ViewPager 初体验

最新推荐文章于 2024-08-29 08:46:29 发布

chunzhenruan2595

最新推荐文章于 2024-08-29 08:46:29 发布

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CC 4.0 BY-SA版权

原文链接：https://my.oschina.net/u/3428739/blog/880510

本文详细介绍如何使用ViewPager和PagerAdapter实现Android应用中的Tab切换功能，包括初始化ViewPager、创建PagerAdapter、设置Tab布局、处理Tab切换时的UI更新及数据刷新。

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private void initView()
    {
        mViewPager = (ViewPager) findViewById(R.id.id_viewpager);
         // tabs

         LayoutInflater mInflater = LayoutInflater.from(this);
         View tab01 = mInflater.inflate(R.layout.send_layout, null);
         View tab02 = mInflater.inflate(R.layout.inventory_layout, null);
         View tab03 = mInflater.inflate(R.layout.setting_layout, null);
         mViews.add(tab01);
         mViews.add(tab02);
         mViews.add(tab03);

         mAdapter = new PagerAdapter()
         {

        private int mChildCount = 0;
        @Override
             public void notifyDataSetChanged() {
                   mChildCount = getCount();
                   super.notifyDataSetChanged();
             }

           @Override
              public int getItemPosition(Object object)   {
                    if ( mChildCount > 0) {
                    mChildCount --;
                    return POSITION_NONE;
                    }
                    return super.getItemPosition(object);
              }

             @Override
             public void destroyItem(ViewGroup container, int position,
                     Object object)
             {
                 container.removeView(mViews.get(position));
                 Log.d("TEST_DEBUG", "remove view, the position is:" + String.valueOf(position) );
             }

             @Override
             public Object instantiateItem(ViewGroup container, int position)
             {
                 View view = mViews.get(position);
                 container.addView(view);
                 Log.d("TEST_DEBUG", "instantiateItem view, the position is:"+String.valueOf(position));

            switch (position)
            {
            case 0:
                  // initBox();
             BoxAdapter adapter = new BoxAdapter(MainActivity.this, R.layout.boxview, boxList);
            ListView listView = (ListView)view.findViewById(R.id.list_view);
               listView.setAdapter(adapter);


           listView.setOnItemClickListener(new OnItemClickListener() {
                @Override
                public void onItemClick(AdapterView<?> parent, View view,
                int position, long id)
                {
                InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                imm.hideSoftInputFromWindow(view.getWindowToken(), 0);
               Box mbox = boxList.get(position);
             // mbox.setImageId(R.drawable.box_status_open);
               notifyDataSetChanged();

             //TO do action when click item
                  }
                });

                   //EditText msg = (EditText)findViewById(R.id.edit_text);
                   //msg.setText("this is a test");
            break;
            case 1:
             BoxAdapter adapterinventory = new BoxAdapter(MainActivity.this, R.layout.boxview, inventoryList);
            ListView listViewinventory = (ListView)view.findViewById(R.id.inventory_view);
            listViewinventory.setAdapter(adapterinventory);

             break;
            case 2:

             TextView settingUser = (TextView) findViewById(R.id.setting_userinfo);
              StringBuilder boxinfo = new StringBuilder();
             boxinfo.append("xx: ");
             boxinfo.append(userinfo.getaccount().toString());
             boxinfo.append("\n");

             boxinfo.append("xx: ");
             boxinfo.append(userinfo.getname().toString());
             boxinfo.append("\n");

             boxinfo.append("xx: ");
             boxinfo.append(userinfo.getphone().toString());
             boxinfo.append("\n");

             boxinfo.append("xxx: ");
             boxinfo.append(userinfo.getdistributeId().toString());
             boxinfo.append("\n");

             if (!userinfo.getaddr().equals(""))
             {
             boxinfo.append("xxx: ");
             boxinfo.append(userinfo.getaddr().toString());
             }

             settingUser.setText(boxinfo.toString());


             Button configbutton = (Button) findViewById(R.id.reedit);

             configbutton.setOnClickListener(new OnClickListener()
                   {
                  public void onClick(View v)
                  {
                     setContentView(configView);
                     ((EditText)findViewById(R.id.reg_account)).setText(userinfo.getaccount());
                     ((EditText)findViewById(R.id.reg_account)).setEnabled(false);

                     ((EditText)findViewById(R.id.reg_pwd)).setText("");

                      ((EditText)findViewById(R.id.reg_pwd_confirm)).setText("");

                    ((EditText)findViewById(R.id.reg_realname)).setText(userinfo.getname());

                    ((EditText)findViewById(R.id.reg_phone)).setText(userinfo.getphone());

                    ((EditText)findViewById(R.id.reg_distributionId)).setText(userinfo.getdistributeId());

                    ((EditText)findViewById(R.id.reg_addr)).setText(userinfo.getaddr());

                    Button regbutton = (Button) findViewById(R.id.submit_recfg);
                         regbutton.setOnClickListener(new OnClickListener()
                         {
                          public void onClick(View v)
                          {
                             Toast.makeText(MainActivity.this,"Update data sucessfully...", 0).show();
                            onBackPressed();
                          }
                         });

                  }
                   });

             ToggleButton ctrlButton = (ToggleButton) findViewById(R.id.opencontroller);

             ctrlButton.setOnClickListener(new OnClickListener()
             {
                 public void onClick(View v)
                 {
                    Toast.makeText(MainActivity.this,"Start the service sucessfully...", 0).show();
                   Intent searchintent = new Intent(MainActivity.this, BluetoothService.class);
                   startService(searchintent);
                 // onBackPressed();
                 }
             });



                   Button logoutbutton = (Button) findViewById(R.id.logout);// 退出返回到login 界面

                   logoutbutton.setOnClickListener(new OnClickListener()
                 {
                public void onClick(View v)
                {
                           Intent loginintent = new Intent(MainActivity.this, login.class);
                           startActivity(loginintent);
                  finish();
                }
                 });
             break;
            default:
            break;
            }

                 return view;
             }

             @Override
             public boolean isViewFromObject(View arg0, Object arg1)
             {
                 return arg0 == arg1;
             }

             @Override
             public int getCount()
             {
                 return mViews.size();
             }

             @Override
                public void setPrimaryItem(View container, int position, Object object)
             {
                 //把这个position赋值到一个全局变量，通过这个就会知道滑动到哪个页面了
            Log.d("TEST_DEBUG", "setPrimaryItem, The position is:"+String.valueOf(position));
            switch (position)
           {
           case 0:
                sendbutton.setImageResource(R.drawable.box_send);
                inventorybutton.setImageResource(R.drawable.box_inventory_org);
                settingbutton.setImageResource(R.drawable.box_setting_org);
           break;
           case 1:
               sendbutton.setImageResource(R.drawable.box_send_org);
               inventorybutton.setImageResource(R.drawable.box_inventory);
               settingbutton.setImageResource(R.drawable.box_setting_org);
            break;
           case 2:
               sendbutton.setImageResource(R.drawable.box_send_org);
               inventorybutton.setImageResource(R.drawable.box_inventory_org);
               settingbutton.setImageResource(R.drawable.box_setting);
            break;
           default:
           break;
           }

             }