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/*
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* Copyright 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.android.batchstepsensor;
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import android.os.Bundle;
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import android.support.v4.app.FragmentManager;
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import android.support.v4.app.FragmentTransaction;
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import android.view.Menu;
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import com.example.android.common.activities.SampleActivityBase;
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import com.example.android.common.logger.Log;
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import com.example.android.batchstepsensor.cardstream.CardStream;
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import com.example.android.batchstepsensor.cardstream.CardStreamFragment;
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import com.example.android.batchstepsensor.cardstream.CardStreamState;
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import com.example.android.batchstepsensor.cardstream.OnCardClickListener;
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import com.example.android.batchstepsensor.cardstream.StreamRetentionFragment;
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public class MainActivity extends SampleActivityBase implements CardStream {
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public static final String TAG = "MainActivity";
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public static final String FRAGTAG = "BatchStepSensorFragment";
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private CardStreamFragment mCardStreamFragment;
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private StreamRetentionFragment mRetentionFragment;
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private static final String RETENTION_TAG = "retention";
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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FragmentManager fm = getSupportFragmentManager();
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BatchStepSensorFragment fragment =
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(BatchStepSensorFragment) fm.findFragmentByTag(FRAGTAG);
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if (fragment == null) {
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FragmentTransaction transaction = fm.beginTransaction();
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fragment = new BatchStepSensorFragment();
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transaction.add(fragment, FRAGTAG);
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transaction.commit();
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}
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// Use fragment as click listener for cards, but must implement correct interface
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if(!(fragment instanceof OnCardClickListener)){
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throw new ClassCastException("BatchStepSensorFragment must " +
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"implement OnCardClickListener interface.");
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}
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OnCardClickListener clickListener = (OnCardClickListener) fm.findFragmentByTag(FRAGTAG);
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mRetentionFragment = (StreamRetentionFragment) fm.findFragmentByTag(RETENTION_TAG);
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if (mRetentionFragment == null) {
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mRetentionFragment = new StreamRetentionFragment();
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fm.beginTransaction().add(mRetentionFragment, RETENTION_TAG).commit();
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} else {
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// If the retention fragment already existed, we need to pull some state.
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// pull state out
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CardStreamState state = mRetentionFragment.getCardStream();
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// dump it in CardStreamFragment.
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mCardStreamFragment =
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(CardStreamFragment) fm.findFragmentById(R.id.fragment_cardstream);
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mCardStreamFragment.restoreState(state, clickListener);
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}
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}
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public CardStreamFragment getCardStream() {
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if (mCardStreamFragment == null) {
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mCardStreamFragment = (CardStreamFragment)
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getSupportFragmentManager().findFragmentById(R.id.fragment_cardstream);
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}
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return mCardStreamFragment;
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}
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@Override
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protected void onSaveInstanceState(Bundle outState) {
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super.onSaveInstanceState(outState);
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CardStreamState state = getCardStream().dumpState();
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mRetentionFragment.storeCardStream(state);
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}
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}