从安卓图库获取图像会导致交付结果失败

Question

>我正在尝试从图库中获取图像并通过改造发送。 但我无法获取文件的写入路径。 在SO中搜索后，我发现使用data.getData无法获取写入文件路径，现在我正在使用此方法获取文件路径：

public String getRealPathFromURI(Uri contentURI, Activity context) {
String[] projection = { MediaStore.Images.Media.DATA };
@SuppressWarnings("deprecation")
Cursor cursor = context.managedQuery(contentURI, projection, null,
null, null);
if (cursor == null)
return null;
int column_index = cursor
.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
if (cursor.moveToFirst()) {
String s = cursor.getString(column_index);
// cursor.close();
return s;
}
// cursor.close();
return null;
}

这是我从图库应用程序返回的结果的地方：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode){
case 100 :
if(resultCode == RESULT_OK && data != null){
attachmentFile = new File(getRealPathFromURI(data.getData(),this));
Toast.makeText(this,"File Explorer OK",Toast.LENGTH_SHORT).show();
}
else
Toast.makeText(this,"File Explorer NOK",Toast.LENGTH_SHORT).show();
break;
}

但是在使用此方法和类似方法后，我收到此错误：

java.lang.RuntimeException: Failure delivering result     ResultInfo{who=null, request=100, result=-1, data=Intent {    dat=content://com.android.providers.media.documents/document/image:160640  flg=0x1 }} to activity  {com.x.TicketActivity}:  java.lang.NullPointerException

Answer 1

试试这个：

public static String getRealPathFromURI(Context context, Uri uri) {
String result;
Cursor cursor = context.getContentResolver().query(uri, null, null, null, null);
if (cursor == null) {
result = uri.getPath();
} else {
cursor.moveToFirst();
int idx = cursor.getColumnIndex(MediaStore.Images.ImageColumns.DATA);
result = cursor.getString(idx);
cursor.close();
}
return result;
}

2-不要忘记使用您在onActivityResult((中使用的相同代码启动活动

startActivityForResult(pickerIntent, 200);

3 - 获取结果

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case GALLERY_REQUEST_CODE:
if (resultCode == RESULT_OK && data.getData() != null) {
File file = new File(FileUtils.getRealPathFromURI(this, data.getData()));
Log.i(TAG, "onActivityResult: File: " + file);
} else {
Log.i(TAG, "onActivityResult: Data is null");
}
break;
}
}