【绝对干货】仿微信QQ设置图形头像裁剪，让你的App从此炫起来~

最近在做毕业设计，想有一个功能和QQ一样可以裁剪头像并设置圆形头像，额，这是设计狮的一种潮流。

而纵观现在主流的APP，只要有用户系统这个功能，这个需求一般都是在（bu）劫（de）难(bu)逃(xue)！

图片裁剪实现方式有两种，一种是利用系统自带的裁剪工具，一种是使用开源工具Cropper。本节就为大家带来如何使用系统自带的裁剪工具进行图片裁剪~

还是先来个简单的运行图。（Ps,本人还没结婚，照片是我表哥~）

额，简单说下，我待会会把代码写成小demo分享给大家，在文章末尾会附上github链接，需要的可以自行下载~

下面来简单分析一下实现思路，我们首先照片肯定可以通过拍照和从相册选取，这个都可以向系统发送特定的Intent，响应对应的系统程序，然后在onActivityResult里面，获取我们的数据即可。而在onActivityResult里面，我们可以获取到两种形式的数据，Bitmap and uri。一般情况下我们是不会选择Bitmap的，因为大家都知道我们的手机里面的照片都太大了~强行使用bitmap，我只能说你，屌屌屌，sorry,我说的不是666，是傻屌的意思！

哈哈哈，让我爆粗口，我原本是拒绝的~只是希望警醒在看文章的你，那么就用uri吧~

那么然后呢？当然是对它做裁剪，完成后把这个裁剪后的bitmap对象设置给ImageView，保存起来，上传到服务器即可。

大致了解了流程，那么我们直接看代码吧~

先看看我们的圆形Image吧，我这个有点乱，因为考虑了很多我毕设的逻辑，所以做了一些修正，这个圆形Image相信网上会很多。

package com.example.nanchen.cropimagetest;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.ImageView;

/**
 * @author nanchen
 * @fileName CropImageTest
 * @packageName com.example.nanchen.cropimagetest
 * @date 2016/10/13  15:09
 */

public class RoundImageView extends ImageView {

    /**
     * 圆形ImageView，可设置最多两个宽度不同且颜色不同的圆形边框。
     *
     * @author Alan
     */

    private static class imageview_level {
        public final static int level0 = 0;
        public final static int level1 = 1;
        public final static int level2 = 2;
        public final static int level3 = 3;
        public final static int level4 = 4;
    }


    private Context mContext;
    private int circleColor = Color.WHITE;
    private int circleWidth = 0;
    private int mLevel = imageview_level.level1;

    public void setLevel(int level) {
        mLevel = level;
    }
    public RoundImageView(Context context) {
        super(context);
        mContext = context;
    }

    public RoundImageView(Context context, AttributeSet attrs) {
        super(context, attrs);
        mContext = context;
        setCustomAttributes(attrs);
    }

    public RoundImageView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        mContext = context;
        setCustomAttributes(attrs);
    }

    private void setCustomAttributes(AttributeSet attrs) {
        TypedArray a = mContext.obtainStyledAttributes(attrs, R.styleable.roundedimageview);
        int width = a.getDimensionPixelSize(R.styleable.roundedimageview_border_thickness, 0);
        setPadding(width, width, width, width);
        mLevel = a.getInt(R.styleable.roundedimageview_image_mode, imageview_level.level1);
        circleColor = a.getColor(R.styleable.roundedimageview_border_color, circleColor);
    }


    @Override
    public void setImageBitmap(Bitmap bm) {
        switch (this.mLevel) {
            case imageview_level.level1 :
                bm = RoundBitmap(bm);
            case imageview_level.level2 :
                if ((getPaddingLeft() == getPaddingRight()) && (getPaddingLeft() == getPaddingBottom())
                        && (getPaddingLeft() == getPaddingTop())) {
                    this.circleWidth = getPaddingLeft();
                    bm = RoundBitmap(bm);
                }
                break;
            case imageview_level.level3 :
                bm = ChamferBitmap(bm);
                break;
            case imageview_level.level4:
                if ((getPaddingLeft() == getPaddingRight()) && (getPaddingLeft() == getPaddingBottom())
                        && (getPaddingLeft() == getPaddingTop())) {
                    this.circleWidth = getPaddingLeft();
                    bm = RoundBitmap(bm);
                }
                break;
            default :
                break;
        }
        super.setImageBitmap(bm);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        switch (this.mLevel) {
            case imageview_level.level2:
                if (circleWidth > 0) {
                    drawCircleBorder(canvas, (getWidth() - this.circleWidth*2 + circleWidth) / 2, this.circleColor, getWidth(),
                            getHeight(), this.circleWidth);
                }
                break;
            case imageview_level.level4:
                if (circleWidth > 0){
                    int paddingwidth = circleWidth;

                    drawCircleBorder(canvas, (getWidth()-paddingwidth*2 +circleWidth /2) / 2, this.circleColor, getWidth(),
                            getHeight(), this.circleWidth /2,Color.DKGRAY);

                    int tempwidth = circleWidth /2;
                    drawCircleBorder(canvas, (getWidth()-paddingwidth*2 +tempwidth) / 2, this.circleColor, getWidth(),
                            getHeight(), tempwidth,Color.DKGRAY);

                }
                break;
            default:
                break;
        }
        super.onDraw(canvas);
    }

    /**
     * bitmap切成圆形
     *
     * @param bitmap 传入Bitmap对象
     * @return
     */
    private Bitmap RoundBitmap(Bitmap bitmap) {
        Bitmap resultBitmap = null;
        Canvas canvas = null;
        int width = bitmap.getWidth();
        int height = bitmap.getHeight();
        float roundPx;
        float left, top, right, bottom, dst_left, dst_top, dst_right, dst_bottom;
        if (width <= height) {
            roundPx = width / 2;
            top = 0;
            bottom = width;
            left = 0;
            right = width;
            height = width;
            dst_left = 0;
            dst_top = 0;
            dst_right = width;
            dst_bottom = width;
        } else {
            roundPx = height / 2;
            float clip = (width - height) / 2;
            left = clip;
            right = width - clip;
            top = 0;
            bottom = height;
            width = height;
            dst_left = 0;
            dst_top = 0;
            dst_right = height;
            dst_bottom = height;
        }
        if (width <= 0) {
            width = 1;
        }
        if (height <= 0) {
            height = 1;
        }

        try {
            resultBitmap = Bitmap.createBitmap(width, height, Config.ARGB_4444);
        } catch (Throwable e) {
            e.printStackTrace();
        }

        try {
            canvas = new Canvas(resultBitmap);
        } catch (Throwable e) {
            e.printStackTrace();
        }

        final int color = Color.RED;
        final Paint paint = new Paint();
        final Rect src = new Rect((int) left, (int) top, (int) right, (int) bottom);
        final Rect dst = new Rect((int) dst_left, (int) dst_top, (int) dst_right, (int) dst_bottom);
        final RectF rectF = new RectF(dst);
        paint.setAntiAlias(true);
        canvas.drawARGB(0, 0, 0, 0);
        // paint.setColor(color);
        canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
        canvas.drawBitmap(bitmap, src, dst, paint);
        return resultBitmap;
    }

    /**
     * bitmap倒角
     *
     * @param bitmap 传入Bitmap对象
     * @return
     */
    private Bitmap ChamferBitmap(Bitmap bitmap) {
        Bitmap resultBitmap = null;
        Canvas canvas = null;
        int width = bitmap.getWidth();
        int height = bitmap.getHeight();
        float roundPx;
        float left, top, right, bottom, dst_left, dst_top, dst_right, dst_bottom;
        if (width <= height) {
            roundPx = dip2px(this.mContext, 4); // 8像素倒角 4是dp值
            top = 0;
            bottom = width;
            left = 0;
            right = width;
            height = width;
            dst_left = 0;
            dst_top = 0;
            dst_right = width;
            dst_bottom = width;
        } else {
            roundPx = dip2px(this.mContext, 4); // 8像素倒角 4是dp值
            float clip = (width - height) / 2;
            left = clip;
            right = width - clip;
            top = 0;
            bottom = height;
            width = height;
            dst_left = 0;
            dst_top = 0;
            dst_right = height;
            dst_bottom = height;
        }
        if (width <= 0) {
            width = 1;
        }
        if (height <= 0) {
            height = 1;
        }

        try {
            resultBitmap = Bitmap.createBitmap(width, height, Config.ARGB_4444);
        } catch (Throwable e) {
            e.printStackTrace();
        }

        try {
            canvas = new Canvas(resultBitmap);
        } catch (Throwable e) {
            e.printStackTrace();
        }

        final int color = Color.RED;
        final Paint paint = new Paint();
        final Rect src = new Rect((int) left, (int) top, (int) right, (int) bottom);
        final Rect dst = new Rect((int) dst_left, (int) dst_top, (int) dst_right, (int) dst_bottom);
        final RectF rectF = new RectF(dst);
        paint.setAntiAlias(true);
        canvas.drawARGB(0, 0, 0, 0);
        // paint.setColor(color);
        canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
        canvas.drawBitmap(bitmap, src, dst, paint);
        return resultBitmap;
    }

    /**
     * 画布画圆
     */
    private void drawCircleBorder(Canvas canvas, int radius, int color, int width, int height, int circleWidth) {
        Paint paint = new Paint();
        /* 去锯齿 */
        paint.setAntiAlias(true);
        paint.setFilterBitmap(true);
        paint.setDither(true);
        paint.setColor(color);
        /* 设置paint的　style　为STROKE：空心 */
        paint.setStyle(Paint.Style.STROKE);
        /* 设置paint的外框宽度 */
        paint.setStrokeWidth(circleWidth);
        canvas.drawCircle(width / 2, height / 2, radius, paint);
    }

    private void drawCircleBorder(Canvas canvas, int radius, int color, int width, int height, int circleWidth,int shadowcolor){

        canvas.save();  //保存画布当前状态
        canvas.rotate(45,width / 2, height / 2);  //右下角45度阴影投射
        Paint paint = new Paint();
        paint.setColor(0x09ffffff & shadowcolor ); //设置alpha值
        for(int i=0;i<circleWidth*2;i++)  //向下角角偏移投射多少次阴影层
        {
            canvas.drawCircle(width/2+i, height / 2, radius+2, paint);
        }
        canvas.restore();

        paint = new Paint();
        /* 去锯齿 */
        paint.setAntiAlias(true);
        paint.setFilterBitmap(true);
        paint.setDither(true);
        paint.setColor(color);
        /* 设置paint的　style　为STROKE：空心 */
        paint.setStyle(Paint.Style.STROKE);
        /* 设置paint的外框宽度 */
        paint.setStrokeWidth(circleWidth); //二分之一实体
        canvas.drawCircle(width / 2, height / 2, radius, paint);
    }

    public void setCircleWidth(int padding) {
        setPadding(padding, padding, padding, padding);
    }

    public int getCircleColor() {
        return circleColor;
    }

    public void setCircleColor(int circleColor) {
        this.circleColor = circleColor;
    }

    // 执行完setImageBitmap后才能获得;
    public int getCircleWidth() {
        return this.circleWidth;
    }

    public OnTouchListener onTouchListener = new OnTouchListener() {
        @Override
        public boolean onTouch(View view, MotionEvent event) {
            switch (event.getAction()) {
                case MotionEvent.ACTION_UP:
                    changeLight((ImageView) view, 0);
                    // onclick
                    break;
                case MotionEvent.ACTION_DOWN:
                    changeLight((ImageView) view, -60);
                    break;
                case MotionEvent.ACTION_MOVE:
//                 changeLight((ImageView) view, 0);
                    break;
                case MotionEvent.ACTION_CANCEL:
                    changeLight((ImageView) view, 0);
                    break;
                default:
                    break;
            }
            return false;
        }
    };

    public void setColorFilter(boolean value){
        if(value){
            setOnTouchListener(onTouchListener);
        }else{
            setOnTouchListener(null);
        }
    }

    private void changeLight(ImageView imageview, int brightness) {
        ColorMatrix matrix = new ColorMatrix();
        matrix.set(new float[] { 1, 0, 0, 0, brightness, 0, 1, 0, 0, brightness, 0, 0, 1, 0, brightness, 0, 0, 0, 1, 0 });
        imageview.setColorFilter(new ColorMatrixColorFilter(matrix));
    }

    /**
     * 根据手机的分辨率从 dp 的单位 转成为 px(像素)
     */
    private int dip2px(Context context, float dpValue) {
        final float scale = context.getApplicationContext().getResources().getDisplayMetrics().density;
        return (int) (dpValue * scale + 0.5f);
    }


}

自定义一个仿IOS的弹出框

package com.example.nanchen.cropimagetest;

import android.app.Activity;
import android.app.Dialog;
import android.os.Bundle;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.view.Window;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;

import java.util.List;


/**
 * dialog
 * 
 */
public class SelectDialog extends Dialog implements OnClickListener,OnItemClickListener {
    private SelectDialogListener mListener;
    private Activity mActivity;
    private Button mMBtn_Cancel;
    private TextView mTv_Title;
    private List<String> mName;
    private String mTitle;
    private boolean mUseCustomColor = false;
    private int mFirstItemColor;
    private int mOtherItemColor;
    
    public interface SelectDialogListener {
        public void onItemClick(AdapterView<?> parent, View view, int position, long id);
    }

    
    private SelectDialogCancelListener mCancelListener;
    
    public interface SelectDialogCancelListener {
        public void onCancelClick(View v);
    }

    public SelectDialog(Activity activity, int theme,
            SelectDialogListener listener,List<String> names) {
        super(activity, theme);
        mActivity = activity;
        mListener = listener;
        this.mName=names;
        
        // 设置是否点击外围解散
        setCanceledOnTouchOutside(true);
    }
    
    /**
     * @param activity 调用弹出菜单的activity
     * @param theme 主题
     * @param listener 菜单项单击事件
     * @param cancelListener 取消事件
     * @param names 菜单项名称
     * 
     */
    public SelectDialog(Activity activity, int theme,SelectDialogListener listener,SelectDialogCancelListener cancelListener ,List<String> names) {
        super(activity, theme);
        mActivity = activity;
        mListener = listener;
        mCancelListener = cancelListener;
        this.mName=names;
        
        // 设置是否点击外围不解散
        setCanceledOnTouchOutside(false);
    }
    
    /**
     * @param activity 调用弹出菜单的activity
     * @param theme 主题
     * @param listener 菜单项单击事件
     * @param names 菜单项名称
     * @param title 菜单标题文字
     * 
     */
    public SelectDialog(Activity activity, int theme,SelectDialogListener listener,List<String> names,String title) {
        super(activity, theme);
        mActivity = activity;
        mListener = listener;
        this.mName=names;
        mTitle = title;
        
        // 设置是否点击外围可解散
        setCanceledOnTouchOutside(true);
    }

    public SelectDialog(Activity activity, int theme,SelectDialogListener listener,SelectDialogCancelListener cancelListener,List<String> names,String title) {
        super(activity, theme);
        mActivity = activity;
        mListener = listener;
        mCancelListener = cancelListener;
        this.mName=names;
        mTitle = title;
        
        // 设置是否点击外围可解散
        setCanceledOnTouchOutside(true);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        View view = getLayoutInflater().inflate(R.layout.view_dialog_select,
                null);
        setContentView(view, new LayoutParams(LayoutParams.FILL_PARENT,
                LayoutParams.WRAP_CONTENT));
        Window window = getWindow();
        // 设置显示动画
        window.setWindowAnimations(R.style.main_menu_animstyle);
        WindowManager.LayoutParams wl = window.getAttributes();
        wl.x = 0;
        wl.y = mActivity.getWindowManager().getDefaultDisplay().getHeight();
        // 以下这两句是为了保证按钮可以水平满屏
        wl.width = LayoutParams.MATCH_PARENT;
        wl.height = LayoutParams.WRAP_CONTENT;

        // 设置显示位置
        onWindowAttributesChanged(wl);
        
            //setCanceledOnTouchOutside(false);
        initViews();
    }

    private void initViews() {
        DialogAdapter dialogAdapter=new DialogAdapter(mName);
        ListView dialogList=(ListView) findViewById(R.id.dialog_list);
        dialogList.setOnItemClickListener(this);
        dialogList.setAdapter(dialogAdapter);
        mMBtn_Cancel = (Button) findViewById(R.id.mBtn_Cancel);
        mTv_Title = (TextView) findViewById(R.id.mTv_Title);
        
            //mMBtn_Cancel.setOnClickListener(this);

        mMBtn_Cancel.setOnClickListener(new View.OnClickListener() {
            
            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                if(mCancelListener != null){
                    mCancelListener.onCancelClick(v);    
                }
                dismiss();
            }
        });
        
        if(!TextUtils.isEmpty(mTitle) && mTv_Title != null){
            mTv_Title.setVisibility(View.VISIBLE);
            mTv_Title.setText(mTitle);
        }else{
            mTv_Title.setVisibility(View.GONE);
        }
    }

    @Override
    public void onClick(View v) {
        dismiss();

    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
            long id) {
        
        mListener.onItemClick(parent, view, position, id);
        dismiss();
    }
    private class DialogAdapter extends BaseAdapter {
        private List<String> mStrings;
        private Viewholder viewholder;
        private LayoutInflater layoutInflater;
        public DialogAdapter(List<String> strings) {
            this.mStrings = strings;
            this.layoutInflater=mActivity.getLayoutInflater();
        }

        @Override
        public int getCount() {
            // TODO Auto-generated method stub
            return mStrings.size();
        }

        @Override
        public Object getItem(int position) {
            // TODO Auto-generated method stub
            return mStrings.get(position);
        }

        @Override
        public long getItemId(int position) {
            // TODO Auto-generated method stub
            return position;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            if (null == convertView) {
                viewholder=new Viewholder();
                convertView=layoutInflater.inflate(R.layout.view_dialog_item, null);
                viewholder.dialogItemButton=(TextView) convertView.findViewById(R.id.dialog_item_bt);
                convertView.setTag(viewholder);
            }else{
                viewholder=(Viewholder) convertView.getTag();
            }
            viewholder.dialogItemButton.setText(mStrings.get(position));
            if (!mUseCustomColor) {
                mFirstItemColor = mActivity.getResources().getColor(R.color.dialog_blue);
                mOtherItemColor = mActivity.getResources().getColor(R.color.dialog_blue);
            }
            if (1 == mStrings.size()) {
                viewholder.dialogItemButton.setTextColor(mFirstItemColor);
                viewholder.dialogItemButton.setBackgroundResource(R.drawable.dialog_item_bg_only);
            } else if (position == 0) {
                viewholder.dialogItemButton.setTextColor(mFirstItemColor);
                viewholder.dialogItemButton.setBackgroundResource(R.drawable.dialog_item_bg_top);
            } else if (position == mStrings.size() - 1) {
                viewholder.dialogItemButton.setTextColor(mOtherItemColor);
                viewholder.dialogItemButton.setBackgroundResource(R.drawable.dialog_item_bg_buttom);
            } else {
                viewholder.dialogItemButton.setTextColor(mOtherItemColor);
                viewholder.dialogItemButton.setBackgroundResource(R.drawable.dialog_item_bg_center);
            }
            return convertView;
        }

    }

    public static class Viewholder {
        public TextView dialogItemButton;
    }

    /**
     * 设置列表项的文本颜色
     */
    public void setItemColor(int firstItemColor, int otherItemColor) {
        mFirstItemColor = firstItemColor;
        mOtherItemColor = otherItemColor;
        mUseCustomColor = true;
    }
    
}

由于图片文件一定在相册中，有可能你也会在文件系统中其他地方选择，这里我采用之前写的万能适配器！

由于楼主时间的确比较紧，所以代码都是直接copy上来的，有些地方没做完全优化还望大家见谅！

再看看Activity的代码和布局

package com.example.nanchen.cropimagetest;

import android.content.ComponentName;
import android.content.DialogInterface;
import android.content.DialogInterface.OnCancelListener;
import android.content.Intent;
import android.content.pm.ResolveInfo;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.provider.MediaStore.Images.Media;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AlertDialog.Builder;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;

import com.example.nanchen.cropimagetest.SelectDialog.SelectDialogListener;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private RoundImageView mHeadImage;

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

        mHeadImage = (RoundImageView) findViewById(R.id.main_roundImage);
    }

    private final int PHOTO_PICKED_FROM_CAMERA = 1; // 用来标识头像来自系统拍照
    private final int PHOTO_PICKED_FROM_FILE = 2; // 用来标识从相册获取头像
    private final int CROP_FROM_CAMERA = 3;

    private void getIconFromPhoto(){
        Intent intent = new Intent(Intent.ACTION_GET_CONTENT, Media.EXTERNAL_CONTENT_URI);
        intent.setType("image/*");
        startActivityForResult(intent, PHOTO_PICKED_FROM_FILE);
    }

    private void selectPhoto() {
        List<String> list = new ArrayList<>();
        list.add("拍照");
        list.add("相册");
        showDialog(new SelectDialogListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                switch (position){
                    case 0:
                        getIconFromCamera();
                        break;
                    case 1:
                        getIconFromPhoto(); // 从系统相册获取
                        break;
                    default:
                        break;
                }
            }
        },list);

    }

    private Uri imgUri; // 由于android手机的图片基本都会很大，所以建议用Uri，而不用Bitmap

    /**
     * 调用系统相机拍照
     */
    private void getIconFromCamera() {
        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        imgUri = Uri.fromFile(new File(Environment.getExternalStorageDirectory(),
                "avatar_"+String.valueOf(System.currentTimeMillis())+".png"));
        intent.putExtra(MediaStore.EXTRA_OUTPUT,imgUri);
        startActivityForResult(intent,PHOTO_PICKED_FROM_CAMERA);
    }

    private SelectDialog showDialog(SelectDialogListener listener, List<String> list){
        SelectDialog dialog = new SelectDialog(this,
                R.style.transparentFrameWindowStyle,listener,list);
            dialog.show();
        return dialog;
    }


    /**
     * 尝试裁剪图片
     */
    private void doCrop(){
        final ArrayList<CropOption> cropOptions = new ArrayList<>();
        final Intent intent = new Intent("com.android.camera.action.CROP");
        intent.setType("image/*");
        List<ResolveInfo> list = getPackageManager().queryIntentActivities(intent,0);
        int size = list.size();
        if (size == 0){
            UIUtil.showToast(this,"当前不支持裁剪图片!");
            return;
        }
        intent.setData(imgUri);
        intent.putExtra("outputX",300);
        intent.putExtra("outputY",300);
        intent.putExtra("aspectX",1);
        intent.putExtra("aspectY",1);
        intent.putExtra("scale",true);
        intent.putExtra("return-data",true);

        // only one
        if (size == 1){
            Intent intent1 = new Intent(intent);
            ResolveInfo res = list.get(0);
            intent1.setComponent(new ComponentName(res.activityInfo.packageName,res.activityInfo.name));
            startActivityForResult(intent1,CROP_FROM_CAMERA);
        }else {
            // 很多可支持裁剪的app
            for (ResolveInfo res : list) {
                CropOption co = new CropOption();
                co.title = getPackageManager().getApplicationLabel(res.activityInfo.applicationInfo);
                co.icon = getPackageManager().getApplicationIcon(res.activityInfo.applicationInfo);
                co.appIntent = new Intent(intent);
                co.appIntent.setComponent(new ComponentName(res.activityInfo.packageName,res.activityInfo.name));
                cropOptions.add(co);
            }

            CommonAdapter<CropOption> adapter = new CommonAdapter<CropOption>(this,cropOptions,R.layout.layout_crop_selector) {
                @Override
                public void convert(ViewHolder holder, CropOption item) {
                    holder.setImageDrawable(R.id.iv_icon,item.icon);
                    holder.setText(R.id.tv_name,item.title);
                }
            };

            AlertDialog.Builder builder = new Builder(this);
            builder.setTitle("choose a app");
            builder.setAdapter(adapter, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    startActivityForResult(cropOptions.get(which).appIntent,CROP_FROM_CAMERA);
                }
            });
            builder.setOnCancelListener(new OnCancelListener() {
                @Override
                public void onCancel(DialogInterface dialog) {
                    if (imgUri != null){
                        getContentResolver().delete(imgUri,null,null);
                        imgUri = null;
                    }
                }
            });
            AlertDialog dialog = builder.create();
            dialog.show();

        }
    }


    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode != RESULT_OK){
            return;
        }
        switch (requestCode) {
            case PHOTO_PICKED_FROM_CAMERA:
                doCrop();
                break;
            case PHOTO_PICKED_FROM_FILE:
                imgUri = data.getData();
                doCrop();
                break;
            case CROP_FROM_CAMERA:
                if (data != null){
                    setCropImg(data);
                }
                break;
            default:
                break;
        }
    }

    private void setCropImg(Intent picData){
        Bundle bundle = picData.getExtras();
        if (bundle != null){
            Bitmap mBitmap = bundle.getParcelable("data");
            mHeadImage.setImageBitmap(mBitmap);
            saveBitmap(Environment.getExternalStorageDirectory() + "/crop_"
                    +System.currentTimeMillis() + ".png",mBitmap);
        }
    }

    private void saveBitmap(String fileName,Bitmap bitmap){
        File file = new File(fileName);
        FileOutputStream fout = null;
        try {
            file.createNewFile();
            fout = new FileOutputStream(file);
            bitmap.compress(CompressFormat.PNG,100,fout);
            fout.flush();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (fout!=null){
                    fout.close();
                }
                UIUtil.showToast(MainActivity.this,"保存成功！");
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    public void btnClick(View view) {
        selectPhoto();
    }
}

布局：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.nanchen.cropimagetest.MainActivity">


    <com.example.nanchen.cropimagetest.RoundImageView
        android:id="@+id/main_roundImage"
        android:layout_width="100dp"
        android:layout_height="100dp"
        android:layout_alignParentTop="true"
        android:layout_centerInParent="true"
        android:src="@drawable/default_avatar"/>

    <Button
        android:id="@+id/main_btn"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/main_roundImage"
        android:onClick="btnClick"
        android:text="设置头像"/>
</RelativeLayout>

最后，再次对大家表示歉意，代码有些地方讲解不是很到位，后面我把毕设完全做出来后也会开源给大家，供大家一起交流使用，请持续关注~

 github链接:https://github.com/nanchen2251/CropImageDemo