Button控制元件

1. 文字大小，顏色

2. 自定義背景形狀

3. 自定義按壓效果

4. 點選事件

XML

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:padding="15dp">
  
​
  <Button
    android:id="@+id/btn_1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="#FB1707"
    android:text="按鈕1"
    android:textColor="#FFFFFF"
    android:textSize="24sp" />
​
  <Button
    android:id="@+id/btn_2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/btn_1"
    android:layout_marginTop="10dp"
    android:background="@drawable/bg_btn2"
    android:text="按鈕2"
    android:textColor="#000000"
    android:textSize="24sp" />
​
  <Button
    android:id="@+id/btn_3"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/btn_2"
    android:layout_marginTop="10dp"
    android:background="@drawable/bg_btn3"
    android:text="按鈕3"
    android:textColor="#000000"
    android:textSize="24sp" />
​
  <Button
    android:id="@+id/btn_4"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_below="@id/btn_3"
    android:layout_marginTop="10dp"
    android:background="@drawable/bg_btn4"
    android:text="按鈕4"
    android:onClick="showToast "
    android:textColor="#000000"
    android:textSize="24sp"
    tools:ignore="OnClick" />
​
  <TextView
    android:id="@+id/tv_1"
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:text="文字1"
    android:textSize="24sp"
    android:textColor="#000000"
    android:background="@drawable/bg_btn2"
    android:layout_below="@id/btn_4"
    android:gravity="center"/>
​
​
</RelativeLayout>
 

java：

package com.example.androidprojiect04;
​
import androidx.appcompat.app.AppCompatActivity;
​
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
​
public class ButtonActivity extends AppCompatActivity {
  private Button mbtn3;
  private TextView mtv1;
​
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_button);
    mbtn3 = findViewById(R.id.btn_3);
    mbtn3.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View view) {
        Toast.makeText(ButtonActivity.this,"11111111",Toast.LENGTH_LONG).show();
       }
     });
    mtv1 = findViewById(R.id.tv_1);
    mtv1.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View view) {
        Toast.makeText(ButtonActivity.this,"Tv1",Toast.LENGTH_LONG).show();
       }
     });
   }
  public void showToast(View view){
    Toast.makeText(this,"11111111",Toast.LENGTH_LONG).show();
   }
}