AndroidLayoutPagerInflater.java

public class AndroidLayoutPagerInflater implements IPagerInflater {

	public static final String TAG = AndroidLayoutPagerInflater.class
			.getSimpleName();

	private String mBaseResPath;
	private Context mContext;
	private String mViewPackage;

	public AndroidLayoutPagerInflater(Context context, String baseResPath,
			String viewPackage) {
		mContext = context;
		mBaseResPath = baseResPath;
		mViewPackage = viewPackage + ".";
	}

	@SuppressWarnings({ "rawtypes", "unchecked" })
	private View onCreateView(View parent, String name, AttributeSet attrs) {
		try {
			Class clazz = Class.forName(mViewPackage + name);
			Constructor constructor = clazz.getConstructor(Context.class,
					AttributeSet.class);
			Object v = constructor.newInstance(mContext, attrs);
			if (v instanceof View) {
				if (parent != null && parent instanceof ViewGroup) {
					ViewGroup vg = (ViewGroup) parent;
					LayoutParams lp = vg.generateLayoutParams(attrs);
					if(lp != null) {
						vg.addView((View) v, lp);
					}
					else {
						vg.addView((View)v);
					}
				}
				return (View) v;
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}

	@Override
	public boolean identify(String src) {
		if (src.endsWith(".xml")) {
			File file = new File(mBaseResPath + src);
			if (file.exists()) {
				return true;
			}
		}
		return false;
	}

	@Override
	public View inflate(String src) {
		InputStream input = null;
		try {
			File file = new File(mBaseResPath + src);
			input = new FileInputStream(file);

			XmlPullParser xpp = Xml.newPullParser();
			xpp.setInput(input, "utf-8");

			Stack<View> viewStack = new Stack<View>();
			List<View> retViews = new ArrayList<View>();

			int eventCode = xpp.getEventType();
			while (eventCode != XmlPullParser.END_DOCUMENT) {
				switch (eventCode) {
				case XmlPullParser.START_TAG:
					String name = xpp.getName();
					Log.d(TAG,
							"Found TAG name=" + name + " cnt="
									+ xpp.getAttributeCount());
					AttributeSet attrs = Xml.asAttributeSet(xpp);
					View parent = null;
					if (!viewStack.isEmpty()) {
						parent = viewStack.peek();
						if (parent != null && !(parent instanceof ViewGroup)) {
							Log.w(TAG,
									"Parent "
											+ parent.toString()
											+ " is not a ViewGroup, ignore its sub views");
							continue;
						}
					}
					View v = onCreateView(parent, name, attrs);
					viewStack.push(v);
					if (v == null) {
						Log.w(TAG, "CreateView [" + name + "] failed");
					}
					break;

				case XmlPullParser.END_TAG:
					String name1 = xpp.getName();
					Log.d(TAG, "END_TAG TAG name=" + name1);
					View v1 = viewStack.pop();
					if (viewStack.isEmpty() && v1 != null) {
						Log.d(TAG, "Found root view:" + name1);
						retViews.add(v1);
					}
					break;

				default:
					break;
				}
				eventCode = xpp.next();
			}

			int retCnt = retViews.size();
			if (retCnt == 1) {
				Log.d(TAG, "One view was created, return it.");
				return retViews.get(0);
			} else if (retCnt > 1) {
				Log.d(TAG,
						retCnt
								+ "views were created, will new a FrameLayout return it.");
				FrameLayout root = new FrameLayout(mContext);
				for (View v : retViews) {
					root.addView(v);
				}
				return root;
			}
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				input.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}

		return null;
	}

}