Develop Reference

getDeclaredField can't get all field of the class( exclude the class) Toast.TN

when I hand the Toast BadTokenException with reflection in my android app ，but in the devices HUAWEI honor 10（android 9.0 Emui 9.0.0） and devices one plus 5T（android 9.0 H2OS 9.0.2） run this code above can not get Toast.TN class field, and I get the Exception msg "No field mHandler in class Landroid/widget/Toast$TN; (declaration of 'android.widget.Toast$TN' appears in /system/framework/framework.jar!classes2.dex)"
private static Field sField_TN_Handler;
static {
try {
sField_TN = Toast.class.getDeclaredField("mTN");
sField_TN.setAccessible(true);
sField_TN_Handler=sField_TN.getType().getDeclaredField("mHandler");
sField_TN_Handler.setAccessible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
where is problem with getDeclaredField(String field) method, getDeclaredField can't get all fields of the Toast.TN in android ?could someone help me?

Connecting my app to local network using smb protocol

I'm trying to connect my Android application to my company local network (Windows) using smb protocol. The problem is I'm kinda newbie on this matter and something is missing me.
The goal is download the file AREQA.txt from the network to the device. However I don't even can verify if the code can trace the file location because the application crashes when I compile it to the device (it loads fine but crashes when I call the DownLoadF001 procedure). Here's the code:
public void DownLoadF001(View v) {
jcifs.Config.registerSmbURLHandler();
String user;
String password;
String filename;
File localFile;
SmbFile path = null;
try {
NtlmPasswordAuthentication auth = new NtlmPasswordAuthentication(null,"######", "********");
path = new SmbFile("smb:\\192.168.1.11/.../AREQA.txt", auth);
try {
if(path.exists()){
Toast.makeText(getApplicationContext(), "Sucesso!", Toast.LENGTH_LONG).show();
}
} catch (Exception e1) {
Toast.makeText(getApplicationContext(), e1.toString(), Toast.LENGTH_LONG).show();
}
} catch (MalformedURLException e2) {
Toast.makeText(getApplicationContext(), e2.toString(), Toast.LENGTH_LONG).show();
}
}
I already tried to remove the inside try from the main one (with all its associated code), and the application stops crashing. However, without it, I can't see if the connection is working.
EDIT: I managed to catch the error (Exception e1):
java.lang.NullPointerException: Attempt to invoke virtual method int java.lang.String.length()' on a null object reference. Any ideas to solve it?
Also, as pointed by #greenapps, I'm calling this procedure from a .xml button by onClick method.

Is possible turn on/off data connection in Android Lollipop rooted?

I'm creating an app that needs to change the data connection.
I found a solution: using su commands, but the problem is that Toast Warning shows every time when I execute the command....
Is possible using these commands without toast warning ?
Or
Is there a way to toggle the data connection enabled with TelephonyManager using reflections? I tried it, but it didn't works.
My code is below:
public static void setMobileDataState(boolean mMobileDataEnabled){
try{
if(mMobileDataEnabled)
Shell.runAsRoot(new String[]{"svc data enable"});
else
Shell.runAsRoot(new String[]{"svc data disable"});
}
catch (Exception ex){
Utilities.log(ex.toString());
}
}
public class Shell {
public static void runAsRoot(String[] mCommands){
try {
Process mProcess = Runtime.getRuntime().exec("su");
DataOutputStream mOS = new DataOutputStream(mProcess.getOutputStream());
for (String mCommand : mCommands) {
mOS.writeBytes(mCommand + "\n");
}
mOS.writeBytes("exit\n");
mOS.flush();
}catch (Exception o){
Utilities.log(o.toString());
}
}
}

I found the solution.....
I did the following:
I rooted my device
I installed my app as system app, it's simple, just copy your apk into /system/priv-app/myApk.apk and set chmod 644 permissions. If you have a doubt, check this post (If i set my android app to a system app, after a factory reset, will it be removed from the phone?).
I just removed the /system/app/SuperSU folder
I did a factory reset on device, and that is it ..... =D

Sony: SampleNotificationExtension: Sample app throwing exceptions

I'm attempting to send notifications to Sony LiveWare devices
I've installed: com.sonyericsson.extras.liveware.extension.notificationsample, but I get errors and exceptions while trying to run it:
Load the preference activity onto the device
Check "Active" on the preferences screen
The following method is called in SampleExtensionService:
private void addData() {
Random rand = new Random();
int index = rand.nextInt(5);
String name = NAMES[index];
String message = MESSAGE[index];
long time = System.currentTimeMillis();
long sourceId = NotificationUtil
.getSourceId(this, EXTENSION_SPECIFIC_ID);
if (sourceId == NotificationUtil.INVALID_ID) {
Log.e(LOG_TAG, "Failed to insert data");
return;
}
String profileImage = ExtensionUtils.getUriString(this,
R.drawable.widget_default_userpic_bg);
ContentValues eventValues = new ContentValues();
eventValues.put(Notification.EventColumns.EVENT_READ_STATUS, false);
eventValues.put(Notification.EventColumns.DISPLAY_NAME, name);
eventValues.put(Notification.EventColumns.MESSAGE, message);
eventValues.put(Notification.EventColumns.PERSONAL, 1);
eventValues.put(Notification.EventColumns.PROFILE_IMAGE_URI, profileImage);
eventValues.put(Notification.EventColumns.PUBLISHED_TIME, time);
eventValues.put(Notification.EventColumns.SOURCE_ID, sourceId);
try {
getContentResolver().insert(Notification.Event.URI, eventValues);
} catch (IllegalArgumentException e) {
Log.e(LOG_TAG, "Failed to insert event", e);
} catch (SecurityException e) {
Log.e(LOG_TAG, "Failed to insert event, is Live Ware Manager installed?", e);
} catch (SQLException e) {
Log.e(LOG_TAG, "Failed to insert event", e);
}
}
The first problem is that "long sourceId = NotificationUtil.getSourceId(this, EXTENSION_SPECIFIC_ID)" returns -1
I'm not sure how to change, but the docs say it is an optional field. So I removed it to see if I could get any further:
When removing the sourceId code I get an exception on the insert call:
"java.lang.SecurityException: You do not have sufficient permission to perform a insert"
My Environment:
HTC One V paired with a LiveView wrist pager
http://www.amazon.co.uk/Sony-Ericsson-0001516170-LIVE-VIEW/dp/B00477X6DA
I've got the followings apps installed
LiveView
SmartConnect(LiveWare Manager)
I'd appreciate any help getting this sample to work or if anyone knows of a more straight forward approach to doing simple text notifications for LiveWare.
EDIT:
Made some progress. Found an emulator here:
android-sdk\add-ons\addon-sony_add-on_sdk_1_0-sony-16\apk_files
I installed that on the phone. The "SampleExtensionService" works fine in the emulator.
My assumption now is that add-on sample is not compatible with the LiveView device.

The LiveView is unfortunately not supported by the SmartExtension APIs. Instead, there is a specific developer kit for the LiveView here.
If you would, in the future, buy a newer wearable device from Sony Mobile, a notification extension based on the Smart Extension APIs would be usable for several devices including SmartWatch, SmartWatch 2, SBH50, SBH52 etc.

jNetPcap on Android: problem with findAllDevs method!

I've sucessfully compiled jNetPcap as a shared library for Android. I have made a simple application using this code: http://jnetpcap.com/examples/classic to test the API.
The problem is that when I call the method findAllDevs and exception is raised with this message: "Can't read list of devices, error issocket: Permission denied"
I cannot understand the reason, since I have made a call in the first part of my program so as to get root permissions for my application and I test my application to a rooted phone. When I run the application, a pop up is raised with this message:"SnifferApp has been granted Superuser permissions" and then the exception occurs.
Any ideas?
Here is a piece of my code:
Process p = Runtime.getRuntime().exec("su");
/*try {
Thread.sleep(10000);
} catch (InterruptedException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} // do nothing for 1000 miliseconds (1 second)
*/
try {
System.loadLibrary(JNETPCAP_LIBRARY_NAME);
}
catch (UnsatisfiedLinkError e) {
System.out.println("Native code library failed to load.\n" + e);
}
/***************************************************************************
* First get a list of devices on this system
**************************************************************************/
int r = Pcap.findAllDevs(alldevs, errbuf);
r = Pcap.findAllDevs(alldevs, errbuf);
if (r == Pcap.NOT_OK || alldevs.isEmpty()) {
tv.append("Can't read list of devices, error is" + errbuf
.toString());
setContentView(tv);
return;
}

As far as I understand, you're creating a new process and getting superuser permission, but your app doesn't have them.
Try adding this permission in your manifest file:
<uses-permission android:name="android.permission.INTERNET" />
as I guess findAllDevs is going to open the network devices on the phone.