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复选框

如上图所示。此屏幕截图包含三个视图。
- 第一项CheckBox带有文本且状态为关闭。
- 第二个项目CheckBox没有文字并且有状态。
- 最后一项是ImageViewsrc 指向可绘制图像。

CheckBoxes 是使用自定义的android:button。

小复选框

当我尝试使用较小的图像时，所有复选框都是左对齐的。

比较这两个图像告诉我，默认大小CheckBox似乎固定为某个大小，直到文本属性大到足以需要扩展。

文件中也没有什么特别之处。见下文。

custom_cb.xml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@drawable/creditcard_selected" android:state_checked="true" />
    <item android:drawable="@drawable/creditcard"/>

</selector>

布局.xml

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent">
    <CheckBox android:id="@+id/cbFalse"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:button="@drawable/custom_cb"
              android:text="" />
    <CheckBox android:id="@+id/cbTrue"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:button="@drawable/custom_cb"
              android:focusable="false"
              android:checked="true"
              android:layout_toRightOf="@id/cbFalse" />
    <ImageView android:id="@+id/imvTrue"
              android:layout_width="wrap_content"
              android:layout_height="wrap_content"
              android:src="@drawable/creditcard"
              android:layout_toRightOf="@id/cbTrue" />
</RelativeLayout>

无论如何我可以在保持尺寸不变的同时为 CheckBox 使用更大的图像wrap_content吗？如果我将 CheckBox 设置layout_width为实际像素或 dp，那么它会显示完整图像，但这意味着我必须在每次更改时手动检查大小。

4

6 回答 6

62

今天我遇到了同样的问题（我的自定义图像在左侧被切割）。我把它修好了：

android:button="@null"
android:background="@drawable/my_custom_checkbox_state.xml"
于 2013-07-26T08:02:48.627 回答
15

只需使用

android:button="@null"
android:background="@null"
android:drawableLeft="your custom selector"
android:drawablePadding="as you need"
android:text="your text"

就是这样..它工作正常..

于 2013-11-08T14:45:02.793 回答
4

您只需要将您的可绘制对象从 更改android:button为android:drawableLeft或android:drawableRight。并将按钮设置为 null 以不显示默认复选框。

我的复选框如下所示：

<CheckBox
   android:id="@+id/cb_toggle_switch"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:button="@null"
   android:drawableLeft="@drawable/livescore_btn_check" />
于 2014-03-31T11:24:04.007 回答
2

CheckBox drawables 根本不适合我，android:button并且android:background给出了完全不稳定的结果，没有什么可以解决它。

所以我写了我自己的“自定义复选框”。

import android.annotation.TargetApi;
import android.content.Context;
import android.content.res.TypedArray;
import android.os.Parcel;
import android.os.Parcelable;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;

import org.apache.commons.lang3.StringUtils;

import butterknife.Bind;
import butterknife.ButterKnife;
import com.example.myapp.R;

/**
 * Created by Zhuinden on 2015.12.02..
 */
public class CustomCheckbox
        extends LinearLayout
        implements View.OnClickListener {
    public CustomCheckbox(Context context) {
        super(context);
        init(null, -1);
    }

    public CustomCheckbox(Context context, AttributeSet attrs) {
        super(context, attrs);
        init(attrs, -1);
    }

    @TargetApi(11)
    public CustomCheckbox(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(attrs, defStyleAttr);
    }

    @TargetApi(21)
    public CustomCheckbox(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
        init(attrs, defStyleAttr);
    }

    private void init(AttributeSet attributeSet, int defStyle) {
        TypedArray a = null;
        if(defStyle != -1) {
            a = getContext().obtainStyledAttributes(attributeSet, R.styleable.CustomCheckbox, defStyle, 0);
        } else {
            a = getContext().obtainStyledAttributes(attributeSet, R.styleable.CustomCheckbox);
        }
        defImageRes = a.getResourceId(0, 0);
        checkedImageRes = a.getResourceId(1, 0);
        checked = a.getBoolean(2, false);
        typeface = a.getString(3);
        if(StringUtils.isEmpty(typeface)) {
            typeface = "Oswald-Book.otf";
        }
        text = a.getString(4);
        inactiveTextcolor = a.getInteger(5, android.R.color.black);
        activeTextcolor = a.getInteger(6, android.R.color.red);
        textsize = a.getDimensionPixelSize(7, 0);
        a.recycle();
        setOnClickListener(this);
        if(!isInEditMode()) {
            LayoutInflater.from(getContext()).inflate(R.layout.view_custom_checkbox, this, true);
            ButterKnife.bind(this);
            imageView.setImageResource(checked ? checkedImageRes : defImageRes);
            typefaceTextView.setTypeface(typeface);
            if(!StringUtils.isEmpty(text)) {
                typefaceTextView.setText(text);
            }
            if(textsize != 0) {
                typefaceTextView.setTextSize(TypedValue.COMPLEX_UNIT_PX, textsize);
            } else {
                typefaceTextView.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 12);
            }
        }
    }

    boolean checked;
    int defImageRes;
    int checkedImageRes;
    String typeface;
    String text;
    int inactiveTextcolor;
    int activeTextcolor;
    int textsize;

    OnCheckedChangeListener onCheckedChangeListener;

    @Bind(R.id.custom_checkbox_imageview)
    ImageView imageView;

    @Bind(R.id.custom_checkbox_text)
    TypefaceTextView typefaceTextView;

    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();
    }

    @Override
    public void onClick(View v) {
        checked = !checked;
        imageView.setImageResource(checked ? checkedImageRes : defImageRes);
        typefaceTextView.setTextColor(checked ? activeTextcolor : inactiveTextcolor);
        onCheckedChangeListener.onCheckedChanged(this, checked);
    }

    public void setOnCheckedChangeListener(OnCheckedChangeListener onCheckedChangeListener) {
        this.onCheckedChangeListener = onCheckedChangeListener;
    }

    public static interface OnCheckedChangeListener {
        void onCheckedChanged(View buttonView, boolean isChecked);
    }

    public boolean isChecked() {
        return checked;
    }

    public void setChecked(boolean checked) {
        this.checked = checked;
        imageView.setImageResource(checked ? checkedImageRes : defImageRes);
        typefaceTextView.setTextColor(checked ? activeTextcolor : inactiveTextcolor);
    }

    public void setTextColor(int color) {
        typefaceTextView.setTextColor(color);
    }



    @Override
    public Parcelable onSaveInstanceState() {
        //begin boilerplate code that allows parent classes to save state
        Parcelable superState = super.onSaveInstanceState();

        SavedState ss = new SavedState(superState);
        //end

        ss.checked = this.checked;
        ss.defImageRes = this.defImageRes;
        ss.checkedImageRes = this.checkedImageRes;
        ss.typeface = this.typeface;
        ss.text = this.text;
        ss.inactiveTextcolor = this.inactiveTextcolor;
        ss.activeTextcolor = this.activeTextcolor;
        ss.textsize = this.textsize;

        return ss;
    }

    @Override
    public void onRestoreInstanceState(Parcelable state) {
        //begin boilerplate code so parent classes can restore state
        if(!(state instanceof SavedState)) {
            super.onRestoreInstanceState(state);
            return;
        }

        SavedState ss = (SavedState) state;
        super.onRestoreInstanceState(ss.getSuperState());
        //end

        this.checked = ss.checked;
        this.defImageRes = ss.defImageRes;
        this.checkedImageRes = ss.checkedImageRes;
        this.typeface = ss.typeface;
        this.text = ss.text;
        this.inactiveTextcolor = ss.inactiveTextcolor;
        this.activeTextcolor = ss.activeTextcolor;
        this.textsize = ss.textsize;
    }

    static class SavedState
            extends BaseSavedState {
        boolean checked;
        int defImageRes;
        int checkedImageRes;
        String typeface;
        String text;
        int inactiveTextcolor;
        int activeTextcolor;
        int textsize;

        SavedState(Parcelable superState) {
            super(superState);
        }

        private SavedState(Parcel in) {
            super(in);
            this.checked = in.readByte() > 0;
            this.defImageRes = in.readInt();
            this.checkedImageRes = in.readInt();
            this.typeface = in.readString();
            this.text = in.readString();
            this.inactiveTextcolor = in.readInt();
            this.activeTextcolor = in.readInt();
            this.textsize = in.readInt();
        }

        @Override
        public void writeToParcel(Parcel out, int flags) {
            super.writeToParcel(out, flags);
            out.writeByte(this.checked ? (byte) 0x01 : (byte) 0x00);
            out.writeInt(this.defImageRes);
            out.writeInt(this.checkedImageRes);
            out.writeString(this.typeface);
            out.writeString(this.text);
            out.writeInt(this.inactiveTextcolor);
            out.writeInt(this.activeTextcolor);
            out.writeInt(this.textsize);
        }

        //required field that makes Parcelables from a Parcel
        public static final Parcelable.Creator<SavedState> CREATOR = new Parcelable.Creator<SavedState>() {
            public SavedState createFromParcel(Parcel in) {
                return new SavedState(in);
            }

            public SavedState[] newArray(int size) {
                return new SavedState[size];
            }
        };
    }
}

使用以下attrs.xml

<resources
    <declare-styleable name="CustomCheckbox">
        <attr name="default_img" format="integer"/>
        <attr name="checked_img" format="integer"/>
        <attr name="checked" format="boolean"/>
        <attr name="chx_typeface" format="string"/>
        <attr name="text" format="string"/>
        <attr name="inactive_textcolor" format="integer"/>
        <attr name="active_textcolor" format="integer"/>
        <attr name="textsize" format="dimension"/>
    </declare-styleable>
</resources>

具有以下view_custom_checkbox.xml布局：

<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android">
    <ImageView
        android:id="@+id/custom_checkbox_imageview"
        android:layout_width="@dimen/_15sdp"
        android:layout_height="@dimen/_15sdp"
        />

    <com.example.TypefaceTextView
        android:id="@+id/custom_checkbox_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>
</merge>

和例子：

                        <com.example.CustomCheckbox
                            android:id="@+id/program_info_record_button"
                            android:layout_width="wrap_content"
                            android:layout_height="match_parent"
                            android:layout_centerHorizontal="true"
                            android:clickable="true"
                            android:gravity="center"
                            app:default_img="@drawable/ic_recording_off"
                            app:checked_img="@drawable/ic_recording_on"
                            app:text="@string/record"
                            app:inactive_textcolor="@color/program_info_buttons_inactive"
                            app:active_textcolor="@color/active_color"
                            app:textsize="@dimen/programInfoButtonTextSize"
                            app:chx_typeface="SomeTypeface.otf"/>

必要时进行修改。

于 2015-12-02T15:37:29.883 回答
0

尝试使用水平方向的线性布局而不是相对布局。还可以在每个布局中使用权重来强制视图使用相同的宽度。

<?xml version="1.0" encoding="utf-8"?>
<LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"
          android:orientation="horizontal"
          android:layout_width="match_parent"
          android:layout_height="match_parent">
<CheckBox android:id="@+id/cbFalse"
          android:weight="1"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:button="@drawable/custom_cb"
          android:text="" />
<CheckBox android:id="@+id/cbTrue"
          android:weight="1"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:button="@drawable/custom_cb"
          android:focusable="false"
          android:checked="true"
          android:layout_toRightOf="@id/cbFalse" />
<ImageView android:id="@+id/imvTrue"
          android:weight="1"
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:src="@drawable/creditcard"
          android:layout_toRightOf="@id/cbTrue" />

于 2013-04-18T11:45:01.470 回答
0

也许它对某人有用，设置gravity属性来center帮助我避免图像裁剪：

<CheckBox
    android:id="@+id/cb_accept_agreement"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:gravity="center"
    android:button="@drawable/checkbox_selector"/>
于 2020-10-24T16:00:02.873 回答