android 快速实现 图片获取并裁剪（更换头像）

1.获取图片框架：https://github.com/LuckSiege/PictureSelector

2.图片裁剪框架：https://github.com/jdamcd/android-crop

3.Glide图片加载框架：https://github.com/bumptech/glide

2.build.gradle依赖：

dependencies {
  // PictureSelector basic (Necessary)
  implementation 'io.github.lucksiege:pictureselector:v3.11.2'

  // image compress library (Not necessary)
  implementation 'io.github.lucksiege:compress:v3.11.2'

  // uCrop library (Not necessary)(图片裁剪框架，不支持横屏)
  //implementation 'io.github.lucksiege:ucrop:v3.11.2'

  //android-crop 图片裁剪框架，支持横屏
  implementation 'com.soundcloud.android:android-crop:1.0.1@aar'

  // simple camerax library (Not necessary)
  implementation 'io.github.lucksiege:camerax:v3.11.2'

    //Glide
    implementation 'com.github.bumptech.glide:glide:4.16.0'
    annotationProcessor 'com.github.bumptech.glide:compiler:4.16.0'
}

2.Activity 设置：

    /**
     * 获取本地图片或拍照
     * @param ivBigCover
     */
    private void pickerImage(ImageView ivBigCover) {
        PictureSelector.create(this)
                .openGallery(SelectMimeType.ofImage())
                .setImageEngine(new GlideEngine())
                .setMaxSelectNum(1)
                .setCropEngine(new CropFileEngine() {
                    @Override
                    public void onStartCrop(Fragment fragment, Uri srcUri, Uri destinationUri, ArrayList<String> dataSource, int requestCode) {
                        //android-crop图片裁剪
                        Crop.of(srcUri, destinationUri)
                                .asSquare()
                                .start(fragment.getContext(), fragment, requestCode);
                    }
                })
                .forResult(new OnResultCallbackListener<LocalMedia>() {
                    @Override
                    public void onResult(ArrayList<LocalMedia> result) {
                        Log.i(TAG, "onResult=" + result);
                        if (result != null && result.get(0).getCutPath() != null) {
                            ivBigCover.setImageURI(Uri.parse(result.get(0).getCutPath()));
                            Log.i(TAG, "onResult=" + result.get(0).getCutPath());
                        }
                    }

                    @Override
                    public void onCancel() {
                        Log.i(TAG, "onCancel=");
                    }
                });
    }

3.GlideEngine:

package com.example.mygtest;

import android.content.Context;
import android.widget.ImageView;

import com.bumptech.glide.Glide;
import com.luck.picture.lib.engine.ImageEngine;
import com.luck.picture.lib.utils.ActivityCompatHelper;

/**
 * @author：luck
 * @date：2019-11-13 17:02
 * @describe：Glide加载引擎
 */
public class GlideEngine implements ImageEngine {

    /**
     * 加载图片
     *
     * @param context   上下文
     * @param url       资源url
     * @param imageView 图片承载控件
     */
    @Override
    public void loadImage(Context context, String url, ImageView imageView) {
        if (!ActivityCompatHelper.assertValidRequest(context)) {
            return;
        }
        Glide.with(context)
                .load(url)
                .into(imageView);
    }

    @Override
    public void loadImage(Context context, ImageView imageView, String url, int maxWidth, int maxHeight) {
        if (!ActivityCompatHelper.assertValidRequest(context)) {
            return;
        }
        Glide.with(context)
                .load(url)
                //.override(maxWidth, maxHeight)
                .into(imageView);
    }

    /**
     * 加载相册目录封面
     *
     * @param context   上下文
     * @param url       图片路径
     * @param imageView 承载图片ImageView
     */
    @Override
    public void loadAlbumCover(Context context, String url, ImageView imageView) {
        if (!ActivityCompatHelper.assertValidRequest(context)) {
            return;
        }
        Glide.with(context)
                .asBitmap()
                .load(url)
                //.override(180, 180)
                //.sizeMultiplier(0.5f)
                //.transform(new CenterCrop(), new RoundedCorners(8))
                //.placeholder(R.mipmap.ic_launcher)
                .into(imageView);
    }


    /**
     * 加载图片列表图片
     *
     * @param context   上下文
     * @param url       图片路径
     * @param imageView 承载图片ImageView
     */
    @Override
    public void loadGridImage(Context context, String url, ImageView imageView) {
        if (!ActivityCompatHelper.assertValidRequest(context)) {
            return;
        }
        Glide.with(context)
                .load(url)
//                .override(200, 200)
//                .centerCrop()
//                .placeholder(R.mipmap.ic_launcher)
                .into(imageView);
    }

    @Override
    public void pauseRequests(Context context) {
        if (!ActivityCompatHelper.assertValidRequest(context)) {
            return;
        }
        Glide.with(context).pauseRequests();
    }

    @Override
    public void resumeRequests(Context context) {
        if (!ActivityCompatHelper.assertValidRequest(context)) {
            return;
        }
        Glide.with(context).resumeRequests();
    }

    private static final class InstanceHolder {
        static final GlideEngine instance = new GlideEngine();
    }

    public static GlideEngine createGlideEngine() {
        return InstanceHolder.instance;
    }
}