自定义View

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//布局

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.bwie.customview">    <application        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:supportsRtl="true"        android:theme="@style/AppTheme">        <activity android:name=".MainActivity">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>
package com.example.bwie.customview;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Rect;import android.util.AttributeSet;import android.view.View;import android.widget.LinearLayout;/** * Created by lenovo on 2017/11/5. */public class Custom extends View{    public Custom(Context context) {        super(context);    }    public Custom(Context context, AttributeSet attrs) {        super(context, attrs);    }    public Custom(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);    }    @Override    protected void onDraw(Canvas canvas) {        //自定义画笔        Paint paint= new Paint();        //画笔的大小        paint.setTextSize(10);        //画笔颜色        paint.setColor(Color.GREEN);        //画布        Rect rect=new Rect(0,0,70,50);        //将画布和画笔添加        canvas.drawRect(rect,paint);        //自定义画笔        Paint paint1= new Paint();        //画笔的大小        paint.setTextSize(10);        //画笔颜色        paint.setColor(Color.RED);        //画布        Rect rect1=new Rect(70,50,140,100);        //将画布和画笔添加        canvas.drawRect(rect1,paint1);        super.onDraw(canvas);    }}

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