android - 如何从应用程序模块调用库模块的 Activity

Question

我想从应用程序模块调用库模块的Activity。但是应用程序崩溃了。以下是我的代码

主 Activity .java

public class MainActivity extends AppCompatActivity
{
    protected void onCreate(Bundle savedInstanceState)
    {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_main);
       Intent intent = new Intent("com.example.main.mainactivity");
       startActivity(intent);
    }
}

请帮助我。

Answer 1

The Intent constructor takes two parameters:

Intent intent = new Intent(Contecxt,Class);

1. A Context as its first parameter (this is used because the Activity class is a subclass of Context)

2. The Class of the app component to which the system should deliver the Intent (in this case, the activity that should be started).

read from docs

用这个

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

而不是这个

Intent intent = new Intent("com.example.main.mainactivity");
startActivity(intent);