java - Android Studio 中的文本重复器

Question

我正在学习 Android 并正在做一个简单的文本转发器应用程序。我现在遇到一个问题。

我有这个代码

package eu.make4u.myapplication;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {

    EditText et_input, et_output, et_number;
    Button b_go;

    String text ="";

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

        et_input = (EditText) findViewById(R.id.et_input);
        et_output = (EditText) findViewById(R.id.et_output);
        et_number = (EditText) findViewById(R.id.et_number);
        b_go = (Button) findViewById(R.id.b_go);

        b_go.setOnClickListener(new.View.OnClickListener()) {
            @Override

            public void onClick(View v){
                String input = et_input.getText().toString();
                int number = Integer.parseInt(et_number.getText().toString());

                for (int i=0; i < number; i++){
                    text = text + input + " ";
                }
                et_output.setText(text);
        }
    });
    }
}

我有 5 个错误

我正在学习这门类(class)https://www.youtube.com/watch?v=trMTw1rx30I

我找不到任何错误，有人可以帮助我吗？

Answer 1

您遇到了一些与括号相关的语法问题。已修复:

public class MainActivity extends AppCompatActivity {

    EditText et_input, et_output, et_number;
    Button b_go;

    String text ="";

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

        et_input = (EditText) findViewById(R.id.et_input);
        et_output = (EditText) findViewById(R.id.et_output);
        et_number = (EditText) findViewById(R.id.et_number);
        b_go = (Button) findViewById(R.id.b_go);

        b_go.setOnClickListener(new View.OnClickListener() { //you had an extra bracket here
            @Override

            public void onClick(View v){
                String input = et_input.getText().toString();
                int number = Integer.parseInt(et_number.getText().toString());

                for (int i=0; i < number; i++){
                    text = text + input + " ";
                }
                et_output.setText(text);
            }
        });
    }
}