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 */ 16 package com.example.android.apis.view; 17 18 import com.example.android.apis.R; 19 20 import android.app.Activity; 21 import android.content.Context; 22 import android.content.Intent; 23 import android.content.pm.ResolveInfo; 24 import android.os.Bundle; 25 import android.view.ActionMode; 26 import android.view.Menu; 27 import android.view.MenuItem; 28 import android.view.View; 29 import android.view.ViewGroup; 30 import android.widget.BaseAdapter; 31 import android.widget.Checkable; 32 import android.widget.FrameLayout; 33 import android.widget.GridView; 34 import android.widget.ImageView; 35 36 import java.util.List; 37 38 /** 39 * This demo illustrates the use of CHOICE_MODE_MULTIPLE_MODAL, a.k.a. selection mode on GridView. 40 */ 41 public class Grid3 extends Activity { 42 43 GridView mGrid; 44 45 @Override onCreate(Bundle savedInstanceState)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 loadApps()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 { AppsAdapter()68 public AppsAdapter() { 69 } 70 getView(int position, View convertView, ViewGroup parent)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 getCount()95 public final int getCount() { 96 return mApps.size(); 97 } 98 getItem(int position)99 public final Object getItem(int position) { 100 return mApps.get(position); 101 } 102 getItemId(int position)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 CheckableLayout(Context context)111 public CheckableLayout(Context context) { 112 super(context); 113 } 114 setChecked(boolean checked)115 public void setChecked(boolean checked) { 116 mChecked = checked; 117 setBackgroundDrawable(checked ? 118 getResources().getDrawable(R.drawable.blue) 119 : null); 120 } 121 isChecked()122 public boolean isChecked() { 123 return mChecked; 124 } 125 toggle()126 public void toggle() { 127 setChecked(!mChecked); 128 } 129 130 } 131 132 public class MultiChoiceModeListener implements GridView.MultiChoiceModeListener { onCreateActionMode(ActionMode mode, Menu menu)133 public boolean onCreateActionMode(ActionMode mode, Menu menu) { 134 mode.setTitle("Select Items"); 135 mode.setSubtitle("One item selected"); 136 return true; 137 } 138 onPrepareActionMode(ActionMode mode, Menu menu)139 public boolean onPrepareActionMode(ActionMode mode, Menu menu) { 140 return true; 141 } 142 onActionItemClicked(ActionMode mode, MenuItem item)143 public boolean onActionItemClicked(ActionMode mode, MenuItem item) { 144 return true; 145 } 146 onDestroyActionMode(ActionMode mode)147 public void onDestroyActionMode(ActionMode mode) { 148 } 149 onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked)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