<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:paddingBottom="@dimen/activity_vertical_margin"

    android:paddingLeft="@dimen/activity_horizontal_margin"

    android:paddingRight="@dimen/activity_horizontal_margin"

    android:paddingTop="@dimen/activity_vertical_margin"

    tools:context=".MainActivity" >

    <com.example.bitmap1.MyView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content">

	</com.example.bitmap1.MyView>

</RelativeLayout>

主程序

package com.example.bitmap1;

import android.os.Bundle;

import android.app.Activity;

public class MainActivity extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

    }

}

MyView中定义的bitmap

package com.example.bitmap1;

import android.content.Context;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

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 {

	public MyView(Context context, AttributeSet attrs) {

		super(context, attrs);

		// TODO Auto-generated constructor stub

	}

	@Override

	protected void onDraw(Canvas canvas) {

		// TODO Auto-generated method stub

//		获取图片文件

		Bitmap bitmap = BitmapFactory.decodeResource(super.getResources(),

				R.drawable.a4);

//		设置背景画布颜色

		canvas.drawColor(Color.WHITE);

//		初始化画笔

		Paint paint=new Paint();

//		设置边缘羽化

		paint.setAntiAlias(true);

//		绘制图片

		canvas.drawBitmap(bitmap, 0, 0,paint );

//		设置画笔颜色

		paint.setColor(Color.BLUE);

//		设置字体尺寸

		paint.setTextSize(20);

//		绘制文字

		canvas.drawText("我的头像", 10, bitmap.getHeight()+20, paint);

	}

}