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Could not connect to remote process. Aborting debug session. problem debug

i have problem
Waiting for application to come online: com.example.distribution_system | com.example.distribution_system.test
Waiting for application to come online: com.example.distribution_system | com.example.distribution_system.test
Waiting for application to come online: com.example.distribution_system | com.example.distribution_system.test
--->Could not connect to remote process. Aborting debug session.
I did
--->adb kill-server && adb start-server
--->invalidate cache / restart
but not work yet
image1:--> [1]: https://i.stack.imgur.com/HZF5D.png
image2:--> [2]: https://i.stack.imgur.com/hrE4a.png

I don't know why, but I was able to solve this by setting android:exported = "true" for the first Activity to launch.
<activity
android:name = ".ui.top.TopActivity"
android:exported = "true"
android:label = "#string/app_name">
<intent-filter>
<action android:name = "android.intent.action.MAIN" />
<category android:name = "android.intent.category.LAUNCHER" />
</ intent-filter>
</ activity>

Flutter java.io.File android.app.Activity.getExternalFilesDir(java.lang.String)' on a null object reference

After I install the android_alarm_manager on my project I got this error..
I/AlarmService(24713): Starting AlarmService...
E/MethodChannel#plugins.flutter.io/android_alarm_manager(24713): Failed to handle method call
E/MethodChannel#plugins.flutter.io/android_alarm_manager(24713): java.lang.NullPointerException: Attempt to invoke virtual method 'java.io.File android.app.Activity.getExternalFilesDir(java.lang.String)' on a null object reference
E/MethodChannel#plugins.flutter.io/android_alarm_manager(24713): at io.flutter.plugins.imagepicker.ImagePickerPlugin.registerWith(ImagePickerPlugin.java:27)
E/MethodChannel#plugins.flutter.io/android_alarm_manager(24713): at io.flutter.plugins.GeneratedPluginRegistrant.registerWith(GeneratedPluginRegistrant.java:29)
E/MethodChannel#plugins.flutter.io/android_alarm_manager(24713): at com.example.myapp.Application.registerWith(Application.java:18)
E/MethodChannel#plugins.flutter.io/android_alarm_manager(24713): at io.flutter.plugins.androidalarmmanager.AlarmService.startAlarmService(AlarmService.java:65)
E/MethodChannel#plugins.flutter.io/android_alarm_manager(24713): at io.flutter.plugins.androidalarmmanager.AndroidAlarmManagerPlugin.startService(AndroidAlarmManagerPlugin.java:75)
E/MethodChannel#plugins.flutter.io/android_alarm_manager(24713): at io.flutter.plugins.androidalarmmanager.AndroidAlarmManagerPlugin.onMethodCall(AndroidAlarmManagerPlugin.java:52)
E/MethodChannel#plugins.flutter.io/android_alarm_manager(24713): at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:191)
E/MethodChannel#plugins.flutter.io/android_alarm_manager(24713): at io.flutter.view.FlutterNativeView.handlePlatformMessage(FlutterNativeView.java:163)
E/MethodChannel#plugins.flutter.io/android_alarm_manager(24713): at android.os.MessageQueue.nativePollOnce(Native Method)
E/MethodChannel#plugins.flutter.io/android_alarm_manager(24713): at android.os.MessageQueue.next(MessageQueue.java:143)
E/MethodChannel#plugins.flutter.io/android_alarm_manager(24713): at android.os.Looper.loop(Looper.java:122)
E/MethodChannel#plugins.flutter.io/android_alarm_manager(24713): at android.app.ActivityThread.main(ActivityThread.java:5253)
E/MethodChannel#plugins.flutter.io/android_alarm_manager(24713): at java.lang.reflect.Method.invoke(Native Method)
E/MethodChannel#plugins.flutter.io/android_alarm_manager(24713): at java.lang.reflect.Method.invoke(Method.java:372)
E/MethodChannel#plugins.flutter.io/android_alarm_manager(24713): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:913)
E/MethodChannel#plugins.flutter.io/android_alarm_manager(24713): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:708) 4.8s
🔥 To hot reload changes while running, press "r". To hot restart (and rebuild state), press "R".
An Observatory debugger and profiler on Mi 4i is available at: http://127.0.0.1:3860/
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E/flutter (24713): [ERROR:flutter/shell/common/shell.cc(181)] Dart Error: Unhandled exception:
E/flutter (24713): PlatformException(error, Attempt to invoke virtual method 'java.io.File android.app.Activity.getExternalFilesDir(java.lang.String)' on a null object reference, null)
E/flutter (24713): #0 JSONMethodCodec.decodeEnvelope (package:flutter/src/services/message_codecs.dart:149:7)
E/flutter (24713): #1 MethodChannel.invokeMethod (package:flutter/src/services/platform_channel.dart:279:18)
E/flutter (24713): <asynchronous suspension>
E/flutter (24713): #2 AndroidAlarmManager.initialize (package:android_alarm_manager/android_alarm_manager.dart:70:10)
E/flutter (24713): <asynchronous suspension>
This is my pubspec.yaml
dependencies:
dio: "^1.0.1"
flutter:
sdk: flutter
local_auth: "^0.2.0"
shared_preferences: "^0.4.0"
http: "^0.11.3+16"
path_provider: ^0.4.1
image_picker: "^0.4.10"
multi_image_picker: "1.0.51"
datetime_picker_formfield: ^0.1.3
pull_to_refresh: ^1.1.5
connectivity: ^0.3.1
sqflite : any
location: ^1.4.1
android_alarm_manager: ^0.2.1
geolocator: '^1.7.0'
My main.dart
void main() async {
final int msgId = 0;
runApp(new LoginApp());
await AndroidAlarmManager.initialize();
await AndroidAlarmManager.periodic(
const Duration(seconds: 5), msgId, autoResendReports);
}
void autoResendReports() {
print("TEST");
final DateTime now = new DateTime.now();
final int isolateId = Isolate.current.hashCode;
print(
"[$now] Hello, world! isolate=$isolateId function='$autoResendReports'");
}
class LoginApp extends StatelessWidget {
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
return new MaterialApp(
title: '',
theme: new ThemeData(
primarySwatch: Colors.green,
),
routes: routes,
);
}
}
My AndroidManifest file
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.myapp">
<!-- The INTERNET permission is required for development. Specifically,
flutter needs it to communicate with the running application
to allow setting breakpoints, to provide hot reload, etc.
-->
<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.USE_FINGERPRINT"/>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<!-- io.flutter.app.FlutterApplication is an android.app.Application that
calls FlutterMain.startInitialization(this); in its onCreate method.
In most cases you can leave this as-is, but you if you want to provide
additional functionality it is fine to subclass or reimplement
FlutterApplication and put your custom class here. -->
<application
android:name=".Application"
android:label="MyApp"
android:icon="#mipmap/ic_launcher2">
<activity
android:name=".MainActivity"
android:launchMode="singleTop"
android:theme="#style/LaunchTheme"
android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density"
android:hardwareAccelerated="true"
android:windowSoftInputMode="adjustResize">
<!-- This keeps the window background of the activity showing
until Flutter renders its first frame. It can be removed if
there is no splash screen (such as the default splash screen
defined in #style/LaunchTheme). -->
<meta-data
android:name="io.flutter.app.android.SplashScreenUntilFirstFrame"
android:value="true" />
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<service
android:name="io.flutter.plugins.androidalarmmanager.AlarmService"
android:exported="false"/>
</application>
</manifest>
I still can't make the background service for flutter work. Please help.

I got stuck in similar issue for a while, so I tried to work around using the java file. So, basically what I am doing is that I have created the background logic I want using java in the android side, which is easy to do. Then I talk with that side from flutter using MethodChannel. My app is simply need to run an alarm when the app timer finish counting even if in background. I still have some issues in variable passing to the service in android side, which is minor I think, but in general the background thing worked fine for me.

Uri permission is not granted to a path of provider

I have a provider in my app
<provider android:authorities="com.myapp.android.provider" android:exported="false" android:name="com.myapp.android.provider.FileSystemProvider">
<grant-uri-permission android:pathPrefix="/"/>
</provider>
And when I call the following intent:
Intent intent = new Intent();
intent.setClassName(getPackageName(), "com.myapp.android.CameraActivity");
intent.setData(Uri.parse("content://com.myapp.android.provider/"));
intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION
| Intent.FLAG_GRANT_WRITE_URI_PERMISSION
| Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION
| Intent.FLAG_GRANT_PREFIX_URI_PERMISSION);
I get exception
Caused by: java.lang.SecurityException: Permission Denial: starting
Intent { dat=content://com.myapp.android.provider/ flg=0xc3
cmp=com......../com......... (has extras) } from
ProcessRecord{44955bc0 9477:com...../u0a260} (pid=9477,
uid=10260) not exported from uid 10261
What I do wrong? I tried to specify full path to a file or different directory, but it never worked.

intent.setClassName(getPackageName(), "com.myapp.android.CameraActivity");
Most likely, this is not the actual line of code that is in your app; your real code is specifying some other app. Regardless, this component is not exported, and therefore you cannot access it from your app.

<provider android:authorities="com.myapp.android.provider"
android:exported="true"<----- change android:name="com.myapp.android.provider.FileSystemProvider">
<grant-uri-permission android:pathPrefix="/"/>
</provider>

I am trying to turn on Hotspot with specific SSID on android device on a button click

I want to turn on hotspot on android phone with a specific SSID.
Whenever I hit below given code:
Method method = wifi_manager.getClass().getMethod("setWifiApEnabled", WifiConfiguration.class, boolean.class);
method.invoke(wifi_manager, wifi_configuration, true);
It gives me: java.lang.reflect.InvocationTargetException
When I added e.getCause(); it returned:
Caused by: java.lang.SecurityException: com.example.abc.magicapp was
not granted this permission: android.permission.WRITE_SETTINGS.
My Manifest file already contains these permissions:
<uses-permission android:name="android.permission.WRITE_SETTINGS"/>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

" java.lang.IllegalArgumentException: No configs match configSpec " While opening Camera Intent

This is my simple Camera Intent Demo in which i have only one Activity .....
package x.y;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.widget.ImageView;
public class PhotoShoot extends Activity {
final static int CAMERA_RESULT = 0;
ImageView imv;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(i, CAMERA_RESULT);
}
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
if (resultCode == RESULT_OK)
{
Bundle extras = intent.getExtras();
Bitmap bmp = (Bitmap) extras.get("data");
imv = (ImageView) findViewById(R.id.ReturnedImageView);
imv.setImageBitmap(bmp);
}
}
}
And Layout main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ImageView
android:id="#+id/ReturnedImageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content">
</ImageView>
</LinearLayout>
Manifest ...
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="x.y"
android:versionCode="1"
android:versionName="1.0">
<application android:icon="#drawable/icon" android:label="#string/app_name">
<activity android:name=".PhotoShoot"
android:label="#string/app_name">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Throwing "Force close" after few seconds in Android emulator 2.2 from starting of Camera intent with following Exception ...
07-06 15:26:00.999: ERROR/AndroidRuntime(544): FATAL EXCEPTION: GLThread 11
07-06 15:26:00.999: ERROR/AndroidRuntime(544): java.lang.IllegalArgumentException: No configs match configSpec
07-06 15:26:00.999: ERROR/AndroidRuntime(544): at android.opengl.GLSurfaceView$BaseConfigChooser.chooseConfig(GLSurfaceView.java:760)
07-06 15:26:00.999: ERROR/AndroidRuntime(544): at android.opengl.GLSurfaceView$EglHelper.start(GLSurfaceView.java:916)
07-06 15:26:00.999: ERROR/AndroidRuntime(544): at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1246)
07-06 15:26:00.999: ERROR/AndroidRuntime(544): at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1116)
any idea?

This is actually part of a bigger issue, and I'm hoping that by posting here, others who have experienced this error will read this entry. I equally hope that, if any of my conclusions are incorrect, someone comes forth with a more definitive explanation and/or solution.
The core issue is OpenGL support. Beginning at 2.2, Android supports OpenGL ES 2.0, and beginning at 4.0.3, Android emulators support OpenGL ES 2.0. Code that uses OpenGL ES 2.0 will not work on emulators before 4.0.3. [Evidently, the camera switched from ES 1.0 to 2.0 at Android 2.2]
But that's not all! None of the Android docs I've encountered mention that, in order to support Open GL ES 2.0 emulation, your box's graphic card chipset and driver must support OpenGL 2.0 as well. Therefore, if you enable GPU Emulation on the AVD and you still encounter this error, do the following:
1) Find out the specs on your graphic card and visit the chipset manufacturer's web site to determine if the chipset is OpenGL 2.0 compatible. If it isn't, you're S.O.L. and must stick to debugging through an actual Android device instead of an emulator.
2) Determine if you have the latest graphics driver for the chipset. Drivers obtained through Microsoft (if you're using Windows) typically do not support OpenGL, so you want to download the latest driver from the manufacturer.
I hope this helps.

Camera is not support in Android emulator so don't worry about it. This type of Error come in Android Emulator 2.2 and i have also Checked Android emulator 1.6 but not getting Error.
I have also checked above code in Android Device Samsung Galaxy Ace is working fine.