android - 如何使用自定义布局作为 RadioButton 标签
问题描述
我制作了一个自定义布局,我想为RadioButton
. android类的代码在这里:
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>
目前,我无法弄清楚如何将继承从LinearLayout
to更改为RadioButton
并保持相同的布局。
解决方案
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中Canvas
。
2.在这种情况下,有一种更简单的方法,使用drawableLeft
. 在这里,我扩展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:
笔记:
1.如果您appcompat
在项目中使用,请androidx
在类顶部注释导入并取消注释appcompat
。
2.您可以更改自定义布局的位置,只需更改android:paddingLeft
您的RadioButton
:
<com.aminography.radiobutton.MyRadioButton
android:id="@+id/radioButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="8dp" />
编辑:
Glide
我已经重写了代码以使用和来满足圆角图像的要求Glide-Transformations
。
构建.gradle
dependencies {
implementation 'com.github.bumptech.glide:glide:4.9.0'
implementation 'jp.wasabeef:glide-transformations:3.3.0'
}
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