Develop Reference

How to show dialogue for network change states?

I have a code for network change state in android. but now problem is that code shows the snack-bar when network state changed. i want that it will show dialogue box when network state get changed. I already done everything. i just want instead of snack-bar dialogue will be shown.
IntentFilter intentFilter = new IntentFilter(NetworkStateChangedReceiver.NETWORK_AVAILABLE_ACTION);
LocalBroadcastManager.getInstance(this).registerReceiver(new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
boolean isNetworkAvailable = intent.getBooleanExtra(IS_NETWORK_AVAILABLE, false);
String networkStatus = isNetworkAvailable ? "connected" : "disconnected";
Snackbar.make(findViewById(R.id.activity_dashboard), "Network Status: " + networkStatus, Snackbar.LENGTH_LONG).show();
}
}, intentFilter);

Just use the AlertDialog.Builder to create an alert dialog instead of Snackbar. Something along the following lines should work,
IntentFilter intentFilter = new IntentFilter(NetworkStateChangedReceiver.NETWORK_AVAILABLE_ACTION);
LocalBroadcastManager.getInstance(this).registerReceiver(new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
boolean isNetworkAvailable = intent.getBooleanExtra(IS_NETWORK_AVAILABLE, false);
String networkStatus = isNetworkAvailable ? "connected" : "disconnected";
//Snackbar.make(findViewById(R.id.activity_dashboard), "Network Status: " + networkStatus, Snackbar.LENGTH_LONG).show();
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setMessage(R.string.dialog_message).setTitle(R.string.dialog_title);
AlertDialog dialog = builder.create();
}
}, intentFilter);

This is a simple AlertDialog that you can use:
public static Dialog createSimpleOkDialog(Context context, String title, String message) {
AlertDialog.Builder alertDialog = new AlertDialog.Builder(context)
.setTitle(title)
.setMessage(message)
.setNegativeButton(android.R.string.ok, null);
return alertDialog.create();
}

I am trying to get URL from string using JAVA

I am trying to get URL from string using JAVA. but my variable not working in "Uri.parse" section (no value in variable). please consider i am beginner in coding
Error is : " Cannot assign a value to final variable 'result' "
My code:
showResultDialogue(result.getContents());
..
public void showResultDialogue(final String result) {
AlertDialog.Builder builder;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
builder = new AlertDialog.Builder(this, android.R.style.Theme_Material_Dialog_Alert);
} else {
builder = new AlertDialog.Builder(this);
}
Pattern p = Pattern.compile("[\\w\\.]+\\.(?:com|cc|net|ru|in)[^,\\s]*");
Matcher m = p.matcher(result);
builder.setTitle("Example Title")
.setMessage("Text is " + result);
if(m.matches()) {
builder.setPositiveButton("Go", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Intent browserIntent = new Intent(
Intent.ACTION_VIEW,
Uri.parse(result) // here is problem
);
startActivity(browserIntent);
}
});
}

Since you have provided no information of why it does not work, I am just gonna assume the URL is missing http since you're regex does not match that, in that case I would just do this
Edit: do you really need your regex? Android has a built in way of matching URLS.
You can find the docs here https://developer.android.com/reference/android/util/Patterns
Patterns.WEB_URL.matcher(result).matches();
so your code is gonna look like this
if (Patterns.WEB_URL.matcher(result).matches()) {
builder.setPositiveButton("Go", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Intent browserIntent = new Intent(
Intent.ACTION_VIEW,
Uri.parse(!result.startsWith("http://") && !result.startsWith("https://") ? "http://" + result : result)
);
startActivity(browserIntent);
}
});
}

How to save the intent Extras in Shared prefrences

Here is my code which request user for their username:
private void request_user_name() {
final AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Enter name:");
final EditText input_field = new EditText(this);
input_field.setText(sharedpreferences.getString("username",""));
final SharedPreferences.Editor editor = sharedpreferences.edit();
builder.setCancelable(false);
builder.setView(input_field);
final String savedName = sharedpreferences.getString(username,"");
input_field.setText(savedName);
input_field.setSelection(input_field.getText().length());
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
name = input_field.getText().toString();
if(TextUtils.isEmpty(savedName)) {
input_field.setError("Your message");
builder.setCancelable(false);
}
editor.putString(username, name);
editor.apply();
}
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
if(TextUtils.isEmpty(savedName)) {
input_field.setError("Your message");
builder.setCancelable(false);
}
else
{
dialogInterface.cancel();
request_user_name();
}
}
});
builder.show();
}
And this is how I pass he username to next Activity:
intent.putExtra("room_name",((TextView)view).getText().toString() );
intent.putExtra("user_name",name);
intent.putExtra("default_name","anyonymous");
startActivity(intent);
And this is how I receive the Intent Extra in next Activity:
if (getIntent().getExtras() != null
&& getIntent().getExtras().get("user_name")!=null) {
user_name = getIntent().getExtras().get("user_name").toString();
}else{
user_name = getIntent().getExtras().get("default_name").toString();
}
My problem is when users don't enter his name and it returns null then it returns anyonymous but when users enter his name then it pass user name to next activity. But when I restart the app then again it passes anyonymous to next activity instead of usernae the user already entered
So I need suggestion on how to save the entered username in shared prefrences and use the same in future launch of app unless new name is not entered instead of anyonymous
Thanks in advance.

If you are already using SharedPreferences to store the user_name, then you don't need to pass the user_name via Intent. SharedPreferences are global and could be accessed throughout the application. Just do:
sharedpreferences.getString("username","anonymous")
in your target activity.

How to implement a "share on whatsapp" feature in a custom Android app?

i have read several already answered article on this site and used this
Sending message through WhatsApp
i am able to share from chrome but not from app.
my code is
public void onClickWhatsApp(View view) {
PackageManager pm=getPackageManager();
try {
Intent waIntent = new Intent(Intent.ACTION_SEND);
waIntent.setType("text/plain");
String text = "YOUR TEXT HERE";
PackageInfo info=pm.getPackageInfo("com.whatsapp", PackageManager.GET_META_DATA);
//Check if package exists or not. If not then code
//in catch block will be called
waIntent.setPackage("com.whatsapp");
waIntent.putExtra(Intent.EXTRA_TEXT, text);
startActivity(Intent.createChooser(waIntent, "Share with"));
} catch (NameNotFoundException e) {
Toast.makeText(MainActivity.this, "WhatsApp not Installed", Toast.LENGTH_SHORT).show();
}
}
when i click on share button in my android app whatsapp icon it gives error page not found but when same thing is shared from chrome it just works fine.
my url is http://way2enjoy.com/app/jokes.php
if anyone can guide where the mistake is i will be thankful

you can use my code which works for me
void openWhatsappContact(String number) {
Uri uri = Uri.parse("smsto:" + number);
Intent i = new Intent(Intent.ACTION_SENDTO, uri);
i.setPackage("com.whatsapp");
startActivity(Intent.createChooser(i, ""));}
enjoy your code time:)

you can use this code also
//method used to show IMs
private void show_custom_chooser(String value) {
List<ResolveInfo> list = null;
final Intent email = new Intent(Intent.ACTION_SEND);
email.setData(Uri.parse("sms:"));
email.putExtra(Intent.EXTRA_TEXT, "" + value);
email.setType("text/plain"); // vnd.android-dir/mms-sms
WindowManager.LayoutParams WMLP = dialogCustomChooser.getWindow()
.getAttributes();
WMLP.gravity = Gravity.CENTER;
dialogCustomChooser.getWindow().setAttributes(WMLP);
dialogCustomChooser.getWindow().setBackgroundDrawable(
new ColorDrawable(android.graphics.Color.TRANSPARENT));
dialogCustomChooser.setCanceledOnTouchOutside(true);
dialogCustomChooser.setContentView(R.layout.about_dialog);
dialogCustomChooser.setCancelable(true);
ListView lvOfIms = (ListView) dialogCustomChooser
.findViewById(R.id.listView1);
PackageManager pm = getPackageManager();
List<ResolveInfo> launchables = pm.queryIntentActivities(email, 0);
// ////////////new
list = new ArrayList<ResolveInfo>();
for (int i = 0; i < launchables.size(); i++) {
String string = launchables.get(i).toString();
Log.d("heh", string);
//check only messangers
if (string.contains("whatsapp")) {
list.add(launchables.get(i));
}
}
Collections.sort(list, new ResolveInfo.DisplayNameComparator(pm));
int size = launchables.size();
adapter = new AppAdapter(pm, list, MainActivity.this);
lvOfIms.setAdapter(adapter);
lvOfIms.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1,
int position, long arg3) {
ResolveInfo launchable = adapter.getItem(position);
ActivityInfo activity = launchable.activityInfo;
ComponentName name = new ComponentName(
activity.applicationInfo.packageName, activity.name);
email.addCategory(Intent.CATEGORY_LAUNCHER);
email.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
email.setComponent(name);
startActivity(email);
dialogCustomChooser.dismiss();
}
});
dialogCustomChooser.show();
}

AlertDialog from within BroadcastReceiver?? Can it be done?

AlertDialog from within BroadcastReceiver? Can it be done? I am working on a app that will pop up a Dialog box if I get SMS message. I am trying to code this within a BroadcaseReceiver. But I cant use this line of code AlertDialog.Builder builder = new AlertDialog.Builder(this);. Can someone please help me with a hint!
public class SMSPopUpReceiver extends BroadcastReceiver {
private static final String LOG_TAG = "SMSReceiver";
public static final int NOTIFICATION_ID_RECEIVED = 0x1221;
static final String ACTION = "android.provider.Telephony.SMS_RECEIVED";
public void onReceive(Context context, Intent intent) {
Log.i(LOG_TAG, "onReceive");
if (intent.getAction().equals(SMSPopUpReceiver.ACTION)) {
StringBuilder sb = new StringBuilder();
Bundle bundle = intent.getExtras();
if (bundle != null) {
Object[] pdus = (Object[]) bundle.get("pdus");
for (Object pdu : pdus){
SmsMessage messages =
SmsMessage.createFromPdu((byte[]) pdu);
sb.append("Received SMS\nFrom: ");
sb.append(messages.getDisplayOriginatingAddress());
sb.append("\n----Message----\n");
sb.append( messages.getDisplayMessageBody());
}
}
Log.i(SMSPopUpReceiver.LOG_TAG,
"[SMSApp] onReceiveIntent: " + sb);
Toast.makeText
(context, sb.toString(), Toast.LENGTH_LONG).show();
}
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Are you sure you want to exit?")
.setCancelable(false)
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
})
.setNegativeButton("No", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
}
}

Principal issue: try to avoid placing time consuming functionalities into BroadcastReceiver. It should just receive and initiate further processing in bound Activity/Service.
UPDATE:
Please check following sources that might be helpful:
Similar questions on StackOverflow:
How to send data from BroadcastReceiver to an Activity in android?
Android SMS receiver not working
Android SDK demo example:
android-sdk-windows\samples\android-8\ApiDemos\src\com\example\android\apis\os\SmsMessagingDemo.java
And of course standard Android API documentation: http://developer.android.com/reference/android/content/BroadcastReceiver.html
UPDATE2:
Added app skeleton as it should look. Please note that no content view is defined. It is because your app will have transparent screen. To achieve that
#android:style/Theme.Translucent
is entered under Theme tag for this activity in AndroidManifest.xml.
public class NotifySMSReceived extends Activity
{
private static final String LOG_TAG = "SMSReceiver";
public static final int NOTIFICATION_ID_RECEIVED = 0x1221;
static final String ACTION = "android.provider.Telephony.SMS_RECEIVED";
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
IntentFilter filter = new IntentFilter(ACTION);
this.registerReceiver(mReceivedSMSReceiver, filter);
}
private void displayAlert()
{
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setMessage("Are you sure you want to exit?").setCancelable(
false).setPositiveButton("Yes",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
}).setNegativeButton("No",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
dialog.cancel();
}
});
AlertDialog alert = builder.create();
alert.show();
}
private final BroadcastReceiver mReceivedSMSReceiver = new BroadcastReceiver() {
#Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (ACTION.equals(action))
{
//your SMS processing code
displayAlert();
}
}
};
}

I've been looking into it and the documentation of the BroadcastReceiver actually says:
public abstract void onReceive
(Context context, Intent intent)
Since: API Level 1 This method is
called when the BroadcastReceiver is
receiving an Intent broadcast. During
this time you can use the other
methods on BroadcastReceiver to
view/modify the current result values.
The function is normally called within
the main thread of its process, so you
should never perform long-running
operations in it (there is a timeout
of 10 seconds that the system allows
before considering the receiver to be
blocked and a candidate to be killed).
You cannot launch a popup dialog in
your implementation of onReceive().
You cannot launch a popup dialog in
your implementation of onReceive()
So it seems it is not possible

This is late but this may help someone.
You cannot use alert dialog inside broadcast receiver, we can use this only in activity or service. Try like this
In your onReceive method of broadcastreceiver add
Intent i = new Intent(context, yourclass.class);
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(i);
and in yourclass set your dialog message, so that it will appear when you trigger the receiver event. I tried this and it worked me. Hope this may help some one :-)

you can create a new transparent activity and then create Alert Dialog in that activity, whenever your alert is to be displayed call that activity from your broadcast reciever ,this could work, not tested

replace the word "this" inside the AlertDilaog with "context" -- the first parameter on you onRecieve method.
public void onReceive(Context context, Intent intent)