Android开发之头像智能裁剪

本篇主要是记录头像智能裁剪，如果图片含有人头像就智能提取头像，没有就按照默认scaleType裁剪。

圆角头像采用 circleimageview 开源库

compile ‘de.hdodenhof:circleimageview:2.1.0’

网络图片加载这里采用 Glide

compile ‘com.github.bumptech.glide:glide:3.7.0’

人脸识别抠图辅助类 FaceHelper

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.PointF;
import android.media.FaceDetector;
import android.util.Log;

import de.hdodenhof.circleimageview.CircleImageView;

public final class FaceHelper {

    public static void clipFacePhotoBitmap(final Activity activity, final CircleImageView circleImageView, final Bitmap bitmap){

        new Thread(new Runnable() {
            @Override
            public void run() {
                Log.e("time","face clip time start:"+System.currentTimeMillis()+"****");
                Bitmap faceBitmap = genFaceBitmap(bitmap);
                if(faceBitmap==null){
                    faceBitmap = bitmap;
                }
                final Bitmap finalFaceBitmap = faceBitmap;
                activity.runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        circleImageView.setImageBitmap(finalFaceBitmap);
                        Log.e("time","face clip time end: "+System.currentTimeMillis()+"****");
                    }
                });
            }
        }).start();
    }
    public static Bitmap genFaceBitmap(Bitmap sourceBitmap) {

        if (!checkBitmap(sourceBitmap)) {
            return null;
        }

        Bitmap cacheBitmap = sourceBitmap.copy(Bitmap.Config.RGB_565, false);

        sourceBitmap = null;

        int cacheWidth = cacheBitmap.getWidth();
        int cacheHeight = cacheBitmap.getHeight();
        if (cacheWidth % 2 != 0) {
            if (0 == cacheWidth - 1) {
                return null;
            }
            final Bitmap localCacheBitmap = Bitmap.createBitmap(cacheBitmap, 0,
                    0, cacheWidth - 1, cacheHeight);
            cacheBitmap.recycle();
            cacheBitmap = localCacheBitmap;
            --cacheWidth;
        }

        final FaceDetector.Face[] faces = new FaceDetector.Face[1];
        final int facefound = new FaceDetector(cacheWidth, cacheHeight, 1)
                .findFaces(cacheBitmap, faces);
        if (0 == facefound) {
            return null;
        }

        final PointF p = new PointF();
        faces[0].getMidPoint(p);

        final int faceX = (int) p.x;
        final int faceY = (int) p.y;

        int startX, startY, width, height;
        if (faceX <= cacheWidth - faceX) {
            startX = 0;
            width = faceX * 2;
        } else {
            startX = faceX - (cacheWidth - faceX);
            width = (cacheWidth - faceX) * 2;
        }
        if (faceY <= cacheHeight - faceY) {
            startY = 0;
            height = faceY * 2;
        } else {
            startY = faceY - (cacheHeight - faceY);
            height = (cacheHeight - faceY) * 2;
        }

        final Bitmap result = Bitmap.createBitmap(cacheBitmap, startX, startY,
                width, height);
        cacheBitmap.recycle();
        return result;
    }

    private static boolean checkBitmap(final Bitmap bitmap) {
        if (null == bitmap || bitmap.isRecycled()) {
            return false;
        }
        if (0 == bitmap.getWidth() || 0 == bitmap.getHeight()) {
            return false;
        }
        return true;
    }
}

测试demo xml文件

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:background="#1a87be"
        >

        <de.hdodenhof.circleimageview.CircleImageView
            android:id="@+id/circleImageView"
            android:layout_width="80dp"
            android:layout_centerInParent="true"
            android:layout_height="80dp"
            android:src="@drawable/icon_cateye_default_photo"
            app:civ_border_color="#55C4FC"
            app:civ_border_width="2dp" />
    RelativeLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:orientation="horizontal"
        android:layout_height="200dp">

        <ImageView
            android:id="@+id/normal"
            android:layout_width="0dp"
            android:layout_height="match_parent"
            android:layout_margin="20dp"
            android:layout_weight="1"
            android:src="@drawable/url_normal" />

        <ImageView
            android:id="@+id/photo"
            android:layout_width="0dp"
            android:src="@drawable/url_photo"
            android:layout_height="match_parent"
            android:layout_margin="20dp"
            android:layout_weight="1"/>
    LinearLayout>

LinearLayout>

测试代码 MainActivity.class

import android.graphics.Bitmap;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;

import com.bumptech.glide.Glide;
import com.bumptech.glide.request.animation.GlideAnimation;
import com.bumptech.glide.request.target.SimpleTarget;

import de.hdodenhof.circleimageview.CircleImageView;

public class MainActivity extends AppCompatActivity {

    public static final String URL_NORMAL = "http://tgi12.jia.com/119/917/19917355.jpg";

    public static final String URL_PHOTO = "https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1524534441&di=c4bf6ab9e77c9ceda8283f43d188f04e&imgtype=jpg&er=1&src=http%3A%2F%2Fimg.pconline.com.cn%2Fimages%2Fupload%2Fupc%2Ftx%2Fitbbs%2F1603%2F03%2Fc40%2F18838489_1457005978542_mthumb.jpg";

    private CircleImageView circleImageView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        circleImageView = (CircleImageView)findViewById(R.id.circleImageView);

        findViewById(R.id.normal).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Glide.with(getApplicationContext()).load(URL_NORMAL).asBitmap().into(new SimpleTarget() {
                    @Override
                    public void onResourceReady(Bitmap resource, GlideAnimationsuper Bitmap> glideAnimation) {
                        FaceHelper.clipFacePhotoBitmap(MainActivity.this,circleImageView,resource);
                    }
                });
            }
        });

        findViewById(R.id.photo).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Glide.with(getApplicationContext()).load(URL_PHOTO).asBitmap().into(new SimpleTarget() {
                    @Override
                    public void onResourceReady(Bitmap resource, GlideAnimationsuper Bitmap> glideAnimation) {
                        FaceHelper.clipFacePhotoBitmap(MainActivity.this,circleImageView,resource);
                    }
                });
            }
        });
    }
}

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亲门，这次真没有demo了，以上为全部代码了！