android.os.Parcel.readByteArray NullPointerException

报错信息：

E/AndroidRuntime( 1626): java.lang.NullPointerExceptionE/AndroidRuntime( 1626):     at android.os.Parcel.readByteArray(Parcel.java:1649)E/AndroidRuntime( 1626):     at xxxx.b.a(ContactInfo.java:47)E/AndroidRuntime( 1626):     a  xxxxxx.b.createFromParcel(ContactInfo.java:40)E/AndroidRuntime( 1626):     at android.os.Parcel.readParcelable(Parcel.java:2111)E/AndroidRuntime( 1626):     at android.os.Parcel.readValue(Parcel.java:2020)E/AndroidRuntime( 1626):     at android.os.Parcel.readListInternal(Parcel.java:2362)E/AndroidRuntime( 1626):     at android.os.Parcel.readList(Parcel.java:1585)E/AndroidRuntime( 1626):     at xxx.util.m.b(ParcelableUtils.java:54)E/AndroidRuntime( 1626):     atxxxxxx.xxx.onClick(MainActivity.java:646)E/AndroidRuntime( 1626):     at android.view.View.performClick(View.java:4444)E/AndroidRuntime( 1626):     at android.view.View$PerformClick.run(View.java:18445)E/AndroidRuntime( 1626):     at android.os.Handler.handleCallback(Handler.java:733)E/AndroidRuntime( 1626):     at android.os.Handler.dispatchMessage(Handler.java:95)E/AndroidRuntime( 1626):     at android.os.Looper.loop(Looper.java:136)E/AndroidRuntime( 1626):     at android.app.ActivityThread.main(ActivityThread.java:5135)E/AndroidRuntime( 1626):     at java.lang.reflect.Method.invokeNative(Native Method)E/AndroidRuntime( 1626):     at java.lang.reflect.Method.invoke(Method.java:515)E/AndroidRuntime( 1626):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)E/AndroidRuntime( 1626):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:611)E/AndroidRuntime( 1626):     at dalvik.system.NativeStart.main(Native Method)W/ActivityManager(  789):   Force finishing activity xxxxx/.MainActivity

问题说明

当我在通过Parcel传递byte[]时出现了这个错误

public class ContactInfo implements Parcelable {    private String mName;//联系人名称    private String mNumber;// 联系人号码//    private static byte[] bmBytes;//联系人头像    private Bitmap bitmap;//头像bitmap    @Override    public int describeContents() {        return 0;    }    @Override    public void writeToParcel(Parcel dest, int flags) {        dest.writeString(mName);        dest.writeString(mNumber);        byte[] bytes=getBytesFromBitmap(bitmap);        dest.writeByteArray(bytes);   }    // 用来创建自定义的Parcelable的对象    public static final Creator<ContactInfo> CREATOR = new Creator<ContactInfo>() {        public ContactInfo createFromParcel(Parcel parcel) {            ContactInfo info = new ContactInfo();            String name = parcel.readString();            info.setmName(name);            String number = parcel.readString();            info.setmNumber(number);            byte[] bytes;            parcel.readByteArray(bytes);            info.setBitmap(getBitmapFromBytes(bytes));            return info;        }        public ContactInfo[] newArray(int size) {            return new ContactInfo[size];        }    };    public static Bitmap getBitmapFromBytes(byte[] bytes) {        return BitmapFactory.decodeByteArray(bytes, 0, bytes.length);    }    private byte[] getBytesFromBitmap(Bitmap bitmap) {        ByteArrayOutputStream bytesOS = new ByteArrayOutputStream();        //this.bitmap.compress(Bitmap.CompressFormat.PNG, 0, bytesOS);        bitmap.compress(Bitmap.CompressFormat.PNG, 0, bytesOS);        return bytesOS.toByteArray();    }    public void setBitmap(Bitmap bitmap) {        this.bitmap = bitmap;    }    public Bitmap getBitmap() {        return bitmap;    }    public String getmName() {        return mName;    }    public void setmName(String mName) {        this.mName = mName;    }    public String getmNumber() {        return mNumber;    }    public void setmNumber(String mNumber) {        this.mNumber = mNumber;    }}

解决

需要修改为在写入时使用：

byte[] bytes=getBytesFromBitmap(bitmap);dest.writeInt(bytes.length);dest.writeByteArray(bytes);

在读取时使用:

byte[] bytes=new byte[parcel.readInt()];parcel.readByteArray(bytes);