组合控件——底部标签栏——自定义标签按钮

雨点打透心脏的1/2处 2023-09-28 23:02 82阅读 0赞

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**自定义标签按钮的步骤**

(1)定义一个状态图形的XML描述文件，当状态为选中时展示高亮图标，其余情况展示普通图标；

(2)在活动页面的XML文件中添加CheckBox节点，并给该节点的background、drawableTop、textColor三个属性分别设置对应的状态图形；

(3)活动页面的Java代码给复选框ck\_tab设置勾选监听器，用来监听复选框的选中事件和取消选中事件；

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布局：

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<?xml version="1.0" encoding="utf-8"?>
    <resources>
        <color name="colorPrimary">#008577</color>
        <color name="colorPrimaryDark">#00574B</color>
        <color name="colorAccent">#D81B60</color>
        <color name="black">#000000</color>
        <color name="white">#ffffff</color>
        <color name="purple_200">#FFBB86FC</color>
        <color name="purple_500">#FF6200EE</color>
        <color name="purple_700">#FF3700B3</color>
        <color name="teal_200">#FF03DAC5</color>
        <color name="teal_700">#FF018786</color>
        <color name="tab_text_selected">#0084e8</color>
        <color name="tab_text_normal">#7597b3</color>
    </resources>

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<resources>
    
        
        <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
            
            <item name="colorPrimary">@color/colorPrimary</item>
            <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
            <item name="colorAccent">@color/colorAccent</item>
            <item name="customButtonStyle">@style/CommonButton</item>
        </style>
    
        
        <style name="CommonButton">
            <item name="android:textAllCaps">false</item>
            <item name="android:textColor">#000000</item>
            <item name="android:textSize">20sp</item>
        </style>
    
    
    
        <style name="TabButton">
            <item name="android:layout_width">0dp</item>
            <item name="android:layout_height">match_parent</item>
            <item name="android:layout_weight">1</item>
            <item name="android:padding">5dp</item>
            <item name="android:gravity">center</item>
            <item name="android:background">@drawable/tab_bg_selector</item>
            <item name="android:textSize">12sp</item>
            <item name="android:textColor">@drawable/tab_text_selector</item>
            <item name="android:button">@null</item>
        </style>
    
    
    
    </resources>

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主代码：

package com.example.myapplication;
    import android.os.Bundle;
    import android.widget.CheckBox;
    import android.widget.CompoundButton;
    import android.widget.TextView;
    import androidx.appcompat.app.AppCompatActivity;
    
    public class MainActivity extends AppCompatActivity
    {
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
    
            final TextView tv_select = findViewById(R.id.tv_select);
            
            
            CheckBox ck_tab = findViewById(R.id.ck_tab);
    
            // 给复选框设置勾选监听器
            ck_tab.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener()
            {
                @Override
                public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
                {
                    if (buttonView.getId() == R.id.ck_tab)
                    {
                        String desc = String.format("标签按钮被%s了", isChecked?"选中":"取消选中");
                        tv_select.setText(desc);
                    }
                }
            });
        }
    
    }

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