
ไฟล์ที่เกี่ยวข้อง
- activity_main.xml
- MainActivity.java
activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="center" android:orientation="horizontal" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintTop_toTopOf="parent"> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="onClickA" android:text="Button A" /> <Button android:id="@+id/buttonB1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="onClickB" android:text="Button B1" /> <Button android:id="@+id/buttonB2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:onClick="onClickB" android:text="Button B2" /> </LinearLayout> </androidx.constraintlayout.widget.ConstraintLayout>
MainActivity.java
package com.phaisarn.myapplication; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Toast; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } public void onClickA(View view) { Toast.makeText(this, "Hello World!", Toast.LENGTH_SHORT).show(); } public void onClickB(View view) { switch (view.getId()) { case R.id.buttonB1: Toast.makeText(this, "Hello B1", Toast.LENGTH_SHORT).show(); break; case R.id.buttonB2: Toast.makeText(this, "Hello B2", Toast.LENGTH_SHORT).show(); break; } } }