Develop Reference

How do I programmatically dismiss a crash dialog?

I'm building a DPC (Device Policy Controller), and one of the issues I'm seeing is that while the Play Store and Play Services are being updated, the Google Contact Sync service crashes -- leaving the typical crash dialog on the screen. Since part of the idea of the initial set up process is to have as little user interaction as possible, how can I dismiss this dialog programmatically (since I seem to be pretty much guaranteed that this will happen)?
I've tried dismissing system dialogs...
ctx.sendBroadcast(new Intent(Intent.ACTION_CLOSE_SYSTEM_DIALOGS));
... but that doesn't seem to do the trick.
Since this is a DPC, anything that requires device ownership/administration is fine.
edit: Usually I have no UI on screen at the time, so if one is necessary please do mention it. Also, preferably the solution should work on at least 6.0+, if not 4.0+.

Try to do it onWindowsFocusChanged method like this for example :
#Override
public void onWindowFocusChanged(boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
if (!hasFocus) {
Intent ctx= new Intent(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);
sendBroadcast(ctx);
}
}
I'm not sure about app crash Dialog but maybe it'll help you

AppErrorDialog can be dismissed by broadcasting ACTION_CLOSE_SYSTEM_DIALOGS if Android version is N.
ctx.sendBroadcast(new Intent(Intent.ACTION_CLOSE_SYSTEM_DIALOGS));
However, AppErrorDialog won't be displayed if phone is locked.
public boolean canShowErrorDialogs() {
return mShowDialogs && !mSleeping && !mShuttingDown
&& mLockScreenShown != LOCK_SCREEN_SHOWN;
} // ActivityManagerService

Please try this code.
try {
Class ActivityManagerNative = Class.forName("android.app.ActivityManagerNative");
Class IActivityManager = Class.forName("android.app.IActivityManager");
Method getDefault = ActivityManagerNative.getMethod("getDefault", null);
Object am = IActivityManager.cast(getDefault.invoke(ActivityManagerNative, null));
Method closeSystemDialogs = am.getClass().getMethod("closeSystemDialogs", String.class);
closeSystemDialogs.invoke(am, "DPC close");
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}

Dropbox Synchronous interrupts

In my Android app, when the following code is successful:
mDbxAcctMgr.startLink(SyncActivity.this,REQUEST_LINK_TO_DBX);
This code runs:
if (ds.getSyncStatus().hasIncoming) {
try {
Map<String, Set<DbxRecord>> mMap = mDatastore
.sync();
dataHasIncoming(mMap); // Inserted into the database
} catch (DbxException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
If you close the app while this is occurring, dataHasIncoming(mMap) just inserts part of the data, but loses the rest. Is there any way around this, such as setting a node, or re-opening the synchronization without checking all the data?

Windows Azure Service Client

I'm trying the my Azure Mobile Service. Below is the code to make a new ToDo item entry. The sample Android code shows how to create a mobile client. I added it to the onCreate method as mentioned in the example.
But the insert always fails. I always get an exception which says com.microsoft.windowsazure.mobileservices.MobileServiceException: Error while processing request.
mClient does get initialized. But, mClient.mCurrentUser is null. Not sure if this is a problem.
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
try {
mClient = new MobileServiceClient("https://myservice.azure-mobile.net/",
"slkerjasfi234eSomePrivateKey", this);
Item item = new Item();
item.setText("Awesome item");
item.setComplete(false);
mClient.getTable(Item.class).insert(item,
new TableOperationCallback<Item>() {
public void onCompleted(Item entity,
Exception exception,
ServiceFilterResponse response) {
if (exception == null) {
ShowMessage("Success");
} else {
ShowMessage("Failed");
}
}
});
} catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

In my case, it looked like the key (parameter 2 in MobileServiceClient constructor) was incorrect. That is how I had downloaded it though. It happened again today and I manually fixed the key and it worked for another service. Believe it was the same issue here. To view your key, you go to your service in Azure and click Manage Keys at the bottom.

android: how to make sure i posted correctly using httppost

I have a web address www.abc.com/check ... I have created a web service on this address for receiving data. Through an android app i send some data to this address using following code:
public class TestappActivity extends Activity {
EditText ch;
Button btn;
InputStream is;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ch=(EditText)findViewById(R.id.ch);
btn=(Button)findViewById(R.id.btn);
btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
sendData();
}
});
}
private void sendData() {
Log.i(getClass().getSimpleName(), "send task - start");
HttpParams p=new BasicHttpParams();
p.setParameter("name", ch.getText());
HttpClient client = new DefaultHttpClient(p);
try {
HttpResponse response=client.execute(new HttpPost("http://www.abc.com/check"));
is=response.getEntity().getContent();
} catch (ClientProtocolException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Log.i(getClass().getSimpleName(), "send task - end");
}
}
How can i find if my post was successful ? What do i get back when i post something. ?

[update]Simple solution, you can just check the status code
response.getStatusLine().getStatusCode();
It's a integer(200 means OK, 500 means error on server) , Reference Here
Or a completely check by using the response body
response.getEntity().getContent();
It is generated on the server by your service, so if you want to assure the invocation is really successful, you can return something to client. e.g. a XML string
"<status>OK</status>"
in the response body would be enough. You will get it on client and then do whatever you want to do.
I recommend the simpler solution. Thanks shraddha

I guess baoz is right, but there is one simple alternative to this.
response.getStatusLine.getstatuscode(); //200-successful
It will return numeric response code for success as well as error. Moreover, if the response is negative, it will return you relevant error code so that you can track and catch those errors.
Regards.

Facebook with Android: unexpected NullPointerException

I have some code that connects my app to Facebook. When you log in you proceed to the next activity. If you are already logged in when you start the app you miss out the log in section. On the following page I want to be able to log out, every time I press logout I get a null pointer. Can anyone help?
My code for log out is:
private void logout() {
try {
facebookConnector.getFacebook().logout(getApplicationContext());
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
The code that is run when the app is started to check if the person has logged on is:
if (facebookConnector.getFacebook().isSessionValid()) {
Intent i = new Intent(facebook.this, facebook2.class);
startActivity(i);
finish();
}
A print screen of my error can be seen here:
Any help would be great. If you need more info please comment and I will provide asap.

facebookConnector.getFacebook() seems to return null