Add GridView selection mode demo

Change-Id: I154424f29458870f66b3bb6b2025a4cd6fd16ee8

samples/ApiDemos/AndroidManifest.xml

@@ -1360,6 +1360,15 @@
             </intent-filter>
         </activity>
 
+        <activity android:name=".view.Grid3"
+                  android:label="Views/Grid/3. Selection Mode"
+                  android:theme="@android:style/Theme.WithActionBar">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.SAMPLE_CODE" />
+            </intent-filter>
+        </activity>
+
         <activity android:name=".view.ImageView1"
                 android:label="Views/ImageView">
             <intent-filter>

samples/ApiDemos/src/com/example/android/apis/view/Grid3.java

@@ -0,0 +1,164 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.example.android.apis.view;
+
+import com.example.android.apis.R;
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.ResolveInfo;
+import android.os.Bundle;
+import android.view.ActionMode;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.BaseAdapter;
+import android.widget.Checkable;
+import android.widget.FrameLayout;
+import android.widget.GridView;
+import android.widget.ImageView;
+
+import java.util.List;
+
+/**
+ * This demo illustrates the use of CHOICE_MODE_MULTIPLE_MODAL, a.k.a. selection mode on GridView.
+ */
+public class Grid3 extends Activity {
+
+    GridView mGrid;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        loadApps();
+
+        setContentView(R.layout.grid_1);
+        mGrid = (GridView) findViewById(R.id.myGrid);
+        mGrid.setAdapter(new AppsAdapter());
+        mGrid.setChoiceMode(GridView.CHOICE_MODE_MULTIPLE_MODAL);
+        mGrid.setMultiChoiceModeListener(new MultiChoiceModeListener());
+    }
+
+    private List<ResolveInfo> mApps;
+
+    private void loadApps() {
+        Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
+        mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
+
+        mApps = getPackageManager().queryIntentActivities(mainIntent, 0);
+    }
+
+    public class AppsAdapter extends BaseAdapter {
+        public AppsAdapter() {
+        }
+
+        public View getView(int position, View convertView, ViewGroup parent) {
+            CheckableLayout l;
+            ImageView i;
+
+            if (convertView == null) {
+                i = new ImageView(Grid3.this);
+                i.setScaleType(ImageView.ScaleType.FIT_CENTER);
+                i.setLayoutParams(new ViewGroup.LayoutParams(50, 50));
+                l = new CheckableLayout(Grid3.this);
+                l.setLayoutParams(new GridView.LayoutParams(GridView.LayoutParams.WRAP_CONTENT,
+                        GridView.LayoutParams.WRAP_CONTENT));
+                l.addView(i);
+            } else {
+                l = (CheckableLayout) convertView;
+                i = (ImageView) l.getChildAt(0);
+            }
+
+            ResolveInfo info = mApps.get(position);
+            i.setImageDrawable(info.activityInfo.loadIcon(getPackageManager()));
+
+            return l;
+        }
+
+
+        public final int getCount() {
+            return mApps.size();
+        }
+
+        public final Object getItem(int position) {
+            return mApps.get(position);
+        }
+
+        public final long getItemId(int position) {
+            return position;
+        }
+    }
+
+    public class CheckableLayout extends FrameLayout implements Checkable {
+        private boolean mChecked;
+
+        public CheckableLayout(Context context) {
+            super(context);
+        }
+
+        public void setChecked(boolean checked) {
+            mChecked = checked;
+            setBackgroundDrawable(checked ?
+                    getResources().getDrawable(R.drawable.blue)
+                    : null);
+        }
+
+        public boolean isChecked() {
+            return mChecked;
+        }
+
+        public void toggle() {
+            setChecked(!mChecked);
+        }
+
+    }
+
+    public class MultiChoiceModeListener implements GridView.MultiChoiceModeListener {
+        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
+            mode.setTitle("Select Items");
+            mode.setSubtitle("One item selected");
+            return true;
+        }
+
+        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
+            return true;
+        }
+
+        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
+            return true;
+        }
+
+        public void onDestroyActionMode(ActionMode mode) {
+        }
+
+        public void onItemCheckedStateChanged(ActionMode mode, int position, long id,
+                boolean checked) {
+            int selectCount = mGrid.getCheckedItemCount();
+            switch (selectCount) {
+            case 1:
+                mode.setSubtitle("One item selected");
+                break;
+            default:
+                mode.setSubtitle("" + selectCount + " items selected");
+                break;
+            }
+        }
+
+    }
+}

samples/ApiDemos/src/com/example/android/apis/view/List15.java

@@ -1,3 +1,18 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package com.example.android.apis.view;
 
 import com.example.android.apis.R;
@@ -12,6 +27,9 @@ import android.widget.ArrayAdapter;
 import android.widget.ListView;
 import android.widget.Toast;
 
+/**
+ * This demo illustrates the use of CHOICE_MODE_MULTIPLE_MODAL, a.k.a. selection mode on ListView.
+ */
 public class List15 extends ListActivity {
     @Override
     protected void onCreate(Bundle savedInstanceState) {