310 lines
10 KiB
Java
310 lines
10 KiB
Java
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/*
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* Copyright (C) 2009 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 org.xmlpull.v1.XmlPullParser;
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import org.xmlpull.v1.XmlPullParserException;
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import android.content.ComponentName;
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import android.content.Context;
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import android.content.pm.ApplicationInfo;
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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.pm.ServiceInfo;
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import android.content.pm.PackageManager.NameNotFoundException;
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import android.content.res.Resources.NotFoundException;
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import android.content.res.Resources;
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import android.content.res.TypedArray;
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import android.content.res.XmlResourceParser;
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import android.graphics.drawable.Drawable;
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import android.os.Parcel;
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import android.os.Parcelable;
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import android.service.wallpaper.WallpaperService;
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import android.util.AttributeSet;
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import android.util.Printer;
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import android.util.Xml;
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import java.io.IOException;
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/**
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* This class is used to specify meta information of a wallpaper service.
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*/
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public final class WallpaperInfo implements Parcelable {
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static final String TAG = "WallpaperInfo";
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/**
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* The Service that implements this wallpaper component.
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*/
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final ResolveInfo mService;
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/**
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* The wallpaper setting activity's name, to
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* launch the setting activity of this wallpaper.
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*/
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final String mSettingsActivityName;
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/**
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* Resource identifier for this wallpaper's thumbnail image.
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*/
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final int mThumbnailResource;
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/**
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* Resource identifier for a string indicating the author of the wallpaper.
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*/
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final int mAuthorResource;
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/**
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* Resource identifier for a string containing a short description of the wallpaper.
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*/
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final int mDescriptionResource;
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/**
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* Constructor.
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*
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* @param context The Context in which we are parsing the wallpaper.
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* @param service The ResolveInfo returned from the package manager about
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* this wallpaper's component.
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*/
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public WallpaperInfo(Context context, ResolveInfo service)
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throws XmlPullParserException, IOException {
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mService = service;
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ServiceInfo si = service.serviceInfo;
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PackageManager pm = context.getPackageManager();
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String settingsActivityComponent = null;
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int thumbnailRes = -1;
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int authorRes = -1;
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int descriptionRes = -1;
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XmlResourceParser parser = null;
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try {
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parser = si.loadXmlMetaData(pm, WallpaperService.SERVICE_META_DATA);
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if (parser == null) {
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throw new XmlPullParserException("No "
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+ WallpaperService.SERVICE_META_DATA + " meta-data");
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}
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Resources res = pm.getResourcesForApplication(si.applicationInfo);
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AttributeSet attrs = Xml.asAttributeSet(parser);
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int type;
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while ((type=parser.next()) != XmlPullParser.END_DOCUMENT
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&& type != XmlPullParser.START_TAG) {
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}
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String nodeName = parser.getName();
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if (!"wallpaper".equals(nodeName)) {
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throw new XmlPullParserException(
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"Meta-data does not start with wallpaper tag");
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}
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TypedArray sa = res.obtainAttributes(attrs,
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com.android.internal.R.styleable.Wallpaper);
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settingsActivityComponent = sa.getString(
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com.android.internal.R.styleable.Wallpaper_settingsActivity);
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thumbnailRes = sa.getResourceId(
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com.android.internal.R.styleable.Wallpaper_thumbnail,
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-1);
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authorRes = sa.getResourceId(
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com.android.internal.R.styleable.Wallpaper_author,
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-1);
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descriptionRes = sa.getResourceId(
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com.android.internal.R.styleable.Wallpaper_description,
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-1);
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sa.recycle();
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} catch (NameNotFoundException e) {
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throw new XmlPullParserException(
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"Unable to create context for: " + si.packageName);
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} finally {
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if (parser != null) parser.close();
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}
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mSettingsActivityName = settingsActivityComponent;
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mThumbnailResource = thumbnailRes;
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mAuthorResource = authorRes;
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mDescriptionResource = descriptionRes;
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}
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WallpaperInfo(Parcel source) {
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mSettingsActivityName = source.readString();
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mThumbnailResource = source.readInt();
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mAuthorResource = source.readInt();
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mDescriptionResource = source.readInt();
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mService = ResolveInfo.CREATOR.createFromParcel(source);
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}
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/**
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* Return the .apk package that implements this wallpaper.
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*/
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public String getPackageName() {
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return mService.serviceInfo.packageName;
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}
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/**
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* Return the class name of the service component that implements
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* this wallpaper.
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*/
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public String getServiceName() {
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return mService.serviceInfo.name;
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}
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/**
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* Return the raw information about the Service implementing this
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* wallpaper. Do not modify the returned object.
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*/
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public ServiceInfo getServiceInfo() {
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return mService.serviceInfo;
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}
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/**
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* Return the component of the service that implements this wallpaper.
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*/
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public ComponentName getComponent() {
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return new ComponentName(mService.serviceInfo.packageName,
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mService.serviceInfo.name);
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}
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/**
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* Load the user-displayed label for this wallpaper.
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*
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* @param pm Supply a PackageManager used to load the wallpaper's
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* resources.
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*/
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public CharSequence loadLabel(PackageManager pm) {
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return mService.loadLabel(pm);
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}
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/**
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* Load the user-displayed icon for this wallpaper.
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*
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* @param pm Supply a PackageManager used to load the wallpaper's
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* resources.
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*/
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public Drawable loadIcon(PackageManager pm) {
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return mService.loadIcon(pm);
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}
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/**
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* Load the thumbnail image for this wallpaper.
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*
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* @param pm Supply a PackageManager used to load the wallpaper's
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* resources.
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*/
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public Drawable loadThumbnail(PackageManager pm) {
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if (mThumbnailResource < 0) return null;
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return pm.getDrawable(mService.serviceInfo.packageName,
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mThumbnailResource,
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mService.serviceInfo.applicationInfo);
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}
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/**
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* Return a string indicating the author(s) of this wallpaper.
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*/
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public CharSequence loadAuthor(PackageManager pm) throws NotFoundException {
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if (mAuthorResource <= 0) throw new NotFoundException();
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String packageName = mService.resolvePackageName;
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ApplicationInfo applicationInfo = null;
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if (packageName == null) {
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packageName = mService.serviceInfo.packageName;
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applicationInfo = mService.serviceInfo.applicationInfo;
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}
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return pm.getText(packageName, mAuthorResource, applicationInfo);
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}
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/**
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* Return a brief summary of this wallpaper's behavior.
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*/
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public CharSequence loadDescription(PackageManager pm) throws NotFoundException {
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String packageName = mService.resolvePackageName;
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ApplicationInfo applicationInfo = null;
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if (packageName == null) {
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packageName = mService.serviceInfo.packageName;
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applicationInfo = mService.serviceInfo.applicationInfo;
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}
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if (mService.serviceInfo.descriptionRes != 0) {
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return pm.getText(packageName, mService.serviceInfo.descriptionRes,
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applicationInfo);
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}
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if (mDescriptionResource <= 0) throw new NotFoundException();
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return pm.getText(packageName, mDescriptionResource,
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mService.serviceInfo.applicationInfo);
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}
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/**
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* Return the class name of an activity that provides a settings UI for
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* the wallpaper. You can launch this activity be starting it with
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* an {@link android.content.Intent} whose action is MAIN and with an
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* explicit {@link android.content.ComponentName}
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* composed of {@link #getPackageName} and the class name returned here.
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*
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* <p>A null will be returned if there is no settings activity associated
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* with the wallpaper.
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*/
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public String getSettingsActivity() {
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return mSettingsActivityName;
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}
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public void dump(Printer pw, String prefix) {
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pw.println(prefix + "Service:");
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mService.dump(pw, prefix + " ");
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pw.println(prefix + "mSettingsActivityName=" + mSettingsActivityName);
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}
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@Override
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public String toString() {
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return "WallpaperInfo{" + mService.serviceInfo.name
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+ ", settings: "
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+ mSettingsActivityName + "}";
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}
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/**
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* Used to package this object into a {@link Parcel}.
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*
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* @param dest The {@link Parcel} to be written.
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* @param flags The flags used for parceling.
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*/
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public void writeToParcel(Parcel dest, int flags) {
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dest.writeString(mSettingsActivityName);
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dest.writeInt(mThumbnailResource);
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dest.writeInt(mAuthorResource);
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dest.writeInt(mDescriptionResource);
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mService.writeToParcel(dest, flags);
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}
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/**
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* Used to make this class parcelable.
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*/
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public static final Parcelable.Creator<WallpaperInfo> CREATOR = new Parcelable.Creator<WallpaperInfo>() {
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public WallpaperInfo createFromParcel(Parcel source) {
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return new WallpaperInfo(source);
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}
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public WallpaperInfo[] newArray(int size) {
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return new WallpaperInfo[size];
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}
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};
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public int describeContents() {
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return 0;
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}
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}
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