解决android4.4以上系统的相册选择图片后获取不到有效的URI

最近用到上传图片发现，当选择相册里的照片时，会出现无效的URI，android4.4以上系统，选择相册中的最近照片，也会报同样的错误。

找到如下两个方法：

方法一：

/**
* 图片选择及拍照结果
*/
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {

if (resultCode != RESULT_OK) {
return;
}
Uri uri = null;
switch (requestCode) {
case PHOTOZOOM:// 相册
if (data == null) {
return;
}
uri = data.getData();
String[] proj = {MediaStore.Images.Media.DATA};
Cursor cursor = managedQuery(uri, proj, null, null, null);
int column_index = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
path = cursor.getString(column_index);// 图片在的路径
Intent intent3 = new Intent(mContext, UserRectClipHead.class);
intent3.putExtra("path", path);
Log.i("选择图片路径",path+"");
startActivityForResult(intent3, IMAGE_COMPLETE);
break;
case PHOTOTAKE:// 拍照
path = photoSavePath + photoSaveName;
uri = Uri.fromFile(new File(path));
Intent intent2 = new Intent(mContext, UserRectClipHead.class);
intent2.putExtra("path", path);
startActivityForResult(intent2, IMAGE_COMPLETE);
break;
case IMAGE_COMPLETE:
final String temppath = data.getStringExtra("path");
Intent intent = new Intent();
saveAllPath = FileUtils.saveBitmap(compressImage(BitmapUtils.UrlToBitmap(temppath)), ((int) (Math.random() * 10000)) + ".png");//质量压缩并存储得到path
intent.putExtra("path", saveAllPath);
//                intent.putExtra("path", temppath);
setResult(0, intent);
try {
cbuilder = new CustomDialogLoading.Builder(mContext, "上传中...");
mDialog = cbuilder.create();
mDialog.show();
postFile(saveAllPath);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
add_img.setImageBitmap(BitmapUtils.UrlToBitmap(temppath));
break;
default:
break;
}
super.onActivityResult(requestCode, resultCode, data);
}

发现有些手机获取不到图片的path，后来经查找发现是因为android4.4以上的手机相册中有个最近的照片，是获取不到path路径的，更改如下可以解决：

/**
* 图片选择及拍照结果
*/
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {

if (resultCode != RESULT_OK) {
return;
}
Uri uri = null;
switch (requestCode) {
case PHOTOZOOM:// 相册
if (data == null) {
return;
}
uri = data.getData();
//此处为了解决android4.4 相册选择时的 选择最近图片 获取不到path问题
if(android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT){//4.4及以上
String wholeID = DocumentsContract.getDocumentId(uri);
String id = wholeID.split(":")[1];
String[] column = { MediaStore.Images.Media.DATA };
String sel = MediaStore.Images.Media._ID + "=?";
Cursor cursor = this.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, column,
sel, new String[] { id }, null);
int columnIndex = cursor.getColumnIndex(column[0]);
if (cursor.moveToFirst()) {
path = cursor.getString(columnIndex);
}
cursor.close();
}else{//4.4以下，即4.4以上获取路径的方法
String[] projection = { MediaStore.Images.Media.DATA };
Cursor cursor = this.getContentResolver().query(uri, projection, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
cursor.moveToFirst();
path = cursor.getString(column_index);
}
//                }
Intent intent3 = new Intent(mContext, UserRectClipHead.class);
intent3.putExtra("path", path);
Log.i("x选择图片",path+"");
startActivityForResult(intent3, IMAGE_COMPLETE);
break;
case PHOTOTAKE:// 拍照
path = photoSavePath + photoSaveName;
uri = Uri.fromFile(new File(path));
Intent intent2 = new Intent(mContext, UserRectClipHead.class);
intent2.putExtra("path", path);
startActivityForResult(intent2, IMAGE_COMPLETE);
break;
case IMAGE_COMPLETE:
final String temppath = data.getStringExtra("path");
Intent intent = new Intent();
saveAllPath = FileUtils.saveBitmap(compressImage(BitmapUtils.UrlToBitmap(temppath)), ((int) (Math.random() * 10000)) + ".png");//质量压缩并存储得到path
intent.putExtra("path", saveAllPath);
//                intent.putExtra("path", temppath);
setResult(0, intent);
try {
cbuilder = new CustomDialogLoading.Builder(mContext, "上传中...");
mDialog = cbuilder.create();
mDialog.show();
postFile(saveAllPath);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
add_img.setImageBitmap(BitmapUtils.UrlToBitmap(temppath));
break;
default:
break;
}
super.onActivityResult(requestCode, resultCode, data);
}

方法二：

/**

* 根据Uri获取图片绝对路径，解决Android4.4以上版本Uri转换

* @param activity

* @param imageUri

* @author yaoxing

* @date 2014-10-12

*/

@TargetApi(19)

public static String getImageAbsolutePath(Activity context, Uri imageUri) {

if (context == null || imageUri == null)

return null;

if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT && DocumentsContract.isDocumentUri(context, imageUri)) {

if (isExternalStorageDocument(imageUri)) {

String docId = DocumentsContract.getDocumentId(imageUri);

String[] split = docId.split(":");

String type = split[0];

if ("primary".equalsIgnoreCase(type)) {

return Environment.getExternalStorageDirectory() + "/" + split[1];

}

} else if (isDownloadsDocument(imageUri)) {

String id = DocumentsContract.getDocumentId(imageUri);

Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));

return getDataColumn(context, contentUri, null, null);

} else if (isMediaDocument(imageUri)) {

String docId = DocumentsContract.getDocumentId(imageUri);

String[] split = docId.split(":");

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;

}

String selection = MediaStore.Images.Media._ID + "=?";

String[] selectionArgs = new String[] { split[1] };

return getDataColumn(context, contentUri, selection, selectionArgs);

}

} // MediaStore (and general)

else if ("content".equalsIgnoreCase(imageUri.getScheme())) {

// Return the remote address

if (isGooglePhotosUri(imageUri))

return imageUri.getLastPathSegment();

return getDataColumn(context, imageUri, null, null);

}

// File

else if ("file".equalsIgnoreCase(imageUri.getScheme())) {

return imageUri.getPath();

}

return null;

}

public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {

Cursor cursor = null;

String column = MediaStore.Images.Media.DATA;

String[] projection = { column };

try {

cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);

if (cursor != null && cursor.moveToFirst()) {

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());

}