我们如何创建如下的气球可绘制形状。我们可以动态地改变它的颜色。
答案 0 :(得分:55)
XML
和triangle
为rectangle
。将它保存在drawable文件夹中。
<强> triangle.xml 强>
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item >
<rotate
android:fromDegrees="45"
android:toDegrees="45"
android:pivotX="-40%"
android:pivotY="87%" >
<shape
android:shape="rectangle" >
<stroke android:color="@android:color/transparent" android:width="10dp"/>
<solid
android:color="#000000" />
</shape>
</rotate>
</item>
</layer-list>
<强> rectangle.xml 强>
<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
<item>
<shape android:shape="rectangle">
<solid android:color="#B2E3FA" />
</shape>
</item>
</layer-list>
您需要的形状的和布局。
<RelativeLayout
android:id="@+id/rlv1"
android:layout_width="150dp"
android:layout_height="50dp"
android:background="@drawable/rectangle" />
<RelativeLayout
android:id="@+id/rlv2"
android:layout_width="50dp"
android:layout_height="50dp"
android:layout_below="@+id/rlv1"
android:background="@drawable/triangle"
android:rotation="180" />
根据您的要求设置保证金。
答案 1 :(得分:17)
如果您想要布局的边框
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/linear_root"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
>
<TextView
android:id="@+id/text_message"
android:layout_width="100dp"
android:layout_height="wrap_content"
android:background="@drawable/bg_rectangle"
android:layout_marginLeft="20dp"
android:layout_marginRight="20dp"
android:layout_marginTop="20dp"
android:padding="8dp"
android:text="Abc"
/>
<ImageView
android:id="@+id/image_arrow"
android:layout_marginTop="-1.5dp"
android:layout_width="16dp"
android:layout_height="16dp"
android:layout_gravity="center_horizontal"
android:background="@drawable/icon_arrow_down"
/>
</LinearLayout>
<强> bg_rectangle 强>
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<solid android:color="#eaeaea" />
<stroke
android:width="1dp"
android:color="#f00" />
<corners android:radius="8dp" />
</shape>
icon_arrow_down ,或者您可以按照here
等矢量创建三角形<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<rotate
android:fromDegrees="45"
android:pivotX="135%"
android:pivotY="15%"
android:toDegrees="45"
>
<shape android:shape="rectangle">
<solid android:color="#eaeaea"/>
<stroke
android:width="1dp"
android:color="#f00" />
</shape>
</rotate>
</item>
</layer-list>
答案 2 :(得分:5)
在保持动态的同时,干净正确的方法是扩展View类。
然后在onDraw中你会做这样的事情:
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
drawBackground(canvas);
}
private void drawBackground(Canvas canvas) {
int width = (int) mWidth;
int height = (int) mHeight;
Point a = new Point(0, 0);
Point b = new Point(width, 0);
Point c = new Point(width, height - mPointHeight);//mPointedHeight is the length of the triangle... in this case we have it dynamic and can be changed.
Point d = new Point((width/2)+(mPointedHeight/2), height - mPointHeight);
Point e = new Point((width/2), height);// this is the sharp point of the triangle
Point f = new Point((width/2)-(mPointedHeight/2), height - mPointHeight);
Point g = new Point(0, height - mPointHeight);
Path path = new Path();
path.moveTo(a.x, a.y);
path.lineTo(b.x, b.y);
path.lineTo(c.x, c.y);
path.lineTo(d.x, d.y);
path.lineTo(e.x, e.y);
path.lineTo(f.x, f.y);
path.lineTo(g.x, g.y);
canvas.drawPath(path, mPointedBackgroundPaint);// mPointedBackgroundPaint is whatever color you want as the fill.
}
你去,没有不必要的分层或代码,不是动态的或干净的。您也可以在框中添加文本。
答案 3 :(得分:1)
使用三角形图像和矩形图像,并以上述格式对其进行数学对齐。使用颜色过滤动态更改其颜色。
您甚至可以使用矢量图形,使用自定义颜色在自定义视图上绘制它们,这将是解决此问题的另一种方法。
答案 4 :(得分:1)
创建自定义视图并使用画布绘制traingle
package com.example.dickbutt;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.util.AttributeSet;
import android.view.View;
public class TriangleShapeView extends View {
public int colorCode = Color.MAGENTA;
public int getColorCode() {
return colorCode;
}
public void setColorCode(int colorCode) {
this.colorCode = colorCode;
}
public TriangleShapeView(Context context) {
super(context);
}
public TriangleShapeView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public TriangleShapeView(Context context, AttributeSet attrs) {
super(context, attrs);
}
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
int w = getWidth() / 2;
int h = getHeight() / 2;
Path path = new Path();
path.moveTo(0, 0);
path.lineTo(w, 2 * h);
path.lineTo(2 * w, 0);
path.lineTo(0, 0);
path.close();
Paint p = new Paint();
p.setColor(colorCode);
p.setAntiAlias(true);
canvas.drawPath(path, p);
}
}
<强>结果强>
<强>用法强>
<TextView
android:id="@+id/progress_value"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:background="@android:color/holo_purple"
android:gravity="center_horizontal"
android:text="200,0000000"
android:textColor="#fff" />
<com.example.dickbutt.TriangleShapeView
android:id="@+id/textView1"
android:layout_width="10dp"
android:layout_height="20dp"
android:layout_below="@+id/progress_value"
android:layout_centerHorizontal="true"
android:background="@drawable/rectangle"
android:gravity="center_horizontal"
android:textSize="10sp" />
<强>优点强>
答案 5 :(得分:0)
答案 6 :(得分:0)
首先,您可以在xml
文件夹
drawable
xml
将负责矩形形状的边框颜色
您可以使用以下代码
创建此类边框形状<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
<item>
<shape android:shape="rectangle">
<solid android:color="#B2E3FA" />
</shape>
</item>
<item android:left="5dp" android:bottom="5dp" android:top="5dp" >
<shape android:shape="rectangle">
<solid android:color="#D8D8D8" />
</shape>
</item>
</layer-list>
这将为矩形形状创建一个必需的边框,你需要像这样用这个drawable分配那个矩形形状的背景
android:background="@drawable/bg"
其中bg
是已保存在可绘制文件夹
之后,您需要将三角形正好放在矩形对象的下方。
我希望你理解我的逻辑