1.匿名内部类

Button bt_dial = (Button) findViewById(R.id.bt_dial);
bt_dial.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
点击操作
}
});

2.自定义单击事件监听类

Button bt_dial = (Button) findViewById(R.id.bt_dial);
bt_dial.setOnClickListener(new MyListener());

private class MyListener implements View.OnClickListener {
@Override
public void onClick(View view) {
点击操作
}

3.Activity继承View.OnClickListener

public class MainActivity extends Activity implements View.OnClickListener {
    EditText et_number;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        et_number = (EditText)    MainActivity.this.findViewById(R.id.et_number);        
    Button bt_dial = (Button) findViewById(R.id.bt_dial);
        bt_dial.setOnClickListener(this); 
    }
 
    public void onClick(View view) { 
        switch (view.getId()){
            case R.id.bt_dial:
                点击操作
                break;
            default:
                break;
        }
    }
}

4.在XML文件中显示指定按钮的onClick属性

public void dialPhoneMethod(View view){
       点击操作
    }