Fragment与Activity之间的完美邂逅

Fragment

Activity

看下我实现的效果图这种真的特别常见点击左边的item替换右边的布局文件

MovieContent

package view.zm.com.wyimtest.bean;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Created by zhengmin on 2017/1/11.
 */
public class MoiveContent {

    //定义一个内部类，作为系统的业务对象
    public static class Movie {
        public Integer id;
        public String title;
        public String desc;

        public Movie(Integer id, String title, String desc) {
            this.id = id;
            this.title = title;
            this.desc = desc;
        }

        @Override
        public String toString() {
            return title;
        }
    }

    //使用List集合记录系统所包含的Movie对象
    public static List ITEMS = new ArrayList<>();
    //使用Map集合记录系统所包含的Movie对象
    public static Map ITEM_MAP = new HashMap<>();

    static {
        //使用静态初始化代码，将Movie对象添加到List集合、Map集合中
        addItem(new Movie(1, "蒼井空", "这个程序员没呢应该都很清楚的哈"));
        addItem(new Movie(2, "波多野結衣", "这个宅男你们懂的哈哈"));
        addItem(new Movie(3, "咩亞洲", "老司机带带我，我得意的笑"));
        addItem(new Movie(4, "飞碟一分钟", "只是从未如此性感，飞碟一分钟开开心心"));
        addItem(new Movie(5, "锦绣未央", "代表月亮消灭您真的太美了哈"));
        addItem(new Movie(6, "七月与安生", "周冬雨与韩国欧巴一场美丽爱情的邂逅"));
        addItem(new Movie(7, "人在囧途", "王宝强之间的囧事真的好搞笑哈"));
        addItem(new Movie(8, "微微一笑很倾城", "杨洋与郑爽之间的甜蜜校园爱情"));
        addItem(new Movie(9, "猫与老鼠", "主要讲述Tom猫经常被Jaliy鼠整搞笑。"));
        addItem(new Movie(10, "美国队长3", "这部电影挺不错哦。"));
        addItem(new Movie(11, "放棄我抱緊我", "主要讲述王凯和乔任梁以及陈之间的三角恋中"));
       // addItem(new Movie(12, "那些年我们一起追过的女孩", "一本全面、深入的iOS学习书籍，從入門到搬磚。"));
    }

    private static void addItem(Movie movie) {
        ITEMS.add(movie);
        ITEM_MAP.put(movie.id, movie);
    }
}

MovieDetailFragment

package view.zm.com.wyimtest.fragment;

import android.app.Fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import view.zm.com.wyimtest.R;
import view.zm.com.wyimtest.bean.MoiveContent;


/**
 * Created by zhengmin on 2017/1/11.
 */
public class MovieDetailFragment extends Fragment {
    public static final String ITEM_ID="item_id";
    private MoiveContent.Movie movie;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //如果启动该Fragment时包含了ITEM_ID参数
        if(getArguments().containsKey(ITEM_ID)){
            movie= MoiveContent.ITEM_MAP.get(getArguments().get(ITEM_ID));
        }
    }
    //重写该方法，该方法返回的View将作为Fragment显示的组件

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View rootView=inflater.inflate(R.layout.fragment_movie_detail,container,false);
        if(movie!=null){
            ((TextView) rootView.findViewById(R.id.movie_title)).setText(movie.title);
            ((TextView) rootView.findViewById(R.id.movie_desc)).setText(movie.desc);
        }
        return rootView;
    }
}

MovieListFragment

package view.zm.com.wyimtest.fragment;

import android.app.Activity;
import android.app.ListFragment;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import view.zm.com.wyimtest.bean.MoiveContent;

/**
 * Created by zhengmin on 2017/1/11.
 */
public class MovieListFragment extends ListFragment {
    private Callbacks    mCallbacks;

    //定义一个回调接口，该Fragment所在Activity需要实现该接口
    //该Fragment将通过该接口与它所在的Activity交互
    public interface Callbacks{
        public void onItemSelected(Integer id);
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //为该ListFragment设置adapter
        setListAdapter(new ArrayAdapter(getActivity(),android.R.layout.simple_list_item_activated_1, MoiveContent.ITEMS));
    }
    //当该Fragment被添加、显示到Activity时，回调该方法

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        //如果Activity没有实现Callbacks接口，抛出异常
        if(!(activity instanceof  Callbacks)){
            throw new IllegalArgumentException("BookList所在Activity实现CallBack");
        }
        //把该Activity当成Callbacks对象
        mCallbacks= (Callbacks) getActivity();
    }

    //当该Fragment从它所属的Activity中被删除时回调该方法
    @Override
    public void onDetach() {
        super.onDetach();
        mCallbacks=null;
    }
    //当用户单击某列表时激发该回调方法

    @Override
    public void onListItemClick(ListView l, View v, int position, long id) {
        super.onListItemClick(l, v, position, id);
        //激发mCallbacks的onItemSelected方法
        mCallbacks.onItemSelected(MoiveContent.ITEMS.get(position).id);
    }
    public void setActivateOnItemClick(boolean activateOnItemClick){
        getListView().setChoiceMode(activateOnItemClick?ListView.CHOICE_MODE_SINGLE:ListView.CHOICE_MODE_NONE);
    }
}

MainActivity

package view.zm.com.wyimtest;

import android.app.Activity;
import android.os.Bundle;

import view.zm.com.wyimtest.fragment.MovieDetailFragment;
import view.zm.com.wyimtest.fragment.MovieListFragment;

public class MainActivity extends Activity implements MovieListFragment.Callbacks {

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

    }

    @Override
    public void onItemSelected(Integer id) {
        //创建Bundle对象准备向Fragment传参
        Bundle arguments=new Bundle();
        arguments.putInt(MovieDetailFragment.ITEM_ID,id);
        //创建MovieDetailFragment对象
        MovieDetailFragment movieDetailFragment =new MovieDetailFragment();
        //向fragment传参
        movieDetailFragment.setArguments(arguments);
        //使用fragment替换movie_detail_container容器当前显示的Fragment
        getFragmentManager().beginTransaction().replace(R.id.movie_detail_container, movieDetailFragment).commit();
    }
}

activity_movie_twopane

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:divider="?android:attr/dividerHorizontal"
    android:orientation="horizontal"
    android:showDividers="middle"
    android:layout_marginLeft="16dp"
    android:layout_marginRight="16dp"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <fragment
        android:id="@+id/movie_list"
        android:name="view.zm.com.wyimtest.fragment.MovieListFragment"
        android:layout_width="0dp"
        android:layout_height="match_parent"
        android:layout_weight="1"/>
    <FrameLayout
        android:id="@+id/movie_detail_container"
        android:layout_width="0dp"
        android:layout_weight="3"
        android:layout_height="match_parent">FrameLayout>

LinearLayout>

fragment_movie_detail

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent" android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="20dp"
    >
<TextView
    android:id="@+id/movie_title"
    android:layout_width="match_parent"
    style="?android:attr/textAppearanceSmall"
    android:textSize="18sp"
    android:textColor="@color/colorPrimary"
    android:layout_height="wrap_content"
    android:padding="16dp"/>
    <TextView
        android:id="@+id/movie_desc"
        style="?android:attr/textAppearanceSmall"
        android:layout_width="match_parent"
        android:textSize="18sp"
        android:gravity="center_horizontal"
        android:textColor="@color/colorAccent"
        android:layout_height="wrap_content"
        android:padding="16dp"/>
LinearLayout>

今晚到这里到时在慢慢分析代码，好困转载请注明出处
http://blog.csdn.net/qq_15950325/article/details/54356243这里写链接内容
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