blob: a2d8ec0916995adf0e9a1844689a54a78a0cd212 (
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
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
package de.danoeh.antennapod.view;
import android.content.Context;
import android.database.DataSetObserver;
import android.graphics.drawable.Drawable;
import android.widget.AbsListView;
import android.widget.ListAdapter;
import androidx.annotation.AttrRes;
import androidx.core.content.ContextCompat;
import androidx.recyclerview.widget.RecyclerView;
import android.util.TypedValue;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import de.danoeh.antennapod.R;
public class EmptyViewHandler {
private boolean layoutAdded = false;
private View list;
private ListAdapter listAdapter;
private RecyclerView.Adapter recyclerAdapter;
private final Context context;
private final View emptyView;
private final TextView tvTitle;
private final TextView tvMessage;
private final ImageView ivIcon;
public EmptyViewHandler(Context context) {
emptyView = View.inflate(context, R.layout.empty_view_layout, null);
this.context = context;
tvTitle = emptyView.findViewById(R.id.emptyViewTitle);
tvMessage = emptyView.findViewById(R.id.emptyViewMessage);
ivIcon = emptyView.findViewById(R.id.emptyViewIcon);
}
public void setTitle(int title) {
tvTitle.setText(title);
}
public void setMessage(int message) {
tvMessage.setText(message);
}
public void setIcon(@AttrRes int iconAttr) {
TypedValue typedValue = new TypedValue();
context.getTheme().resolveAttribute(iconAttr, typedValue, true);
Drawable d = ContextCompat.getDrawable(context, typedValue.resourceId);
ivIcon.setImageDrawable(d);
ivIcon.setVisibility(View.VISIBLE);
}
public void hide() {
emptyView.setVisibility(View.GONE);
}
public void attachToListView(AbsListView listView) {
if (layoutAdded) {
throw new IllegalStateException("Can not attach EmptyView multiple times");
}
addToParentView(listView);
layoutAdded = true;
this.list = listView;
listView.setEmptyView(emptyView);
updateAdapter(listView.getAdapter());
}
public void attachToRecyclerView(RecyclerView recyclerView) {
if (layoutAdded) {
throw new IllegalStateException("Can not attach EmptyView multiple times");
}
addToParentView(recyclerView);
layoutAdded = true;
this.list = recyclerView;
updateAdapter(recyclerView.getAdapter());
}
private void addToParentView(View view) {
ViewGroup parent = ((ViewGroup) view.getParent());
parent.addView(emptyView);
if (parent instanceof RelativeLayout) {
RelativeLayout.LayoutParams layoutParams =
(RelativeLayout.LayoutParams) emptyView.getLayoutParams();
layoutParams.addRule(RelativeLayout.CENTER_IN_PARENT, RelativeLayout.TRUE);
emptyView.setLayoutParams(layoutParams);
}
}
public void updateAdapter(RecyclerView.Adapter adapter) {
if (this.recyclerAdapter != null) {
this.recyclerAdapter.unregisterAdapterDataObserver(adapterObserver);
}
this.recyclerAdapter = adapter;
if (adapter != null) {
adapter.registerAdapterDataObserver(adapterObserver);
}
updateVisibility();
}
private void updateAdapter(ListAdapter adapter) {
if (this.listAdapter != null) {
this.listAdapter.unregisterDataSetObserver(listAdapterObserver);
}
this.listAdapter = adapter;
if (adapter != null) {
adapter.registerDataSetObserver(listAdapterObserver);
}
updateVisibility();
}
private final SimpleAdapterDataObserver adapterObserver = new SimpleAdapterDataObserver() {
@Override
public void anythingChanged() {
updateVisibility();
}
};
private final DataSetObserver listAdapterObserver = new DataSetObserver() {
public void onChanged() {
updateVisibility();
}
};
public void updateVisibility() {
boolean empty;
if (recyclerAdapter != null) {
empty = recyclerAdapter.getItemCount() == 0;
} else if (listAdapter != null) {
empty = listAdapter.isEmpty();
} else {
empty = true;
}
list.setVisibility(empty ? View.GONE : View.VISIBLE);
emptyView.setVisibility(empty ? View.VISIBLE : View.GONE);
}
}
|
