启动,关闭Activity的两种方法

1. startActivity(Intent intent): 启动其他Activity

　　对应关闭方法finish():结束当前Activity

public class MainActivity extends AppCompatActivity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// 获取应用程序中的bn按钮
Button bn = (Button) findViewById(R.id.bn);
// 为bn按钮绑定事件监听器
bn.setOnClickListener(new View.OnClickListener()
{
@Override
public void onClick(View source)
{
// 创建需要启动的Activity对应的Intent
Intent intent = new Intent(MainActivity.this,
SecondActivity.class);
// 启动intent对应的Activity
startActivity(intent);
}
});
}
}

2. startActivityForResult(Intent intent, int requestCode)

　　对应关闭方法: finishActivity(int requestCode) 结束以 startActivityForResult(Intent intent, int requestCode)方法启动的Activity