想折腾一个android计算器,但是暂时没有实现连续加减运算。
public class MainActivity extends AppCompatActivity { private TextView textView; private String display=""; private String currentOperator; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textView=(TextView)findViewById(R.id.text); textV