Android ShapeDrawable之OvalShape、RectShape、PaintDrawable、ArcShape

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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：

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