5
我想單擊按鈕後拍攝照片。但是當我試圖獲得URI和FileProvider時我得到NullPointerException。嘗試使用FileProvider獲取URI時出現NullPointerException（Android）
這是我的錯誤碼：
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)
的問題行似乎是：
mUri = FileProvider.getUriForFile(getApplication().getApplicationContext(),
"ibas.provider", file);
Here's我碼：
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);
}
}
我的清單：在res
<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>
提供商/ XML
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="external_files" path="."/> </paths>
任何想法，其中發生問題時S'
你加在res/XML文件夾中的XML文件？ –
是的，我已經添加了。仍是同樣的問題。 – skm
發佈........ –