java.lang.NullPointerException：尝试调用虚拟方法“java.lang.String android.net.Uri.getScheme()”
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java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.net.Uri.getScheme()'
提问by RushDroid
I am Trying To upload image to server from gallery and camera.When i Choose image from gallery to upload to server its Work Perfactly.But when i Select camera captured Image for upload to server Its Crash And Showing the error.
我正在尝试将图像从图库和相机上传到服务器。当我从图库中选择图像上传到服务器时，它的工作Perfactly。但是当我选择相机捕获的图像上传到服务器时，它崩溃并显示错误。
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.net.Uri.getScheme()' on a null object reference
At OnActivityResult.
在 OnActivityResult。
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_IMAGE && resultCode == RESULT_OK
&& null != data) {
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
decodeFile(picturePath);
new ImageUploadTask().execute();
}else {
Toast.makeText(getApplicationContext(), "User Canceled",
Toast.LENGTH_LONG).show();
}
}
i got the error on this line in onActivityResult
我在 onActivityResult 的这一行收到错误
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
The method i used for open camera on button click.
我用于在按钮单击时打开相机的方法。
loadimage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
AlertDialog.Builder builder = new AlertDialog.Builder(Add_Info.this);
builder.setMessage("Select Image From")
.setCancelable(true)
.setPositiveButton("Camera", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent, CAMERA_REQUEST);
mImageCaptureUri = Uri.fromFile(new File(Environment
.getExternalStorageDirectory(), "tmp_avatar_"
+ String.valueOf(System.currentTimeMillis())
+ ".jpg"));
}
})
.setNegativeButton("Gallery", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
Intent i = new Intent(
Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, RESULT_LOAD_IMAGE);
}
});
AlertDialog alert = builder.create();
alert.show();
}
});
Help Me solve this problem.I don't know How t get this error even after i used is already in my Previous PROJECT.
帮我解决这个问题。我不知道即使在我之前的项目中已经使用过之后，我也不知道如何得到这个错误。
THANKS in Advance
提前致谢
采纳答案by KeyOne
I had same issue when working with Camera api and Intent of onActivityResult, finally I found out it depends on your android device version, in Android M (Marshmallow - 6.0–6.0.1 ) onActivityResult intent is like below :
我在使用 Camera api 和 onActivityResult 的 Intent 时遇到了同样的问题，最后我发现这取决于您的 android 设备版本，在 Android M (Marshmallow - 6.0–6.0.1 ) onActivityResult 意图如下：
requestCode : 230 resultCode : -1 intent :Intent{dat=file:///storage/emulated/0/Pictures/Rahnama/IMG_20160508_121332_1519065 564.jpg typ=image/jpeg } RESULT_OK : -1
and for android versions lower than Marshmallow:
对于低于 Marshmallow 的 android 版本：
requestCode : 230 resultCode : -1 intent : Intent { dat=content://media/external/images/media/309 (has extras) } RESULT_OK : -1
I think you must check android version onActivityResult and the for android versions Marshmallow to get direct file from path in the Uri and Intent:
我认为您必须检查 android 版本 onActivityResult 和 android 版本 Marshmallow 以从 Uri 和 Intent 中的路径获取直接文件：
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (Build.VERSION.SDK_INT == Build.VERSION_CODES.M){
final Uri data = intent.getData();
final File file = new File(data.getPath());
// now you can upload your image file
}else{
// in android version lower than M your method must work
}
I hope it can be useful for you.
我希望它对你有用。
回答by alpha
I meet this problem either, after many test, I found its because I set the attribute named android:windowIsTranslucent=true, if I delete this attribute from style, it always work.
我也遇到这个问题，经过多次测试，我发现它是因为我设置了名为 的属性android:windowIsTranslucent=true，如果我从样式中删除这个属性，它总是有效。
回答by Ahamadullah Saikat
if (null != account.getPhotoUrl()) {
// Write code here
}
