即拿即用-选择头像，可以选择相册，拍照，查看大图，保存到本地

如图所示：

• 显示图片用的是Glide

• 选择图片用的是GalleryFinal

• 查看大图用的是PhotView

• 圆形图片用的是SelectableRoundedImageView

GitHub地址：https://github.com/mocn26169/Avatar

核心代码：

点击选择图片

  @Override    public void onClick(View v) {        switch (v.getId()) {            case R.id.avatar:                if (!TextUtils.isEmpty(url)) {                    new ActionSheetDialog(GalleryFinalActivity.this)                            .builder()                            .setCancelable(true)                            .setCanceledOnTouchOutside(true)                            .addSheetItem("相册", SheetItemColor.Blue,                                    new OnSheetItemClickListener() {                                        @Override                                        public void onClick(int which) {                                            // GalleryFinal.openGallerySingle(REQUEST_CODE_GALLERY, mOnHanlderResultCallback);                                            //带配置                                            functionConfig = new FunctionConfig.Builder()                                                    .setEnableCamera(false)                                                    .setEnableEdit(false)                                                    .setEnableCrop(true)                                                    .setEnableRotate(true)                                                    .setCropSquare(true)                                                    .setEnablePreview(true)                                                    .build();                                            GalleryFinal.openGallerySingle(REQUEST_CODE_GALLERY, functionConfig, mOnHanlderResultCallback);                                        }                                    })                            .addSheetItem("拍照", SheetItemColor.Blue,                                    new OnSheetItemClickListener() {                                        @Override                                        public void onClick(int which) {                                            GalleryFinal.openCamera(REQUEST_CODE_CAMERA, mOnHanlderResultCallback);                                        }                                    }                            )                            .addSheetItem("查看大图", SheetItemColor.Blue,                                    new OnSheetItemClickListener() {                                        @Override                                        public void onClick(int which) {                                            Intent intent = new Intent(GalleryFinalActivity.this, BrowsePictureActivity.class);                                            intent.putExtra("url", url);                                            startActivity(intent);                                        }                                    }                            )                            .show();                } else {                    new ActionSheetDialog(GalleryFinalActivity.this)                            .builder()                            .setCancelable(true)                            .setCanceledOnTouchOutside(true)                            .addSheetItem("相册", SheetItemColor.Blue,                                    new OnSheetItemClickListener() {                                        @Override                                        public void onClick(int which) {                                        }                                    })                            .addSheetItem("拍照", SheetItemColor.Blue,                                    new OnSheetItemClickListener() {                                        @Override                                        public void onClick(int which) {                                            GalleryFinal.openCamera(REQUEST_CODE_CAMERA, mOnHanlderResultCallback);                                        }                                    }                            )                            .show();                }                break;            default:                break;        }    }

回调成功显示图片

   private GalleryFinal.OnHanlderResultCallback mOnHanlderResultCallback = new GalleryFinal.OnHanlderResultCallback() {        @Override        public void onHanlderSuccess(int reqeustCode, List<PhotoInfo> resultList) {            if (resultList != null && resultList.size() > 0) {                url = resultList.get(0).getPhotoPath();                Log.e("MainActivity", "url=" + url);                Glide                        .with(GalleryFinalActivity.this)                        .load("file://" + url)                        .asBitmap()//                        .load("https://ss0.baidu.com/73t1bjeh1BF3odCf/it/u=2561733620,2304282159&fm=85&s=E71450848ABEFCCE643AA8800300308C")//                        .centerCrop()                        .placeholder(R.mipmap.default_placeholder)//                        .crossFade()                        .into(avatar);            }        }        @Override        public void onHanlderFailure(int requestCode, String errorMsg) {            Toast.makeText(GalleryFinalActivity.this, errorMsg, Toast.LENGTH_SHORT).show();        }    };}

保存图片到本地

  view.setOnLongClickListener(new View.OnLongClickListener() {                @Override                public boolean onLongClick(View v) {                    new ActionSheetDialog(BrowsePictureActivity.this)                            .builder()                            .setCancelable(true)                            .setCanceledOnTouchOutside(true)                            .addSheetItem("保存到手机", SheetItemColor.Blue,                                    new OnSheetItemClickListener() {                                        @Override                                        public void onClick(int which) {                                            onDownLoad(url);                                        }                                    })                            .show();                    return true;                }            });

/**     * 启动图片下载线程     */    private void onDownLoad(String url) {        ProgressUtils.show(BrowsePictureActivity.this, null, "正在保存，请耐心等候......");        DownLoadImageService service = new DownLoadImageService(getApplicationContext(),                url,                new ImageDownLoadCallBack() {                    @Override                    public void onDownLoadSuccess(File file, String url) {                    }                    @Override                    public void onDownLoadSuccess(Bitmap bitmap, String url) {                        // 在这里执行图片保存方法                        Message message = new Message();                        message.what = MSG_VISIBLE;                        message.obj = url;                        downLoadHandler.sendMessage(message);                    }                    @Override                    public void onDownLoadFailed() {                        // 图片保存失败                        Message message = new Message();                        message.what = MSG_ERROR;                        downLoadHandler.sendMessage(message);                    }                });        //启动图片下载线程        new Thread(service).start();    }

package com.bourne.avatar;import android.content.Context;import android.content.Intent;import android.graphics.Bitmap;import android.net.Uri;import android.os.Environment;import com.bumptech.glide.Glide;import com.bumptech.glide.request.target.Target;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;/** * 图片下载 */public class DownLoadImageService implements Runnable {    private String url;    private Context context;    private ImageDownLoadCallBack callBack;    private File currentFile;    public DownLoadImageService(Context context, String url, ImageDownLoadCallBack callBack) {        this.url = url;        this.callBack = callBack;        this.context = context;    }    @Override    public void run() {        File file = null;        Bitmap bitmap = null;        String savePicturePosition = "";        try {//            file = Glide.with(context)//                    .load(url)//                    .downloadOnly(Target.SIZE_ORIGINAL, Target.SIZE_ORIGINAL)//                    .get();            bitmap = Glide.with(context)                    .load(url)                    .asBitmap()                    .into(Target.SIZE_ORIGINAL, Target.SIZE_ORIGINAL)                    .get();            if (bitmap != null) {                // 在这里执行图片保存方法                savePicturePosition = saveImageToGallery(context, bitmap);            }        } catch (Exception e) {            e.printStackTrace();        } finally {//            if (file != null) {//                callBack.onDownLoadSuccess(file);//            } else {//                callBack.onDownLoadFailed();//            }            if (bitmap != null && currentFile.exists()) {                callBack.onDownLoadSuccess(bitmap, savePicturePosition);            } else {                callBack.onDownLoadFailed();            }        }    }    public String saveImageToGallery(Context context, Bitmap bmp) {        String savePicturePosition = null;        // 首先保存图片        File file = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES).getAbsoluteFile();//注意小米手机必须这样获得public绝对路径        String dirName = "Avatar";        File appDir = new File(file, dirName);        if (!appDir.exists()) {            appDir.mkdirs();        }        String fileName = System.currentTimeMillis() + ".jpg";        currentFile = new File(appDir, fileName);        savePicturePosition = currentFile.getAbsolutePath();        FileOutputStream fos = null;        try {            fos = new FileOutputStream(currentFile);            bmp.compress(Bitmap.CompressFormat.JPEG, 100, fos);            fos.flush();        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        } finally {            try {                if (fos != null) {                    fos.close();                }            } catch (IOException e) {                e.printStackTrace();            }        }        // 其次把文件插入到系统图库//        try {//            MediaStore.Images.Media.insertImage(context.getContentResolver(),//                    currentFile.getAbsolutePath(), fileName, null);//        } catch (FileNotFoundException e) {//            e.printStackTrace();//        }        // 最后通知图库更新        context.sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE,                Uri.fromFile(new File(currentFile.getPath()))));        return savePicturePosition;    }}

package com.bourne.avatar;import android.graphics.Bitmap;import java.io.File;public interface ImageDownLoadCallBack {    void onDownLoadSuccess(File file,String url);    void onDownLoadSuccess(Bitmap bitmap,String url);    void onDownLoadFailed();}

一个避免内存泄露的Handler，具体可见《 Android内存优化方案和内存泄露检测分析方法》

private static class DownLoadHandler extends Handler {        private WeakReference<BrowsePictureActivity> activityWeakReference;        public DownLoadHandler(BrowsePictureActivity activity) {            this.activityWeakReference = new WeakReference<BrowsePictureActivity>(activity);        }        @Override        public void handleMessage(Message msg) {            ProgressUtils.dissmiss();            BrowsePictureActivity activity = activityWeakReference.get();            if (activity != null) {                if (msg.what == MSG_VISIBLE) {                    new AlertDialog(activity).builder()                            .setMsg("图片保存成功，路径为" + msg.obj)                            .setNegativeButton("确定", new View.OnClickListener() {                                @Override                                public void onClick(View v) {                                }                            }).show();//                    Toast.makeText(activity, "文件已保存在" + msg.obj, Toast.LENGTH_LONG).show();                } else if (msg.what == MSG_ERROR) {                    new AlertDialog(activity).builder()                            .setMsg("图片保存失败" + msg.obj)                            .setNegativeButton("确定", new View.OnClickListener() {                                @Override                                public void onClick(View v) {                                }                            }).show();//                    Toast.makeText(activity, "文件保存失败", Toast.LENGTH_LONG).show();                }            }        }    }    @Override    protected void onDestroy() {        super.onDestroy();        downLoadHandler.removeCallbacksAndMessages(null);    }

参考

• https://github.com/pengjianbo/GalleryFinal GalleryFinal

• https://github.com/bumptech/glide Glide

• https://github.com/chrisbanes/PhotoView PhotView

• https://github.com/pungrue26/SelectableRoundedImageView SelectableRoundedImageView