1/*
2 * Copyright (C) 2010 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 */
16package com.example.android.apis.view;
17
18import com.example.android.apis.R;
19
20import android.app.Activity;
21import android.content.Context;
22import android.content.Intent;
23import android.content.pm.ResolveInfo;
24import android.os.Bundle;
25import android.view.ActionMode;
26import android.view.Menu;
27import android.view.MenuItem;
28import android.view.View;
29import android.view.ViewGroup;
30import android.widget.BaseAdapter;
31import android.widget.Checkable;
32import android.widget.FrameLayout;
33import android.widget.GridView;
34import android.widget.ImageView;
35
36import java.util.List;
37
38/**
39 * This demo illustrates the use of CHOICE_MODE_MULTIPLE_MODAL, a.k.a. selection mode on GridView.
40 */
41public class Grid3 extends Activity {
42
43    GridView mGrid;
44
45    @Override
46    protected void onCreate(Bundle savedInstanceState) {
47        super.onCreate(savedInstanceState);
48
49        loadApps();
50
51        setContentView(R.layout.grid_1);
52        mGrid = (GridView) findViewById(R.id.myGrid);
53        mGrid.setAdapter(new AppsAdapter());
54        mGrid.setChoiceMode(GridView.CHOICE_MODE_MULTIPLE_MODAL);
55        mGrid.setMultiChoiceModeListener(new MultiChoiceModeListener());
56    }
57
58    private List<ResolveInfo> mApps;
59
60    private void loadApps() {
61        Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
62        mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
63
64        mApps = getPackageManager().queryIntentActivities(mainIntent, 0);
65    }
66
67    public class AppsAdapter extends BaseAdapter {
68        public AppsAdapter() {
69        }
70
71        public View getView(int position, View convertView, ViewGroup parent) {
72            CheckableLayout l;
73            ImageView i;
74
75            if (convertView == null) {
76                i = new ImageView(Grid3.this);
77                i.setScaleType(ImageView.ScaleType.FIT_CENTER);
78                i.setLayoutParams(new ViewGroup.LayoutParams(50, 50));
79                l = new CheckableLayout(Grid3.this);
80                l.setLayoutParams(new GridView.LayoutParams(GridView.LayoutParams.WRAP_CONTENT,
81                        GridView.LayoutParams.WRAP_CONTENT));
82                l.addView(i);
83            } else {
84                l = (CheckableLayout) convertView;
85                i = (ImageView) l.getChildAt(0);
86            }
87
88            ResolveInfo info = mApps.get(position);
89            i.setImageDrawable(info.activityInfo.loadIcon(getPackageManager()));
90
91            return l;
92        }
93
94
95        public final int getCount() {
96            return mApps.size();
97        }
98
99        public final Object getItem(int position) {
100            return mApps.get(position);
101        }
102
103        public final long getItemId(int position) {
104            return position;
105        }
106    }
107
108    public class CheckableLayout extends FrameLayout implements Checkable {
109        private boolean mChecked;
110
111        public CheckableLayout(Context context) {
112            super(context);
113        }
114
115        public void setChecked(boolean checked) {
116            mChecked = checked;
117            setBackgroundDrawable(checked ?
118                    getResources().getDrawable(R.drawable.blue)
119                    : null);
120        }
121
122        public boolean isChecked() {
123            return mChecked;
124        }
125
126        public void toggle() {
127            setChecked(!mChecked);
128        }
129
130    }
131
132    public class MultiChoiceModeListener implements GridView.MultiChoiceModeListener {
133        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
134            mode.setTitle("Select Items");
135            mode.setSubtitle("One item selected");
136            return true;
137        }
138
139        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
140            return true;
141        }
142
143        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
144            return true;
145        }
146
147        public void onDestroyActionMode(ActionMode mode) {
148        }
149
150        public void onItemCheckedStateChanged(ActionMode mode, int position, long id,
151                boolean checked) {
152            int selectCount = mGrid.getCheckedItemCount();
153            switch (selectCount) {
154            case 1:
155                mode.setSubtitle("One item selected");
156                break;
157            default:
158                mode.setSubtitle("" + selectCount + " items selected");
159                break;
160            }
161        }
162
163    }
164}
165