自定义View

package com.zhy.customview02.view;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.Rect;
import android.text.TextPaint;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.util.Log;
import android.util.TypedValue;
import android.view.View;

import com.zhy.customview02.R;

public class CustomImageView extends View {
    private int mWidth;
    private int mHeight;
    private Bitmap mImage;
    private int mImageScale;
    private static final int IMAGE_SCALE_FITXY = 0;
    private static final int IMAGE_SCALE_CENTER = 1;

    private String mTitle;
    private int mTextColor;
    private int mTextSize;

    private Paint mPaint;
    private Rect mTextBound;
    private Rect rect;

    public CustomImageView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public CustomImageView(Context context) {
        this(context, null);
    }

    public CustomImageView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);

        TypedArray a = context.getTheme().obtainStyledAttributes(attrs,
                R.styleable.CustomImageView, defStyle, 0);

        int n = a.getIndexCount();

        for (int i = 0; i < n; i++) {
            int attr = a.getIndex(i);

            switch (attr) {
            case R.styleable.CustomImageView_image:
                mImage = BitmapFactory.decodeResource(getResources(),
                        a.getResourceId(attr, 0));
                break;
            case R.styleable.CustomImageView_imageScaleType:
                mImageScale = a.getInt(attr, 0);
                break;
            case R.styleable.CustomImageView_titleText:
                mTitle = a.getString(attr);
                break;
            case R.styleable.CustomImageView_titleTextColor:
                mTextColor = a.getColor(attr, Color.BLACK);
                break;
            case R.styleable.CustomImageView_titleTextSize:
                mTextSize = a.getDimensionPixelSize(attr, (int) TypedValue
                        .applyDimension(TypedValue.COMPLEX_UNIT_SP, 16,
                                getResources().getDisplayMetrics()));
                break;

            }
        }
        a.recycle();
        rect = new Rect();
        mPaint = new Paint();
        mTextBound = new Rect();
        mPaint.setTextSize(mTextSize);
        // 计算了描绘字体需要的范围
        mPaint.getTextBounds(mTitle, 0, mTitle.length(), mTextBound);

    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        // super.onMeasure(widthMeasureSpec,heightMeasureSpec);

        /**
         * 设置宽度
         */
        int specMode = MeasureSpec.getMode(widthMeasureSpec);
        int specSize = MeasureSpec.getSize(widthMeasureSpec);

        if (specMode == MeasureSpec.EXACTLY)// match_parent , accurate
        {
            Log.e("xxx", "EXACTLY");
            mWidth = specSize;
        } else {
            // 由图片决定的宽
            int desireByImg = getPaddingLeft() + getPaddingRight()
                    + mImage.getWidth();
            // 由字体决定的宽
            int desireByTitle = getPaddingLeft() + getPaddingRight()
                    + mTextBound.width();

            if (specMode == MeasureSpec.AT_MOST)// wrap_content
            {
                int desire = Math.max(desireByImg, desireByTitle);
                mWidth = Math.min(desire, specSize);
                Log.e("xxx", "AT_MOST");
            }
        }

        /***
         * 设置高度
         */

        specMode = MeasureSpec.getMode(heightMeasureSpec);
        specSize = MeasureSpec.getSize(heightMeasureSpec);
        if (specMode == MeasureSpec.EXACTLY)// match_parent , accurate
        {
            mHeight = specSize;
        } else {
            int desire = getPaddingTop() + getPaddingBottom()
                    + mImage.getHeight() + mTextBound.height();
            if (specMode == MeasureSpec.AT_MOST)// wrap_content
            {
                mHeight = Math.min(desire, specSize);
            }
        }
        setMeasuredDimension(mWidth, mHeight);
    }

    @Override
    protected void onDraw(Canvas canvas) {// super.onDraw(canvas);
        /**
         * 边框
         */
        mPaint.setStrokeWidth(4);
        mPaint.setStyle(Paint.Style.STROKE);
        mPaint.setColor(Color.CYAN);
        canvas.drawRect(0, 0, getMeasuredWidth(), getMeasuredHeight(), mPaint);

        rect.left = getPaddingLeft();
        rect.right = mWidth - getPaddingRight();
        rect.top = getPaddingTop();
        rect.bottom = mHeight - getPaddingBottom();

        mPaint.setColor(mTextColor);
        mPaint.setStyle(Style.FILL);
        /**
         * 当前设置的宽度小于字体需要的宽度，将字体改为xxx...
         */
        if (mTextBound.width() > mWidth) {
            TextPaint paint = new TextPaint(mPaint);
            String msg = TextUtils.ellipsize(mTitle, paint,
                    (float) mWidth - getPaddingLeft() - getPaddingRight(),
                    TextUtils.TruncateAt.END).toString();
            canvas.drawText(msg, getPaddingLeft(),
                    mHeight - getPaddingBottom(), mPaint);

        } else {
            // 正常情况，将字体居中
            canvas.drawText(mTitle, mWidth / 2 - mTextBound.width() * 1.0f / 2,
                    mHeight - getPaddingBottom(), mPaint);
        }

        // 取消使用掉的快
        rect.bottom -= mTextBound.height();

        if (mImageScale == IMAGE_SCALE_FITXY) {
            canvas.drawBitmap(mImage, null, rect, mPaint);
        } else {
            // 计算居中的矩形范围
            rect.left = mWidth / 2 - mImage.getWidth() / 2;
            rect.right = mWidth / 2 + mImage.getWidth() / 2;
            rect.top = (mHeight - mTextBound.height()) / 2 - mImage.getHeight()
                    / 2;
            rect.bottom = (mHeight - mTextBound.height()) / 2
                    + mImage.getHeight() / 2;

            canvas.drawBitmap(mImage, null, rect, mPaint);
        }

    }
}

attr.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <attr name="titleText" format="string" />
    <attr name="titleTextSize" format="dimension" />
    <attr name="titleTextColor" format="color" />
    <attr name="image" format="reference" />
    <attr name="imageScaleType">
        <enum name="fillXY" value="0" />
        <enum name="center" value="1" />
    </attr>

    <declare-styleable name="CustomImageView">
        <attr name="titleText" />
        <attr name="titleTextSize" />
        <attr name="titleTextColor" />
        <attr name="image" />
        <attr name="imageScaleType" />
    </declare-styleable>

</resources>

xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    xmlns:zhy="http://schemas.android.com/apk/res/com.zhy.customview02"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <com.zhy.customview02.view.CustomImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:padding="10dp"
        zhy:image="@drawable/ic_launcher"
        zhy:imageScaleType="center"
        zhy:titleText="脸 "
        zhy:titleTextColor="#ff0000"
        zhy:titleTextSize="30sp" />

</LinearLayout>