1 /*
2  * Copyright (C) 2015 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.example.android.support.design.widget;
18 
19 import android.os.Bundle;
20 import android.view.View;
21 import android.widget.Button;
22 import android.widget.TextView;
23 
24 import androidx.annotation.NonNull;
25 import androidx.annotation.Nullable;
26 
27 import com.example.android.support.design.R;
28 import com.google.android.material.bottomsheet.BottomSheetBehavior;
29 
30 
31 /**
32  * This demonstrates basic usage of hideable {@link BottomSheetBehavior}.
33  */
34 public class BottomSheetHideable extends BottomSheetUsageBase {
35 
36     private TextView mTextSlideOffset;
37 
38     private Button mToggle;
39 
40     @Override
getLayoutId()41     protected int getLayoutId() {
42         return R.layout.design_bottom_sheet_hideable;
43     }
44 
45     @Override
onCreate(@ullable Bundle savedInstanceState)46     protected void onCreate(@Nullable Bundle savedInstanceState) {
47         super.onCreate(savedInstanceState);
48         mTextSlideOffset = findViewById(R.id.slide_offset);
49         mToggle = findViewById(R.id.toggle);
50         mToggle.setOnClickListener(mOnClickListener);
51         mBehavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
52             @Override
53             public void onStateChanged(@NonNull View bottomSheet,
54                     @BottomSheetBehavior.State int newState) {
55                 switch (newState) {
56                     case BottomSheetBehavior.STATE_HIDDEN:
57                         mToggle.setText(R.string.bottomsheet_show);
58                         mToggle.setEnabled(true);
59                         break;
60                     case BottomSheetBehavior.STATE_EXPANDED:
61                     case BottomSheetBehavior.STATE_COLLAPSED:
62                         mToggle.setText(R.string.bottomsheet_hide);
63                         mToggle.setEnabled(true);
64                         break;
65                 }
66             }
67 
68             @Override
69             public void onSlide(@NonNull View bottomSheet, float slideOffset) {
70                 mTextSlideOffset.setText(String.valueOf(slideOffset));
71             }
72         });
73     }
74 
75     private View.OnClickListener mOnClickListener = new View.OnClickListener() {
76         @Override
77         public void onClick(View v) {
78             if (v.getId() == R.id.toggle && mBehavior != null) {
79                 mToggle.setEnabled(false);
80                 if (mBehavior.getState() == BottomSheetBehavior.STATE_HIDDEN) {
81                     mBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
82                 } else {
83                     mBehavior.setState(BottomSheetBehavior.STATE_HIDDEN);
84                 }
85             }
86         }
87     };
88 
89 }
90