Android 基于GridView和ActivityGroup实现的TAB分页

分页大家都会用Android的TabHost和TabActivity的组合，今天我这里实现的是GridView和ActivityGroup实现的分页，这里需要将Activity转换成Window，然后再换成成View添加到容器中，效果如下

1.布局文件底部放一个GridView,然后一个LinearLayout容器在GridView之上，LinearLayout用于装载Activity的,这里布局位置错误，运行程序会抛异常，修改在下面

<RelativeLayout 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" >
    <LinearLayout
        android:id="@+id/activity_group"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_above="@+id/gridView1"
        android:layout_alignParentTop="true"
        android:orientation="vertical" >
    </LinearLayout>

     <GridView
        android:id="@+id/gridView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:background="@drawable/navigationbardown"
        android:cacheColorHint="@android:color/transparent"
        android:gravity="center"
        android:listSelector="@android:color/transparent"
        android:verticalSpacing="0dip" >
    </GridView>
</RelativeLayout>

2.接下来就是代码啦，我们需要设置GridView的列数mGridView.setNumColumns(mImageIds.length)，因为他只能显示一行，然后就是设置GridView点击高亮，每张图片的高亮图片都不一样的，然后就是点击不同的item进入不同的Activity,我们先用到ActivityGroup里面的 public Window startActivity(String id, Intent intent) ，将Activity转换成Window，然后通过 public abstract View getDecorView()这个抽象方法将Window转换成View,在添加到LinearLayout容器中

package com.example.tabactivity;

import android.app.ActivityGroup;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.LinearLayout;

public class TestActivity extends ActivityGroup implements OnItemClickListener {
    /**
     * Tab标签
     */
    private GridView mGridView;
    /**
     * 普通图片id数组
     */
    private int [] mImageIds;
    /**
     * 高亮图片id数组
     */
    private int [] mImageLightIds;
    /**
     * GridView 适配器
     */
    private ImageAdapter mImageAdapter;
    /**
     * 装载Activity的容器
     */
    private LinearLayout mLinearLayout;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test);

        mImageIds = new int[]{R.drawable.home, R.drawable.task, R.drawable.addrbook, R.drawable.longnormal};
        mImageLightIds = new int[]{R.drawable.home1, R.drawable.taskhl, R.drawable.addrbook1, R.drawable.longhightlight};

        mLinearLayout = (LinearLayout) findViewById(R.id.activity_group);
        mGridView = (GridView) findViewById(R.id.gridView1);
        //因为我们显示一行，列数等于数组的长度
        mGridView.setNumColumns(mImageIds.length);
        mImageAdapter = new ImageAdapter();
        mGridView.setAdapter(mImageAdapter);
        mGridView.setOnItemClickListener(this);

        startActivity(0);
    }


    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
            long id) {
        //点击设置高亮显示
        mImageAdapter.setImageLight(position);
        startActivity(position);
    }

    /**
     * 根据position跳转到不同的Activity
     * @param id
     */
    private void startActivity(int position){
        //先清除容器里面的View
        mLinearLayout.removeAllViews();
        Intent intent = null;
        if(position == 0){
            intent = new Intent(TestActivity.this, Activity_01.class);
        }else if(position == 1){
            intent = new Intent(TestActivity.this, Activity_02.class);
        }else if(position == 2){
            intent = new Intent(TestActivity.this, Activity_03.class);
        }else if(position == 3){
            intent = new Intent(TestActivity.this, Activity_04.class);
        }
        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

        //将Activity转换成View
        View view = getLocalActivityManager().startActivity("intent", intent).getDecorView();
        LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT,
                LayoutParams.FILL_PARENT));

        //将Activity转换成的View添加到容器
        mLinearLayout.addView(view, layoutParams);
    }

    /**
     * 图片适配器,没什么特别的，里面有一个设置高亮的方法比较重要
     * @author mining
     *
     */
    private class ImageAdapter extends BaseAdapter{
        private int currentItem;

        /**
         * 设置高亮显示
         * @param currentItem
         */
        public void setImageLight(int selectItem){
            this.currentItem = selectItem;
            notifyDataSetChanged();
        }

        @Override
        public int getCount() {
            return mImageIds.length;
        }

        @Override
        public Object getItem(int position) {
            return mImageIds[position];
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            if(convertView == null){
                convertView = new ImageView(TestActivity.this);
            }
            if(position == currentItem){
                convertView.setBackgroundResource(mImageLightIds[position]);
            }else{
                convertView.setBackgroundResource(mImageIds[position]);
            }

            return convertView;
        }


    }



}

代码都上完了，是不是很简单的赶脚，短短的100多行的代码就实现了Tab分页，上面有设置GridView高亮的方法，还不知道设置高亮的同学可以借鉴一下咯，呵呵， 写的不好，希望各位大牛指点指点！万分感谢

不好意思，上面的布局需要纠正下，位置放错了

<RelativeLayout 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" >

    <GridView
        android:id="@+id/gridView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:background="@drawable/navigationbardown"
        android:cacheColorHint="@android:color/transparent"
        android:gravity="center"
        android:listSelector="@android:color/transparent"
        android:verticalSpacing="0dip" >
    </GridView>

    <LinearLayout
        android:id="@+id/activity_group"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_above="@+id/gridView1"
        android:layout_alignParentTop="true"
        android:orientation="vertical" >
    </LinearLayout>



</RelativeLayout>

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