Android ShapeDrawable之OvalShape、RectShape、PaintDrawable、ArcShape

叁歲伎倆 2023-10-17 08:05 7阅读 0赞

**Android ShapeDrawable之OvalShape、RectShape、PaintDrawable、ArcShape**

Android图形图像基础之OvalShape、RectShape、PaintDrawable、ArcShape。写一个例子说明。

准备一个布局，布局里面竖直方向排列若干TextView：

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
    
        <TextView
            android:id="@+id/textView1"
            android:layout_width="wrap_content"
            android:layout_height="100dp"
            android:layout_margin="10dp"
            android:gravity="center"
            android:padding="10dp"
            android:text="OvalShape"
            android:textColor="@android:color/white" />
    
        <TextView
            android:id="@+id/textView2"
            android:layout_width="wrap_content"
            android:layout_height="100dp"
            android:layout_margin="10dp"
            android:gravity="center"
            android:padding="10dp"
            android:text="RectShape"
            android:textColor="@android:color/white" />
    
        <TextView
            android:id="@+id/textView3"
            android:layout_width="wrap_content"
            android:layout_height="100dp"
            android:layout_margin="10dp"
            android:gravity="center"
            android:padding="10dp"
            android:text="PaintDrawable"
            android:textColor="@android:color/white" />
    
        <TextView
            android:id="@+id/textView4"
            android:layout_width="wrap_content"
            android:layout_height="100dp"
            android:layout_margin="10dp"
            android:gravity="center"
            android:padding="10dp"
            android:text="ArcDrawable"
            android:textColor="@android:color/white" />
    
    </LinearLayout>

上层Java代码把OvalShape、RectShape、PaintDrawable、ArcShape分别作为背景Drawable：

package zhangphil.app;
    
    import android.graphics.Color;
    import android.graphics.Paint;
    import android.graphics.drawable.PaintDrawable;
    import android.graphics.drawable.ShapeDrawable;
    import android.graphics.drawable.shapes.ArcShape;
    import android.graphics.drawable.shapes.OvalShape;
    import android.graphics.drawable.shapes.RectShape;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    
    public class MainActivity extends AppCompatActivity {
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
    
            //椭圆形形状
            OvalShape ovalShape = new OvalShape();
            ShapeDrawable drawable1 = new ShapeDrawable(ovalShape);
            drawable1.getPaint().setColor(Color.BLUE);
            drawable1.getPaint().setStyle(Paint.Style.FILL);
            findViewById(R.id.textView1).setBackgroundDrawable(drawable1);
    
            //矩形形状
            RectShape rectShape = new RectShape();
            ShapeDrawable drawable2 = new ShapeDrawable(rectShape);
            drawable2.getPaint().setColor(Color.RED);
            drawable2.getPaint().setStyle(Paint.Style.FILL);
            findViewById(R.id.textView2).setBackgroundDrawable(drawable2);
    
            //一个继承自ShapeDrawable更为通用、可以直接使用的形状
            PaintDrawable drawable3 = new PaintDrawable(Color.GREEN);
            drawable3.setCornerRadius(30);
            findViewById(R.id.textView3).setBackgroundDrawable(drawable3);
    
            //扇形、扇面形状
            //顺时针,开始角度30， 扫描的弧度跨度180
            ArcShape arcShape = new ArcShape(30, 180);
            ShapeDrawable drawable4 = new ShapeDrawable(arcShape);
            drawable4.getPaint().setColor(Color.YELLOW);
            drawable4.getPaint().setStyle(Paint.Style.FILL);
            findViewById(R.id.textView4).setBackgroundDrawable(drawable4);
        }
    }

运行结果：

![Center][]

[Center]: https://img-blog.csdn.net/20160725164731140?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center