Read a Serializable object from the Parcel . - Android android.os

Android examples for android.os:Parcel

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Description

Read a Serializable object from the Parcel .

Demo Code

/*//from ww  w. j a  va2s.com
 * Copyright (C) 2014 Neo Visionaries Inc.
 *
 * 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 com.java2s;
import java.io.Serializable;
import android.os.Parcel;

public class Main {
    /**
     * Read a {@code Serializable} object from the {@code Parcel}.
     *
     * <p>
     * First, this method reads a {@code boolean} value from the
     * {@code Parcel} using {@link #readBoolean(Parcel)} method.
     * When the read {@code boolean} value is {@code true}, this
     * method executes {@link Parcel#readSerializable()
     * in.readSerializable()} and returns the value. Otherwise,
     * when the read {@code boolean} value is {@code false},
     * this method returns
     * {@code null}.
     * </p>
     *
     * @param in
     *         {@code Parcel} to read from.
     *
     * @return
     *         {@code Serializable} object or {@code null}.
     */
    public static Serializable readSerializableWithPresenceFlag(Parcel in) {
        if (readBoolean(in)) {
            // Present.
            return in.readSerializable();
        } else {
            // Not present.
            return null;
        }
    }

    /**
     * Read a {@code boolean} value from the {@code Parcel}.
     *
     * <p>
     * This method reads one {@code byte} and returns {@code true}
     * if the read value is not 0.
     * </p>
     *
     * @param in
     *         {@code Parcel} to read from.
     *
     * @return
     *         A {@code boolean} value read from the {@code Parcel}.
     */
    public static boolean readBoolean(Parcel in) {
        return (in.readByte() != 0);
    }
}

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