FixedOnActivityResultBugFragment.java

package com.wangbb.naruto.app.fragment;

import android.content.Intent;
import android.support.v4.app.Fragment;
import android.util.SparseIntArray;

import java.lang.reflect.Field;
import java.util.List;

/**
 * User: qii Date: 13-9-8
 * <p/>
 * see https://code.google.com/p/android/issues/detail?id=40537
 * <p/>
 * nested fragment wont receive onActivityResult, 2013.9.8
 */
public class FixedOnActivityResultBugFragment extends Fragment {

	private final SparseIntArray mRequestCodes = new SparseIntArray();

	/**
	 * Registers request code (used in
	 * {@link #startActivityForResult(android.content.Intent, int)}).
	 *
	 * @param requestCode
	 *            the request code.
	 * @param id
	 *            the fragment ID (can be {@link Fragment#getId()} of
	 *            {@link Fragment#hashCode()}).
	 */
	public void registerRequestCode(int requestCode, int id) {
		mRequestCodes.put(requestCode, id);
	}// registerRequestCode()

	@Override
	public void startActivityForResult(Intent intent, int requestCode) {
		if (getParentFragment() instanceof FixedOnActivityResultBugFragment) {
			((FixedOnActivityResultBugFragment) getParentFragment())
					.registerRequestCode(requestCode, hashCode());
			getParentFragment().startActivityForResult(intent, requestCode);
		} else {
			super.startActivityForResult(intent, requestCode);
		}
	}// startActivityForResult()

	@Override
	public void onActivityResult(int requestCode, int resultCode, Intent data) {
		if (!checkNestedFragmentsForResult(requestCode, resultCode, data))
			super.onActivityResult(requestCode, resultCode, data);
	}// onActivityResult()

	/**
	 * Checks to see whether there is any children fragments which has been
	 * registered with {@code requestCode} before. If so, let it handle the
	 * {@code requestCode}.
	 *
	 * @param requestCode
	 *            the code from {@link #onActivityResult(int, int, android.content.Intent)}.
	 * @param resultCode
	 *            the code from {@link #onActivityResult(int, int, android.content.Intent)}.
	 * @param data
	 *            the data from {@link #onActivityResult(int, int, android.content.Intent)}.
	 * @return {@code true} if the results have been handed over to some child
	 *         fragment. {@code false} otherwise.
	 */
	protected boolean checkNestedFragmentsForResult(int requestCode,
			int resultCode, Intent data) {
		final int id = mRequestCodes.get(requestCode);
		if (id == 0)
			return false;

		mRequestCodes.delete(requestCode);

		List<Fragment> fragments = getChildFragmentManager().getFragments();
		if (fragments == null)
			return false;

		for (Fragment fragment : fragments) {
			if (fragment.hashCode() == id) {
				fragment.onActivityResult(requestCode, resultCode, data);
				return true;
			}
		}

		return false;
	}// checkNestedFragmentsForResult()

	@Override
	public void onDetach() {
		super.onDetach();
		try {
			Field childFragmentManager = Fragment.class
					.getDeclaredField("mChildFragmentManager");
			childFragmentManager.setAccessible(true);
			childFragmentManager.set(this, null);

		} catch (NoSuchFieldException e) {
			throw new RuntimeException(e);
		} catch (IllegalAccessException e) {
			throw new RuntimeException(e);
		}
	}

}