AutoLoading.java

package com.smartandroid.sa.view;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Locale;

import android.app.Activity;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.LinearLayout.LayoutParams;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.ViewSwitcher;

/**
 * 
 * @author Mehdi Sakout
 * @author Danny Tsegai
 * 
 */
public class AutoLoading {

	private View mTargetView;
	private View.OnClickListener mClickListener;
	private Context mContext;
	private LayoutInflater mInflater;
	private RelativeLayout mContainer;
	private ArrayList<View> mCustomViews;
	private ArrayList<View> mDefaultViews;
	private ViewSwitcher mSwitcher;

	// Default Tags
	private final String TAG_INTERNET_OFF = "INTERNET_OFF";
	private final String TAG_LOADING_CONTENT = "LOADING_CONTENT";
	private final String TAG_OTHER_EXCEPTION = "OTHER_EXCEPTION";

	// Default Strings
	private final String MESSAGE_LOADING = "";
	private final String TITLE_LOADING = "Loading";

	private final String MESSAGE_NO_INTERNET = "Internet is off, please enable it";
	private final String TITLE_NO_INTERNET = "Error";

	private final String MESSAGE_FAILURE = "An error has occurred, retry again";
	private final String TITLE_FAILURE = "Error";

	private final String[] mSupportedAbsListViews = new String[] { "listview",
			"gridview", "expandablelistView" };
	private final String[] mSupportedViews = new String[] { "linearlayout",
			"relativelayout", "scrollview" };

	public AutoLoading(Context context, View targetView) {
		this.mContext = context;
		this.mInflater = ((Activity) mContext).getLayoutInflater();
		this.mTargetView = targetView;
		this.mContainer = new RelativeLayout(mContext);
		this.mCustomViews = new ArrayList<View>();
		this.mDefaultViews = new ArrayList<View>();

		String type = mTargetView
				.getClass()
				.getName()
				.substring(
						mTargetView.getClass().getName().lastIndexOf('.') + 1)
				.toLowerCase(Locale.getDefault());

		if (Arrays.asList(mSupportedAbsListViews).contains(type))
			initializeAbsListView();
		else if (Arrays.asList(mSupportedViews).contains(type))
			initializeViewContainer();
		else
			throw new IllegalArgumentException(
					"TargetView type is not supported !");

	}

	public AutoLoading(Context context, int viewID) {
		this.mContext = context;
		this.mInflater = ((Activity) mContext).getLayoutInflater();
		this.mTargetView = mInflater.inflate(viewID, null, false);
		this.mContainer = new RelativeLayout(mContext);
		this.mCustomViews = new ArrayList<View>();
		this.mDefaultViews = new ArrayList<View>();

		String type = mTargetView
				.getClass()
				.getName()
				.substring(
						mTargetView.getClass().getName().lastIndexOf('.') + 1)
				.toLowerCase(Locale.getDefault());

		if (Arrays.asList(mSupportedAbsListViews).contains(type))
			initializeAbsListView();
		else if (Arrays.asList(mSupportedViews).contains(type))
			initializeViewContainer();
		else
			throw new IllegalArgumentException("ViewId type is not supported !");

	}

	private void initializeViewContainer() {

		setDefaultViews();

		mSwitcher = new ViewSwitcher(mContext);
		ViewSwitcher.LayoutParams params = new ViewSwitcher.LayoutParams(
				LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
		mSwitcher.setLayoutParams(params);

		ViewGroup group = (ViewGroup) mTargetView.getParent();
		int index = 0;
		Clonner target = new Clonner(mTargetView);
		if (group != null) {
			index = group.indexOfChild(mTargetView);
			group.removeView(mTargetView);

		}

		mSwitcher.addView(mContainer, 0);
		mSwitcher.addView(target.getmView(), 1);
		mSwitcher.setDisplayedChild(1);

		if (group != null) {
			group.addView(mSwitcher, index);
		} else {
			((Activity) mContext).setContentView(mSwitcher);
		}

	}

	private void setDefaultViews() {
		View mLayoutInternetOff = initView(
				mContext.getResources().getIdentifier("exception_no_internet",
						"layout", mContext.getPackageName()), TAG_INTERNET_OFF,
				TITLE_NO_INTERNET, MESSAGE_NO_INTERNET);
		// View mLayoutInternetOff =
		// initView(R.layout.exception_no_internet,TAG_INTERNET_OFF,TITLE_NO_INTERNET,MESSAGE_NO_INTERNET);
		View mLayoutLoadingContent = initView(
				mContext.getResources().getIdentifier(
						"exception_loading_content", "layout",
						mContext.getPackageName()), TAG_LOADING_CONTENT,
				TITLE_LOADING, MESSAGE_LOADING);
		// View mLayoutLoadingContent =
		// initView(R.layout.exception_loading_content,TAG_LOADING_CONTENT,TITLE_LOADING,MESSAGE_LOADING);
		View mLayoutOther = initView(
				mContext.getResources().getIdentifier("exception_failure",
						"layout", mContext.getPackageName()),
				TAG_OTHER_EXCEPTION, TITLE_FAILURE, MESSAGE_FAILURE);
		// View mLayoutOther =
		// initView(R.layout.exception_failure,TAG_OTHER_EXCEPTION,TITLE_FAILURE,MESSAGE_FAILURE);

		mDefaultViews.add(0, mLayoutInternetOff);
		mDefaultViews.add(1, mLayoutLoadingContent);
		mDefaultViews.add(2, mLayoutOther);

		// Hide all layouts at first initialization
		mLayoutInternetOff.setVisibility(View.GONE);
		mLayoutLoadingContent.setVisibility(View.GONE);
		mLayoutOther.setVisibility(View.GONE);

		// init Layout params
		RelativeLayout.LayoutParams containerParams = new RelativeLayout.LayoutParams(
				LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
		containerParams.addRule(RelativeLayout.CENTER_HORIZONTAL);
		containerParams.addRule(RelativeLayout.CENTER_VERTICAL);

		// init new RelativeLayout Wrapper
		mContainer.setLayoutParams(containerParams);

		// Add default views
		mContainer.addView(mLayoutLoadingContent);
		mContainer.addView(mLayoutInternetOff);
		mContainer.addView(mLayoutOther);
	}

	private void initializeAbsListView() {

		setDefaultViews();

		AbsListView abslistview = (AbsListView) mTargetView;
		abslistview.setVisibility(View.GONE);
		ViewGroup parent = (ViewGroup) abslistview.getParent();
		if (mContainer != null) {
			parent.addView(mContainer);
			abslistview.setEmptyView(mContainer);
		} else
			throw new IllegalArgumentException("mContainer is null !");

	}

	public void showLoadingLayout() {
		show(TAG_LOADING_CONTENT);
	}

	public void showInternetOffLayout() {
		show(TAG_INTERNET_OFF);
	}

	public void showExceptionLayout() {
		show(TAG_OTHER_EXCEPTION);
	}

	public void showCustomView(String tag) {
		show(tag);
	}

	public void hideAll() {
		ArrayList<View> views = new ArrayList<View>(mDefaultViews);
		views.addAll(mCustomViews);
		for (View view : views) {
			view.setVisibility(View.GONE);
		}
		if (mSwitcher != null) {
			mSwitcher.setDisplayedChild(1);
		}
	}

	private void show(String tag) {
		ArrayList<View> views = new ArrayList<View>(mDefaultViews);
		views.addAll(mCustomViews);
		for (View view : views) {
			if (view.getTag() != null && view.getTag().toString().equals(tag)) {
				view.setVisibility(View.VISIBLE);
			} else {
				view.setVisibility(View.GONE);
			}
		}
		if (mSwitcher != null && mSwitcher.getDisplayedChild() != 0) {
			mSwitcher.setDisplayedChild(0);
		}
	}

	/**
	 * Return a view based on layout id
	 * 
	 * @param layout
	 *            Layout Id
	 * @param tag
	 *            Layout Tag
	 * @return View
	 */
	private View initView(int layout, String tag, String title,
			String description) {
		View view = mInflater.inflate(layout, null, false);

		view.setTag(tag);
		view.setVisibility(View.GONE);

		((TextView) view.findViewById(mContext.getResources().getIdentifier(
				"exception_title", "id", mContext.getPackageName())))
				.setText(title);
		// ((TextView) view.findViewById(R.id.exception_title)).setText(title);
		((TextView) view.findViewById(mContext.getResources().getIdentifier(
				"exception_message", "id", mContext.getPackageName())))
		// ((TextView) view.findViewById(R.id.exception_message))
				.setText(description);
		View buttonView = view.findViewById(mContext.getResources()
				.getIdentifier("exception_button", "id",
						mContext.getPackageName()));
		// View buttonView = view.findViewById(R.id.exception_button);
		if (buttonView != null)
			buttonView.setOnClickListener(this.mClickListener);

		return view;
	}

	/**
	 * 
	 * @see <a
	 *      href="http://developer.android.com/design/building-blocks/progress.html#activity">Android
	 *      Design Guidelines for Activity Circles</a>
	 * @deprecated This method has been deprecated because it does not adhere to
	 *             the Android design guidelines. Activity circle's should not
	 *             display any text.
	 * 
	 */
	public void setLoadingMessage(String message) {
		((TextView) mDefaultViews.get(1).findViewById(
				mContext.getResources().getIdentifier("exception_message",
						"id", mContext.getPackageName())))
		// ((TextView)
		// mDefaultViews.get(1).findViewById(R.id.exception_message))
				.setText(message);
	}

	public void setInternetOffMessage(String message) {
		((TextView) mDefaultViews.get(0).findViewById(
				mContext.getResources().getIdentifier("exception_message",
						"id", mContext.getPackageName())))
		// ((TextView)
		// mDefaultViews.get(0).findViewById(R.id.exception_message))
				.setText(message);
	}

	public void setOtherExceptionMessage(String message) {
		((TextView) mDefaultViews.get(2).findViewById(
				mContext.getResources().getIdentifier("exception_message",
						"id", mContext.getPackageName())))
		// ((TextView)
		// mDefaultViews.get(2).findViewById(R.id.exception_message))
				.setText(message);
	}

	public void setInternetOffTitle(String message) {
		((TextView) mDefaultViews.get(0).findViewById(
				mContext.getResources().getIdentifier("exception_title", "id",
						mContext.getPackageName())))
		// ((TextView) mDefaultViews.get(0).findViewById(R.id.exception_title))
				.setText(message);
	}

	public void setOtherExceptionTitle(String message) {
		((TextView) mDefaultViews.get(2).findViewById(
				mContext.getResources().getIdentifier("exception_title", "id",
						mContext.getPackageName())))
		// ((TextView) mDefaultViews.get(2).findViewById(R.id.exception_title))
				.setText(message);
	}

	public void setClickListener(View.OnClickListener clickListener) {

		this.mClickListener = clickListener;

		for (View view : mDefaultViews) {
			View buttonView = view.findViewById(mContext.getResources()
					.getIdentifier("exception_button", "id",
							mContext.getPackageName()));
			// View buttonView = view.findViewById(R.id.exception_button);
			if (buttonView != null)
				buttonView.setOnClickListener(this.mClickListener);
		}

	}

	public void addCustomView(View customView, String tag) {

		customView.setTag(tag);
		customView.setVisibility(View.GONE);
		mCustomViews.add(customView);
		mContainer.addView(customView);
	}

	private class Clonner {
		private View mView;

		public Clonner(View view) {
			this.setmView(view);
		}

		public View getmView() {
			return mView;
		}

		public void setmView(View mView) {
			this.mView = mView;
		}
	}
}