是否可以在Android TextView周围绘制边框?
当前回答
我通过扩展文本视图并手动绘制边框解决了这个问题。我甚至添加了这样的选项,您可以选择边框是虚线还是虚线。
public class BorderedTextView extends TextView {
private Paint paint = new Paint();
public static final int BORDER_TOP = 0x00000001;
public static final int BORDER_RIGHT = 0x00000002;
public static final int BORDER_BOTTOM = 0x00000004;
public static final int BORDER_LEFT = 0x00000008;
private Border[] borders;
public BorderedTextView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
public BorderedTextView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public BorderedTextView(Context context) {
super(context);
init();
}
private void init(){
paint.setStyle(Paint.Style.STROKE);
paint.setColor(Color.BLACK);
paint.setStrokeWidth(4);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if(borders == null) return;
for(Border border : borders){
paint.setColor(border.getColor());
paint.setStrokeWidth(border.getWidth());
if(border.getStyle() == BORDER_TOP){
canvas.drawLine(0, 0, getWidth(), 0, paint);
} else
if(border.getStyle() == BORDER_RIGHT){
canvas.drawLine(getWidth(), 0, getWidth(), getHeight(), paint);
} else
if(border.getStyle() == BORDER_BOTTOM){
canvas.drawLine(0, getHeight(), getWidth(), getHeight(), paint);
} else
if(border.getStyle() == BORDER_LEFT){
canvas.drawLine(0, 0, 0, getHeight(), paint);
}
}
}
public Border[] getBorders() {
return borders;
}
public void setBorders(Border[] borders) {
this.borders = borders;
}
}
边框类:
public class Border {
private int orientation;
private int width;
private int color = Color.BLACK;
private int style;
public int getWidth() {
return width;
}
public void setWidth(int width) {
this.width = width;
}
public int getColor() {
return color;
}
public void setColor(int color) {
this.color = color;
}
public int getStyle() {
return style;
}
public void setStyle(int style) {
this.style = style;
}
public int getOrientation() {
return orientation;
}
public void setOrientation(int orientation) {
this.orientation = orientation;
}
public Border(int Style) {
this.style = Style;
}
}
希望这对某人有所帮助:)
其他回答
检查下面的链接以制作圆角http://androidcookbook.com/Recipe.seam?recipeId=2318
Android项目中res下的可绘制文件夹不限于位图(PNG或JPG文件),但它也可以保存XML文件中定义的形状。
然后可以在项目中重用这些形状。形状可用于在布局周围放置边框。此示例显示了带有弯曲角的矩形边框。在可绘制文件夹中创建一个名为customerborder.xml的新文件(在Eclipse中,使用“文件”菜单并选择“新建”,然后选择“文件”,在文件名中键入可绘制文件夹并单击“完成”)。
输入定义边框形状的XML:
<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
<corners android:radius="20dp"/>
<padding android:left="10dp" android:right="10dp" android:top="10dp" android:bottom="10dp"/>
<solid android:color="#CCCCCC"/>
</shape>
属性android:shape设置为矩形(形状文件也支持椭圆、直线和环形)。矩形是默认值,因此如果它是正在定义的矩形,则可以忽略此属性。有关形状的Android文档,请参见http://developer.android.com/guide/topics/resources/drawable-resource.html#Shape有关形状文件的详细信息。
元素角点将矩形角点设置为圆角。可以在每个角落设置不同的半径(参见Android参考)。
填充属性用于移动应用形状的视图的内容,以防止内容与边境
此处的边框颜色设置为浅灰色(CCCCCC十六进制RGB值)。
形状也支持渐变,但这里没有使用渐变。再次,请参阅Android资源,了解如何定义渐变。使用android:background=“@drawbable/customborder”将形状应用于laypout。
在布局中,可以正常添加其他视图。在本例中,添加了一个TextView,文本为白色(FFFFFF十六进制RGB)。背景设置为蓝色,加上一些透明度以降低亮度(A00000FF十六进制alpha RGB值)。最后,通过将布局放置到另一个带有少量填充的布局中,将布局从屏幕边缘偏移。因此,完整布局文件为:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="5dp">
<LinearLayout android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/customborder">
<TextView android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="Text View"
android:textSize="20dp"
android:textColor="#FFFFFF"
android:gravity="center_horizontal"
android:background="#A00000FF" />
</LinearLayout>
</LinearLayout>
我通过扩展文本视图并手动绘制边框解决了这个问题。我甚至添加了这样的选项,您可以选择边框是虚线还是虚线。
public class BorderedTextView extends TextView {
private Paint paint = new Paint();
public static final int BORDER_TOP = 0x00000001;
public static final int BORDER_RIGHT = 0x00000002;
public static final int BORDER_BOTTOM = 0x00000004;
public static final int BORDER_LEFT = 0x00000008;
private Border[] borders;
public BorderedTextView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
public BorderedTextView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public BorderedTextView(Context context) {
super(context);
init();
}
private void init(){
paint.setStyle(Paint.Style.STROKE);
paint.setColor(Color.BLACK);
paint.setStrokeWidth(4);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if(borders == null) return;
for(Border border : borders){
paint.setColor(border.getColor());
paint.setStrokeWidth(border.getWidth());
if(border.getStyle() == BORDER_TOP){
canvas.drawLine(0, 0, getWidth(), 0, paint);
} else
if(border.getStyle() == BORDER_RIGHT){
canvas.drawLine(getWidth(), 0, getWidth(), getHeight(), paint);
} else
if(border.getStyle() == BORDER_BOTTOM){
canvas.drawLine(0, getHeight(), getWidth(), getHeight(), paint);
} else
if(border.getStyle() == BORDER_LEFT){
canvas.drawLine(0, 0, 0, getHeight(), paint);
}
}
}
public Border[] getBorders() {
return borders;
}
public void setBorders(Border[] borders) {
this.borders = borders;
}
}
边框类:
public class Border {
private int orientation;
private int width;
private int color = Color.BLACK;
private int style;
public int getWidth() {
return width;
}
public void setWidth(int width) {
this.width = width;
}
public int getColor() {
return color;
}
public void setColor(int color) {
this.color = color;
}
public int getStyle() {
return style;
}
public void setStyle(int style) {
this.style = style;
}
public int getOrientation() {
return orientation;
}
public void setOrientation(int orientation) {
this.orientation = orientation;
}
public Border(int Style) {
this.style = Style;
}
}
希望这对某人有所帮助:)
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);
}
事实上,这很简单。如果您想要在Textview后面有一个简单的黑色矩形,只需在Textview标记中添加android:background=“@android:color/black”即可。这样地:
<TextView
android:textSize="15pt" android:textColor="#ffa7ff04"
android:layout_alignBottom="@+id/webView1"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"
android:background="@android:color/black"/>
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
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