关闭android前重启活动

public class MainActivity extends AppCompatActivity {
    private String mText;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        if (savedInstanceState != null) {
            // 从已保存的状态数据中恢复
            mText = savedInstanceState.getString("text");
        }

        // 其他初始化操作...

        // 设置按钮点击事件
        Button button = findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // 关闭活动
                finish();
            }
        });
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        // 保存状态数据
        outState.putString("text", mText);
    }
}