5.代码抽取（加载界面）

public abstract class LoadingPage extends FrameLayout {	public static final int STATE_UNKOWN = 0;	public static final int STATE_LOADING = 1;	public static final int STATE_ERROR = 2;	public static final int STATE_EMPTY = 3;	public static final int STATE_SUCCESS = 4;	public int state = STATE_UNKOWN;	private View loadingView;// 加载中的界面	private View errorView;// 错误界面	private View emptyView;// 空界面	private View successView;// 加载成功的界面	public LoadingPage(Context context) {		super(context);		init();	}	public LoadingPage(Context context, AttributeSet attrs, int defStyle) {		super(context, attrs, defStyle);		init();	}	public LoadingPage(Context context, AttributeSet attrs) {		super(context, attrs);		init();	}	private void init() {		loadingView = createLoadingView(); // 创建了加载中的界面		if (loadingView != null) {			this.addView(loadingView, new FrameLayout.LayoutParams(					LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));		}		errorView = createErrorView(); // 加载错误界面		if (errorView != null) {			this.addView(errorView, new FrameLayout.LayoutParams(					LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));		}		emptyView = createEmptyView(); // 加载空的界面		if (emptyView != null) {			this.addView(emptyView, new FrameLayout.LayoutParams(					LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));		}		showPage();// 根据不同的状态显示不同的界面	}	// 根据不同的状态显示不同的界面	private void showPage() {		if (loadingView != null) {			loadingView.setVisibility(state == STATE_UNKOWN					|| state == STATE_LOADING ? View.VISIBLE : View.INVISIBLE);		}		if (errorView != null) {			errorView.setVisibility(state == STATE_ERROR ? View.VISIBLE					: View.INVISIBLE);		}		if (emptyView != null) {			emptyView.setVisibility(state == STATE_EMPTY ? View.VISIBLE					: View.INVISIBLE);		}		if (state == STATE_SUCCESS) {			if (successView == null) {				successView = createSuccessView();				this.addView(successView, new FrameLayout.LayoutParams(						LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));			}			successView.setVisibility(View.VISIBLE);		} else {			if (successView != null) {				successView.setVisibility(View.INVISIBLE);			}		}	}	/* 创建了空的界面 */	private View createEmptyView() {		View view = View.inflate(UiUtils.getContext(), R.layout.loadpage_empty,				null);		return view;	}	/* 创建了错误界面 */	private View createErrorView() {		View view = View.inflate(UiUtils.getContext(), R.layout.loadpage_error,				null);		Button page_bt = (Button) view.findViewById(R.id.page_bt);		page_bt.setOnClickListener(new OnClickListener() {			@Override			public void onClick(View v) {				show();			}		});		return view;	}	/* 创建加载中的界面 */	private View createLoadingView() {		View view = View.inflate(UiUtils.getContext(),				R.layout.loadpage_loading, null);		return view;	}	public enum LoadResult {		error(2), empty(3), success(4);		int value;		LoadResult(int value) {			this.value = value;		}		public int getValue() {			return value;		}	}	// 根据服务器的数据 切换状态	public void show() {		if (state == STATE_ERROR || state == STATE_EMPTY) {			state = STATE_LOADING;		}		// 请求服务器 获取服务器上数据 进行判断		// 请求服务器 返回一个结果		ThreadManager.getInstance().createLongPool().execute(new Runnable() {						@Override			public void run() {				SystemClock.sleep(2000);				final LoadResult result = load();				UiUtils.runOnUiThread(new Runnable() {					@Override					public void run() {						if (result != null) {							state = result.getValue();							showPage(); // 状态改变了,重新判断当前应该显示哪个界面						}					}				});			}		});						showPage();	}	/***	 * 创建成功的界面	 * 	 * @return	 */	public abstract View createSuccessView();	/**	 * 请求服务器	 * 	 * @return	 */	protected abstract LoadResult load();}

	/**	 * 把Runnable 方法提交到主线程运行	 * @param runnable	 */	public static void runOnUiThread(Runnable runnable) {		// 在主线程运行		if(android.os.Process.myTid()==BaseApplication.getMainTid()){			runnable.run();		}else{			//获取handler  			BaseApplication.getHandler().post(runnable);		}	}

public class BaseApplication extends Application {	private static BaseApplication application;	private static int mainTid;	private static Handler handler;	@Override//  在主线程运行的	public void onCreate() {		super.onCreate();		application=this;		mainTid = android.os.Process.myTid();		handler=new Handler();	}	public static Context getApplication() {		return application;	}	public static int getMainTid() {		return mainTid;	}	public static Handler getHandler() {		return handler;	}		}

public abstract class BaseFragment extends Fragment {	private LoadingPage loadingPage;	protected BitmapUtils bitmapUtils;	@Override	public View onCreateView(LayoutInflater inflater, ViewGroup container,			Bundle savedInstanceState) {		bitmapUtils = BitmapHelper.getBitmapUtils();		if (loadingPage == null) { // 之前的frameLayout 已经记录了一个爹了 爹是之前的ViewPager			loadingPage = new LoadingPage(getActivity()) {				@Override				public View createSuccessView() {					return BaseFragment.this.createSuccessView();				}				@Override				protected LoadResult load() {					return BaseFragment.this.load();				}			};		} else {			ViewUtils.removeParent(loadingPage);// 移除frameLayout之前的爹		}		return loadingPage; // 拿到当前viewPager 添加这个framelayout	}	/***	 * 创建成功的界面	 * 	 * @return	 */	public abstract View createSuccessView();	/**	 * 请求服务器	 * 	 * @return	 */	protected abstract LoadResult load();	public void show() {		if (loadingPage != null) {			loadingPage.show();		}	}	/** 校验数据 */	public LoadResult checkData(List datas) {		if (datas == null) {			return LoadResult.error;// 请求服务器失败		} else {			if (datas.size() == 0) {				return LoadResult.empty;			} else {				return LoadResult.success;			}		}	}}

public class BitmapHelper {	private BitmapHelper() {	}	private static BitmapUtils bitmapUtils;	/**	 * BitmapUtils不是单例的 根据需要重载多个获取实例的方法	 * 	 * @param appContext	 *            application context	 * @return	 */	public static BitmapUtils getBitmapUtils() {		if (bitmapUtils == null) {			// 第二个参数 缓存图片的路径 // 加载图片 最多消耗多少比例的内存（16M） 0.05-0.8f			bitmapUtils = new BitmapUtils(UiUtils.getContext(), FileUtils					.getIconDir().getAbsolutePath(), 0.3f);		}		return bitmapUtils;	}}

	public static View inflate(int id) {		return View.inflate(getContext(), id, null);	}	public static Drawable getDrawalbe(int id) {		return getResource().getDrawable(id);	}