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;
    }
}