自定义组件

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这里写图片描述

<resources>    <declare-styleable name="myView">        <attr name="textSize" format="dimension"/>        <attr name="textColor" format="color"/>        <attr name="text" format="string"/>    </declare-styleable></resources>

自定义组件在这里使用：

<LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:myandroid="http://schemas.android.com/apk/res/com.ybj.lesson"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    android:gravity="center">        <Button             android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="列表"            android:id="@+id/bt_list"/>        <com.ybj.lesson.MyView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            myandroid:textSize="30sp"            myandroid:textColor="#00ff00">        </com.ybj.lesson.MyView></LinearLayout>

自定义组件控制类：

package com.ybj.lesson;import com.ybj.lesson.R;import android.content.Context;import android.content.res.TypedArray;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.util.AttributeSet;import android.view.View;public class MyView extends View {    private Paint paint = null;;    public MyView(Context context, AttributeSet attrs) {        super(context, attrs);        // TODO Auto-generated constructor stub        //取出属性文件        TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.myView);        //取出属性        float textSize = array.getDimension(R.styleable.myView_textSize, 25);        int textColor = array.getColor(R.styleable.myView_textColor, Color.BLUE);        String text = array.getString(R.styleable.myView_text);        paint = new Paint();        paint.setColor(textColor);        paint.setTextSize(textSize);        //关闭资源        array.recycle();    }    @Override    protected void onDraw(Canvas canvas) {        // TODO Auto-generated method stub        super.onDraw(canvas);        //绘制组件内容        canvas.drawText("aaaa", 10, 30, paint);        canvas.drawCircle(10, 20, 6, paint);    }}

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