fragment 动态加载

/**
 * 测试使用Fragment(动态使用) 1.
 *         使用FragmentManager和FragmentTransaction动态使用一个Fragment 2. 方式:
 *         add(viewId, fragment): 将fragment的视图添加为指定视图的子视图(加在原有子视图的后面)
 *         replace(viewId, fragment): 将fragment的视图添加为指定视图的子视图(先remove原有的子视图)
 *         remove(fragment) : 将fragment的视图移除
 *
 */
public class MainActivity extends FragmentActivity {

    public MainActivity() {
        Log.e("TAG", "MainActivity()..");
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        Log.e("TAG", "MainActivity onCreate()..");
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // 创建Fragment对象
        MyFragment1 fragment1 = new MyFragment1();
        // 得到FragmentManager
        FragmentManager manager = getSupportFragmentManager();
        // 得到FragmentTransacation
        FragmentTransaction transaction = manager.beginTransaction();
        // 添加Fragment对象并提交
        transaction.add(R.id.ll_main_container, fragment1).commit();
    }

    private MyFragment2 fragment2;
    public void showFragment2(View v) {
        // 创建Fragment对象
        fragment2 = new MyFragment2();
        // 得到FragmentManager
        FragmentManager manager = getSupportFragmentManager();
        // 得到FragmentTransacation
        FragmentTransaction transaction = manager.beginTransaction();

        //将当前操作添加到回退栈, 这样点击back回到上一个状态
        transaction.addToBackStack(null);

        // 替换Fragment对象并提交
        transaction.replace(R.id.ll_main_container, fragment2).commit();
    }

    public void deleteFragment2(View v) {

        // 得到FragmentManager
        FragmentManager manager = getSupportFragmentManager();
        // 得到FragmentTransacation
        FragmentTransaction transaction = manager.beginTransaction();
        // 移除Fragment对象并提交
        transaction.remove(fragment2).commit();
    }
}

public class MyFragment2 extends Fragment {

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

        //加载布局得到View对象并返回

        //创建一个视图对象, 设置数据并返回
        TextView  textView = new TextView(getActivity());
        textView.setText("fragment22222");

        return textView;
    }
}

public class MyFragment1 extends Fragment {

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        Log.e("TAG", "onCreateView()");
        //加载布局得到View对象并返回

        //创建一个视图对象, 设置数据并返回
        TextView  textView = new TextView(getActivity());
        textView.setText("fragment11111");
        textView.setBackgroundColor(Color.RED);

        return textView;
    }
}

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical">

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

        <Button
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:text="显示fragment2"
            android:onClick="showFragment2"/>

        <Button
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:text="移除fragment2"
            android:onClick="deleteFragment2"/>
    </LinearLayout>

    <LinearLayout
        android:id="@+id/ll_main_container"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="horizontal">
    </LinearLayout>
</LinearLayout>