相册选取照片并上传

孤街浪人~

于 2020-05-11 21:58:56 发布

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分类专栏： Android 文章标签： java

本文链接：https://blog.youkuaiyun.com/weixin_45942645/article/details/106063649

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本文详细介绍了一个在Android应用中实现从相册选择图片并上传至服务器的功能。文章首先展示了如何使用Intent打开相册选取图片，接着解释了如何处理7.0以上版本的文件Provider URI解析问题，最后给出了使用OkHttp进行图片上传的完整代码示例。

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  private static final int ALBUM_CODE = 200;
    private static final int CAMERA_CODE = 100;

开启相册并选择图片上传(注意权限处理):

private void openAlbum() {
        Intent intent = new Intent(Intent.ACTION_PICK);
        intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,"image/*");
        startActivityForResult(intent,ALBUM_CODE);
    }

意图回调获取图片

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == CAMERA_CODE) {
            //相机
            if (resultCode == RESULT_OK){
                try {
                    //Bitmap bitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(mImageUri));
                    uploadOk(mFile);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }else if (requestCode == ALBUM_CODE){
            //相册
            if (resultCode == RESULT_OK){
                Uri imageUri = data.getData();
                //处理uri,7.0以后的fileProvider 把URI 以content provider 方式 对外提供的解析方法
                File file = getFileFromUri(imageUri, this);

                if (file.exists()){
                    uploadOk(file);
                }
            }
        }
    }

7.0以后的fileProvider 把URI 以content provider 方式对外提供的解析方法

public File getFileFromUri(Uri uri, Context context) {
        if (uri == null) {
            return null;
        }
        switch (uri.getScheme()) {
            case "content":
                return getFileFromContentUri(uri, context);
            case "file":
                return new File(uri.getPath());
            default:
                return null;
        }
    }

    /**
    通过内容解析中查询uri中的文件路径
    */
    private File getFileFromContentUri(Uri contentUri, Context context) {
        if (contentUri == null) {
            return null;
        }
        File file = null;
        String filePath;
        String[] filePathColumn = {MediaStore.MediaColumns.DATA};
        ContentResolver contentResolver = context.getContentResolver();
        Cursor cursor = contentResolver.query(contentUri, filePathColumn, null,
                null, null);
        if (cursor != null) {
            cursor.moveToFirst();
            filePath = cursor.getString(cursor.getColumnIndex(filePathColumn[0]));
            cursor.close();

            if (!TextUtils.isEmpty(filePath)) {
                file = new File(filePath);
            }
        }
        return file;
    }

private void uploadOk(File file) {
        OkHttpClient okHttpClient = new OkHttpClient.Builder().build();

        RequestBody requestBody = RequestBody.create(MediaType.parse("image/jpg"), file);

        MultipartBody body = new MultipartBody.Builder()
                .setType(MultipartBody.FORM)
                .addFormDataPart("key", "1908A")
                .addFormDataPart("file", file.getName(), requestBody)
                .build();


        Request request = new Request.Builder()
                .url("http://yun918.cn/study/public/file_upload.php")
                .post(body)
                .build();

        okHttpClient.newCall(request).enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                Log.d(TAG, "onFailure: " + e.getMessage());
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String string = response.body().string();
                final UpLoadBean upLoadBean = new Gson().fromJson(string, UpLoadBean.class);
                final UpLoadBean.DataBean data = upLoadBean.getData();
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        Toast.makeText(MainActivity.this, upLoadBean.getRes(), Toast.LENGTH_SHORT).show();
                        Log.d(TAG, "run: " + upLoadBean.getRes());
                        Glide.with(MainActivity.this).load(data.getUrl()).into(mImage);

                    }
                });
            }
        });
    }