例。
public class MyClass implements Serializable { private static final long serialVersionUID = 1L; public String title; public String startTime; public String endTime; public String day; public boolean classEnabled; public MyClass(String title, String startTime, boolean enable) { this.title = title; this.startTime = startTime; this.classEnabled = enable; } public boolean saveObject(MyClass obj) {final File suspend_f=new File(SerializationTest.cacheDir, "test"); FileOutputStream fos = null; ObjectOutputStream oos = null; boolean keep = true; try { fos = new FileOutputStream(suspend_f); oos = new ObjectOutputStream(fos); oos.writeObject(obj); } catch (Exception e) { keep = false; } finally { try { if (oos != null) oos.close(); if (fos != null) fos.close(); if (keep == false) suspend_f.delete(); } catch (Exception e) { } } return keep; } public MyClass getObject(Context c) { final File suspend_f=new File(SerializationTest.cacheDir, "test"); MyClass simpleClass= null; FileInputStream fis = null; ObjectInputStream is = null; try { fis = new FileInputStream(suspend_f); is = new ObjectInputStream(fis); simpleClass = (MyClass) is.readObject(); } catch(Exception e) { String val= e.getMessage(); } finally { try { if (fis != null) fis.close(); if (is != null) is.close(); } catch (Exception e) { } } return simpleClass; }并从活动中致电
if(android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)) cacheDir=new File(android.os.Environment.getExternalStorageDirectory(),"MyCustomObject");else cacheDir= getCacheDir();if(!cacheDir.exists()) cacheDir.mkdirs();MyClass m = new MyClass("umer", "asif", true);boolean result = m.saveObject(m);if(result) Toast.makeText(this, "Saved object", Toast.LENGTH_LONG).show();else Toast.makeText(this, "Error saving object", Toast.LENGTH_LONG).show();MyClass m = new MyClass();MyClass c = m.getObject(this);if(c!= null) Toast.makeText(this, "Retrieved object", Toast.LENGTH_LONG).show();else Toast.makeText(this, "Error retrieving object", Toast.LENGTH_LONG).show();不要忘记在清单文件中使用write_external_storage权限。
