Android example source code file (ActivityPickerActivity.java)

This example Android source code file (ActivityPickerActivity.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

activityadapter, android, arraylist, bitmapdrawable, content, drawable, intent, listactivity, loadingtask, object, override, packagemanager, resolveinfowrapper, textview, ui, usertask, util, view, viewgroup, widget

The ActivityPickerActivity.java Android example source code

/*
 * Copyright (C) 2008 Google Inc.
 *
 * 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.anycut;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import android.app.Activity;
import android.app.ListActivity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;

import com.google.android.photostream.UserTask;

/**
 * Presents a list of activities to choose from. This list only contains activities
 * that have ACTION_MAIN, since other types may require data as input.
 */
public class ActivityPickerActivity extends ListActivity {
    PackageManager mPackageManager;

    /**
     * This class is used to wrap ResolveInfo so that it can be filtered using
     * ArrayAdapter's built int filtering logic, which depends on toString().
     */
    private final class ResolveInfoWrapper {
        private ResolveInfo mInfo;

        public ResolveInfoWrapper(ResolveInfo info) {
            mInfo = info;
        }

        @Override
        public String toString() {
            return mInfo.loadLabel(mPackageManager).toString();
        }

        public ResolveInfo getInfo() {
            return mInfo;
        }
    }

    private class ActivityAdapter extends ArrayAdapter<ResolveInfoWrapper> {
        LayoutInflater mInflater;

        public ActivityAdapter(Activity activity, ArrayList<ResolveInfoWrapper> activities) {
            super(activity, 0, activities);
            mInflater = activity.getLayoutInflater();
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            final ResolveInfoWrapper info = getItem(position);

            View view = convertView;
            if (view == null) {
                // Inflate the view and cache the pointer to the text view
                view = mInflater.inflate(android.R.layout.simple_list_item_1, parent, false);
                view.setTag(view.findViewById(android.R.id.text1));
            }

            final TextView textView = (TextView) view.getTag();
            textView.setText(info.getInfo().loadLabel(mPackageManager));

            return view;
        }
    }

    private final class LoadingTask extends UserTask<Object, Object, ActivityAdapter> {
        @Override
        public void onPreExecute() {
            setProgressBarIndeterminateVisibility(true);
        }

        @Override
        public ActivityAdapter doInBackground(Object... params) {
            // Load the activities
            Intent queryIntent = new Intent(Intent.ACTION_MAIN);
            List<ResolveInfo> list = mPackageManager.queryIntentActivities(queryIntent, 0);

            // Sort the list
            Collections.sort(list, new ResolveInfo.DisplayNameComparator(mPackageManager));

            // Make the wrappers
            ArrayList<ResolveInfoWrapper> activities = new ArrayList(list.size());
            for(ResolveInfo item : list) {
                activities.add(new ResolveInfoWrapper(item));
            }
            return new ActivityAdapter(ActivityPickerActivity.this, activities);
        }

        @Override
        public void onPostExecute(ActivityAdapter result) {
            setProgressBarIndeterminateVisibility(false);
            setListAdapter(result);
        }
    }

    @Override
    protected void onCreate(Bundle savedState) {
        super.onCreate(savedState);

        requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
        setContentView(R.layout.list);

        getListView().setTextFilterEnabled(true);

        mPackageManager = getPackageManager();

        // Start loading the data
        new LoadingTask().execute((Object[]) null);
    }

    @Override
    protected void onListItemClick(ListView list, View view, int position, long id) {
        ResolveInfoWrapper wrapper = (ResolveInfoWrapper) getListAdapter().getItem(position);
        ResolveInfo info = wrapper.getInfo();

        // Build the intent for the chosen activity
        Intent intent = new Intent();
        intent.setComponent(new ComponentName(info.activityInfo.applicationInfo.packageName,
                info.activityInfo.name));
        Intent result = new Intent();
        result.putExtra(Intent.EXTRA_SHORTCUT_INTENT, intent);

        // Set the name of the activity
        result.putExtra(Intent.EXTRA_SHORTCUT_NAME, info.loadLabel(mPackageManager));

        // Build the icon info for the activity
        Drawable drawable = info.loadIcon(mPackageManager);
        if (drawable instanceof BitmapDrawable) {
            BitmapDrawable bd = (BitmapDrawable) drawable;
            result.putExtra(Intent.EXTRA_SHORTCUT_ICON, bd.getBitmap());
        }
//        ShortcutIconResource iconResource = new ShortcutIconResource();
//        iconResource.packageName = info.activityInfo.packageName;
//        iconResource.resourceName = getResources().getResourceEntryName(info.getIconResource());
//        result.putExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE, iconResource);

        // Set the result
        setResult(RESULT_OK, result);
        finish();
    }
}