如何使用自定义布局作为 RadioButton 标签

How to use a custom layout as RadioButton label

我制作了一个要为 RadioButton 实现的自定义布局。 android class 的代码在这里:

public class MyRadioButton extends LinearLayout implements View.OnClickListener{
    private ImageView iv;
    private TextView tv;
    private RadioButton rb;

    private View view;

    public MyRadioButton(Context context) {
        super(context);
        view = View.inflate(context, R.layout.my_radio_button, this);
        setOrientation(HORIZONTAL);

        rb = (RadioButton) view.findViewById(R.id.radioButton1);
        tv = (TextView) view.findViewById(R.id.textView1);
        iv = (ImageView) view.findViewById(R.id.imageView1);

        view.setOnClickListener(this);
        rb.setOnCheckedChangeListener(null);
    }

    public void setImageBitmap(Bitmap bitmap) {
        iv.setImageBitmap(bitmap);
    }

    public View getView() {
        return view;
    }

    @Override
    public void onClick(View v) {

        boolean nextState = !rb.isChecked();

        LinearLayout lGroup = (LinearLayout)view.getParent();
        if(lGroup != null){
            int child = lGroup.getChildCount();
            for(int i=0; i<child; i++){
                //uncheck all
                ((RadioButton)lGroup.getChildAt(i).findViewById(R.id.radioButton1)).setChecked(false);
            }
        }

        rb.setChecked(nextState);
    }

    public void setImage(Bitmap b){
        iv.setImageBitmap(b);
    }

    public void setText(String text){
        tv.setText(text);
    }

    public void setChecked(boolean isChecked){
        rb.setChecked(isChecked);
    }
}

布局代码在这里

 <?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="center_vertical"
    android:orientation="horizontal" >

    <RadioButton
        android:id="@+id/radioButton1"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:gravity="top"
        android:text="" />

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

        <TextView
            android:id="@+id/textView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Medium Text"
            android:textAppearance="?android:attr/textAppearanceMedium" />

        <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/wow_visa_prepaid" />

    </LinearLayout>
</LinearLayout>

此刻,我不知道如何将继承从 LinearLayout 更改为 RadioButton 并保持相同的布局。

这个应该喜欢但是有圆角

我试过下面的代码,它工作正常,没有错误:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:orientation="horizontal"
tools:context=".MainActivity">

<com.example.myapplication.MyRadioButton
    android:layout_width="match_parent"
    android:layout_height="wrap_content"/>
</LinearLayout>

更改以下代码后:

public MyRadioButton(Context context) {

到以下代码:

 public MyRadioButton(Context context, AttributeSet attributes) {

这是您需要的解决方案吗?

有两种方法可以完成这项工作:

1. 当我们听说自定义视图时,它驱使我们重写 onDraw 方法,然后将我们想要的内容绘制到视图的 Canvas 中。

2. 在这种情况下,有一个更简单的方法,使用drawableLeft。在这里,我扩展了 AppCompatRadioButton 并将考虑的布局设置为 drawableLeft.


MyRadioButton.java

package com.aminography.radiobutton;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

import com.bumptech.glide.Glide;
import com.bumptech.glide.load.DataSource;
import com.bumptech.glide.load.MultiTransformation;
import com.bumptech.glide.load.engine.GlideException;
import com.bumptech.glide.load.resource.bitmap.CenterCrop;
import com.bumptech.glide.request.RequestListener;
import com.bumptech.glide.request.RequestOptions;
import com.bumptech.glide.request.target.Target;

import jp.wasabeef.glide.transformations.MaskTransformation;

// TODO: If you are using androidx
import androidx.annotation.Nullable;
import androidx.appcompat.widget.AppCompatRadioButton;

// TODO: If you are using appcompat
//import android.support.annotation.Nullable;
//import android.support.v7.widget.AppCompatRadioButton;

public class MyRadioButton extends AppCompatRadioButton {

    private View view;
    private TextView textView;
    private ImageView imageView;

    public MyRadioButton(Context context) {
        super(context);
        init(context);
    }

    public MyRadioButton(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(context);
    }

    public MyRadioButton(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(context);
    }

   private RequestListener<Bitmap> requestListener = new RequestListener<Bitmap>() {
        @Override
        public boolean onLoadFailed(@Nullable GlideException e, Object model, Target<Bitmap> target, boolean isFirstResource) {
            return false;
        }

        @Override
        public boolean onResourceReady(Bitmap resource, Object model, Target<Bitmap> target, DataSource dataSource, boolean isFirstResource) {
            imageView.setImageBitmap(resource);
            redrawLayout();
            return false;
        }
    };

    public void setImageResource(int resId) {
        Glide.with(getContext())
                .asBitmap()
                .load(resId)
                .apply(RequestOptions.bitmapTransform(
                        new MultiTransformation<>(
                                new CenterCrop(),
                                new RoundedCornersTransformation(dp2px(getContext(), 24), 0, RoundedCornersTransformation.CornerType.ALL))
                        )
                )
                .listener(requestListener)
                .submit();
    }

    public void setImageBitmap(Bitmap bitmap) {
        Glide.with(getContext())
                .asBitmap()
                .load(bitmap)
                .apply(RequestOptions.bitmapTransform(
                        new MultiTransformation<>(
                                new CenterCrop(),
                                new RoundedCornersTransformation(dp2px(getContext(), 24), 0, RoundedCornersTransformation.CornerType.ALL))
                        )
                )
                .listener(requestListener)
                .submit();
    }

    // setText is a final method in ancestor, so we must take another name.
    public void setTextWith(int resId) {
        textView.setText(resId);
        redrawLayout();
    }

    public void setTextWith(CharSequence text) {
        textView.setText(text);
        redrawLayout();
    }

    private void init(Context context) {
        view = LayoutInflater.from(context).inflate(R.layout.my_radio_button_content, null);
        textView = view.findViewById(R.id.textView);
        imageView = view.findViewById(R.id.imageView);
        redrawLayout();
    }

    private void redrawLayout() {
        view.setDrawingCacheEnabled(true);
        view.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
        view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());

        view.buildDrawingCache(true);
        Bitmap bitmap = Bitmap.createBitmap(view.getDrawingCache());
        setCompoundDrawablesWithIntrinsicBounds(new BitmapDrawable(getResources(), bitmap), null, null, null);
        view.setDrawingCacheEnabled(false);
    }

    private int dp2px(Context context, int dp) {
        return (int) (dp * context.getResources().getDisplayMetrics().density);
    }

}

my_radio_button_content.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:gravity="center_horizontal"
    android:orientation="vertical">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Medium Text"
        android:textAppearance="?android:attr/textAppearanceMedium" />

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="96dp"
        android:layout_height="64dp"
        android:src="@drawable/img_visa" />

</LinearLayout>


视觉结果:


注:

1. 如果您在项目中使用 appcompat,请在 class 顶部注释 androidx 导入并取消注释 appcompat 一个。

2. 您只需更改 android:paddingLeft 即可更改自定义布局的位置 RadioButton:

<com.aminography.radiobutton.MyRadioButton
    android:id="@+id/radioButton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:paddingLeft="8dp" />



已编辑:

我使用 GlideGlide-Transformations 重写了代码以满足圆角图像的要求。

build.gradle

dependencies {
    implementation 'com.github.bumptech.glide:glide:4.9.0'
    implementation 'jp.wasabeef:glide-transformations:3.3.0'
}

1. 创建 class 时,扩展 LinearLayout 或 FrameLayout, .xml布局文件(my_radio_button_content.xml), 必须以“merge”而不是 "LinearLayout" 开头,否则它 将是 LinearLayot(.xml) 在 LinearLayout( 你的 class).

<merge>
    <RadioButton
        android:id="@+id/radioButton1"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:gravity="top"
        android:text="" />

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

        <TextView
            android:id="@+id/textView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="Medium Text"
            android:textAppearance="?android:attr/textAppearanceMedium" />

        <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/wow_visa_prepaid" />
    </LinearLayout>
</merge>

2.很容易创建:final ArrayList<MyRadioButton>,传过去 to all children,如果你要兄弟们就各换一个 其他

public MyRadioButton(Context context) {
   super(context);
   inflate(context, R.layout.my_radio_button, this); 
}

public void SetMyViewClickable(final ArrayList<String> brothers) {
    setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            for (View brother:brothers) {
                ((RadioButton)brother.findViewById(R.id.radioButton1)).setChecked(false);
            }
        }
    });
}

有很多方法可以做到这一点,例如,您可以使用以下库