ComponentInfo.java revision 8aa2e8939c61d788cbc192098465e79f584e173a 
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
17package android.content.pm;
18
19import android.graphics.drawable.Drawable;
20import android.os.Parcel;
21import 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 */
31public 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
66    public ComponentInfo() {
67    }
68
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
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    @Override public Drawable loadIcon(PackageManager pm) {
103        ApplicationInfo ai = applicationInfo;
104        Drawable dr;
105        if (icon != 0) {
106            dr = pm.getDrawable(packageName, icon, ai);
107            if (dr != null) {
108                return dr;
109            }
110        }
111        if (ai.icon != 0) {
112            dr = pm.getDrawable(packageName, ai.icon, ai);
113            if (dr != null) {
114                return dr;
115            }
116        }
117        return pm.getDefaultActivityIcon();
118    }
119
120    /**
121     * Return the icon resource identifier to use for this component.  If
122     * the component defines an icon, that is used; else, the application
123     * icon is used.
124     *
125     * @return The icon associated with this component.
126     */
127    public final int getIconResource() {
128        return icon != 0 ? icon : applicationInfo.icon;
129    }
130
131    protected void dumpFront(Printer pw, String prefix) {
132        super.dumpFront(pw, prefix);
133        pw.println(prefix + "enabled=" + enabled + " exported=" + exported
134                + " processName=" + processName);
135        if (descriptionRes != 0) {
136            pw.println(prefix + "description=" + descriptionRes);
137        }
138    }
139
140    protected void dumpBack(Printer pw, String prefix) {
141        if (applicationInfo != null) {
142            pw.println(prefix + "ApplicationInfo:");
143            applicationInfo.dump(pw, prefix + "  ");
144        } else {
145            pw.println(prefix + "ApplicationInfo: null");
146        }
147        super.dumpBack(pw, prefix);
148    }
149
150    public void writeToParcel(Parcel dest, int parcelableFlags) {
151        super.writeToParcel(dest, parcelableFlags);
152        applicationInfo.writeToParcel(dest, parcelableFlags);
153        dest.writeString(processName);
154        dest.writeInt(descriptionRes);
155        dest.writeInt(enabled ? 1 : 0);
156        dest.writeInt(exported ? 1 : 0);
157    }
158
159    protected ComponentInfo(Parcel source) {
160        super(source);
161        applicationInfo = ApplicationInfo.CREATOR.createFromParcel(source);
162        processName = source.readString();
163        descriptionRes = source.readInt();
164        enabled = (source.readInt() != 0);
165        exported = (source.readInt() != 0);
166    }
167}
168