是否可以在Android TextView周围绘制边框?


当前回答

试试看:

<shape>
    <solid android:color="@color/txt_white"/>
    <stroke android:width="1dip" android:color="@color/border_black"/>
</shape>

其他回答

这是我的“简单”助手类,它返回带有边框的ImageView。只需将其放在utils文件夹中,并按如下方式调用:

ImageView selectionBorder = BorderDrawer.generateBorderImageView(context, borderWidth, borderHeight, thickness, Color.Blue);

这是代码。

/**
 * Because creating a border is Rocket Science in Android.
 */
public class BorderDrawer
{
    public static ImageView generateBorderImageView(Context context, int borderWidth, int borderHeight, int borderThickness, int color)
    {
        ImageView mask = new ImageView(context);

        // Create the square to serve as the mask
        Bitmap squareMask = Bitmap.createBitmap(borderWidth - (borderThickness*2), borderHeight - (borderThickness*2), Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(squareMask);

        Paint paint = new Paint();
        paint.setStyle(Paint.Style.FILL);
        paint.setColor(color);
        canvas.drawRect(0.0f, 0.0f, (float)borderWidth, (float)borderHeight, paint);

        // Create the darkness bitmap
        Bitmap solidColor = Bitmap.createBitmap(borderWidth, borderHeight, Bitmap.Config.ARGB_8888);
        canvas = new Canvas(solidColor);

        paint.setStyle(Paint.Style.FILL);
        paint.setColor(color);
        canvas.drawRect(0.0f, 0.0f, borderWidth, borderHeight, paint);

        // Create the masked version of the darknessView
        Bitmap borderBitmap = Bitmap.createBitmap(borderWidth, borderHeight, Bitmap.Config.ARGB_8888);
        canvas = new Canvas(borderBitmap);

        Paint clearPaint = new Paint();
        clearPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));

        canvas.drawBitmap(solidColor, 0, 0, null);
        canvas.drawBitmap(squareMask, borderThickness, borderThickness, clearPaint);

        clearPaint.setXfermode(null);

        ImageView borderView = new ImageView(context);
        borderView.setImageBitmap(borderBitmap);

        return borderView;
    }
}

可以将可绘制的形状(矩形)设置为视图的背景。

<TextView android:text="Some text" android:background="@drawable/back"/>

和矩形drawable back.xml(放入res/drawable文件夹):

<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle" >
   <solid android:color="@android:color/white" />
   <stroke android:width="1dip" android:color="#4fa5d5"/>
</shape>

您可以使用@android:color/transparent作为纯色,使其具有透明的背景。您还可以使用填充将文本与边框分开。有关详细信息,请参阅:http://developer.android.com/guide/topics/resources/drawable-resource.html

我找到的最简单的解决方案(而且实际可行):

<TextView
    ...
    android:background="@android:drawable/editbox_background" />

更改康斯坦丁·布罗夫的答案,因为在我的情况下不起作用:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape android:shape="rectangle">
            <solid android:color="@android:color/white" />
            <stroke android:width="2dip" android:color="#4fa5d5"/>
            <corners android:radius="7dp"/>
        </shape>
    </item>
</selector>

compileSdkVersion 26(Android 8.0),minSdkVersion 21(Android 5.0),targetSdkV版本26,实现“com.android.support:appcompat-v7:26.1.0”,等级:4.1

  <View
    android:layout_width="match_parent"
    android:layout_height="2dp"
    android:background="@android:color/black" />

这段代码足够你可以放在任何地方