android createTempFile throws permission denied?
Solution 1
You need to create the temp files in a directory that your application owns. You should use createTempFile(String prefix, String suffix, File directory)
, where directory is the location to which the temp file is to be written. You can get a valid location for directory with the result from Context.getFilesDir()
or Context.getDir(String name, int mode)
.
Solution 2
I think that you just missed the permission to write at the external storage, since temp files are created there by default. Add
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
to your manifest and it should work.
Solution 3
Even after adding <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" this to manifest I was getting error. But after adding this android:requestLegacyExternalStorage="true" in application tag of manifest file I am able to createTempFile and able capture pic from phone.
<application android:requestLegacyExternalStorage="true"
mobibob
mobile application developer providing end-to-end content and technology integration
Updated on July 22, 2020Comments
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mobibob almost 4 years
This is simple, but not working. I am trying to create a temp file (later a permanent storage file) for preview of an MP3 file. I have tried the following variants of the suffix as following example:
public class StudyFileIo extends Activity { private static final String TAG = "StudyFileIo"; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); try { File tempFooFile = File .createTempFile("foo", "dat"); Log.i(TAG, tempFooFile.getAbsolutePath()); } catch (IOException e) { Log.e(TAG, e.toString()); e.printStackTrace(); } } }
Log:
09-07 11:25:20.299 E/StudyFileIo( 8859): java.io.IOException: Permission denied 09-07 11:25:20.299 W/System.err( 8859): java.io.IOException: Permission denied 09-07 11:25:20.299 W/System.err( 8859): at java.io.File.createNewFileImpl(Native Method) 09-07 11:25:20.299 W/System.err( 8859): at java.io.File.createNewFile(File.java:1160) 09-07 11:25:20.299 W/System.err( 8859): at java.io.File.createTempFile(File.java:1224) 09-07 11:25:20.299 W/System.err( 8859): at java.io.File.createTempFile(File.java:1182) 09-07 11:25:20.299 W/System.err( 8859): at com.mobibob.studyfileio.StudyFileIo.onCreate(StudyFileIo.java:25) 09-07 11:25:20.299 W/System.err( 8859): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 09-07 11:25:20.299 W/System.err( 8859): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 09-07 11:25:20.309 W/System.err( 8859): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 09-07 11:25:20.309 W/System.err( 8859): at android.app.ActivityThread.access$2300(ActivityThread.java:125) 09-07 11:25:20.309 W/System.err( 8859): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 09-07 11:25:20.309 W/System.err( 8859): at android.os.Handler.dispatchMessage(Handler.java:99) 09-07 11:25:20.309 W/System.err( 8859): at android.os.Looper.loop(Looper.java:123) 09-07 11:25:20.309 W/System.err( 8859): at android.app.ActivityThread.main(ActivityThread.java:4627) 09-07 11:25:20.309 W/System.err( 8859): at java.lang.reflect.Method.invokeNative(Native Method) 09-07 11:25:20.309 W/System.err( 8859): at java.lang.reflect.Method.invoke(Method.java:521) 09-07 11:25:20.319 W/System.err( 8859): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:876) 09-07 11:25:20.319 W/System.err( 8859): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:634) 09-07 11:25:20.319 W/System.err( 8859): at dalvik.system.NativeStart.main(Native Method)
Is there some AndroidManifest.xml setting that I am missing (I am using default manifest)?