Android长按图片保存到本地并且更新图库

实现效果:
Android长按图片保存到本地并且更新图库_第1张图片

实现过程:
首先定义以下数组:

//长按后显示的 Item
final String[] items = new String[] { "保存图片"};
//图片转成Bitmap数组
final Bitmap[] bitmap = new Bitmap[1];

图片转Bitmap数组代码:

Glide.with(context).load(url).asBitmap().into(new SimpleTarget() {
                    @Override
                    public void onResourceReady(Bitmap resource, GlideAnimation glideAnimation) {
                        bitmap[0] = resource;
                    }
                });

给view设置长按监听事件:

icon.setOnLongClickListener(new View.OnLongClickListener() {
                    @Override
                    public boolean onLongClick(View view) {
                        //弹出的“保存图片”的Dialog
                        AlertDialog.Builder builder = new AlertDialog.Builder(context);
                        builder.setItems(items, new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                switch (which){
                                    case 0:
                                        if(bitmap[0] !=null){
                                            saveImageToGallery(context, bitmap[0]);
                                        }else {
                                            ToastUtils.showShort(context,"bitmap为空");
                                        }
                                }
                            }
                        });
                        builder.show();
                        return true;
                    }

保存图片的方法:

public static void saveImageToGallery(Context context, Bitmap bmp) {
        // 首先保存图片 创建文件夹
        File appDir = new File(Environment.getExternalStorageDirectory(), "shy");
        if (!appDir.exists()) {
            appDir.mkdir();
        }
        //图片文件名称
        String fileName = "shy_"+System.currentTimeMillis() + ".jpg";
        File file = new File(appDir, fileName);
        try {
            FileOutputStream fos = new FileOutputStream(file);
            bmp.compress(Bitmap.CompressFormat.JPEG, 100, fos);
            fos.flush();
            fos.close();
        } catch (Exception e) {
            Log.e("111",e.getMessage());
            e.printStackTrace();
        }

        // 其次把文件插入到系统图库
        String path = file.getAbsolutePath();
        try {
            MediaStore.Images.Media.insertImage(context.getContentResolver(), path, fileName, null);
        } catch (FileNotFoundException e) {
            Log.e("333",e.getMessage());
            e.printStackTrace();
        }
        // 最后通知图库更新
        Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
        Uri uri = Uri.fromFile(file);
        intent.setData(uri);
        context.sendBroadcast(intent);
        ToastUtils.showShort(context,"保存成功");
    }

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