java - 如何使用Android Studio将三个EditText一一填充？

Question

这段代码运行得很好。我希望它更简单，就像使用 nextFocusLeft、nextFocusRight 和 nextFocusForward 一样。我的代码包含很多 if 和 if else。

    public class MainActivity extends AppCompatActivity implements View.OnClickListener {
            //my buttons
                Button b1, b2,b3;
                //my Empty editText to fill them by my buttons one by one
                EditText t1,t2,t3;

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



                    b1 = (Button) findViewById(R.id.b1);
                    b2 = (Button) findViewById(R.id.b2);
                    b3 = (Button) findViewById(R.id.b3);



                    t1 = (EditText) findViewById(R.id.t1);
                    t2 = (EditText) findViewById(R.id.t2);
                    t3 = (EditText) findViewById(R.id.t3);

                    b1.setOnClickListener(this);
                    b2.setOnClickListener(this);
                    b3.setOnClickListener(this);




                }


                @Override
                public void onClick(View view) {

                    switch (view.getId()){
                        case R.id.b1:


                         //check if editText Empty or not
                            if (t1.getText().toString().equals("")){

                                t1.setText(t1.getText().toString() + b1.getText());

                            }else if (t2.getText().toString().equals("")){

                                t2.setText(t2.getText().toString() + b1.getText());
                            }else if (t3.getText().toString().equals("")){

                                t3.setText(t3.getText().toString() + b1.getText());
                            }

                            break;


                        case R.id.b2:

                           //check if editText Empty or not

                            if (t1.getText().toString().equals("")){

                                t1.setText(t1.getText().toString() + b2.getText());

                            }else if (t2.getText().toString().equals("")){

                                t2.setText(t2.getText().toString() + b2.getText());
                            }else if (t3.getText().toString().equals("")){

                                t3.setText(t3.getText().toString() + b2.getText());
                            }

                            break;


                        case R.id.b3:

                           //check if editText Empty or not

                            if (t1.getText().toString().equals("")){

                                t1.setText(t1.getText().toString() + b3.getText());

                            }else if (t2.getText().toString().equals("")){

                                t2.setText(t2.getText().toString() + b3.getText());
                            }else if (t3.getText().toString().equals("")){

                                t3.setText(t3.getText().toString() + b3.getText());
                            }

                            break;




                    }
                        //check Answer 
                       //correct answer ABC
                        if (t1.getText().toString().equals("A") &&
                            t2.getText().toString().equals("B") &&
                            t3.getText().toString().equals("C") ){

                       //if answer correct do
                        t1.setBackgroundResource(R.drawable.bg);
                        t2.setBackgroundResource(R.drawable.bg);
                        t3.setBackgroundResource(R.drawable.bg);


                    }


                }
            }

Answer 1

这看起来好一点..

@Override
public void onClick(View view) {
    final Button button = findViewById(view.getId());
    final String text = button.getText();

    //check if editText Empty or not
    if (t1.getText().toString().equals("")) {
        t1.setText(t1.getText().toString() + text);
    }else if (t2.getText().toString().equals("")) {
        t2.setText(t2.getText().toString() + text);
    }else if (t3.getText().toString().equals("")) {
        t3.setText(t3.getText().toString() + text);
    }
}