如何将我的信息连接到我的 Toast 消息

Question

package edu.apsu.assignment4;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.CompoundButton;
import android.widget.EditText;
import android.widget.Toast;
import android.view.View.OnClickListener;
import android.widget.RadioGroup;
import android.widget.CheckBox;
import android.widget.TextView;

public class MainActivity extends Activity implements
android.view.View.OnClickListener, CompoundButton.OnCheckedChangeListener {
    Button sendButton,aboutButton;
    EditText DrinkNum;
    Double subtotal;
    TextView order,aboutApp,Sroom,drinkType,Croom,go,flavor;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        RadioGroup drink = (RadioGroup) findViewById(R.id.drinks);
        drink.setOnClickListener(this);
        CheckBox Croom = (CheckBox) findViewById(R.id.cream);
        Croom.setOnCheckedChangeListener(this);
        DrinkNum=(EditText) findViewById(R.id.editText1);
        sendButton=(Button) findViewById(R.id.send);
        sendButton.setOnClickListener(this);
        aboutButton=(Button) findViewById(R.id.about);
        aboutButton.setOnClickListener(this);
    }


        @Override
        public void onClick(android.view.View v) {

            RadioGroup drinkGroup = (RadioGroup) findViewById(R.id.drinks);
            switch (drinkGroup.getCheckedRadioButtonId()) {
            case R.id.coffee:
                drinkType.setText("coffee");
                subtotal=2.50;
                break;
            case R.id.cappuccino:
                drinkType.setText("cappuccinno");
                subtotal=4.50;
                break;
            case R.id.espresso:
                drinkType.setText("espresso");
                subtotal=4.50;
            case R.id.latte:
                drinkType.setText("latte");
                subtotal=4.50;
                break;
            case R.id.iced_latte:
                drinkType.setText("iced_latte");
                subtotal=5.00;
                break;
            }
            order.setText("Subtotal: "+subtotal+ "Tax: "+subtotal*.09+"Total: "+subtotal+subtotal*.09);
        }


    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        Croom= (TextView) findViewById(R.id.cream);
        Sroom= (TextView) findViewById(R.id.sugar);
        go= (TextView) findViewById(R.id.go);
        flavor= (TextView) findViewById(R.id.flavoring);
        if (buttonView.getId() == R.id.cream) {
            if (isChecked) {
                Croom.setText("Room for cream");
            } else {
                Croom.setText("No room for cream");
            }
        }
            else if (buttonView.getId() == R.id.sugar) {
            if (isChecked) {
                Sroom.setText("Room for sugar");
            } else {
                Sroom.setText("No room for sugar");
            }
        }
            else if (buttonView.getId() == R.id.go) {
                if (isChecked) {
                    go.setText("To go");
                } else {
                    go.setText("Stay");
                }
            }
            else if (buttonView.getId() == R.id.chocolate) {
                if (isChecked) {
                    flavor.setText("Chocolate flavoring");
                }
            }
            else if (buttonView.getId() == R.id.cherry) {
                if (isChecked) {
                    flavor.setText("Cherry flavoring");
                }
            }
            else if (buttonView.getId() == R.id.vanilla) {
                if (isChecked) {
                    flavor.setText("Vanilla flavoring");
                }
            }

    aboutButton.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View arg7) {
        // TODO Auto-generated method stub
            Toast.makeText(getApplicationContext(), "*In boxer announcer voice*: "+"n"+"Credit is given to me.", Toast.LENGTH_LONG).show();    
        }
    });


    sendButton.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View arg8) {
            String message;
            message = "Number of cups: "+DrinkNum+"n"+go+"n"
            +Croom+"n"+Sroom+"n"+"Drink type: "+drinkType+"n"+"Flavoring: "+flavor
            +"n"+"Price details: "+order+"n"+"Thanks for ordering";

            Toast.makeText(getApplicationContext(), message, Toast.LENGTH_LONG).show(); 
            }
        });
    }

}

我的第二条吐司消息没有连接我与早期代码中的信息。另外，我不能只选择一个单选按钮，如果我单击任何其他按钮，它们也会被选中。如何解决这两个问题？

Answer 1

对于您的第一个问题，您正在尝试将类型为 EditText（或 View）的 DrinkNum 连接到字符串。这是不可能的，如果它编译，我会感到惊讶。

为了解决您的第二个问题，您在整个RadioGroup中附加了一个onClickListener。这意味着，如果单击组内的任何RadioButton's，将执行onClickListener's onClick()方法。