blob: 5362693870f44358d3eeea7d92ecdca3f47de86d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
/*
* Copyright 2013 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.batchstepsensor;
import android.os.Bundle;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.view.Menu;
import com.example.android.common.activities.SampleActivityBase;
import com.example.android.common.logger.Log;
import com.example.android.batchstepsensor.cardstream.CardStream;
import com.example.android.batchstepsensor.cardstream.CardStreamFragment;
import com.example.android.batchstepsensor.cardstream.CardStreamState;
import com.example.android.batchstepsensor.cardstream.OnCardClickListener;
import com.example.android.batchstepsensor.cardstream.StreamRetentionFragment;
public class MainActivity extends SampleActivityBase implements CardStream {
public static final String TAG = "MainActivity";
public static final String FRAGTAG = "BatchStepSensorFragment";
private CardStreamFragment mCardStreamFragment;
private StreamRetentionFragment mRetentionFragment;
private static final String RETENTION_TAG = "retention";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
FragmentManager fm = getSupportFragmentManager();
BatchStepSensorFragment fragment =
(BatchStepSensorFragment) fm.findFragmentByTag(FRAGTAG);
if (fragment == null) {
FragmentTransaction transaction = fm.beginTransaction();
fragment = new BatchStepSensorFragment();
transaction.add(fragment, FRAGTAG);
transaction.commit();
}
// Use fragment as click listener for cards, but must implement correct interface
if (!(fragment instanceof OnCardClickListener)){
throw new ClassCastException("BatchStepSensorFragment must " +
"implement OnCardClickListener interface.");
}
OnCardClickListener clickListener = (OnCardClickListener) fm.findFragmentByTag(FRAGTAG);
mRetentionFragment = (StreamRetentionFragment) fm.findFragmentByTag(RETENTION_TAG);
if (mRetentionFragment == null) {
mRetentionFragment = new StreamRetentionFragment();
fm.beginTransaction().add(mRetentionFragment, RETENTION_TAG).commit();
} else {
// If the retention fragment already existed, we need to pull some state.
// pull state out
CardStreamState state = mRetentionFragment.getCardStream();
// dump it in CardStreamFragment.
mCardStreamFragment =
(CardStreamFragment) fm.findFragmentById(R.id.fragment_cardstream);
mCardStreamFragment.restoreState(state, clickListener);
}
}
public CardStreamFragment getCardStream() {
if (mCardStreamFragment == null) {
mCardStreamFragment = (CardStreamFragment)
getSupportFragmentManager().findFragmentById(R.id.fragment_cardstream);
}
return mCardStreamFragment;
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
CardStreamState state = getCardStream().dumpState();
mRetentionFragment.storeCardStream(state);
}
}
|
