/**
 * 负责装载Fragment的容器
 * @author Frodo
 */
public class LoaderActivity extends BaseActivity {

	private FrameLayout rootView;
	private Fragment rootFragment;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		rootView = new FrameLayout(this);
		rootView.setLayoutParams(new ViewGroup.LayoutParams(
				ViewGroup.LayoutParams.MATCH_PARENT,
				ViewGroup.LayoutParams.MATCH_PARENT));
		rootView.setId(getRootViewID());
		setContentView(rootView);

		Uri uri = getIntent().getData();
		if (uri == null) {
			setError(400, null);
			return;
		}

		String fragmentName = uri.getFragment();
		if (fragmentName == null) {
			setError(401, null);
			return;
		}

		if (savedInstanceState != null) {
		  return;
		}
		
		try {
			rootFragment = (Fragment) getClassLoader().loadClass(fragmentName).newInstance();
		} catch (Exception e) {
			setError(402, e);
			Log.e("loader", "load fragment failed", e);
			return;
		}

		FragmentManager fm = getSupportFragmentManager();
		FragmentTransaction ft = fm.beginTransaction();
		ft.replace(getRootViewID(), rootFragment);
//		ft.add(getRootViewID(), rootFragment);
		ft.commit();

	}
	
	/**
	 * 提供根布局的ID
	 * 
	 * @return
	 */
	protected int getRootViewID() {
		return android.R.id.primary;
	}
	
	public Fragment getRootFragment() {
		return rootFragment;
	}

	/**
	 * 加载页面遇到错误时候的处理
	 * 
	 * @param errorCode
	 * @param e
	 */
	protected void setError(int errorCode, Exception e) {
		rootView.removeAllViews();
		TextView text = new TextView(this);
		text.setText("载入页面失败 (" + (errorCode > 0 ? errorCode : -1) + ")");
		if (BuildConfig.DEBUG) {
			if (e != null) {
				text.append("\n");
				text.append(e.toString());
			}
		}
		text.setLayoutParams(new FrameLayout.LayoutParams(
				ViewGroup.LayoutParams.WRAP_CONTENT,
				ViewGroup.LayoutParams.WRAP_CONTENT, Gravity.CENTER));
		rootView.addView(text);
	}
}

Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("btm://login"));
intent.putExtra(LoginFragmentSale.SPLASH_LOGIN, true);
startActivity(intent);

public class MappingManager {

    public MyMappingManager(Context ctx) {
        super(ctx);
    }

    @Override
    protected MappingSpec read() {
        List<PageSpec> pages = new ArrayList<PageSpec>();

        // ********* 新增scheme支持在此添加项 *********
        // 依次为host、fragment（可选）、activity（可选）、是否需要login

        // 登录页面
        pages.add(new PageSpec("login", LoginFragment.class, null, false));
       
		// other页面 。。。
		
        MappingSpec mapping = new MappingSpec(BULoaderActivity.class, pages.toArray(new PageSpec[pages.size()]));
        return mapping;
    }
}

protected void doRedirect() {
		Intent orig = getIntent();
		Intent intent = new Intent(orig.getAction(), orig.getData());
		intent.putExtras(orig);
		intent = urlMap(intent);
		try {
			// 避免进入死循环
			List<ResolveInfo> l = getPackageManager().queryIntentActivities(
					intent, 0);
			if (l.size() == 1) {
				ResolveInfo ri = l.get(0);
				if (getPackageName().equals(ri.activityInfo.packageName)) {
					if (getClass().getName().equals(ri.activityInfo.name)) {
						throw new Exception("infinite loop");
					}
				}
			} else if (l.size() > 1) {
				// should not happen, do we allow this?
			}
			startActivity(intent);
			finish();
		} catch (Exception e) {
			setError(402, e);
			Log.e("app", "unable to redirect " + getIntent(), e);
		}
	}

public Intent urlMap(Intent intent) {
       do {
           Uri uri = intent.getData();
           if (uri == null) {
               break;
           }
           if (uri.getScheme() == null
                   || !PRIMARY_SCHEME.equals(uri.getScheme())) {
               break;
           }

           MappingManager mManager = mappingManager();
           if (mManager == null) {
               break;
           }

           MappingSpec mSpec = mManager.mappingSpec();
           if (mSpec == null) {
               break;
           }

           String host = uri.getHost();
           if (TextUtils.isEmpty(host))
               break;
           host = host.toLowerCase();

           PageSpec page = mSpec.getPage(host);
           if (page == null) {
               Log.w("loader", "host (" + host
                       + ") Can't find the page in mapping.");
               break;
           }
           Class<?> fragment = page.fragment;

           intent.putExtra("_login", page.login);

           Class<?> defaultLoader = mSpec.loader;
           Class<?> loader = null;
           if (page.activity != null) {
               loader = page.activity;

           } else if (defaultLoader != null) {// defaultLoader is always null
               loader = defaultLoader;
           }

           if (loader != null) {
               intent.setClass(this, loader);

           } else {
               intent.setClass(this, LoaderActivity.class);
           }

           String query = uri.getQuery();

           uri = Uri.parse(String.format("%s://%s?%s#%s", uri.getScheme(),
                   host, query, fragment == null ? "" : fragment.getName()));
           intent.setData(uri);

       } while (false);

       return intent;
   }