Fragment的创建以及与activity的参数传递

点击下面不同的TextView变化不同的Fragment

avtivity与Fragment之间传递消息不能使用构造器传递，用bunder传递

首先写一个含有FrameLayout（这个布局最佳），里面最好没有其他的控件的xml：

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical"
     tools:context="com.zzw.testfragment.MainActivity" >

     <FrameLayout
         android:id="@+id/framelayout"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:layout_weight="1" >
     </FrameLayout>

     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:orientation="horizontal" >

         <TextView
             android:id="@+id/weixin"
             android:layout_width="wrap_content"
             android:layout_height="match_parent"
             android:layout_weight="1"
             android:gravity="center"
             android:text="军事"
             android:textColor="@android:color/holo_red_light"
             android:textSize="30sp" />

         <TextView
             android:id="@+id/tongxinlu"
             android:layout_width="wrap_content"
             android:layout_height="match_parent"
             android:layout_weight="1"
             android:gravity="center"
             android:text="IT"
             android:textColor="@android:color/holo_green_light"
             android:textSize="30sp" />

         <TextView
             android:id="@+id/faxian"
             android:layout_width="wrap_content"
             android:layout_height="match_parent"
             android:layout_weight="1"
             android:gravity="center"
             android:text="娱乐"
             android:textColor="@android:color/holo_orange_light"
             android:textSize="30sp" />

         <TextView
             android:id="@+id/me"
             android:layout_width="wrap_content"
             android:layout_height="match_parent"
             android:layout_weight="1"
             android:gravity="center"
             android:text="音乐"
             android:textColor="@android:color/holo_blue_light"
             android:textSize="30sp" />
     </LinearLayout>

 </LinearLayout>

写一个每一个界面要显示item.xml：

 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent" >

     <ImageView
         android:id="@+id/image"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_centerInParent="true" />

     <TextView
         android:id="@+id/textView"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignParentTop="true"
         android:layout_centerHorizontal="true"
         android:textColor="@android:color/holo_red_light"
         android:textSize="20sp"
         android:textStyle="bold" />

 </RelativeLayout>

写一个继承Fragment的类：

 package com.zzw.testfragment;

 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.ImageView;
 import android.widget.TextView;

 public class TestFragment extends Fragment {
     private static final String TAG = "TestFragment";
     int image_id;
     String content;
     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         Bundle b = this.getArguments();
         image_id = b.getInt("IMAGE");
         content = b.getString("CONTENT");
         Log.d(TAG, image_id+"--"+content);
     }

     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
         View view = inflater.inflate(R.layout.item_start, null);
         return view;
     }

     @Override
     public void onViewCreated(View view, Bundle savedInstanceState) {

         ImageView image = (ImageView) view.findViewById(R.id.image);

         image.setImageResource(image_id);

         TextView textView = (TextView) view.findViewById(R.id.textView);

         textView.setText(content);
     }

 }

MainActivity：

 package com.zzw.testfragment;

 import android.app.Activity;
 import android.app.Fragment;
 import android.app.FragmentManager;
 import android.app.FragmentTransaction;
 import android.os.Bundle;
 import android.view.View;
 import android.view.View.OnClickListener;
 import junit.framework.Test;
 import junit.framework.TestResult;

 public class MainActivity extends Activity implements OnClickListener {

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

         load(setFragmentData(R.drawable.a, "000"));

         findViewById(R.id.weixin).setOnClickListener(this);
         findViewById(R.id.tongxinlu).setOnClickListener(this);
         findViewById(R.id.faxian).setOnClickListener(this);
         findViewById(R.id.me).setOnClickListener(this);
     }

     @Override
     public void onClick(View v) {
         switch (v.getId()) {
         case R.id.weixin:
             load(setFragmentData(R.drawable.a, "000"));
             break;
         case R.id.tongxinlu:
             load(setFragmentData(R.drawable.d, "1111"));
             break;
         case R.id.faxian:
             load(setFragmentData(R.drawable.zzzz, "222"));
             break;
         case R.id.me:
             load(setFragmentData(R.drawable.ic_launcher, "333"));
             break;
         }
     }

     // 加载Fragment
     private void load(Fragment fragment) {
         FragmentManager fm = this.getFragmentManager();
         FragmentTransaction ft = fm.beginTransaction();
         ft.replace(R.id.framelayout, fragment);
         // addToBackStack添加到回退栈,addToBackStack与ft.add(R.id.fragment, new
         // MyFragment())效果相当
         // ft.addToBackStack("test");
         ft.commit();
     }

     // 设置要传递给Fragment的参数
     private Fragment setFragmentData(int image_id, String content) {
         Fragment f = new TestFragment();

         Bundle b = new Bundle();
         b.putInt("IMAGE", image_id);
         b.putString("CONTENT", content);

         f.setArguments(b);
         return f;
     }
 }