安卓对象传递_二

1.intent没有直接传递对象的，两种方法传递。cat类的比较耗资源，dog推荐使用

public class Cat implements Serializable{
String name;
int age;
String type;

@Override
public String toString() {
return "Cat{" +
"name='" + name + '\'' +
", age=" + age +
", type='" + type + '\'' +
'}';
}
}
public class Dog implements Parcelable {

String name;
int age;
String type;

public int describeContents() {
return 0;
}

@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(name);
dest.writeInt(age);
dest.writeString(type);
}
public static final Parcelable.Creator<Dog> CREATOR
= new Parcelable.Creator<Dog>() {
public Dog createFromParcel(Parcel in) {
Dog dog = new Dog();
dog.name = in.readString();
dog.age = in.readInt();
dog.type = in.readString();
return dog;
}

public Dog[] newArray(int size) {
return new Dog[size];
}
};

@Override
public String toString() {
return "Dog{" +
"name='" + name + '\'' +
", age=" + age +
", type='" + type + '\'' +
'}';
}
}
2.传递发生方法

public void send_cat(View view){
Cat cat = new Cat();
cat.name = "pipi";
cat.age = 18;
cat.type = "mmm";

Intent cat_mass = new Intent(this,Activity_m.class);
cat_mass.putExtra("cat",cat);
startActivity(cat_mass);
}

public void send_dog(View view){
Dog dog = new Dog();
dog.name = "qqq";
dog.age = 123;
dog.type = "dog";

Intent dog_mass = new Intent(this,Activity_m.class);

dog_mass.putExtra("dog",dog);
startActivity(dog_mass);
}
3.事件布局

<Button
android:id = "@+id/send_cat"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:onClick="send_cat"
android:text = "cat"
android:textColor="#00ff00"
/>
<Button
android:id = "@+id/send_dog"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerInParent="true"
android:onClick="send_dog"
android:text = "dog"
android:textColor="#00ff00"
/>
3.接受事件方法

public class Activity_m extends AppCompatActivity {

private EditText message;

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_activity_m);
message = (EditText) findViewById(R.id.text_message);

Intent intent = getIntent();
//Cat cat = (Cat) intent.getSerializableExtra("cat");
Dog dog = intent.getParcelableExtra("dog");

//message.setText(cat.toString());
message.setText(dog.toString());
}
}