-----fragment的用法

package com.example.snofragment;


import java.util.LinkedList;
import java.util.List;

import android.os.Bundle;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.app.ListFragment;
import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button btn1=(Button)findViewById(R.id.button1);
        btn1.setOnClickListener(new OnClickListener()
        {
        	public void onClick(View v){
        		Log.i("snodebug","snodddddd");
        		 FragmentManager fragmentManager = getFragmentManager();  
	     	        FragmentTransaction fragmentTransaction = fragmentManager  
	     	                .beginTransaction();  
	     	       snoFragment1 fragment1 = new snoFragment1();  
	            fragmentTransaction.replace(R.id.layout1, fragment1);
	            fragmentTransaction.addToBackStack(null);    
	            fragmentTransaction.commit();  
        	}
        });
        Button btn2=(Button)findViewById(R.id.button2);
        btn2.setOnClickListener(new OnClickListener(){
        	public void onClick(View v){
        		 FragmentManager fragmentManager = getFragmentManager();  
	     	        FragmentTransaction fragmentTransaction = fragmentManager  
	     	                .beginTransaction();  
	     	       snoFragment3 fragment1 = new snoFragment3();  
	            fragmentTransaction.replace(R.id.layout2, fragment1);
	            fragmentTransaction.addToBackStack(null);   
	            fragmentTransaction.commit();  
        	}
        });
    }
    public static class snoFragment1  extends Fragment{
    	 @Override
    	    public View onCreateView(LayoutInflater inflater, ViewGroup container,  
    	            Bundle savedInstanceState) {  
    	        return inflater.inflate(R.layout.snofragment1, container, false);  
    	    }
    		@Override
    		public void onSaveInstanceState(Bundle outState) {
    			// TODO Auto-generated method stub
    			super.onSaveInstanceState(outState);
    			System.out.println("Fragment1-->onSaveInstanceState");
    			///outState.putString("curChoice", mCurCheckPosition);//保存当前的下标
    		}
    }
    public static class snoFragment2  extends ListFragment{
    	public static String[] array = { "text1,", "text2", "text3", "text4",
			"text5,", "text6", "text7", "text8" };
		@Override
		public void onActivityCreated(Bundle savedInstanceState) {
			// TODO Auto-generated method stub
			super.onActivityCreated(savedInstanceState);
			System.out.println("Fragment-->onActivityCreted");
			setListAdapter(new ArrayAdapter<String>(getActivity(),
					android.R.layout.simple_list_item_1, array));///<---这里使用系统的列表资源.
		}
		@Override
		public void onListItemClick(ListView l, View v, int position, long id) {
			// TODO Auto-generated method stub
			super.onListItemClick(l, v, position, id);
			Log.i("snoDebug","----position is :"+position);
		}
    }
    ///------------------list中放置的是按钮和各种其他的图标. 可以这样做.
    public static class snoFragment3  extends ListFragment{  ///<---在其中放置图片和文字.
    	String a = "A", b = "B", c = "C", d = "D", e = "E";
      	 private snoArrayAdapter mVideoAdapter;
		@Override
		public void onActivityCreated(Bundle savedInstanceState) {
			// TODO Auto-generated method stub
			super.onActivityCreated(savedInstanceState);
			System.out.println("Fragment-->onActivityCreted");
			List<String> list = new LinkedList<String>();
	    	list.add(a);
	    	list.add(e);
	    	list.add(d);	    	
			  mVideoAdapter = new snoArrayAdapter(getActivity(), android.R.layout.simple_list_item_1,list);
			setListAdapter(mVideoAdapter);///<---这里使用系统的列表资源.
		}
		@Override
		public void onListItemClick(ListView l, View v, int position, long id) {
			// TODO Auto-generated method stub
			super.onListItemClick(l, v, position, id);
			Log.i("snoDebug","----snoFragment3 position is :"+position);
		}
    }
    ///////////////////
    public  static class snoArrayAdapter extends ArrayAdapter<String>{
		public snoArrayAdapter(Context context, int textViewResourceId,
				List<String> objects) {
			super(context, textViewResourceId, objects);
			// TODO Auto-generated constructor stub
		}

		@Override
        public View getView(final int position, View convertView, ViewGroup parent) {
            ViewHolder holder;
            View v = convertView;
                LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                v = inflater.inflate(R.layout.video_grid_item, parent, false);
                holder = new ViewHolder();
                holder.layout = v.findViewById(R.id.layout_item);
                holder.thumbnail = (ImageView) v.findViewById(R.id.ml_item_thumbnail);
                holder.title = (TextView) v.findViewById(R.id.ml_item_title);
                holder.subtitle = (TextView) v.findViewById(R.id.ml_item_subtitle);
                holder.progress = (ProgressBar) v.findViewById(R.id.ml_item_progress);
                v.setTag(holder);
            return v;
        }
    }
    static class ViewHolder {
        boolean listmode;
        View layout;
        ImageView thumbnail;
        TextView title;
        TextView subtitle;
        ImageView more;
        ProgressBar progress;
    }
}