Android使用fragment实现左侧导航

public class MainActivity extends FragmentActivity {  // private Handler handler;  private ViewPager fragmentViewPager;  private ListView leftListView;  private List<Fragment> fragmentlist;  private Fragment1 fragment1;  private Fragment2 fragment2;  private ArrayList<String> leftlist = new ArrayList<String>();// left list      private ListAdapter listAdapter = null;  @Override  protected void onCreate(Bundle savedInstanceState) {   // TODO Auto-generated method stub   super.onCreate(savedInstanceState);   setContentView(R.layout.activity_main);   fragmentViewPager = (ViewPager) findViewById(R.id.fragmentViewPager);   leftListView = (ListView) findViewById(R.id.leftListView);    initDatas();// left初始化。   initDatasViewPager();   // aTextViewCallBack back = (aTextViewCallBack)   // findViewById(R.id.aTextViewCallBack);   // back.setCalBack(new calBack() {   // @Override   // public void onclick() {   // // TODO Auto-generated method stub   // Toast.makeText(MainActivity.this, "这是回调的点击事件哦~",   // Toast.LENGTH_LONG).show();   // }   // });   //   // new Thread(new Runnable() {   //   // @Override   // public void run() {   // // TODO Auto-generated method stub   // String str = "http://www.easyicon.net/";   // String st = getHtmlByURL.getHtmlByURL(str);   // Message msg = handler.obtainMessage(0,st);   // handler.sendMessage(msg);   // }   // }).start();   // handler = new Handler() {   // public void handleMessage(Message msg) {   // super.handleMessage(msg);   // String x = msg.obj.toString();   // Log.i("GEtHtml", x);   // };   // };  }   public void initDatas() {   for (int i = 0; i < 5; i++) {    leftlist.add("第" + i + "个");    Log.i("65", leftlist.get(i).toString());   }    ArrayList<ButtonView> buttonListView = new ArrayList<ButtonView>();   ButtonView a = new ButtonView(R.string.pay_name_weixin);   buttonListView.add(a);   ButtonView b = new ButtonView(R.string.pay_name_alipay);   buttonListView.add(b);      listAdapter = new ListAdapter(buttonListView);   leftListView.setAdapter(listAdapter);   leftListView.setDividerHeight(0);   // listview点击事件   leftListView.setOnItemClickListener(new OnItemClickListener() {    @Override    public void onItemClick(AdapterView<?> parent, View view,      int position, long id) {     Log.e("tag", Integer.toString(position));     // TODO Auto-generated method stub     listAdapter.setSelectedPosition(position);     listAdapter.notifyDataSetInvalidated();     if (position % 2 == 1) {      fragmentViewPager.setCurrentItem(1);     }else{      fragmentViewPager.setCurrentItem(0);     }    }   });  }   public void initDatasViewPager() {   fragmentlist = new ArrayList<Fragment>();   fragment1 = new Fragment1();//   fragment2 = new Fragment2();//   fragmentlist.add(fragment1);   fragmentlist.add(fragment2);   fragmentViewPager.setAdapter(new FragmentAdapter(     getSupportFragmentManager(), fragmentlist, this));   fragmentViewPager.setOnPageChangeListener(new MyOnPageChangeListener());  }   // set OnPageChangeListener in inner class  class MyOnPageChangeListener implements OnPageChangeListener {    @Override   public void onPageScrollStateChanged(int arg0) {    // TODO Auto-generated method stub    }    @Override   public void onPageScrolled(int arg0, float arg1, int arg2) {    // TODO Auto-generated method stub    }   /**    * 当点击不同id的ViewPage的时候才触发    * */   @Override   public void onPageSelected(int arg0) {    Log.e("tag1", Integer.toString(arg0));    switch (arg0) {    case 0:      break;    case 1:      break;    case 2:      break;    }   }   }   public class ListAdapter extends BaseAdapter {    ArrayList<ButtonView> arrayList = null;   LayoutInflater inflater;   View view;   ButtonLayoutHolder buttonLayoutHolder;   LinearLayout buttonLayout = null;   TextView buttonText = null;    private int selectedPosition = -1;// 选中的位置    public ListAdapter(ArrayList<ButtonView> buttonListView) {    // TODO Auto-generated constructor stub    arrayList = buttonListView;   }    @Override   public int getCount() {    // TODO Auto-generated method stub    return arrayList.size();   }    @Override   public Object getItem(int position) {    // TODO Auto-generated method stub    return arrayList.get(position);   }    @Override   public long getItemId(int position) {    // TODO Auto-generated method stub    return position;   }    public void setSelectedPosition(int position) {    selectedPosition = position;   }    @Override   public View getView(int position, View convertView, ViewGroup parent) {    // TODO Auto-generated method stub    inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);    view = inflater.inflate(R.layout.button_layout, null, false);    buttonLayoutHolder = (ButtonLayoutHolder) view.getTag();     if (buttonLayoutHolder == null) {     buttonLayoutHolder = new ButtonLayoutHolder();     buttonLayoutHolder.buttonLayout = (LinearLayout) view       .findViewById(R.id.LinearLayoutButton);     buttonLayoutHolder.textView = (TextView) view       .findViewById(R.id.TextViewButton);     view.setTag(buttonLayoutHolder);    }    buttonLayout = buttonLayoutHolder.buttonLayout;    buttonText = buttonLayoutHolder.textView;    if (selectedPosition == position) {     buttonText.setSelected(true);     buttonText.setPressed(true);     buttonLayout.setBackgroundColor(Color.parseColor("#e4e8e9"));     buttonText.setTextColor(Color.BLUE);         } else {     buttonText.setSelected(false);     buttonText.setPressed(false);     buttonLayout.setBackgroundColor(Color.parseColor("#2f4471"));     buttonText.setTextColor(Color.WHITE);     }    buttonText.setHeight(40);    buttonText.setText(arrayList.get(position).textViewId);    return view;    }   }; } class ButtonView {  int textViewId;   ButtonView(int tId) {   textViewId = tId;  } }  class ButtonLayoutHolder {  LinearLayout buttonLayout;  TextView textView; } FragmentAdapter.java[java] view plain copypublic class FragmentAdapter extends FragmentPagerAdapter{  private List<Fragment> listmVp;  private Context context;    public FragmentAdapter(FragmentManager fm, List<Fragment> listmVp,Context context) {   super(fm);   this.listmVp = listmVp;   this.context = context;  }  @Override  public int getCount() {   // TODO Auto-generated method stub   return listmVp.size();  }   @Override  public Fragment getItem(int arg0) {   // TODO Auto-generated method stub   return listmVp.get(arg0);  } } 

public class Fragment1 extends Fragment{  @Override  public View onCreateView(LayoutInflater inflater, ViewGroup container,    Bundle savedInstanceState) {   // TODO Auto-generated method stub   return inflater.inflate(R.layout.fragment1, container, false);  } } 

public class Fragment2 extends Fragment{  @Override  public View onCreateView(LayoutInflater inflater, ViewGroup container,    Bundle savedInstanceState) {   // TODO Auto-generated method stub   return inflater.inflate(R.layout.fragment2, container, false);  } }