是否可以在Android TextView周围绘制边框?
当前回答
可以将可绘制的形状(带角的矩形)设置为视图的背景。
<TextView android:background="@drawable/frame"/>
矩形可绘制框架.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="#3d4caf"/>
<corners android:radius="50dp"/>
</shape>
其他回答
创建一个边框视图,背景颜色作为边框的颜色和文本视图的大小。将边框视图填充设置为边框的宽度。将文本视图背景色设置为文本视图所需的颜色。现在在边框视图中添加文本视图。
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;
}
}
我找到了一种更好的方法来在TextView周围添加边框。
使用九块图像作为背景。它非常简单,SDK附带了一个制作9补丁图像的工具,而且它绝对不需要编码。
链接是http://developer.android.com/guide/topics/graphics/2d-graphics.html#nine-补丁。
我只是在寻找一个类似的答案——它可以通过Stroke和以下覆盖来完成:
@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
Paint strokePaint = new Paint();
strokePaint.setARGB(255, 0, 0, 0);
strokePaint.setTextAlign(Paint.Align.CENTER);
strokePaint.setTextSize(16);
strokePaint.setTypeface(Typeface.DEFAULT_BOLD);
strokePaint.setStyle(Paint.Style.STROKE);
strokePaint.setStrokeWidth(2);
Paint textPaint = new Paint();
textPaint.setARGB(255, 255, 255, 255);
textPaint.setTextAlign(Paint.Align.CENTER);
textPaint.setTextSize(16);
textPaint.setTypeface(Typeface.DEFAULT_BOLD);
canvas.drawText("Some Text", 100, 100, strokePaint);
canvas.drawText("Some Text", 100, 100, textPaint);
super.draw(canvas, mapView, shadow);
}
<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
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