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Android example source code file (FeatureInfo.java)

This example Android source code file (FeatureInfo.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

android, creator, featureinfo, flag_required, gl_es_version_undefined, os, parcelable, string

The FeatureInfo.java Android example source code

/*
 * Copyright (C) 2009 The Android Open Source Project
 *
 * 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 android.content.pm;

import android.os.Parcel;
import android.os.Parcelable;
import android.os.Parcelable.Creator;

/**
 * A single feature that can be requested by an application. This corresponds
 * to information collected from the
 * AndroidManifest.xml's <uses-feature> tag.
 */
public class FeatureInfo implements Parcelable {
    /**
     * The name of this feature, for example "android.hardware.camera".  If
     * this is null, then this is an OpenGL ES version feature as described
     * in {@link #reqGlEsVersion}.
     */
    public String name;
    
    /**
     * Default value for {@link #reqGlEsVersion};
     */
    public static final int GL_ES_VERSION_UNDEFINED = 0;
    
    /**
     * The GLES version used by an application. The upper order 16 bits represent the
     * major version and the lower order 16 bits the minor version.  Only valid
     * if {@link #name} is null.
     */
    public int reqGlEsVersion;

    /**
     * Set on {@link #flags} if this feature has been required by the application.
     */
    public static final int FLAG_REQUIRED = 0x0001;
    
    /**
     * Additional flags.  May be zero or more of {@link #FLAG_REQUIRED}.
     */
    public int flags;
    
    public FeatureInfo() {
    }

    public FeatureInfo(FeatureInfo orig) {
        name = orig.name;
        reqGlEsVersion = orig.reqGlEsVersion;
        flags = orig.flags;
    }

    public String toString() {
        if (name != null) {
            return "FeatureInfo{"
                    + Integer.toHexString(System.identityHashCode(this))
                    + " " + name + " fl=0x" + Integer.toHexString(flags) + "}";
        } else {
            return "FeatureInfo{"
                    + Integer.toHexString(System.identityHashCode(this))
                    + " glEsVers=" + getGlEsVersion()
                    + " fl=0x" + Integer.toHexString(flags) + "}";
        }
    }

    public int describeContents() {
        return 0;
    }

    public void writeToParcel(Parcel dest, int parcelableFlags) {
        dest.writeString(name);
        dest.writeInt(reqGlEsVersion);
        dest.writeInt(flags);
    }

    public static final Creator<FeatureInfo> CREATOR =
        new Creator<FeatureInfo>() {
        public FeatureInfo createFromParcel(Parcel source) {
            return new FeatureInfo(source);
        }
        public FeatureInfo[] newArray(int size) {
            return new FeatureInfo[size];
        }
    };

    private FeatureInfo(Parcel source) {
        name = source.readString();
        reqGlEsVersion = source.readInt();
        flags = source.readInt();
    }

    /**
     * This method extracts the major and minor version of reqGLEsVersion attribute
     * and returns it as a string. Say reqGlEsVersion value of 0x00010002 is returned
     * as 1.2
     * @return String representation of the reqGlEsVersion attribute
     */
    public String getGlEsVersion() {
        int major = ((reqGlEsVersion & 0xffff0000) >> 16);
        int minor = reqGlEsVersion & 0x0000ffff;
        return String.valueOf(major)+"."+String.valueOf(minor);
    }
}

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