java - 从对象启动 Activity

Question

开始 Activity 的通常方式是

Intent intent = new Intent(this, SecondActivity.class);
startActivity(intent);

有没有办法从一个对象启动一个 Activity？...比如

SecondActivity var = new SecondActivity();
var.start();

类似的东西..？!

Answer 1

只需将 Context 传递给您的 CustomObject 并使用它启动 Activity:

public class CustomObject {

    Context c;
    // and some other fields here...

    public CustomObject(Context c) {
        this.c = c;
    }

    public void startActivity() {

        Intent intent = new Intent(c, SecondActivity.class);
        c.startActivity(intent);
    }

    // and some other methods here...
}

在创建对象的 Activity 中:

CustomObject obj = new CustomObject(this);
obj.startActivity();