对象被序列化后可被保存或传输，这个例子实现了位图的序列化和反序列化。
这次就对Android工程自带的”icon.png”进行下手。
程序运行后会在/data/data/breakan.serializable/目录下生成一个bitmap.bin文件，这个文件保存的就是MyBitmap的对象。
1 package breakan.serializable; 2 3 import java.io.ByteArrayOutputStream; 4 import java.io.FileInputStream; 5 import java.io.FileOutputStream; 6 import java.io.ObjectInputStream; 7 import java.io.ObjectOutputStream; 8 import java.io.Serializable; 9 10 import android.app.Activity; 11 import android.graphics.Bitmap; 12 import android.graphics.BitmapFactory; 13 import android.graphics.Bitmap.CompressFormat; 14 import android.graphics.drawable.BitmapDrawable; 15 import android.os.Bundle; 16 import android.widget.ImageView; 17 import android.widget.TextView; 18 19 public class SerializableActivity extends Activity { 20 private Bitmap bitmap = null; 21 private ObjectOutputStream oos = null; 22 private ObjectInputStream ois = null; 23 // myBitmap1是要被序列化的对象 24 private MyBitmap myBitmap1 = null; 25 // myBitmap2是反序列化后得到的对象 26 private MyBitmap myBitmap2 = null; 27 private TextView tv1 = null; 28 private ImageView img1 = null; 29 30 /** Called when the activity is first created. */ 31 @Override 32 public void onCreate(Bundle savedInstanceState) { 33 super.onCreate(savedInstanceState); 34 setContentView(R.layout.main); 35 bitmap = ((BitmapDrawable) getResources().getDrawable(R.drawable.icon)) 36 .getBitmap(); 37 myBitmap1 = new MyBitmap(BytesBitmap.getBytes(bitmap), "icon.png"); 38 tv1 = (TextView) findViewById(R.id.tv1); 39 img1 = (ImageView) findViewById(R.id.img1); 40 41 try { 42 // 序列化myBitmap对象 43 oos = new ObjectOutputStream(new FileOutputStream( 44 "/data/data/breakan.serializable/bitmap.bin")); 45 oos.writeObject(myBitmap1); 46 oos.flush(); 47 // 反序列化myBitmap对象 48 ois = new ObjectInputStream(new FileInputStream( 49 "/data/data/breakan.serializable/bitmap.bin")); 50 myBitmap2 = (MyBitmap) ois.readObject(); 51 } catch (Exception e) { 52 e.printStackTrace(); 53 } finally { 54 try { 55 if (oos != null) { 56 oos.close(); 57 } 58 if (ois != null) { 59 ois.close(); 60 } 61 } catch (Exception e) { 62 e.printStackTrace(); 63 } 64 } 65 66 tv1.setText(myBitmap2.getName()); 67 img1.setImageBitmap(BytesBitmap.getBitmap(myBitmap2.getBitmapBytes())); 68 } 69 70 } 71 72 /** 73 * 因为Bitmap没有实现序列化，所以不能直接在序列化类(MyBitmap)中使用 74 * BytesBitmap用于实现Bitmap和byte[]间的相互转换 75 * @author joran 76 * 77 */ 78 class BytesBitmap { 79 public static Bitmap getBitmap(byte[] data) { 80 return BitmapFactory.decodeByteArray(data, 0, data.length); 81 } 82 83 public static byte[] getBytes(Bitmap bitmap) { 84 ByteArrayOutputStream baops = new ByteArrayOutputStream(); 85 bitmap.compress(CompressFormat.PNG, 0, baops); 86 return baops.toByteArray(); 87 } 88 } 89 90 /** 91 * MyBitmap是要被序列化的类 92 * 其中包含了通过BytesBitmap类得到的Bitmap中数据的数组 93 * 和一个保存位图的名字的字符串，用于标识图片 94 * @author joran 95 * 96 */ 97 class MyBitmap implements Serializable { 98 /** 99 * serialVersionUID解释:100 * http://www.blogjava.net/invisibletank/archive/2007/11/15/160684.html101 */102 private static final long serialVersionUID = 1L;103 private byte[] bitmapBytes = null;104 private String name = null;105 106 public MyBitmap(byte[] bitmapBytes, String name) {107 // TODO Auto-generated constructor stub108 this.bitmapBytes = bitmapBytes;109 this.name = name;110 }111 112 public byte[] getBitmapBytes() {113 return this.bitmapBytes;114 }115 116 public String getName() {117 return this.name;118 }119 }
来源：https://www.cnblogs.com/andlife/archive/2011/06/23/2088236.html