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/*
* Copyright 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.tabcompat.lib;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
/**
* Convenience helper to build a set of tabs for a {@link TabCompatActivity}. To use this class,
* extend {@link TabCompatActivity} and:
*
* Call {@link TabCompatActivity#getTabHelper()}, returning a {@link TabHelper}.
*
* Create a {@link CompatTabListener}.
*
* Call {@link TabHelper#newTab(String)} to create each tab.
*
* Call CompatTab.setText().setIcon().setTabListener() to set up your tabs.
*
* Call {@link TabHelper#addTab(CompatTab)} for each tab, and you're done.
*/
public abstract class TabHelper {
protected FragmentActivity mActivity;
protected TabHelper(FragmentActivity activity) {
mActivity = activity;
}
/**
* Factory method for creating TabHelper objects for a given activity. Depending on which device
* the app is running, either a basic helper or Honeycomb-specific helper will be returned.
* Don't call this yourself; the TabCompatActivity instantiates one. Instead call
* TabCompatActivity.getTabHelper().
*/
public static TabHelper createInstance(FragmentActivity activity) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
return new TabHelperHoneycomb(activity);
} else {
return new TabHelperEclair(activity);
}
}
/**
* Create a new tab.
*
* @param tag A unique tag to associate with the tab and associated fragment
* @return CompatTab for the appropriate android version
*/
public CompatTab newTab(String tag) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
return new CompatTabHoneycomb(mActivity, tag);
} else {
return new CompatTabEclair(mActivity, tag);
}
}
public abstract void addTab(CompatTab tab);
protected abstract void onSaveInstanceState(Bundle outState);
protected abstract void onRestoreInstanceState(Bundle savedInstanceState);
protected abstract void setUp();
}
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