Android通过Intent传输包含自定义类的ArrayList
package javastudy; import java.io.Serializable; public class Person implements Serializable { private static final long serialVersionUID = -6470574927973900913L; private String firstName; private String secondName; // example for transinet private transient String noSerializableString; public Person(String firstName, String secondName, String noSerializableString) { super(); this.firstName = firstName; this.secondName = secondName; this.noSerializableString = noSerializableString; } public String getFirstName() { return firstName; } public void setFirstName(String firstName) { this.firstName = firstName; } public String getSecondName() { return secondName; } public void setSecondName(String secondName) { this.secondName = secondName; } public String getNoSerializableString() { if (noSerializableString != null) { return noSerializableString; } else { return ""; } } public void setNoSerializableString(String noSerializableString) { this.noSerializableString = noSerializableString; } public String toString() { return "Person [ first name :" + getFirstName() + ", second name :" + getSecondName() + ", no serializable :" + getNoSerializableString() + "]"; } }
再写一个类,用于实现对象的序列化和反序列化
package javastudy; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; public class TestSerializable { public static void main(String[] args) { Person person = new Person("Wang", "Zhengyi", "Genius"); String fileName = "/tmp/person.out"; // save object to file FileOutputStream fos = null; ObjectOutputStream out = null; try { fos = new FileOutputStream(fileName); out = new ObjectOutputStream(fos); out.writeObject(person); out.flush(); } catch (Exception e) { e.printStackTrace(); } finally { if (fos != null) { try { fos.close(); } catch (IOException e) { e.printStackTrace(); } } if (out != null) { try { out.close(); } catch (IOException e) { e.printStackTrace(); } } } // read object from file FileInputStream fin = null; ObjectInputStream in = null; try { fin = new FileInputStream(fileName); in = new ObjectInputStream(fin); Person p = (Person) in.readObject(); System.out.println(p); } catch (Exception e) { e.printStackTrace(); } finally { if (fin != null) { try { fin.close(); } catch (IOException e) { e.printStackTrace(); } } if (in != null) { try { in.close(); } catch (IOException e) { e.printStackTrace(); } } } } }
// Intent Creation and Initialization Intent passIntent = new Intent(); passIntent.setClass(MainActivity.this, SecondaryActivity.class); // Create custom class Object Person p1 = new Person("Wang", "Zhengyi", "first"); Person p2 = new Person("Chen", "Shan", "second"); // Create Array List of custom Class and add the Created object ArrayList<Person> aListClass = new ArrayList<Person>(); aListClass.add(p1); aListClass.add(p2); // Create a Bundle and Put Bundle in to it Bundle bundleObject = new Bundle(); bundleObject.putSerializable("key", aListClass); // Put Bundle in to Intent and call start Activity passIntent.putExtras(bundleObject); startActivity(passIntent);
第二个接收ArrayList的Activity关键代码如下:
try{ // Get the Bundle Object Bundle bundleObject = getIntent().getExtras(); // Get ArrayList Bundle ArrayList<Person> classObject = (ArrayList<Person>) bundleObject.getSerializable("key"); Retrieve Objects from Bundle for(int index = 0; index < classObject.size(); index++){ Person person = classObject.get(index); Toast.makeText(getApplicationContext(), person, Toast.LENGTH_SHORT).show(); } } catch(Exception e){ e.printStackTrace(); }