ImagePicker

 api 'com.cysion:ImagePicker:1.0.7'

 //若使用androidx，则需要这样添加依赖：
api 'com.cysion:ImagePicker:1.0.7.x'

api 'com.cysion:ImagePicker:1.0.7'

//若使用androidx，则需要这样添加依赖：
api 'com.cysion:ImagePicker:1.0.7.x'
---
//若出现Failed to resolve: com.github.chrisbanes:PhotoView的问题，
//则应在项目的build.gradle添加如下：
 maven{url"https://jitpack.io"}
---
//若出现依赖重复问题，可以这样;
api('com.cysion:ImagePicker:1.0.7'){
   exclude group: 'com.android.support'
}

public class PicassoImageLoader implements ImageLoader {

    @Override
    public void displayImage(Activity activity, String path, ImageView imageView, int width, int height) {
        Picasso.with(activity)//
                   .load(Uri.fromFile(new File(path)))//
                .placeholder(R.mipmap.default_image)//
                .error(R.mipmap.default_image)//
                .resize(width, height)//
                .centerInside()//
                .memoryPolicy(MemoryPolicy.NO_CACHE, MemoryPolicy.NO_STORE)//
                .into(imageView);
    }

    @Override
    public void clearMemoryCache() {
        //这里是清除缓存的方法,根据需要自己实现
    }
}

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_image_picker);
    
    ImagePicker imagePicker = ImagePicker.getInstance();
    imagePicker.setImageLoader(new PicassoImageLoader());   //设置图片加载器
    imagePicker.setShowCamera(true);  //显示拍照按钮
    imagePicker.setCrop(true);        //允许裁剪（单选才有效）
    imagePicker.setFreeCrop(true, FreeCropImageView.CropMode.FREE);//新版添加,自由裁剪，优先于setCrop
    imagePicker.setSaveRectangle(true); //是否按矩形区域保存
    imagePicker.setSelectLimit(9);    //选中数量限制
    imagePicker.setStyle(CropImageView.Style.RECTANGLE);  //裁剪框的形状
    imagePicker.setFocusWidth(800);   //裁剪框的宽度。单位像素（圆形自动取宽高最小值）
    imagePicker.setFocusHeight(800);  //裁剪框的高度。单位像素（圆形自动取宽高最小值）
    imagePicker.setOutPutX(1000);//保存文件的宽度。单位像素
    imagePicker.setOutPutY(1000);//保存文件的高度。单位像素
    imagePicker.setIToaster(this, new InnerToaster.IToaster());//设置吐司代理,保持lib与app中吐司风格一致
}

public void onClick(View v) {
        Intent intent = new Intent(this, ImageGridActivity.class);
        startActivityForResult(intent, IMAGE_PICKER);  
    }
}

//1.0.5版本加入了更明确的权限申请，解决原程序直接打开拍照可能出现没数据的情况

Intent intent = new Intent(this, ImageGridActivity.class);
intent.putExtra(ImageGridActivity.EXTRAS_TAKE_PICKERS,true); // 是否是直接打开相机
startActivityForResult(intent, REQUEST_CODE_SELECT);

//若拍照之后需要裁剪，则在使用前，需要关闭多选模式，支持裁剪

ImagePicker.getInstance().setMultiMode(false);
ImagePicker.getInstance().setFreeCrop(true, FreeCropImageView.CropMode.FREE);
...

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == ImagePicker.RESULT_CODE_ITEMS) {
        if (data != null && requestCode == IMAGE_PICKER) {
            ArrayList<ImageItem> images = (ArrayList<ImageItem>) data.getSerializableExtra(ImagePicker.EXTRA_RESULT_ITEMS);
            MyAdapter adapter = new MyAdapter(images);
            gridView.setAdapter(adapter);
        } else {
            Toast.makeText(this, "没有数据", Toast.LENGTH_SHORT).show();
        }
    }
}

 Copyright 2016 jeasonlzy(廖子尧)，2019 CysionLiu

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.