Android在7.0以后传递Uri
直接和低版本一样操作会报FileUriExposedException
,涉及到了数据共享问题,具体实现:
首先在AndroidManifest
中添加如下:
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| </application> ... <provider android:name="android.support.v4.content.FileProvider" android:authorities="包名.fileprovider" android:exported="false" android:grantUriPermissions="true"> <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/file_paths"/> </provider> </application>
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在属性android:authorities
中值填写为包名+fileprovider
,然后在meta-data
中的resource
中对应相关的xml文件,创建该文件并填写内容:
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| <?xml version="1.0" encoding="utf-8"?> <path> <external-path name="my_images" path=""/> </path>
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其中
- //代表的根目录: Context.getFilesDir()
- //代表的根目录: Environment.getExternalStorageDirectory()
- //代表的根目录: getCacheDir()
name 可以随便填写,path为共享空间,不填为整个根目录,进入代码模块:
定义常量:
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| private final int TAKE_PHOTO_CODE = 1000; private final int SELECT_PHOTO_CODE = 1001; private final int CUT_PICTURE_CODE = 1002;
private File file; private String filePath = Constant.TAKE_PHOTO_PATH; private File cropFile; private String cropPath = Constant.CUT_PHOTO_PATH;
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然后初始化文件,如果已经存在要删除后在创建:
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| file = new File(filePath); cropFile = new File(cropPath);
try { if (file.exists()) { file.delete(); } file.createNewFile();
if (cropFile.exists()) { cropFile.delete(); } cropFile.createNewFile(); } catch (IOException e) { e.printStackTrace(); }
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开始拍照,在拍照之前请检查权限,确认拥有相机权限之后调用如下方法:
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| Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); Uri temp; if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) { temp = FileProvider.getUriForFile(ContextHandler.currentActivity(), "包名.fileprovider", file); } else { temp = Uri.fromFile(file); }
intent.putExtra(MediaStore.Images.Media.ORIENTATION, 0); intent.putExtra(MediaStore.EXTRA_OUTPUT, temp); startActivityForResult(intent, TAKE_PHOTO_CODE);
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调用图库就简单多了:
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| Intent intent = new Intent(Intent.ACTION_PICK, null); intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "image/*"); startActivityForResult(intent, SELECT_PHOTO_CODE);
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然后是裁剪的方法:
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| public void startPhotoZoom(Uri uri) { Intent intent = new Intent("com.android.camera.action.CROP"); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) { intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); } intent.setDataAndType(uri, "image/*"); intent.putExtra("crop", "true"); intent.putExtra("scale", true);
intent.putExtra("aspectX", 1); intent.putExtra("aspectY", 1);
intent.putExtra("outputX", 300); intent.putExtra("outputY", 300);
intent.putExtra("return-data", false); intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(cropFile)); intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString()); intent.putExtra("noFaceDetection", true); startActivityForResult(intent, CUT_PICTURE_CODE); }
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拍照、选图、裁图返回来的处理:
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| @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (resultCode == Activity.RESULT_OK && requestCode == TAKE_PHOTO_CODE) { Uri mUri; if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) { mUri = FileProvider.getUriForFile(ContextHandler.currentActivity(), "com.nuhtech.cmedicine.fileprovider", file); }else{ mUri = Uri.fromFile(file); } startPhotoZoom(mUri); } else if (resultCode == Activity.RESULT_OK && requestCode == SELECT_PHOTO_CODE) { if (data != null) { startPhotoZoom(data.getData()); } } else if (resultCode == Activity.RESULT_OK && requestCode == CUT_PICTURE_CODE) { file.delete(); cropFile.delete(); } }
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