本篇内容介绍了“Android怎样实现上传图片功能”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！
本文实例为大家分享了Android实现上传图片功能的具体代码，供大家参考，具体内容如下
设定拍照返回的图片路径
/**
* 设定拍照返回的图片路径
* @param image 图片路径
* @param i 约定值
*/
protected void image(String image, int i) {
//创建file对象，用于存储拍照后的图片，这也是拍照成功后的照片路径
outputImage = new File(getExternalCacheDir(),image);
try {
//判断文件是否存在，存在删除，不存在创建
if (outputImage.exists()){
outputImage.delete();
}
outputImage.createNewFile();
} catch (IOException e) {
e.printStackTrace();
}
//相机拍照返回图片路径
Uri photoUri;
//判断当前Android版本
if(Build.VERSION.SDK_INT>=24){
photoUri = FileProvider.getUriForFile(TextActivity.this,"包名.FileProvider",outputImage);
}else {
photoUri = Uri.fromFile(outputImage);
}
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT, photoUri);
startActivityForResult(intent, i);
}
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调用系统相机拍照接受返回的图片路径
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
if (requestCode == IMAGE_Y) {
getImageView(binding.imageY,"0");
}
if (requestCode == IMAGE_Q) {
getImageView(binding.imageQ,"1");
}
}
}
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上传图片
/**
* 上传图片
* @param view 图片展示 view
*/
protected void getImageView(@NotNull ImageView view, String type) {
Bitmap photo = BitmapFactory.decodeFile(outputImage.getAbsolutePath());
view.setImageBitmap(photo);
int direction = 0;
try {
ExifInterface exif = new ExifInterface(String.valueOf(outputImage));
direction = Integer.parseInt(exif.getAttribute(ExifInterface.TAG_ORIENTATION));
} catch (IOException e) {
e.printStackTrace();
}
Matrix matrix = new Matrix();
Uri uri = Uri.fromFile(outputImage);
String f = uri.getPath();
Bitmap b = rotateBitmap(getBitmapFromUrl(f,900,1200),0);
switch (direction) {
case 1:
Log.d("图片方向","顶部，左侧（水平/正常）");
b = rotateBitmap(getBitmapFromUrl(f,900,1200),0);
break;
case 2:
b = rotateBitmap(getBitmapFromUrl(f,900,1200),0);
Log.d("图片方向","顶部，右侧（水平镜像）");
break;
case 3:
b = rotateBitmap(getBitmapFromUrl(f,900,1200),180);
Log.d("图片方向","底部，右侧（旋转180）");
break;
case 4:
matrix.postScale(1, -1);
b = Bitmap.createBitmap(b,0,0,900,1200,matrix,true);
Log.d("图片方向","底部，左侧（垂直镜像）");
break;
case 5:
matrix.postScale(-1, 1);
b = rotateBitmap(getBitmapFromUrl(f,900,1200),270);
b = Bitmap.createBitmap(b,0,0,900,1200,matrix,true);
Log.d("图片方向","左侧，顶部（水平镜像并顺时针旋转270）");
break;
case 6:
b = rotateBitmap(getBitmapFromUrl(f,900,1200),90);
Log.d("图片方向","右侧，顶部（顺时针旋转90）");
break;
case 7:
matrix.postScale(-1, 1);
b = rotateBitmap(getBitmapFromUrl(f,900,1200),90);
b = Bitmap.createBitmap(b,0,0,900,1200,matrix,true);
Log.d("图片方向","右侧，底部（水平镜像，顺时针旋转90度）");
break;
case 8:
b = rotateBitmap(getBitmapFromUrl(f,900,1200),270);
Log.d("图片方向","左侧，底部（顺时针旋转270）");
break;
default:
break;
}
try {
File files = new File(new URI(uri.toString()));
saveBitmap(b,files);
} catch (URISyntaxException e) {
e.printStackTrace();
}
try {
String file = uploadImage(networkApi.getFormal() + "setImage", uri.getPath(), code, userId);
TextBase.FileInfo fileInfo = new TextBase.FileInfo();
fileInfo.setFilePath(file);
mFileInfos.add(fileInfo);
model.load(file,type);
} catch (IOException | JSONException e) {
e.printStackTrace();
}
}
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/**
* 上传图片
* @param url 上传接口路径
* @param imagePath 图片路径
* @param code 唯一标识
* @return 服务器图片的路径
* @throws IOException
* @throws JSONException
*/
public static String uploadImage(String url, String imagePath, String code, String userId) throws IOException, JSONException {
OkHttpClient okHttpClient = new OkHttpClient();
Log.d("imagePath", imagePath);
File file = new File(imagePath);
RequestBody image = RequestBody.create(MediaType.parse("image/jpg"), file);
RequestBody requestBody = new MultipartBody.Builder()
.setType(MultipartBody.FORM)
.addFormDataPart("file", imagePath, image)
.addFormDataPart("fileOid", code)
.addFormDataPart("userId", userId)
.build();
Request request = new Request.Builder()
.url(url)
.addHeader("Authorization",令牌)
.post(requestBody)
.build();
Response response = okHttpClient.newCall(request).execute();
JSONObject jsonObject = new JSONObject(response.body().string());
return jsonObject.optString("msg");
}
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其他工具类
/**
* 压缩图片的方法
* @param url
* @param width
* @param height
* @return
*/
public static Bitmap getBitmapFromUrl(String url, double width, double height) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true; // 设置了此属性一定要记得将值设置为false
Bitmap bitmap = BitmapFactory.decodeFile(url);
// 防止OOM发生
options.inJustDecodeBounds = false;
int mWidth = bitmap.getWidth();
int mHeight = bitmap.getHeight();
Matrix matrix = new Matrix();
float scaleWidth = 1;
float scaleHeight = 1;
// 按照固定宽高进行缩放
if(mWidth <= mHeight) {
scaleWidth = (float) (width/mWidth);
scaleHeight = (float) (height/mHeight);
} else {
scaleWidth = (float) (height/mWidth);
scaleHeight = (float) (width/mHeight);
}
// 按照固定大小对图片进行缩放
matrix.postScale(scaleWidth, scaleHeight);
Bitmap newBitmap = Bitmap.createBitmap(bitmap, 0, 0, mWidth, mHeight, matrix, true);
// 用完了记得回收
bitmap.recycle();
return newBitmap;
}
/**
* Android保存Bitmap到文件
* @param bitmap
* @param file
* @return
*/
public static boolean saveBitmap(Bitmap bitmap, File file) {
if (bitmap == null)
return false;
FileOutputStream fos = null;
try {
fos = new FileOutputStream(file);
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
fos.flush();
return true;
} catch (Exception e) {
e.printStackTrace();
} finally {
if (fos != null) {
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return false;
}
/**
* 旋转图片
* @param bitmap 图片
* @param rotate 角度
* @return
*/
public static Bitmap rotateBitmap(Bitmap bitmap, int rotate) {
if (bitmap == null)
return null;
int w = bitmap.getWidth();
int h = bitmap.getHeight();
Matrix mtx = new Matrix();
mtx.postRotate(rotate);
return Bitmap.createBitmap(bitmap, 0, 0, w, h, mtx, true);
}
“Android怎样实现上传图片功能”的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识可以关注亿速云网站，小编将为大家输出更多高质量的实用文章！
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