9.29

import android.content.Intent;

import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;

import android.view.View;

 

public class MainActivity extends AppCompatActivity {

 

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

    }

 

    // 启动另一个 Activity 的按钮点击事件处理

    public void startSecondActivity(View view) {

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

        startActivity(intent);

    }

}