Android 4.4前后版本读取图库图片和拍照完美解决方案
2018-01-22 17:19
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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());
}
Android 4.4(含)开始,通过方式访问图库后,返回的Uri如下(访问“最近”):
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):
而4.4之前返回的Uri只存在一种形式,如下:
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:
从相册选择照片方法比较:
4.4及以上选取照片后需要调用剪切方法:
拍照通用方法,对返回数据做处理:
显示等处理如下:
提供GIthub工程地址:https://github.com/ZBJDSBJ/CameraDemo
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());
}
为什么会不一样呢?
Android 4.4(含)开始,通过方式访问图库后,返回的Uri如下(访问“最近”):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
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
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
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;
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 b6d4 .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); }
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); } }
提供GIthub工程地址:https://github.com/ZBJDSBJ/CameraDemo
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