Question

我无法理解为什么我的吐司不会出现任何人可以帮助...我今天开始学习应用程序开发但我不明白这是什么问题... 我的应用程序没有任何错误，这是我的编程书中的工作练习

    package com.example.geoquiz;
    import android.widget.Button;
    import android.widget.Toast;
    import android.os.Bundle;
    import android.app.Activity;
    import android.view.Menu;
    import android.view.View;

    public class QuizActivity extends Activity {
        private Button but1;
        private Button but2;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_quiz);
            but1 = (Button) findViewById(R.id.true_button);
            but1.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View v) {
                    Toast.makeText(QuizActivity.this,R.string.correct_toast, Toast.LENGTH_SHORT).show();

                }
            });
            but2 = (Button) findViewById(R.id.false_button);

            but2.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View v) {
                    Toast.makeText(QuizActivity.this, R.string.incorect_toast, Toast.LENGTH_SHORT).show();

                }
            });

        }
        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
            // Inflate the menu; this adds items to the action bar if it is present.
            getMenuInflater().inflate(R.menu.quiz, menu);
            return true;
        }

    }

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical" >

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:padding="24dp"
    android:text="@string/question_text" />

<LinearLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:orientation="horizontal" >

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/true_button"
        android:id ="@+id/true_button" />


    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/false_button"
        android:id ="@+id/false_button" />

    </LinearLayout>

</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">GeoQuiz</string>
    <string name="hello_world">Hello world!</string>
    <string name ="question_text">Gabriel este un baiat destept ?</string>
    <string name ="true_button">TRUE</string>
    <string name ="false_button">FALSE</string>
    <string name ="action_settings">Settings</string>
    <string name ="correct_toast">RaspunsCorect</string>
    <string name ="incorect_toast">RaspunsIncorect</string>

</resources>

Answer 1

试试这个。进入你的xml，然后在你要制作吐司文字的按钮上添加

 android:onClick="ToastButtonClicked" />

^进入它。

然后使用以下代码制作吐司文本。

}
public void ToastButtonClicked(View view)
{
Toast.makeText(this,R.string.correct_toast, Toast.LENGTH_SHORT).show();
}

Answer 2

尝试替换

Toast.makeText(QuizActivity.this,R.string.correct_toast, Toast.LENGTH_SHORT).show();

与

Toast.makeText(getApplicationContext(),R.string.correct_toast, Toast.LENGTH_SHORT).show();

Answer 3

替换此

Toast.makeText(QuizActivity.this,R.string.correct_toast, Toast.LENGTH_SHORT).show();

与

Toast.makeText(QuizActivity.this,"Correct Toast", Toast.LENGTH_SHORT).show（）;

可能会帮助你

吐司在我的活动中没有正确显示

3 个答案: