i want to take a Photo after clicking on a button. But i am getting NullPointerException
when trying to get URI
with FileProvider
.
Here is my ErrorCode:
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.XmlResourceParser android.content.pm.PackageItemInfo.loadXmlMetaData(android.content.pm.PackageManager, java.lang.String)' on a null object reference
at android.support.v4.content.FileProvider.parsePathStrategy(FileProvider.java:583)
at android.support.v4.content.FileProvider.getPathStrategy(FileProvider.java:557)
at android.support.v4.content.FileProvider.getUriForFile(FileProvider.java:399)
at ibas.orosol.BildActivity.takePicture(BildActivity.java:86)
at java.lang.reflect.Method.invoke(Native Method)
at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
at android.view.View.performClick(View.java:5637)
at android.view.View$PerformClick.run(View.java:22429)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
The Problem-Line seems to be:
mUri = FileProvider.getUriForFile(getApplication().getApplicationContext(),
"ibas.provider", file);
Here´s my Code:
public void takePicture(View view) throws IOException {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
try{
File file = createImageFile();
mUri = FileProvider.getUriForFile(getApplication().getApplicationContext(),
"ibas.provider", file);
intent.putExtra(MediaStore.EXTRA_OUTPUT, mUri);
startActivityForResult(intent, REQUEST_IMAGE_CAPTURE);
} catch (IOException e){
e.printStackTrace();
}
}
private File createImageFile() throws IOException {
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath = "file:" + image.getAbsolutePath();
return image;
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
String path = "sdcard/orosol/captured_image.jpg";
if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == Activity.RESULT_OK) {
Log.i("uri-data", "Uri: " + mUri.toString());
mBitmap = getBitmapFromUri(mImageView,BildActivity.this,mUri);
mImageView.setImageBitmap(mBitmap);
mImageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
}
}
My Manifest:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="ibas.orosol">
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.CALL_PHONE" />
<uses-feature
android:name="android.hardware.camera"
android:required="false" />
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="ibas.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths" />
</provider>
<!--
The ACCESS_COARSE/FINE_LOCATION permissions are not required to use
Google Maps Android API v2, but you must specify either coarse or fine
location permissions for the 'MyLocation' functionality.
-->
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.AppCompat.NoActionBar">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".MenuActivity" />
<activity
android:name=".HeizoelActivity"
android:theme="@style/AppTheme">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value=".MenuActivity" />
</activity>
<activity
android:name=".BildActivity"
android:theme="@style/AppTheme">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value=".MenuActivity" />
>
</activity>
<activity
android:name=".FacebookActivity"
android:theme="@style/AppTheme">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value=".MenuActivity" />
</activity>
<!--
The API key for Google Maps-based APIs is defined as a string resource.
(See the file "res/values/google_maps_api.xml").
Note that the API key is linked to the encryption key used to sign the APK.
You need a different API key for each encryption key, including the release key that is used to
sign the APK for publishing.
You can define the keys for the debug and release targets in src/debug/ and src/release/.
-->
<meta-data
android:name="com.google.android.geo.API_KEY"
android:value="@string/google_maps_key" />
<activity
android:name=".KontakteActivity"
android:theme="@style/AppTheme">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value=".MenuActivity" />
</activity>
<activity android:name=".UeberUnsActivity"
android:theme="@style/AppTheme">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value=".MenuActivity" />
</activity>
</application>
Provider in res/xml
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="external_files" path="."/> </paths>
Any Idea where the Problem Occurs?
The NullPointerException can be avoided using checks and preventive techniques like the following: Making sure an object is initialized properly by adding a null check before referencing its methods or properties. Using Apache Commons StringUtils for String operations e.g. using StringUtils.
What is NullPointerException? It is a run-time exception that arises when an application or a program tries to access the object reference(accessing methods) which has a null value stored in it.
In short, NullPointerException is thrown when a program attempts to use an object reference, which has the null value. For example: public class SampleClass{ public static void main(String[] args){ String sampleString= null; System.
The provider tag is outside of the application tag in the manifest file .
You should add it inside the <application></application>
tag
<provider
android:name="android.support.v4.content.FileProvider"
android:authorities="ibas.provider"
android:exported="false"
android:grantUriPermissions="true">
<meta-data
android:name="android.support.FILE_PROVIDER_PATHS"
android:resource="@xml/provider_paths" />
</provider>
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