadFile/2fd686/fragments/

这里有标签和碎片一个很好的链接。你也可以在你的xml中定义你的片段。

来源

2014-02-24 16:17:51 shailu0827

基本是这样的：

创建一个Activity和2 Fragments。

如果在FragmantA中发生了什么，应该在fragmentB中改变一些东西。所以活动将片段A和B链接在一起。你需要什么：一个接口。

因此，创建一个采用正确属性的方法的接口（不要忘记数据类型）。现在您可以在您的活动中实施界面。

之后，您应该在onActivityCreated方法中初始化FragmentA中的接口。执行更改并将数据发送到Activity中的interfacemethod。使用FragmentManager创建对FragmentB的引用。现在您可以将数据/更改发送到FragmentB。

我希望你明白这一点;）。欢呼声

来源

2014-04-14 21:26:00 Foo

请首先阅读this首先，我想我有很基础。下面是一个例子：

MainActivity：

public class MainActivity extends Activity implements OnClickListener{ 

private final String TAG = "MainActivity"; 
private int btn00Clicks = 0; 
private int btn01Clicks = 0; 

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

@Override 
public void onClick(View v) { 
    // TODO Auto-generated method stub 
    Fragment mSelectedFragment = null; 

    switch (v.getId()) { 
    case R.id.btn00:  
     Bundle mBundle00 = new Bundle(); 
     String clicks00 = Integer.toString(btn00Clicks); 
     mBundle00.putString("btn00_clicks", clicks00); 
     mSelectedFragment = new Fragment00(); 
     mSelectedFragment.setArguments(mBundle00); 

     if (mSelectedFragment != null) { 
      FragmentManager mFragmentManager = getFragmentManager(); 
      mFragmentManager.beginTransaction() 
      .replace(R.id.fragment00ID, mSelectedFragment).commit(); 
     } 
     btn00Clicks++; 

     break; 
    case R.id.btn01:  
     Bundle mBundle01 = new Bundle(); 
     String clicks01 = Integer.toString(btn01Clicks); 
     mBundle01.putString("btn01_clicks", clicks01); 
     mSelectedFragment = new Fragment01(); 
     mSelectedFragment.setArguments(mBundle01); 

     if (mSelectedFragment != null) { 
      FragmentManager mFragmentManager = getFragmentManager(); 
      mFragmentManager.beginTransaction() 
      .replace(R.id.fragment00ID, mSelectedFragment).commit(); 
     } 
     btn01Clicks++; 
    } 
}

}

Fragment00.java：

public class Fragment00 extends Fragment { 

private final String TAG = "Fragment00"; 
TextView mTv; 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
     Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    View view = inflater.inflate(R.layout.fragment00, null); 
    return view; 
} 

@Override 
public void onActivityCreated(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onActivityCreated(savedInstanceState); 

    mTv = (TextView) getView().findViewById(R.id.fragment00Tv00); 

    if (getArguments() != null) { 
     String str = getArguments().getString("btn00_clicks").toString(); 
     mTv.setText("the Button was clicked "+str+ " time(s)"); 
     Log.i(TAG, "onActivityCreated(): "+str); 
    }else { 
     Log.i(TAG, "onActivityCreated(): getArguments() is NULL"); 
    } 
} 

@Override 
public void onAttach(Activity activity) { 
    // TODO Auto-generated method stub 
    super.onAttach(activity); 
} 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onCreate(savedInstanceState); 
}

}

Fragment01。的java：

public class Fragment01 extends Fragment { 

private static final String TAG = "Fragment01"; 
TextView mTv; 
@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
     Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    return inflater.inflate(R.layout.fragment01, null); 
} 

@Override 
public void onActivityCreated(Bundle savedInstanceState) { 
    // TODO Auto-generated method stub 
    super.onActivityCreated(savedInstanceState); 

    mTv = (TextView) getView().findViewById(R.id.fragment01Tv00); 

    if (getArguments() != null) { 
     String str = getArguments().getString("btn01_clicks").toString(); 
     mTv.setText("the Button was clicked "+str+ " time(s)"); 
     Log.i(TAG, "onActivityCreated(): "+str); 
    }else { 
     Log.i(TAG, "onActivityCreated(): getArguments() is NULL"); 
    } 
}

}

MainActivity_layout：

<?xml version="1.0" encoding="utf-8"?> 
<FrameLayout 
xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:id="@+id/container" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
tools:context="com.example.fragments01.MainActivity" 
tools:ignore="MergeRootFrame"> 

    <RelativeLayout 
     android:id="@+id/mainRelativeLayout00" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:layout_gravity="top|center_vertical"> 
     <Button 
      android:id="@+id/btn00" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:text="fragment_one" 
      android:onClick="onClick"></Button> 
     <Button 
      android:id="@+id/btn01" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:layout_below="@+id/btn00" 
      android:text="Fragment two" 
      android:onClick="onClick"></Button> 
     <fragment 
      android:name="com.example.fragments01.Fragment00" 
      android:id="@+id/fragment00ID" 
      android:layout_width="fill_parent" 
      android:layout_height="fill_parent" 
      android:layout_below="@+id/btn01"> 
     </fragment> 
    </RelativeLayout>

Fragment00_layout.xml

<?xml version="1.0" encoding="utf-8"?> 
<FrameLayout 
xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:id="@+id/container" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
tools:context="com.example.fragments01.Fragment00" 
tools:ignore="MergeRootFrame" 
android:background="#00ffff"> 

<RelativeLayout 
     android:id="@+id/fragment00RelativeLayout00" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:layout_gravity="top|center_vertical"> 
     <TextView 
      android:id="@+id/fragment00Tv00" 
      android:layout_width="fill_parent" 
      android:layout_height="fill_parent"> 
     </TextView> 
</RelativeLayout>

Fragment01_layout.xml：

<?xml version="1.0" encoding="utf-8"?> 
<FrameLayout 
xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:id="@+id/container" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
tools:context="com.example.fragments01.Fragment01" 
tools:ignore="MergeRootFrame" 
android:background="#ffff00"> 

<RelativeLayout 
     android:id="@+id/fragment01RelativeLayout00" 
     android:layout_width="fill_parent" 
     android:layout_height="wrap_content" 
     android:layout_gravity="top|center_vertical"> 
     <TextView 
      android:id="@+id/fragment01Tv00" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:text="Fragment two"> 
     </TextView> 
     <Button 
      android:id="@+id/fragment01Btn00" 
      android:layout_width="fill_parent" 
      android:layout_height="wrap_content" 
      android:text="Button of fragment two" 
      android:layout_below="@+id/fragment01Tv00"> 
     </Button> 
</RelativeLayout>

来源

2014-05-27 20:53:00 LetsamrIt

我做了不使用ViewPager和所有的怪异的东西，只是Activity和Fragment这里Stack Overflow和相同的之间的联系的示例项目点击Code Review来展示它，点击任一链接查看该项目。

来源

2014-07-31 08:02:21 EpicPandaForce

同什么LetsAmrIt发布，只是一个例子：

主要活动：

import java.io.FileInputStream; 
import java.io.FileOutputStream; 
import java.io.ObjectInputStream; 
import java.io.ObjectOutputStream; 
import java.util.Comparator; 
import android.app.Activity; 
import android.app.Fragment; 
import android.app.FragmentManager; 
import android.app.FragmentTransaction; 
import android.content.Context; 
import android.content.Intent; 
import android.content.res.Configuration; 
import android.graphics.PixelFormat; 
import android.os.Bundle; 
import android.support.v7.app.ActionBarActivity; 
import android.util.Log; 
import android.view.Menu; 
import android.view.MenuInflater; 
import android.view.MenuItem; 
import android.view.View; 
import android.view.WindowManager; 
import android.widget.AdapterView; 
import android.widget.Toast; 
import android.widget.AdapterView.OnItemClickListener; 
import android.widget.ListView; 

public class MainActivity extends Activity implements MyListFragment.MovieSelectedListener 
    { 
     Movie movie; 
     ListView movieList; 

     @SuppressWarnings("deprecation") 
     @Override 
     protected void onCreate(Bundle savedInstanceState) 
     { 
      super.onCreate(savedInstanceState); 
      getWindow().setFormat(PixelFormat.RGBA_8888); 
      getWindow().addFlags(WindowManager.LayoutParams.FLAG_DITHER); 
      setContentView(R.layout.activity_main); 

      try 
      { 
       FileInputStream fis = openFileInput("movies"); 

       if (fis != null) 
       { 
        ObjectInputStream in = new ObjectInputStream(fis); 

        movie = (Movie) in.readObject(); 
        in.close(); 

        Toast.makeText(this, "Movies loaded.", Toast.LENGTH_SHORT).show(); 
       } 
      } 
      catch (Exception e) 
      { 
       Toast.makeText(this, "No movies to load.", Toast.LENGTH_SHORT).show(); 
      } 

      if (movie == null) 
      { 
       movie = new Movie(); 
       movie.addMovie("Harry Potter", "12 January", "Thriller", 4, "Some people", "Bad", "Someone", "Walmer Park"); 
      } 
      loadFragments(); 
     } 


     public void loadFragments() 
     { 
      if ((getResources().getConfiguration().screenLayout &Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_LARGE) 
      {  
       Log.d("Screen Size: ", "LARGE"); 
       // obtain the fragment manager 
       FragmentManager fragmentManager = getFragmentManager(); 

       // determine if the fragment has already been loaded (may have happened) 
       Fragment listfrag = fragmentManager.findFragmentById(R.id.fragment_container); 

       // place fragment into container if not already there 
       if (listfrag == null) { 
        // start a transaction that will handle the swapping in/out 
        FragmentTransaction fragmentTransaction = fragmentManager 
          .beginTransaction(); 

        // multiple additions to the transaction can be done so that they 
        // changes will be done simultaneously 
        MyListFragment fragment1 = new MyListFragment();     
        fragmentTransaction.add(R.id.fragment_container, fragment1); 

        ViewFragment fragment2 = new ViewFragment(); 
        fragmentTransaction.add(R.id.details_container, fragment2); 

        Bundle args = new Bundle(); 
        args.putSerializable("Movie", movie); 
        fragment1.setArguments(args); 

        // commit the changes, i.e. do it! 
        fragmentTransaction.commit(); 
       } 
      } 
      else if ((getResources().getConfiguration().screenLayout &  Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_NORMAL) {  
       Log.d("Screen Size: ", "NORMAL"); 
       // obtain the fragment manager 
       FragmentManager fragmentManager = getFragmentManager(); 

       // determine if the fragment has already been loaded (may have happened) 
       Fragment listfrag = fragmentManager.findFragmentById(R.id.fragment_container); 

       // place fragment into container if not already there 
       if (listfrag == null) { 
        // start a transaction that will handle the swapping in/out 
        FragmentTransaction fragmentTransaction = fragmentManager 
          .beginTransaction(); 

        // multiple additions to the transaction can be done so that they 
        // changes will be done simultaneously 
        MyListFragment fragment = new MyListFragment(); 
        fragmentTransaction.add(R.id.fragment_container, fragment); 

        Bundle args = new Bundle(); 
        args.putSerializable("Movie", movie); 
        fragment.setArguments(args); 

        // commit the changes, i.e. do it! 
        fragmentTransaction.commit(); 
       } 
      } 
      else if ((getResources().getConfiguration().screenLayout &  Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_SMALL) {  
       Log.d("Screen Size: ", "SMALL"); 
      } 
      else if ((getResources().getConfiguration().screenLayout &  Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_XLARGE) {  
       Log.d("Screen Size: ", "XLARGE"); 
       Log.d("Screen Size: ", "LARGE"); 
       // obtain the fragment manager 
       FragmentManager fragmentManager = getFragmentManager(); 

       // determine if the fragment has already been loaded (may have happened) 
       Fragment listfrag = fragmentManager.findFragmentById(R.id.fragment_container); 

       // place fragment into container if not already there 
       if (listfrag == null) { 
        // start a transaction that will handle the swapping in/out 
        FragmentTransaction fragmentTransaction = fragmentManager 
          .beginTransaction(); 

        // multiple additions to the transaction can be done so that they 
        // changes will be done simultaneously 
        MyListFragment fragment1 = new MyListFragment();     
        fragmentTransaction.add(R.id.fragment_container, fragment1); 

        ViewFragment fragment2 = new ViewFragment(); 
        fragmentTransaction.add(R.id.details_container, fragment2); 

        Bundle args = new Bundle(); 
        args.putSerializable("Movie", movie); 
        fragment1.setArguments(args); 

        // commit the changes, i.e. do it! 
        fragmentTransaction.commit(); 
       } 
      } 
      else { 
       Log.d("Screen Size: ","UNKNOWN_CATEGORY_SCREEN_SIZE"); 
      } 
     } 

     @Override 
     public boolean onCreateOptionsMenu(Menu menu) { 
      // Inflate the menu items for use in the action bar 
      MenuInflater inflater = getMenuInflater(); 
      inflater.inflate(R.menu.main, menu); 
      return true; 
     } 

     public void pushFragment(Movie curMovie) { 
      // obtain the fragment manager 
      FragmentManager fragmentManager = getFragmentManager(); 

      // start a transaction that will handle the swapping in/out 
      FragmentTransaction fragmentTransaction = fragmentManager 
        .beginTransaction(); 

      // add new fragment, BUT remember previous one, so that BACK button 
      // returns to it 
      ViewFragment fragment = new ViewFragment(); 
      fragmentTransaction.replace(R.id.fragment_container, fragment); 
      fragmentTransaction.addToBackStack("view"); 

      Bundle args = new Bundle(); 
      args.putSerializable("curMovie", curMovie); 
      fragment.setArguments(args); 

      // commit the changes, i.e. do it! 
      fragmentTransaction.commit(); 
     } 

     @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. 
      MyListFragment fragment = (MyListFragment) getFragmentManager().findFragmentById(R.id.fragment_container); 
      switch(item.getItemId()) 
      { 
      case R.id.action_about: 
       About(); 
       return true; 
      case R.id.action_add: 
       addMovie(); 
       return true; 
      case R.id.sort_Title: 
       fragment.sortTitle(); 
       return true; 
      case R.id.sort_Date: 
       fragment.sortDateViewed(); 
       return true; 
      case R.id.sort_Rating: 
       fragment.sortRating(); 
       return true; 
      default: 
       return super.onOptionsItemSelected(item); 
      } 
     } 

     @Override 
     protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
      // TODO Auto-generated method stub 

      if (requestCode == 1) 
      { 
       if (resultCode == RESULT_OK) 
       { 
        String title = data.getStringExtra("titleText"); 
        String genre = data.getStringExtra("genreText"); 
        String actors = data.getStringExtra("actorsText"); 
        int rating = data.getIntExtra("ratingValue", 0); 
        String date = data.getStringExtra("dateWatched"); 
        String watchedWith = data.getStringExtra("watchedWithText"); 
        String watchedAt = data.getStringExtra("watchedAtText"); 
        String comment = data.getStringExtra("commentText");     
        movie.addMovie(title, date, genre, rating, actors, comment, watchedWith, watchedAt); 
        write(); 
       } 
      }  
      super.onActivityResult(requestCode, resultCode, data); 
     } 

     public void write() 
     { 
      try 
      { 
       FileOutputStream fos = openFileOutput("movies", Context.MODE_PRIVATE); 
       ObjectOutputStream out = new ObjectOutputStream(fos); 
       out.writeObject(movie); 
       fos.close(); 
       Toast.makeText(this, "Movies saved.", Toast.LENGTH_SHORT).show(); 
      } 
      catch (Exception e) 
      { 
       Toast.makeText(this, "Movies could not be saved.", Toast.LENGTH_SHORT).show(); 
      } 
     } 

     public void addMovie() 
     { 
      Intent intentAdd = new Intent(MainActivity.this, AddMovie.class); 
      startActivityForResult(intentAdd, 1); 
     } 

     public void About() 
     { 
      Intent intentAbout = new Intent(this, About.class); 
      startActivity(intentAbout); 
     } 

     public void addDetails(Movie curMovie) 
     { 
      // obtain the fragment manager 
      FragmentManager fragmentManager = getFragmentManager(); 

      // start a transaction that will handle the swapping in/out 
      FragmentTransaction fragmentTransaction = fragmentManager 
        .beginTransaction(); 
      ViewFragment fragment = new ViewFragment(); 
      // REPLACE the existing fragment with another one 
      fragmentTransaction.replace(R.id.details_container, fragment); 
      Bundle args = new Bundle(); 
      args.putSerializable("curMovie", curMovie); 
      fragment.setArguments(args); 
      // commit the changes, i.e. do it! 
      fragmentTransaction.commit(); 
     } 

     @Override 
     public void onMovieSelected(String movieName) { 
      // TODO Auto-generated method stub 

      if ((getResources().getConfiguration().screenLayout &Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_LARGE) 
      {    
       Log.d("Screen Size: ", "LARGE"); 

       Movie current = movie.getMovie(movieName); 
       Context context = getApplicationContext(); 
       CharSequence text = current.MovieTitle; 
       int duration = Toast.LENGTH_SHORT; 

       Toast toast = Toast.makeText(context, text, duration); 
       toast.show(); 
       addDetails(current); 
      } 
      else if ((getResources().getConfiguration().screenLayout &  Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_NORMAL) {  
       Log.d("Screen Size: ", "NORMAL"); 


       Movie current = movie.getMovie(movieName); 
       Context context = getApplicationContext(); 
       CharSequence text = current.MovieTitle; 
       int duration = Toast.LENGTH_SHORT; 

       Toast toast = Toast.makeText(context, text, duration); 
       toast.show(); 

       pushFragment(current); 
      } 
      else if ((getResources().getConfiguration().screenLayout &  Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_SMALL) {  
       Log.d("Screen Size: ", "SMALL"); 
      } 
      else if ((getResources().getConfiguration().screenLayout &  Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_XLARGE) {  
       Log.d("Screen Size: ", "XLARGE"); 
      } 
      else { 
       Log.d("Screen Size: ","UNKNOWN_CATEGORY_SCREEN_SIZE"); 
      } 
     } 


     @Override 
     public void onDeleteSelected(String movie, MovieAdapter adapter) { 
      // TODO Auto-generated method stub 
      this.movie.deleteMovie(movie); 
      adapter.notifyDataSetChanged(); 
      write(); 
     } 
    }

电影适配器：

import java.util.List; 
import android.content.Context; 
import android.view.*; 
import android.widget.ArrayAdapter; 
import android.widget.RatingBar; 
import android.widget.TextView; 

public class MovieAdapter extends ArrayAdapter<Movie> { 
    private Context context; 
    private List<Movie> movies; 

    public MovieAdapter(Context context, List<Movie> movies) 
    { 
     super(context, R.layout.movie_layout, movies); 
     this.context = context; 
     this.movies = movies; 
    } 

    @Override 
    public View getView(int position, View convertView, ViewGroup parent) 
    { 
     View movieView = convertView; 

     if(movieView == null) 
     { 
      LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
      movieView = inflater.inflate(R.layout.movie_layout, parent, false); 
     } 

     movieView.setTag(movies.get(position)); 

     TextView txtTitle = (TextView) movieView.findViewById(R.id.txtTitle); 
     TextView txtDate = (TextView) movieView.findViewById(R.id.txtDate); 
     RatingBar ratingBar = (RatingBar) movieView.findViewById(R.id.ratingBar); 

     txtTitle.setText(movies.get(position).MovieTitle); 
     txtDate.setText("Date Viewed: "+movies.get(position).dateViewed); 
     ratingBar.setIsIndicator(true); 
     ratingBar.setNumStars(movies.get(position).rating); 
     ratingBar.setRating(movies.get(position).rating);   
     return movieView; 
    } 

}

名单片段：

import java.util.Comparator; 
import android.app.Activity; 
import android.app.AlertDialog; 
import android.app.Fragment; 
import android.content.DialogInterface; 
import android.util.Log; 
import android.os.Bundle; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.AdapterView; 
import android.widget.ListView; 
import android.widget.AdapterView.OnItemClickListener; 
import android.widget.AdapterView.OnItemLongClickListener; 
import android.widget.TextView; 

public class MyListFragment extends Fragment{ 

    Movie movie; 
    MovieAdapter adapter; 
    MovieSelectedListener callBack; 
    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) 
    { 
     View view = inflater.inflate(R.layout.list_fragment, container, false); 

     ListView movieList = (ListView)view.findViewById(R.id.movieList); 

     movieList.setOnItemClickListener(new OnItemClickListener() { 

      @Override 
      public void onItemClick(AdapterView<?> parent, View view, 
        int position, long id) { 
       // TODO Auto-generated method stub 
       TextView movie = (TextView)view.findViewById(R.id.txtTitle); 
       String title = movie.getText().toString(); 
       callBack.onMovieSelected(title); 
      } 
     });  

     if (getArguments() != null) 
      movie = (Movie)getArguments().getSerializable("Movie"); 
     Log.v("PASSED","Got here"); 
     adapter = new MovieAdapter(getActivity(), movie.movies); 
     movieList.setAdapter(adapter); 
     movieList.setLongClickable(true); 
     movieList.setOnItemLongClickListener(new OnItemLongClickListener() { 

      @Override 
      public boolean onItemLongClick(AdapterView<?> parent, final View view, 
        int position, long id) { 
       // TODO Auto-generated method stub 
       AlertDialog.Builder dialog = new AlertDialog.Builder(getActivity()); 
       dialog.setMessage("Are you sure you want to delete this movie?"); 
       dialog.setTitle("Alert Message"); 
       dialog.setCancelable(false); 
       dialog.setPositiveButton("Yes", new DialogInterface.OnClickListener() { 

        public void onClick(DialogInterface dialog, int which) { 
         // TODO Auto-generated method stub 
         TextView movie = (TextView)view.findViewById(R.id.txtTitle); 
         String title = movie.getText().toString(); 
         callBack.onDeleteSelected(title, adapter); 

        } 
       }); 
       dialog.setNegativeButton("No",new DialogInterface.OnClickListener() { 

        public void onClick(DialogInterface dialog, int which) { 
         // TODO Auto-generated method stub  
        } 
       }); 
       dialog.show(); 
       return false; 
      } 
     }); 
     return view; 
    } 


    public interface MovieSelectedListener 
    { 
     public void onMovieSelected(String movie); 
     public void onDeleteSelected(String movie, MovieAdapter adapter); 
    } 

    @Override 
    public void onAttach(Activity activity) 
    { 
     super.onAttach(activity);; 
     try 
     { 
      callBack = (MovieSelectedListener) activity; 
     } 
     catch (ClassCastException e) { 
      throw new ClassCastException(activity.toString() 
        + " must implement MovieSelectedListener"); 
     } 
    } 

    public void sortTitle() 
    { 

     adapter.sort(new Comparator<Movie>() { 
      public int compare(Movie lhs, Movie rhs) { 
       return lhs.MovieTitle.compareTo(rhs.MovieTitle); 
      } 
     }); 
     adapter.notifyDataSetChanged(); 
    } 

    public void sortDateViewed() 
    { 

     adapter.sort(new Comparator<Movie>() { 
      public int compare(Movie lhs, Movie rhs) { 
       return lhs.dateViewed.compareTo(rhs.dateViewed); 
      } 
     }); 
     adapter.notifyDataSetChanged(); 
    } 

    public void sortRating() 
    { 

     adapter.sort(new Comparator<Movie>() { 
      public int compare(Movie lhs, Movie rhs) { 
       return ((Integer)lhs.rating).compareTo(rhs.rating); 
      } 
     }); 
     adapter.notifyDataSetChanged(); 
    } 
}

查看弗拉gment

import android.app.Fragment; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.RatingBar; 
import android.widget.TextView; 

public class ViewFragment extends Fragment { 

    Movie curMovie = new Movie("Empty", "Empty", "Empty", 5, "Empty", "Empty", "Empty", "Empty"); 
    @Override 
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) 
    { 
     View view = inflater.inflate(R.layout.view_fragment, container, false); 
     if (getArguments() != null) 
      curMovie = (Movie)getArguments().getSerializable("curMovie"); 

     TextView titleTxt = (TextView)view.findViewById(R.id.titleTxt); 
     titleTxt.setText(curMovie.MovieTitle); 
     TextView genreTxt = (TextView)view.findViewById(R.id.genreTxt); 
     genreTxt.setText(curMovie.genre); 
     TextView actorsTxt = (TextView)view.findViewById(R.id.actorsTxt); 
     actorsTxt.setText(curMovie.actors); 
     RatingBar ratingRes = (RatingBar)view.findViewById(R.id.ratingRes); 
     ratingRes.setIsIndicator(true); 
     ratingRes.setNumStars(curMovie.rating); 
     ratingRes.setRating(curMovie.rating); 
     TextView dateWatchedTxt = (TextView)view.findViewById(R.id.dateWatchedTxt); 
     dateWatchedTxt.setText(curMovie.dateViewed); 
     TextView watchedWithTxt = (TextView)view.findViewById(R.id.watchedWithTxt); 
     watchedWithTxt.setText(curMovie.viewedWith); 
     TextView watchedAtTxt = (TextView)view.findViewById(R.id.watchedAtTxt); 
     watchedAtTxt.setText(curMovie.viewedWhere); 
     TextView commentTxt = (TextView)view.findViewById(R.id.commentTxt); 
     commentTxt.setText(curMovie.comments); 

     // Inflate the layout for this fragment 
     return view; 
    } 
}

电影：

import java.io.Serializable; 
import java.util.ArrayList; 
import java.util.List; 

public class Movie implements Serializable 
{ 
    String MovieTitle, dateViewed, actors, genre, comments, viewedWith, viewedWhere; 
    int rating; 
    public Movie(String MovieTitle, String dateViewed, String genre, int rating, String actors, String comments, String viewedWith, String viewedWhere) 
    { 
     this.MovieTitle = MovieTitle; 
     this.dateViewed = dateViewed; 
     this.genre = genre; 
     this.rating = rating; 
     this.actors = actors; 
     this.comments = comments; 
     this.viewedWith = viewedWith; 
     this.viewedWhere = viewedWhere; 
    } 
    final List<Movie> movies = new ArrayList<Movie>(); 

    public Movie(){  
    } 

    public void addMovie(String MovieTitle, String dateViewed, String genre, int rating, String actors, String comments, String viewedWith, String viewedWhere) 
    { 
     movies.add(new Movie(MovieTitle, dateViewed, genre, rating, actors, comments, viewedWith, viewedWhere)); 
    } 

    public void deleteMovie(String movieTitle) 
    { 
     Movie toDelete = getMovie(movieTitle); 
     movies.remove(toDelete); 
    } 

    public Movie getMovie(String movie) 
    { 
     for(Movie mov:movies) 
     { 
      if(mov.MovieTitle.equals(movie)) 
      { 
       return mov; 
      }   
     } 
     return null; 
    } 
}

添加的电影：

import java.io.FileOutputStream; 
import java.io.ObjectOutputStream; 
import android.app.Activity; 
import android.content.Context; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.widget.EditText; 
import android.widget.RatingBar; 
import android.widget.Toast; 

public class AddMovie extends Activity 
{ 
    EditText title2; 
    EditText genre2; 
    EditText actors2; 
    RatingBar rating2; 
    EditText date2; 
    EditText watchedWith2; 
    EditText watchedAt2; 
    EditText comment2; 

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

     //savedInstance 
     title2 = (EditText)findViewById(R.id.title); 
     genre2 = (EditText)findViewById(R.id.genre); 
     actors2 = (EditText)findViewById(R.id.actors); 
     rating2 = (RatingBar)findViewById(R.id.rating); 
     date2 = (EditText)findViewById(R.id.dateWatched); 
     watchedWith2 = (EditText)findViewById(R.id.watchedWith); 
     watchedAt2 = (EditText)findViewById(R.id.watchedAt); 
     comment2 = (EditText)findViewById(R.id.comment); 

     if ((savedInstanceState != null) && (savedInstanceState.containsKey("TITLE_STATE_KEY"))) 
     { 
      title2.setText(savedInstanceState.getString("TITLE_STATE_KEY")); 
      actors2.setText(savedInstanceState.getString("ACTORS_STATE_KEY")); 
      genre2.setText(savedInstanceState.getString("GENRE_STATE_KEY")); 
      comment2.setText(savedInstanceState.getString("GC_STATE_KEY")); 
      watchedWith2.setText(savedInstanceState.getString("WITH_STATE_KEY")); 
      watchedAt2.setText(savedInstanceState.getString("LOCATION_STATE_KEY")); 
      date2.setText(savedInstanceState.getString("DATE_STATE_KEY")); 
      rating2.setRating(savedInstanceState.getFloat("RATING_STATE_KEY")); 
     } 
    } 

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

    @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. 
     switch(item.getItemId()) 
     { 
     case R.id.action_settings:   
      return true; 
     case R.id.action_done: 
      done(); 
     default: 
      return super.onOptionsItemSelected(item); 
     } 
    } 

    public void done() 
    { 
     EditText title = (EditText)findViewById(R.id.title); 
     String titleText = title.getText().toString(); 

     EditText genre = (EditText)findViewById(R.id.genre); 
     String genreText = genre.getText().toString(); 

     EditText actors = (EditText)findViewById(R.id.actors); 
     String actorsText = actors.getText().toString(); 

     RatingBar rating = (RatingBar)findViewById(R.id.rating); 
     int ratingValue = Math.round(rating.getRating()); 

     EditText date = (EditText)findViewById(R.id.dateWatched); 
     String dateWatched = date.getText().toString(); 

     EditText watchedWith = (EditText)findViewById(R.id.watchedWith); 
     String watchedWithText = watchedWith.getText().toString(); 

     EditText watchedAt = (EditText)findViewById(R.id.watchedAt); 
     String watchedAtText = watchedAt.getText().toString(); 

     EditText comment = (EditText)findViewById(R.id.comment); 
     String commentText = comment.getText().toString();   

     Intent intent = new Intent(AddMovie.this, MainActivity.class); 

     intent.putExtra("titleText", titleText); 
     intent.putExtra("genreText", genreText); 
     intent.putExtra("actorsText", actorsText); 
     intent.putExtra("ratingValue", ratingValue); 
     intent.putExtra("dateWatched", dateWatched); 
     intent.putExtra("watchedWithText", watchedWithText); 
     intent.putExtra("watchedAtText", watchedAtText); 
     intent.putExtra("commentText", commentText); 
     setResult(RESULT_OK, intent); 
     finish(); 
    } 

    @Override 
    public void onSaveInstanceState(Bundle saveInstanceState) 
    { 
     saveInstanceState.putString("TITLE_STATE_KEY", title2.getText().toString()); 
     saveInstanceState.putString("GENRE_STATE_KEY", genre2.getText().toString()); 
     saveInstanceState.putString("GC_STATE_KEY", comment2.getText().toString()); 
     saveInstanceState.putString("DATE_STATE_KEY", date2.getText().toString()); 
     saveInstanceState.putString("ACTORS_STATE_KEY", actors2.getText().toString()); 
     saveInstanceState.putString("WITH_STATE_KEY", watchedWith2.getText().toString()); 
     saveInstanceState.putString("LOCATION_STATE_KEY", watchedAt2.getText().toString()); 
     saveInstanceState.putFloat("RATING_STATE_KEY", rating2.getRating()); 

     super.onSaveInstanceState(saveInstanceState); 
    } 
}

来源

2014-09-05 09:18:38

如何正确使用片段

回答

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