android 7.0 因为file://引起的FileUriExposedException异常

 private void dialog() {
        SheetDialog sheetDialog = new SheetDialog(this);
        sheetDialog.setItemClickListener(new SheetDialog.OnSheetDialogListener() {
            @Override
            public void onItemClick(int id, int position) {
                switch (id) {
                    case SheetDialog.TYPE_TAKE_PICTURE:
                        if (PermissionUtils.lacksPermissions(ChatReportActivity.this,
                                PERMISSIONS)) {
                            // 缺少权限时, 进入权限配置页面
                            PermissionsActivity.startActivityForResult(ChatReportActivity.this,
                                    REQUEST_CODE_ASK_CAMERA_PERMISSION, PERMISSIONS);
                        } else {
                            showCameraAction();
                        }
                        break;
                    case SheetDialog.TYPE_SELECT_PHOTO:
                        if (PermissionUtils.lacksPermissions(ChatReportActivity.this,
                                PERMISSIONS)) {
                            // 缺少权限时, 进入权限配置页面
                            PermissionsActivity.startActivityForResult(ChatReportActivity.this,
                                    REQUEST_CODE_ASK_WRITE_PERMISSION, PERMISSIONS_WRITE);
                        } else {
                            goToSelectPicture();
                        }
                        break;
                }
            }
        });
        sheetDialog.show();
    }

调用相机：

private void showCameraAction() {
        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        try {
            mTmpFile = FileUtils.createTmpFile(this);
        } catch (IOException e) {
            e.printStackTrace();
        }
        Uri photoOutputUri = FileProvider.getUriForFile(this,
                getPackageName() + ".fileprovider", mTmpFile);
        if (mTmpFile != null && mTmpFile.exists()) {
            intent.putExtra(MediaStore.EXTRA_OUTPUT, photoOutputUri);
            startActivityForResult(intent, REQUEST_CAMERA);
        }
    }

调用相册：

private void goToSelectPicture() {
        Intent intent = new Intent(Intent.ACTION_PICK,
                MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
        intent.setType("image/*");
        startActivityForResult(Intent.createChooser(intent, "选择图片"), REQUEST_GALLERY);
    }

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        // 拒绝时, 关闭页面, 缺少主要权限, 无法运行
        if (requestCode == REQUEST_CODE_ASK_CAMERA_PERMISSION) {
            if (resultCode == PermissionsActivity.PERMISSIONS_DENIED) {
                Toast.makeText(ChatReportActivity.this, "缺少必要权限", Toast.LENGTH_SHORT).show();
            } else {
                showCameraAction();
            }
            return;
        }

        if (resultCode == RESULT_OK) {
            handleImgRequest(requestCode, data);
        }
    }

配置文件需要加入：

      <provider
            android:name="android.support.v4.content.FileProvider"
            android:authorities="com.yjtx.fsl.fileprovider"
            android:exported="false"
            android:grantUriPermissions="true">
            <meta-data
                android:name="android.support.FILE_PROVIDER_PATHS"
                android:resource="@xml/file_paths" />
        </provider>

然后在，res目录中，新建一个xml文件，然后创建 file_paths.xml文件。

<?xml version="1.0" encoding="utf-8"?>
<paths>
    <!--<external-path path="Android/data/com.yjtx.fsl/" name="files_root" />-->
    <!--<external-path path="." name="external_storage_root" />-->
    <external-path name="external_files" path="."/>
</paths>

转载：https://www.jianshu.com/p/55b817530fa3