android activity之间数据传递更新UI(一)

正统方法

1. 单行数据

 // 传值
        Intent intent = new Intent(this, KapHomePageActivity.class);
        intent.putExtra("homePageActivity_name","小明");
 // 取值
        Intent intent =  getIntent();
        String name = intent.getStringExtra("homePageActivity_name");

2. 多行数据

// 传值
        Intent intent = new Intent(this, KapHomePageActivity.class);
        Bundle bundle = new Bundle();
        bundle.putString("name","小明");
        bundle.putInt("age",21);
        intent.putExtra("homePageActivity_bundle",bundle);
// 取值
        Intent intent =  getIntent();
        Bundle bundle = intent.getBundleExtra("homePageActivity_bundle");
        String name =  bundle.getString("name");
        int age = bundle.getInt("age");

3. 对象(需要将对象进行序例化: Serializable)

// 序列化对象
public abstract class KapModelBase implements Serializable{ // 实现序列化接口，用于页面间传递对象
}
// 传值
        Intent intent = new Intent(this, KapHomePageActivity.class);
        intent.putExtra("homePageActivity_modelBill", new KapModelBill());
// 取值
        Intent intent =  getIntent();
        KapModelBill bill = (KapModelBill)intent.getSerializableExtra("homePageActivity_modelBill");

4. 数组 (数组元素要实现Parcelable接口)

// 传值
        Intent intent = new Intent(this, KapHomePageActivity.class);
        intent.putParcelableArrayListExtra("homePageActivity_modelArray", new ArrayList<KapModelBill>());

// 取值
        Intent intent =  getIntent();
        ArrayList<KapModelBill> modelList = intent.getParcelableArrayListExtra("homePageActivity_modelArray");