Android 4.4 前后版本读取图库图片和拍照完美解决方案-获取文件路径
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文章出处:http://blog.csdn.net/zbjdsbj/article/details/42387551
4.3或以下,选了图片之后,根据Uri来做处理,很多帖子都有了,我就不详细说了.主要是4.4,如果使用上面pick的原生方法来选图,返回的uri还是正常的,但如果用ACTION_GET_CONTENT的方法,返回的uri跟4.3是完全不一样的,4.3返回的是带文件路径的,而4.4返回的却是content://com.android.providers.media.documents/document/image:3951这样的,没有路径,只有图片编号的uri.这就导致接下来无法根据图片路径来裁剪的步骤了.
来自overflow大牛的方法,4.4得到的uri,需要以下方法来获取文件的路径:
- /**
- * <br>功能简述:4.4及以上获取图片的方法
- * <br>功能详细描述:
- * <br>注意:
- * @param context
- * @param uri
- * @return
- */
- @TargetApi(Build.VERSION_CODES.KITKAT)
- public static String getPath(final Context context, final Uri uri) {
- final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
- // DocumentProvider
- if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) {
- // ExternalStorageProvider
- if (isExternalStorageDocument(uri)) {
- final String docId = DocumentsContract.getDocumentId(uri);
- final String[] split = docId.split(“:”);
- final String type = split[0];
- if (“primary”.equalsIgnoreCase(type)) {
- return Environment.getExternalStorageDirectory() + “/” + split[1];
- }
- }
- // DownloadsProvider
- else if (isDownloadsDocument(uri)) {
- final String id = DocumentsContract.getDocumentId(uri);
- final Uri contentUri = ContentUris.withAppendedId(
- Uri.parse(”content://downloads/public_downloads”), Long.valueOf(id));
- return getDataColumn(context, contentUri, null, null);
- }
- // MediaProvider
- else if (isMediaDocument(uri)) {
- final String docId = DocumentsContract.getDocumentId(uri);
- final String[] split = docId.split(“:”);
- final String type = split[0];
- Uri contentUri = null;
- if (“image”.equals(type)) {
- contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
- } else if (“video”.equals(type)) {
- contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;
- } else if (“audio”.equals(type)) {
- contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;
- }
- final String selection = “_id=?”;
- final String[] selectionArgs = new String[] { split[1] };
- return getDataColumn(context, contentUri, selection, selectionArgs);
- }
- }
- // MediaStore (and general)
- else if (“content”.equalsIgnoreCase(uri.getScheme())) {
- // Return the remote address
- if (isGooglePhotosUri(uri))
- return uri.getLastPathSegment();
- return getDataColumn(context, uri, null, null);
- }
- // File
- else if (“file”.equalsIgnoreCase(uri.getScheme())) {
- return uri.getPath();
- }
- return null;
- }
- public static String getDataColumn(Context context, Uri uri, String selection,
- String[] selectionArgs) {
- Cursor cursor = null;
- final String column = “_data”;
- final String[] projection = { column };
- try {
- cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs,
- null);
- if (cursor != null && cursor.moveToFirst()) {
- final int index = cursor.getColumnIndexOrThrow(column);
- return cursor.getString(index);
- }
- } finally {
- if (cursor != null)
- cursor.close();
- }
- return null;
- }
- /**
- * @param uri The Uri to check.
- * @return Whether the Uri authority is ExternalStorageProvider.
- */
- public static boolean isExternalStorageDocument(Uri uri) {
- return “com.android.externalstorage.documents”.equals(uri.getAuthority());
- }
- /**
- * @param uri The Uri to check.
- * @return Whether the Uri authority is DownloadsProvider.
- */
- public static boolean isDownloadsDocument(Uri uri) {
- return “com.android.providers.downloads.documents”.equals(uri.getAuthority());
- }
- /**
- * @param uri The Uri to check.
- * @return Whether the Uri authority is MediaProvider.
- */
- public static boolean isMediaDocument(Uri uri) {
- return “com.android.providers.media.documents”.equals(uri.getAuthority());
- }
- /**
- * @param uri The Uri to check.
- * @return Whether the Uri authority is Google Photos.
- */
- public static boolean isGooglePhotosUri(Uri uri) {
- return “com.google.android.apps.photos.content”.equals(uri.getAuthority());
- }</span></span>
/** * <br>功能简述:4.4及以上获取图片的方法 * <br>功能详细描述: * <br>注意: * @param context * @param uri * @return */ @TargetApi(Build.VERSION_CODES.KITKAT) public static String getPath(final Context context, final Uri uri) { final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT; // DocumentProvider if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) { // ExternalStorageProvider if (isExternalStorageDocument(uri)) { final String docId = DocumentsContract.getDocumentId(uri); final String[] split = docId.split(":"); final String type = split[0]; if ("primary".equalsIgnoreCase(type)) { return Environment.getExternalStorageDirectory() + "/" + split[1]; } } // DownloadsProvider else if (isDownloadsDocument(uri)) { final String id = DocumentsContract.getDocumentId(uri); final Uri contentUri = ContentUris.withAppendedId( Uri.parse("content://downloads/public_downloads"), Long.valueOf(id)); return getDataColumn(context, contentUri, null, null); } // MediaProvider else if (isMediaDocument(uri)) { final String docId = DocumentsContract.getDocumentId(uri); final String[] split = docId.split(":"); final String type = split[0]; Uri contentUri = null; if ("image".equals(type)) { contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI; } else if ("video".equals(type)) { contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI; } else if ("audio".equals(type)) { contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI; } final String selection = "_id=?"; final String[] selectionArgs = new String[] { split[1] }; return getDataColumn(context, contentUri, selection, selectionArgs); } } // MediaStore (and general) else if ("content".equalsIgnoreCase(uri.getScheme())) { // Return the remote address if (isGooglePhotosUri(uri)) return uri.getLastPathSegment(); return getDataColumn(context, uri, null, null); } // File else if ("file".equalsIgnoreCase(uri.getScheme())) { return uri.getPath(); } return null; } public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) { Cursor cursor = null; final String column = "_data"; final String[] projection = { column }; try { cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null); if (cursor != null && cursor.moveToFirst()) { final int index = cursor.getColumnIndexOrThrow(column); return cursor.getString(index); } } finally { if (cursor != null) cursor.close(); } return null; } /** * @param uri The Uri to check. * @return Whether the Uri authority is ExternalStorageProvider. */ public static boolean isExternalStorageDocument(Uri uri) { return "com.android.externalstorage.documents".equals(uri.getAuthority()); } /** * @param uri The Uri to check. * @return Whether the Uri authority is DownloadsProvider. */ public static boolean isDownloadsDocument(Uri uri) { return "com.android.providers.downloads.documents".equals(uri.getAuthority()); } /** * @param uri The Uri to check. * @return Whether the Uri authority is MediaProvider. */ public static boolean isMediaDocument(Uri uri) { return "com.android.providers.media.documents".equals(uri.getAuthority()); } /** * @param uri The Uri to check. * @return Whether the Uri authority is Google Photos. */ public static boolean isGooglePhotosUri(Uri uri) { return "com.google.android.apps.photos.content".equals(uri.getAuthority()); }</span></span>
为什么会不一样呢?
- Uri is:content://com.android.providers.media.documents/document/image%3A18838
- 2 Uri.getPath is :/document/image:18838
- 3 对应的图片真实路径:/storage/emulated/0/Pictures/Screenshots/Screenshot_2014-09-22-21-40-53.png</span>
Uri is:content://com.android.providers.media.documents/document/image%3A188382 Uri.getPath is :/document/image:188383 对应的图片真实路径:/storage/emulated/0/Pictures/Screenshots/Screenshot_2014-09-22-21-40-53.png</span>
不但如此,对于不同类型图库,返回的Uri形式并不相同(访问普通相册):
- Uri is:content://media/external/images/media/18822
- 2 Uri.getPath is :/external/images/media/18822
- 3 对应的图片真实路径:/storage/emulated/0/Download/20130224235013.jpg</span>
Uri is:content://media/external/images/media/188222 Uri.getPath is :/external/images/media/188223 对应的图片真实路径:/storage/emulated/0/Download/20130224235013.jpg</span>
而4.4之前返回的Uri只存在一种形式,如下:
- Uri is:content://media/external/images/media/14046
- 2 Uri.getPath is :/external/images/media/14046
- 3 对应的图片真实路径:/storage/emulated/0/DCIM/Camera/20130224235013.jpg
Uri is:content://media/external/images/media/140462 Uri.getPath is :/external/images/media/140463 对应的图片真实路径:/storage/emulated/0/DCIM/Camera/20130224235013.jpg
因此,在Android 4.4或更高版本设备上,通过简单的getDataColumn(Context, Uri, null, null)进行图片数据库已经不能满足所有需求,因此在获取图片真实路径的时候需要根据不同类型区分对待。
版本判断:
- //版本比较:是否是4.4及以上版本
- final boolean mIsKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
//版本比较:是否是4.4及以上版本 final boolean mIsKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT;
从相册选择照片方法比较:
- /**
- * <br>功能简述:4.4及以上从相册选择照片
- * <br>功能详细描述:
- * <br>注意:
- */
- @TargetApi(Build.VERSION_CODES.KITKAT)
- private void SelectImageUriAfterKikat() {
- Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
- intent.addCategory(Intent.CATEGORY_OPENABLE);
- intent.setType(”image/*”);
- startActivityForResult(intent, SELECET_A_PICTURE_AFTER_KIKAT);
- }
/** * <br>功能简述:4.4及以上从相册选择照片 * <br>功能详细描述: * <br>注意: */ @TargetApi(Build.VERSION_CODES.KITKAT) private void SelectImageUriAfterKikat() { Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT); intent.addCategory(Intent.CATEGORY_OPENABLE); intent.setType("image/*"); startActivityForResult(intent, SELECET_A_PICTURE_AFTER_KIKAT); }
- /
- <br>功能简述:4.4以下从相册选照片并剪切
- <br>功能详细描述:
- <br>注意:
- /
- private void cropImageUri() {
- Intent intent = new Intent(Intent.ACTION_GET_CONTENT, null);
- intent.setType(”image/*”);
- intent.putExtra(”crop”, “true”);
- intent.putExtra(”aspectX”, 1);
- intent.putExtra(”aspectY”, 1);
- intent.putExtra(”outputX”, 640);
- intent.putExtra(”outputY”, 640);
- intent.putExtra(”scale”, true);
- intent.putExtra(”return-data”, false);
- intent.putExtra(MediaStore.EXTRA_OUTPUT,
- Uri.fromFile(new File(IMGPATH, TMP_IMAGE_FILE_NAME)));
- intent.putExtra(”outputFormat”, Bitmap.CompressFormat.JPEG.toString());
- intent.putExtra(”noFaceDetection”, true); // no face detection
- startActivityForResult(intent, SELECT_A_PICTURE);
- }
/
* <br>功能简述:4.4以下从相册选照片并剪切
* <br>功能详细描述:
* <br>注意:
*/
private void cropImageUri() {
Intent intent = new Intent(Intent.ACTION_GET_CONTENT, null);
intent.setType("image/*");
intent.putExtra("crop", "true");
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
intent.putExtra("outputX", 640);
intent.putExtra("outputY", 640);
intent.putExtra("scale", true);
intent.putExtra("return-data", false);
intent.putExtra(MediaStore.EXTRA_OUTPUT,
Uri.fromFile(new File(IMGPATH, TMP_IMAGE_FILE_NAME)));
intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
intent.putExtra("noFaceDetection", true); // no face detection
startActivityForResult(intent, SELECT_A_PICTURE);
}
4.4及以上选取照片后需要调用剪切方法:
- /
- <br>功能简述: 4.4及以上选取照片后剪切方法
- <br>功能详细描述:
- <br>注意:
- @param uri
- /
- private void cropImageUriAfterKikat(Uri uri) {
- Intent intent = new Intent(“com.android.camera.action.CROP”);
- intent.setDataAndType(uri, ”image/”);
- intent.putExtra(”crop”, “true”);
- intent.putExtra(”aspectX”, 1);
- intent.putExtra(”aspectY”, 1);
- intent.putExtra(”outputX”, 640);
- intent.putExtra(”outputY”, 640);
- intent.putExtra(”scale”, true);
- intent.putExtra(”return-data”, true); //返回数据bitmap
- intent.putExtra(”outputFormat”, Bitmap.CompressFormat.JPEG.toString());
- intent.putExtra(”noFaceDetection”, true); // no face detection
- startActivityForResult(intent, SET_ALBUM_PICTURE_KITKAT);
- }
/
* <br>功能简述: 4.4及以上选取照片后剪切方法
* <br>功能详细描述:
* <br>注意:
* @param uri
*/
private void cropImageUriAfterKikat(Uri uri) {
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(uri, "image/*");
intent.putExtra("crop", "true");
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
intent.putExtra("outputX", 640);
intent.putExtra("outputY", 640);
intent.putExtra("scale", true);
intent.putExtra("return-data", true); //返回数据bitmap
intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
intent.putExtra("noFaceDetection", true); // no face detection
startActivityForResult(intent, SET_ALBUM_PICTURE_KITKAT);
}
拍照通用方法,对返回数据做处理:
- /
- <br>功能简述:对拍照的图片剪切
- <br>功能详细描述:
- <br>注意:
- @param uri
- */
- private void cameraCropImageUri(Uri uri) {
- Intent intent = new Intent(“com.android.camera.action.CROP”);
- intent.setDataAndType(uri, ”image/jpeg”);
- intent.putExtra(”crop”, “true”);
- intent.putExtra(”aspectX”, 1);
- intent.putExtra(”aspectY”, 1);
- intent.putExtra(”outputX”, 640);
- intent.putExtra(”outputY”, 640);
- intent.putExtra(”scale”, true);
- if (mIsKitKat) {
- intent.putExtra(”return-data”, true);
- } else {
- intent.putExtra(”return-data”, false);
- intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
- }
- intent.putExtra(”outputFormat”, Bitmap.CompressFormat.JPEG.toString());
- intent.putExtra(”noFaceDetection”, true);
- startActivityForResult(intent, SET_PICTURE);
- }
/
* <br>功能简述:对拍照的图片剪切
* <br>功能详细描述:
* <br>注意:
* @param uri
*/
private void cameraCropImageUri(Uri uri) {
Intent intent = new Intent("com.android.camera.action.CROP");
intent.setDataAndType(uri, "image/jpeg");
intent.putExtra("crop", "true");
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
intent.putExtra("outputX", 640);
intent.putExtra("outputY", 640);
intent.putExtra("scale", true);
if (mIsKitKat) {
intent.putExtra("return-data", true);
} else {
intent.putExtra("return-data", false);
intent.putExtra(MediaStore.EXTRA_OUTPUT, uri);
}
intent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
intent.putExtra("noFaceDetection", true);
startActivityForResult(intent, SET_PICTURE);
}
显示等处理如下:
- @Override
- protected void onActivityResult(int requestCode, int resultCode, Intent data) {
- super.onActivityResult(requestCode, resultCode, data);
- if (requestCode == SELECT_A_PICTURE) {
- if (resultCode == RESULT_OK && null != data) {
- Log.i(”zou”, “4.4以下的”);
- Bitmap bitmap = decodeUriAsBitmap(Uri.fromFile(new File(IMGPATH,
- TMP_IMAGE_FILE_NAME)));
- mAcountHeadIcon.setImageBitmap(bitmap);
- }
- } else if (requestCode == SELECET_A_PICTURE_AFTER_KIKAT) {
- if (resultCode == RESULT_OK && null != data) {
- Log.i(”zou”, “4.4以上上的”);
- mAlbumPicturePath = getPath(MainActivity.this, data.getData());
- cropImageUriAfterKikat(Uri.fromFile(new File(mAlbumPicturePath)));
- }
- } else if (requestCode == SET_ALBUM_PICTURE_KITKAT) {
- Log.i(”zou”, “4.4以上上的 RESULT_OK”);
- Bitmap bitmap = data.getParcelableExtra(”data”);
- mAcountHeadIcon.setImageBitmap(bitmap);
- } else if (requestCode == TAKE_A_PICTURE) {
- Log.i(”zou”, “resultCode:” + resultCode);
- cameraCropImageUri(Uri.fromFile(new File(IMGPATH, IMAGE_FILE_NAME)));
- } else if (requestCode == SET_PICTURE) {
- Log.i(”zou”, “SET_PICTURE-resultCode:” + resultCode);
- Bitmap bitmap = null;
- if (mIsKitKat) {
- if (null != data) {
- bitmap = data.getParcelableExtra(”data”);
- }
- } else {
- bitmap = decodeUriAsBitmap(Uri.fromFile(new File(IMGPATH, IMAGE_FILE_NAME)));
- }
- mAcountHeadIcon.setImageBitmap(bitmap);
- }
- }
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == SELECT_A_PICTURE) {
if (resultCode == RESULT_OK && null != data) {
Log.i(“zou”, “4.4以下的”);
Bitmap bitmap = decodeUriAsBitmap(Uri.fromFile(new File(IMGPATH,
TMP_IMAGE_FILE_NAME)));
mAcountHeadIcon.setImageBitmap(bitmap);
}
} else if (requestCode == SELECET_A_PICTURE_AFTER_KIKAT) {
if (resultCode == RESULT_OK && null != data) {
Log.i(“zou”, “4.4以上上的”);
mAlbumPicturePath = getPath(MainActivity.this, data.getData());
cropImageUriAfterKikat(Uri.fromFile(new File(mAlbumPicturePath)));
}
} else if (requestCode == SET_ALBUM_PICTURE_KITKAT) {
Log.i(“zou”, “4.4以上上的 RESULT_OK”);
Bitmap bitmap = data.getParcelableExtra(“data”);
mAcountHeadIcon.setImageBitmap(bitmap);
} else if (requestCode == TAKE_A_PICTURE) {
Log.i(“zou”, “resultCode:” + resultCode);
cameraCropImageUri(Uri.fromFile(new File(IMGPATH, IMAGE_FILE_NAME)));
} else if (requestCode == SET_PICTURE) {
Log.i(“zou”, “SET_PICTURE-resultCode:” + resultCode);
Bitmap bitmap = null;
if (mIsKitKat) {
if (null != data) {
bitmap = data.getParcelableExtra(“data”);
}
} else {
bitmap = decodeUriAsBitmap(Uri.fromFile(new File(IMGPATH, IMAGE_FILE_NAME)));
}
mAcountHeadIcon.setImageBitmap(bitmap);
}
}
GIthub工程地址:https://github.com/ZBJDSBJ/CameraDemo
- Android 4.4 前后版本读取图库图片和拍照完美解决方案-获取文件路径
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