在Android按钮编程中感到困惑

Question

当我按下按钮时，我有一些ImageButton，一个接一个的字母必须显示在我的EditText中。如果它与我给定的字母不匹配，那么我的图像就会振动。请帮我，我是安卓系统的新手。这是我的代码包com.example.image；

public class MainActivity extends ActionBarActivity {
@Override
 protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
     final ImageButton button1;
    final ImageButton button2;
    final ImageButton button3;
    final EditText input;
    Button chk;
     chk =(Button) findViewById(R.id.button1);
     button1 =(ImageButton) findViewById(R.id.imageButton1);
    button2 =(ImageButton) findViewById(R.id.imageButton2);
    button3 =(ImageButton) findViewById(R.id.imageButton3);
    input =(EditText) findViewById(R.id.editText1);
     button1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
             // TODO Auto-generated method stub
             input.setText("a");
        }
    });
    button2.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
             // TODO Auto-generated method stub
             input.setText("B");
         }
    });
    button3.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            ;
            input.setText("C");
        }
     });

    chk.setOnClickListener(new View.OnClickListener() {
         @Override
        public void onClick(View v) {
             // TODO Auto-generated method stub
             String check = input.getText().toString();
             if(check.contentEquals("ABC")){
                Vibrator vib =   (Vibrator)getSystemService(Context.VIBRATOR_SERVICE);
                // Vibrate for 100ms
                 vib.vibrate(300);
                 }
             else{
                input.setText("");
                Vibrator vib =  (Vibrator)getSystemService(Context.VIBRATOR_SERVICE);
                // Vibrate for 100ms
                vib.vibrate(300);
             }
        }

        });
       }
}

Answer 1

也许这就是答案：

button1.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
         // TODO Auto-generated method stub
         input.setText(input.getText() + "A");
    }
});
button2.setOnClickListener(new View.OnClickListener() {
     @Override
     public void onClick(View v) {
         // TODO Auto-generated method stub
         input.setText(input.getText() + "B");
     }
});
button3.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        // TODO Auto-generated method stub
        ;
        input.setText(input.getText() + "C");
    }
 });

Answer 2

创建一个类似以下的方法

private void updateText(String char){
     String inputText = input.getText().toString() + char;
 input.setText(inputText);
 }

然后从所有按钮（按钮1、按钮2、按钮3）调用此方法，单击类似的侦听器

 button1.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
         // TODO Auto-generated method stub
         updateText("A");
    }
});