1/*
2 * Copyright (C) 2016 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
17package com.example.android.support.design.widget;
18
19import android.content.res.ColorStateList;
20import android.os.Bundle;
21import android.support.annotation.NonNull;
22import android.support.design.widget.BottomNavigationView;
23import android.support.v7.app.AppCompatActivity;
24import android.view.MenuItem;
25import android.view.View;
26import android.widget.Button;
27import android.widget.TextView;
28
29import com.example.android.support.design.R;
30
31/**
32 * This demonstrates idiomatic usage of the bottom navigation widget.
33 */
34public class BottomNavigationViewUsage extends AppCompatActivity {
35    private ColorStateList mOriginalTint;
36
37    @Override
38    protected void onCreate(Bundle savedInstanceState) {
39        super.onCreate(savedInstanceState);
40        setContentView(R.layout.design_bottom_navigation_view);
41        Button buttonDisable = findViewById(R.id.button_disable);
42        final BottomNavigationView bottom =
43                findViewById(R.id.bottom_navigation);
44        mOriginalTint = bottom.getItemIconTintList();
45        buttonDisable.setOnClickListener(new View.OnClickListener() {
46            @Override
47            public void onClick(View view) {
48                bottom.getMenu().getItem(0).setEnabled(!bottom.getMenu().getItem(0).isEnabled());
49            }
50        });
51        Button buttonAdd = findViewById(R.id.button_add);
52        buttonAdd.setOnClickListener(new View.OnClickListener() {
53            @Override
54            public void onClick(View view) {
55                if (bottom.getMenu().size() < bottom.getMaxItemCount()) {
56                    MenuItem item = bottom.getMenu().add("Bananas");
57                    item.setIcon(android.R.drawable.ic_lock_power_off);
58                }
59            }
60        });
61        Button buttonRemove = findViewById(R.id.button_remove);
62        buttonRemove.setOnClickListener(new View.OnClickListener() {
63            @Override
64            public void onClick(View view) {
65                if (bottom.getMenu().size() > 0) {
66                    bottom.getMenu().removeItem(bottom.getMenu().getItem(0).getItemId());
67                }
68            }
69        });
70        Button buttonTint = findViewById(R.id.button_tint);
71        buttonTint.setOnClickListener(new View.OnClickListener() {
72            @Override
73            public void onClick(View view) {
74                if (bottom.getItemIconTintList() == null) {
75                    bottom.setItemIconTintList(mOriginalTint);
76                } else {
77                    bottom.setItemIconTintList(null);
78                }
79            }
80        });
81        Button buttonNext = findViewById(R.id.button_select_next);
82        buttonNext.setOnClickListener(new View.OnClickListener() {
83            @Override
84            public void onClick(View view) {
85                final int menuSize = bottom.getMenu().size();
86                if (menuSize < 1) {
87                    return;
88                }
89                int currentlySelected = 0;
90                for (int i = 0; i < menuSize; i++) {
91                    if (bottom.getMenu().getItem(i).isChecked()) {
92                        currentlySelected = i;
93                        break;
94                    }
95                }
96                int next = (currentlySelected + 1) % menuSize;
97                bottom.setSelectedItemId(bottom.getMenu().getItem(next).getItemId());
98            }
99        });
100        final TextView selectedItem = findViewById(R.id.selected_item);
101        bottom.setOnNavigationItemSelectedListener(
102                new BottomNavigationView.OnNavigationItemSelectedListener() {
103                    @Override
104                    public boolean onNavigationItemSelected(@NonNull MenuItem item) {
105                        switch (item.getItemId()) {
106                            case R.id.action_search:
107                                selectedItem.setText("Entering searching mode");
108                                break;
109                            case R.id.action_settings:
110                                selectedItem.setText("Entering settings!?!");
111                                break;
112                            case R.id.action_music:
113                                selectedItem.setText("Play some music");
114                                break;
115                            default:
116                                selectedItem.setText("Selected " + item.getTitle());
117                        }
118                        return true;
119                    }
120                });
121        bottom.setOnNavigationItemReselectedListener(
122                new BottomNavigationView.OnNavigationItemReselectedListener() {
123                    @Override
124                    public void onNavigationItemReselected(@NonNull MenuItem item) {
125                        selectedItem.setText("Reselected " + item.getTitle());
126                    }
127                });
128    }
129}
130