1 /*
2  * Copyright (C) 2008 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 
17 package android.content.pm;
18 
19 import android.graphics.drawable.Drawable;
20 import android.os.Parcel;
21 import android.util.Printer;
22 
23 /**
24  * Base class containing information common to all application components
25  * ({@link ActivityInfo}, {@link ServiceInfo}).  This class is not intended
26  * to be used by itself; it is simply here to share common definitions
27  * between all application components.  As such, it does not itself
28  * implement Parcelable, but does provide convenience methods to assist
29  * in the implementation of Parcelable in subclasses.
30  */
31 public class ComponentInfo extends PackageItemInfo {
32     /**
33      * Global information about the application/package this component is a
34      * part of.
35      */
36     public ApplicationInfo applicationInfo;
37 
38     /**
39      * The name of the process this component should run in.
40      * From the "android:process" attribute or, if not set, the same
41      * as <var>applicationInfo.processName</var>.
42      */
43     public String processName;
44 
45     /**
46      * A string resource identifier (in the package's resources) containing
47      * a user-readable description of the component.  From the "description"
48      * attribute or, if not set, 0.
49      */
50     public int descriptionRes;
51 
52     /**
53      * Indicates whether or not this component may be instantiated.  Note that this value can be
54      * overriden by the one in its parent {@link ApplicationInfo}.
55      */
56     public boolean enabled = true;
57 
58     /**
59      * Set to true if this component is available for use by other applications.
60      * Comes from {@link android.R.attr#exported android:exported} of the
61      * &lt;activity&gt;, &lt;receiver&gt;, &lt;service&gt;, or
62      * &lt;provider&gt; tag.
63      */
64     public boolean exported = false;
65 
ComponentInfo()66     public ComponentInfo() {
67     }
68 
ComponentInfo(ComponentInfo orig)69     public ComponentInfo(ComponentInfo orig) {
70         super(orig);
71         applicationInfo = orig.applicationInfo;
72         processName = orig.processName;
73         descriptionRes = orig.descriptionRes;
74         enabled = orig.enabled;
75         exported = orig.exported;
76     }
77 
loadLabel(PackageManager pm)78     @Override public CharSequence loadLabel(PackageManager pm) {
79         if (nonLocalizedLabel != null) {
80             return nonLocalizedLabel;
81         }
82         ApplicationInfo ai = applicationInfo;
83         CharSequence label;
84         if (labelRes != 0) {
85             label = pm.getText(packageName, labelRes, ai);
86             if (label != null) {
87                 return label;
88             }
89         }
90         if (ai.nonLocalizedLabel != null) {
91             return ai.nonLocalizedLabel;
92         }
93         if (ai.labelRes != 0) {
94             label = pm.getText(packageName, ai.labelRes, ai);
95             if (label != null) {
96                 return label;
97             }
98         }
99         return name;
100     }
101 
102     /**
103      * Return whether this component and its enclosing application are enabled.
104      */
isEnabled()105     public boolean isEnabled() {
106         return enabled && applicationInfo.enabled;
107     }
108 
109     /**
110      * Return the icon resource identifier to use for this component.  If
111      * the component defines an icon, that is used; else, the application
112      * icon is used.
113      *
114      * @return The icon associated with this component.
115      */
getIconResource()116     public final int getIconResource() {
117         return icon != 0 ? icon : applicationInfo.icon;
118     }
119 
120     /**
121      * Return the logo resource identifier to use for this component.  If
122      * the component defines a logo, that is used; else, the application
123      * logo is used.
124      *
125      * @return The logo associated with this component.
126      */
getLogoResource()127     public final int getLogoResource() {
128         return logo != 0 ? logo : applicationInfo.logo;
129     }
130 
131     /**
132      * Return the banner resource identifier to use for this component. If the
133      * component defines a banner, that is used; else, the application banner is
134      * used.
135      *
136      * @return The banner associated with this component.
137      */
getBannerResource()138     public final int getBannerResource() {
139         return banner != 0 ? banner : applicationInfo.banner;
140     }
141 
dumpFront(Printer pw, String prefix)142     protected void dumpFront(Printer pw, String prefix) {
143         super.dumpFront(pw, prefix);
144         pw.println(prefix + "enabled=" + enabled + " exported=" + exported
145                 + " processName=" + processName);
146         if (descriptionRes != 0) {
147             pw.println(prefix + "description=" + descriptionRes);
148         }
149     }
150 
dumpBack(Printer pw, String prefix)151     protected void dumpBack(Printer pw, String prefix) {
152         if (applicationInfo != null) {
153             pw.println(prefix + "ApplicationInfo:");
154             applicationInfo.dump(pw, prefix + "  ");
155         } else {
156             pw.println(prefix + "ApplicationInfo: null");
157         }
158         super.dumpBack(pw, prefix);
159     }
160 
writeToParcel(Parcel dest, int parcelableFlags)161     public void writeToParcel(Parcel dest, int parcelableFlags) {
162         super.writeToParcel(dest, parcelableFlags);
163         applicationInfo.writeToParcel(dest, parcelableFlags);
164         dest.writeString(processName);
165         dest.writeInt(descriptionRes);
166         dest.writeInt(enabled ? 1 : 0);
167         dest.writeInt(exported ? 1 : 0);
168     }
169 
ComponentInfo(Parcel source)170     protected ComponentInfo(Parcel source) {
171         super(source);
172         applicationInfo = ApplicationInfo.CREATOR.createFromParcel(source);
173         processName = source.readString();
174         descriptionRes = source.readInt();
175         enabled = (source.readInt() != 0);
176         exported = (source.readInt() != 0);
177     }
178 
179     /**
180      * @hide
181      */
182     @Override
loadDefaultIcon(PackageManager pm)183     public Drawable loadDefaultIcon(PackageManager pm) {
184         return applicationInfo.loadIcon(pm);
185     }
186 
187     /**
188      * @hide
189      */
loadDefaultBanner(PackageManager pm)190     @Override protected Drawable loadDefaultBanner(PackageManager pm) {
191         return applicationInfo.loadBanner(pm);
192     }
193 
194     /**
195      * @hide
196      */
197     @Override
loadDefaultLogo(PackageManager pm)198     protected Drawable loadDefaultLogo(PackageManager pm) {
199         return applicationInfo.loadLogo(pm);
200     }
201 
202     /**
203      * @hide
204      */
getApplicationInfo()205     @Override protected ApplicationInfo getApplicationInfo() {
206         return applicationInfo;
207     }
208 }
209