421 lines
15 KiB
Java
421 lines
15 KiB
Java
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/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.app;
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import android.content.Context;
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import android.content.Intent;
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import android.content.pm.ComponentInfo;
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import android.content.pm.PackageManager;
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import android.content.pm.ResolveInfo;
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import android.content.res.Resources;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.graphics.Paint;
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import android.graphics.PaintFlagsDrawFilter;
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import android.graphics.PixelFormat;
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import android.graphics.Rect;
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import android.graphics.drawable.BitmapDrawable;
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import android.graphics.drawable.Drawable;
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import android.graphics.drawable.PaintDrawable;
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import android.os.Bundle;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import android.view.Window;
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import android.widget.BaseAdapter;
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import android.widget.Filter;
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import android.widget.Filterable;
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import android.widget.ListView;
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import android.widget.TextView;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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/**
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* Displays a list of all activities which can be performed
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* for a given intent. Launches when clicked.
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*
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*/
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public abstract class LauncherActivity extends ListActivity {
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Intent mIntent;
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PackageManager mPackageManager;
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IconResizer mIconResizer;
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/**
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* An item in the list
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*/
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public static class ListItem {
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public ResolveInfo resolveInfo;
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public CharSequence label;
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public Drawable icon;
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public String packageName;
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public String className;
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public Bundle extras;
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ListItem(PackageManager pm, ResolveInfo resolveInfo, IconResizer resizer) {
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this.resolveInfo = resolveInfo;
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label = resolveInfo.loadLabel(pm);
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ComponentInfo ci = resolveInfo.activityInfo;
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if (ci == null) ci = resolveInfo.serviceInfo;
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if (label == null && ci != null) {
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label = resolveInfo.activityInfo.name;
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}
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if (resizer != null) {
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icon = resizer.createIconThumbnail(resolveInfo.loadIcon(pm));
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}
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packageName = ci.applicationInfo.packageName;
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className = ci.name;
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}
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public ListItem() {
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}
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}
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/**
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* Adapter which shows the set of activities that can be performed for a given intent.
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*/
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private class ActivityAdapter extends BaseAdapter implements Filterable {
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private final Object lock = new Object();
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private ArrayList<ListItem> mOriginalValues;
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protected final IconResizer mIconResizer;
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protected final LayoutInflater mInflater;
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protected List<ListItem> mActivitiesList;
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private Filter mFilter;
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public ActivityAdapter(IconResizer resizer) {
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mIconResizer = resizer;
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mInflater = (LayoutInflater) LauncherActivity.this.getSystemService(
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Context.LAYOUT_INFLATER_SERVICE);
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mActivitiesList = makeListItems();
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}
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public Intent intentForPosition(int position) {
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if (mActivitiesList == null) {
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return null;
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}
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Intent intent = new Intent(mIntent);
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ListItem item = mActivitiesList.get(position);
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intent.setClassName(item.packageName, item.className);
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if (item.extras != null) {
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intent.putExtras(item.extras);
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}
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return intent;
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}
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public ListItem itemForPosition(int position) {
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if (mActivitiesList == null) {
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return null;
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}
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return mActivitiesList.get(position);
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}
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public int getCount() {
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return mActivitiesList != null ? mActivitiesList.size() : 0;
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}
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public Object getItem(int position) {
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return position;
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}
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public long getItemId(int position) {
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return position;
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}
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public View getView(int position, View convertView, ViewGroup parent) {
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View view;
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if (convertView == null) {
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view = mInflater.inflate(
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com.android.internal.R.layout.activity_list_item_2, parent, false);
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} else {
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view = convertView;
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}
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bindView(view, mActivitiesList.get(position));
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return view;
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}
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private void bindView(View view, ListItem item) {
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TextView text = (TextView) view;
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text.setText(item.label);
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if (item.icon == null) {
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item.icon = mIconResizer.createIconThumbnail(
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item.resolveInfo.loadIcon(getPackageManager()));
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}
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text.setCompoundDrawablesWithIntrinsicBounds(item.icon, null, null, null);
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}
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public Filter getFilter() {
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if (mFilter == null) {
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mFilter = new ArrayFilter();
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}
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return mFilter;
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}
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/**
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* An array filters constrains the content of the array adapter with a prefix. Each
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* item that does not start with the supplied prefix is removed from the list.
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*/
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private class ArrayFilter extends Filter {
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@Override
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protected FilterResults performFiltering(CharSequence prefix) {
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FilterResults results = new FilterResults();
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if (mOriginalValues == null) {
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synchronized (lock) {
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mOriginalValues = new ArrayList<ListItem>(mActivitiesList);
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}
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}
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if (prefix == null || prefix.length() == 0) {
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synchronized (lock) {
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ArrayList<ListItem> list = new ArrayList<ListItem>(mOriginalValues);
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results.values = list;
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results.count = list.size();
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}
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} else {
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final String prefixString = prefix.toString().toLowerCase();
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ArrayList<ListItem> values = mOriginalValues;
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int count = values.size();
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ArrayList<ListItem> newValues = new ArrayList<ListItem>(count);
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for (int i = 0; i < count; i++) {
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ListItem item = values.get(i);
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String[] words = item.label.toString().toLowerCase().split(" ");
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int wordCount = words.length;
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for (int k = 0; k < wordCount; k++) {
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final String word = words[k];
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if (word.startsWith(prefixString)) {
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newValues.add(item);
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break;
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}
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}
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}
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results.values = newValues;
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results.count = newValues.size();
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}
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return results;
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}
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@Override
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protected void publishResults(CharSequence constraint, FilterResults results) {
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//noinspection unchecked
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mActivitiesList = (List<ListItem>) results.values;
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if (results.count > 0) {
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notifyDataSetChanged();
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} else {
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notifyDataSetInvalidated();
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}
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}
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}
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}
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/**
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* Utility class to resize icons to match default icon size.
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*/
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public class IconResizer {
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// Code is borrowed from com.android.launcher.Utilities.
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private int mIconWidth = -1;
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private int mIconHeight = -1;
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private final Rect mOldBounds = new Rect();
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private Canvas mCanvas = new Canvas();
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public IconResizer() {
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mCanvas.setDrawFilter(new PaintFlagsDrawFilter(Paint.DITHER_FLAG,
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Paint.FILTER_BITMAP_FLAG));
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final Resources resources = LauncherActivity.this.getResources();
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mIconWidth = mIconHeight = (int) resources.getDimension(
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android.R.dimen.app_icon_size);
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}
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/**
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* Returns a Drawable representing the thumbnail of the specified Drawable.
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* The size of the thumbnail is defined by the dimension
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* android.R.dimen.launcher_application_icon_size.
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*
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* This method is not thread-safe and should be invoked on the UI thread only.
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*
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* @param icon The icon to get a thumbnail of.
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*
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* @return A thumbnail for the specified icon or the icon itself if the
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* thumbnail could not be created.
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*/
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public Drawable createIconThumbnail(Drawable icon) {
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int width = mIconWidth;
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int height = mIconHeight;
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final int iconWidth = icon.getIntrinsicWidth();
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final int iconHeight = icon.getIntrinsicHeight();
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if (icon instanceof PaintDrawable) {
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PaintDrawable painter = (PaintDrawable) icon;
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painter.setIntrinsicWidth(width);
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painter.setIntrinsicHeight(height);
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}
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if (width > 0 && height > 0) {
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if (width < iconWidth || height < iconHeight) {
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final float ratio = (float) iconWidth / iconHeight;
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if (iconWidth > iconHeight) {
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height = (int) (width / ratio);
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} else if (iconHeight > iconWidth) {
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width = (int) (height * ratio);
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}
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final Bitmap.Config c = icon.getOpacity() != PixelFormat.OPAQUE ?
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Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565;
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final Bitmap thumb = Bitmap.createBitmap(mIconWidth, mIconHeight, c);
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final Canvas canvas = mCanvas;
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canvas.setBitmap(thumb);
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// Copy the old bounds to restore them later
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// If we were to do oldBounds = icon.getBounds(),
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// the call to setBounds() that follows would
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// change the same instance and we would lose the
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// old bounds
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mOldBounds.set(icon.getBounds());
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final int x = (mIconWidth - width) / 2;
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final int y = (mIconHeight - height) / 2;
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icon.setBounds(x, y, x + width, y + height);
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icon.draw(canvas);
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icon.setBounds(mOldBounds);
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icon = new BitmapDrawable(getResources(), thumb);
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} else if (iconWidth < width && iconHeight < height) {
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final Bitmap.Config c = Bitmap.Config.ARGB_8888;
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final Bitmap thumb = Bitmap.createBitmap(mIconWidth, mIconHeight, c);
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final Canvas canvas = mCanvas;
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canvas.setBitmap(thumb);
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mOldBounds.set(icon.getBounds());
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final int x = (width - iconWidth) / 2;
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final int y = (height - iconHeight) / 2;
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icon.setBounds(x, y, x + iconWidth, y + iconHeight);
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icon.draw(canvas);
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icon.setBounds(mOldBounds);
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icon = new BitmapDrawable(getResources(), thumb);
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}
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}
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return icon;
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}
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}
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@Override
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protected void onCreate(Bundle icicle) {
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super.onCreate(icicle);
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mPackageManager = getPackageManager();
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requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
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setProgressBarIndeterminateVisibility(true);
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onSetContentView();
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mIconResizer = new IconResizer();
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mIntent = new Intent(getTargetIntent());
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mIntent.setComponent(null);
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mAdapter = new ActivityAdapter(mIconResizer);
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setListAdapter(mAdapter);
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getListView().setTextFilterEnabled(true);
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setProgressBarIndeterminateVisibility(false);
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}
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/**
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* Override to call setContentView() with your own content view to
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* customize the list layout.
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*/
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protected void onSetContentView() {
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setContentView(com.android.internal.R.layout.activity_list);
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}
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@Override
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protected void onListItemClick(ListView l, View v, int position, long id) {
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Intent intent = intentForPosition(position);
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startActivity(intent);
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}
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/**
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* Return the actual Intent for a specific position in our
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* {@link android.widget.ListView}.
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* @param position The item whose Intent to return
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*/
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protected Intent intentForPosition(int position) {
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ActivityAdapter adapter = (ActivityAdapter) mAdapter;
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return adapter.intentForPosition(position);
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}
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/**
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* Return the {@link ListItem} for a specific position in our
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* {@link android.widget.ListView}.
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* @param position The item to return
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*/
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protected ListItem itemForPosition(int position) {
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ActivityAdapter adapter = (ActivityAdapter) mAdapter;
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return adapter.itemForPosition(position);
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}
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/**
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* Get the base intent to use when running
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* {@link PackageManager#queryIntentActivities(Intent, int)}.
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*/
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protected Intent getTargetIntent() {
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return new Intent();
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}
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/**
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* Perform query on package manager for list items. The default
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* implementation queries for activities.
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*/
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protected List<ResolveInfo> onQueryPackageManager(Intent queryIntent) {
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||
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|
return mPackageManager.queryIntentActivities(queryIntent, /* no flags */ 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Perform the query to determine which results to show and return a list of them.
|
||
|
|
*/
|
||
|
|
public List<ListItem> makeListItems() {
|
||
|
|
// Load all matching activities and sort correctly
|
||
|
|
List<ResolveInfo> list = onQueryPackageManager(mIntent);
|
||
|
|
Collections.sort(list, new ResolveInfo.DisplayNameComparator(mPackageManager));
|
||
|
|
|
||
|
|
ArrayList<ListItem> result = new ArrayList<ListItem>(list.size());
|
||
|
|
int listSize = list.size();
|
||
|
|
for (int i = 0; i < listSize; i++) {
|
||
|
|
ResolveInfo resolveInfo = list.get(i);
|
||
|
|
result.add(new ListItem(mPackageManager, resolveInfo, null));
|
||
|
|
}
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
}
|