android 上传头像遇到的问题,Android 7.0 图片剪切问题，选择头像上传

古城微笑少年丶 2022-10-05 07:56 267阅读 0赞

一、 7.0文件地址传输的问题

异常信息：FileUriExposedException：

android:name="android.support.v4.content.FileProvider"android:authorities="应用报名.fileProvider"android:exported="false"android:grantUriPermissions="true">android:name="android.support.FILE\_PROVIDER\_PATHS"android:resource="@xml/file\_paths"/>

在res.下的xml文件:

文件名是：file\_paths(和清单文件中一致)

xml version="1.0"encoding="utf-8"?>xmlns:android="http://schemas.android.com/apk/res/android">name="files\_root"path="Android/data/com.lechuang.letaotao/"/>name="external\_storage\_root"path="."/>

在 传输过程中提供图片地址：

public staticUri getUriForFile(Context context,File file) \{

if(context == null|| file == null) \{

throw newNullPointerException();\}

Uri uri;if(Build.VERSION.SDK\_INT>= 24) \{

uri = FileProvider.getUriForFile(context,"应用包名.fileProvider",file);\} else\{

uri = Uri.fromFile(file);\}

returnuri;\}

打开照相机：

//android 7.0// Uri imageUri = FileProvider.getUriForFile(mContext, "应用包名.fileProvider", file);

// 7.0 以

// Uri uri = Uri.fromFile(file);

//适配7.0和7.0一下的地址Uri imageUri =

getUriForFile(

mContext

file)

;Intent intent =

newIntent()

;intent.addFlags(Intent.

FLAG\_GRANT\_READ\_URI\_PERMISSION)

;intent.setAction(MediaStore.

ACTION\_IMAGE\_CAPTURE)

;intent.putExtra(MediaStore.

EXTRA\_OUTPUT

,imageUri)

; //把拍照后的图片放在指定的文件intent.putExtra(MediaStore.

EXTRA\_VIDEO\_QUALITY

;startActivityForResult(intent

;

相册选择：

Intent intent = newIntent(Intent.ACTION\_PICK,MediaStore.Images.Media.EXTERNAL\_CONTENT\_URI);intent.setDataAndType(MediaStore.Images.Media.EXTERNAL\_CONTENT\_URI,"image/\*"); //\*代表全部startActivityForResult(intent,1);

裁剪图片：

public static voidresizeImage(Uri uri,Activity activity, intrequestCode) \{

Intent intent = newIntent("com.android.camera.action.CROP");intent.setDataAndType(uri,"image/png"); //限定图片类型intent.addFlags(Intent.FLAG\_GRANT\_READ\_URI\_PERMISSION); //重要 ，权限要求。intent.putExtra("crop","true");

// aspectX , aspectY :宽高的比例intent.putExtra("aspectX",1);intent.putExtra("aspectY",1);

// outputX , outputY : 裁剪图片宽高intent.putExtra("outputX",150);intent.putExtra("outputY",150);intent.putExtra("return-data", true);activity.startActivityForResult(intent,requestCode);\}

压缩图片：

private voidshowResizeImage(Intent data) \{

Bundle extras = data.getExtras();if(extras != null) \{

Bitmap bitmap = extras.getParcelable("data");String path = Uri.fromFile(file).getPath();bitmap =toSmall(bitmap,path);

压缩处理的具体方法：

public staticBitmap toSmall(Bitmap bitmap,String path) \{

intscale = 1;intwidth\_tmp = bitmap.getWidth();intheight\_tmp = bitmap.getHeight();while(true) \{

if(width\_tmp / 2< 100|| height\_tmp / 2< 100)

break;width\_tmp /= 2;height\_tmp /= 2;scale \*= 2;\}

Matrix matrix = newMatrix();matrix.postScale(scale,scale);// 长和宽放大缩小的比例bitmap = Bitmap.createBitmap(bitmap,0,0,bitmap.getWidth(),bitmap.getHeight(),matrix, true);try\{

FileOutputStream fileOutputStream = newFileOutputStream(path);try\{

bitmap.compress(Bitmap.CompressFormat.PNG,100,fileOutputStream);\} finally\{

try\{

fileOutputStream.flush();fileOutputStream.close();\} catch(IOException e) \{

\} catch(FileNotFoundException e) \{

e.printStackTrace();\}

returnbitmap;\}

主界面的处理：

@Overridepublic voidonActivityResult(intrequestCode, intresultCode,Intent data) \{

switch(requestCode) \{

case1:

if(resultCode != -1) \{

return;\}

.resizeImage(data.getData(), this,3); //处理从相册返回的信息：break;case2:

if(resultCode != -1) \{

return;\}

if(PhotoUtil.isSdcardExisting()) \{ //处理从照相机返回的图片

Uri uriForFile = getUriForFile(mContext,file);resizeImage(uriForFile, this,3); //开始裁剪\} else\{

Utils.show(mContext,"未找到存储卡，无法存储照片");\}

break;case3:

if(data != null) \{

showResizeImage(data); // 压缩图片\}

break;default:

break;\}

super.onActivityResult(requestCode,resultCode,data);\}

附 Android6.0 文件和照相机权限申请：

private static final intREQUEST\_PERMISSION\_CAMERA= 222;private static final intREQUEST\_PERMISSION\_STORAGE= 333;private voidsetCamear() \{

if(Build.VERSION.SDK\_INT>= Build.VERSION\_CODES.M) \{

intcheckCallPhonePermission = ContextCompat.checkSelfPermission(mContext,Manifest.permission.CAMERA);if(checkCallPhonePermission != PackageManager.PERMISSION\_GRANTED) \{

ActivityCompat.requestPermissions(this, newString\[\]\{Manifest.permission.CAMERA\},REQUEST\_PERMISSION\_CAMERA);return;\}

if(Build.VERSION.SDK\_INT>= Build.VERSION\_CODES.M) \{

intcheckCallPhonePermission = ContextCompat.checkSelfPermission(mContext,Manifest.permission.WRITE\_EXTERNAL\_STORAGE);if(checkCallPhonePermission != PackageManager.PERMISSION\_GRANTED) \{

ActivityCompat.requestPermissions(this, newString\[\]\{Manifest.permission.WRITE\_EXTERNAL\_STORAGE\},REQUEST\_PERMISSION\_STORAGE);return;\}

@Overridepublic voidonRequestPermissionsResult(intrequestCode,String\[\] permissions, int\[\] grantResults) \{

switch(requestCode) \{

//就像onActivityResult一样这个地方就是判断你是从哪来的。caseREQUEST\_PERMISSION\_CAMERA:

if(grantResults\[0\] == PackageManager.PERMISSION\_GRANTED) \{

\} else\{Utils.show(mContext,"很遗憾你把相机权限禁用了!");finish();\}

break;caseREQUEST\_PERMISSION\_STORAGE:

if(grantResults\[0\] == PackageManager.PERMISSION\_GRANTED) \{

\} else\{

// Permission DeniedUtils.show(mContext,"很遗憾你把读取文件权限禁用了!");finish();\}

break;default:

super.onRequestPermissionsResult(requestCode,permissions,grantResults);\}