Develop Reference

How to send app invite using android studio

I need to send app invitation message from my app to friends via whatsapp,facebook,hike,... with the message and playstore link.I have seen this kind of invitations in other apps like hike,whatscall,... like the
attached image
I want to send exactly the same kind of message with the playstore link and app logo for my app also and it should be shared using all the available sharing option in users mobile.In my application i have included a inform friends menu and on clicking on that this function should work.I have seen firebase app invite examples but it needs google-services.json and i think it will only send text message from users email,I am not sure about that.

Sending text msg or image or both via app can be done using Action_send intent. The following code should work for your requirement.
void shareImageWithText(){
Uri contentUri = Uri.parse("android.resource://" + getPackageName() + "/drawable/" + "ic_launcher");
StringBuilder msg = new StringBuilder();
msg.append("Hey, Download this awesome app!");
msg.append("\n");
msg.append("https://play.google.com/store/apps/details?id=Your_Package_Name"); //example :com.package.name
if (contentUri != null) {
Intent shareIntent = new Intent();
shareIntent.setAction(Intent.ACTION_SEND);
shareIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); // temp permission for receiving app to read this file
shareIntent.setType("*/*");
shareIntent.putExtra(android.content.Intent.EXTRA_TEXT, msg.toString());
shareIntent.putExtra(Intent.EXTRA_STREAM, contentUri);
try {
startActivity(Intent.createChooser(shareIntent, "Share via"));
} catch (ActivityNotFoundException e) {
Toast.makeText(getApplicationContext(), "No App Available", Toast.LENGTH_SHORT).show();
}
}
}

How to share text in Instagram

I need share text to instagram but I can't use android
intent.putExtra(Intent.EXTRA_TEXT,"MY TEXT");
nothing happen.please help me to do this

Instagram have stopped accepting pre-populated capitions to increase the quality of content in the system. See this post.
http://developers.instagram.com/post/125972775561/removing-pre-filled-captions-from-mobile-sharing

Generic code for sharing text with any social app :
Step1 : Get the package name of app you wanna share :
To get the package name use adb logcat -s ActivityManager this command in windows and run the app like for example you want package name for instagram so run above command and open instagram app you would get the package name in logs
Note : the adb command listed above is for windows .
For ubntu you can use adb logcat | grep "ActivityManager"
STEP 2 : Once you got the package name of app below is generic code for sharing text .
try {
Intent shareOnAppIntent = new Intent();
shareOnAppIntent .setAction(Intent.ACTION_SEND);
shareOnAppIntent .putExtra(Intent.EXTRA_TEXT, getResources().getString(R.string.share_body));
shareOnAppIntent .setType("text/plain");
shareOnAppIntent .setPackage(PACKAGE_NAME_OF_APP);
startActivity(shareOnAppIntent );
} catch (Exception e) {
e.printStackTrace();
Toast.makeText(ShareAppActivity.this, "APP is not installed", Toast.LENGTH_LONG).show();
}

Unfortunately Instagram doesn't receives text from intent. it receives only EXTRA_STREAM object. you can share only images of format jpeg, gif, png. Since they are not providing any SDK you cant share in any other way.
Check Instagram developer documentation here they were clearly mentioning that the accepting Intent Parameter as EXTRA_STREAM
This is the code for sharing photo in Instagram
String type = "image/*";
String filename = "/myPhoto.jpg";
String mediaPath = Environment.getExternalStorageDirectory() + filename;
createInstagramIntent(type, mediaPath);
private void createInstagramIntent(String type, String mediaPath){
// Create the new Intent using the 'Send' action.
Intent share = new Intent(Intent.ACTION_SEND);
// Set the MIME type
share.setType(type);
// Create the URI from the media
File media = new File(mediaPath);
Uri uri = Uri.fromFile(media);
// Add the URI to the Intent.
share.putExtra(Intent.EXTRA_STREAM, uri);
// Broadcast the Intent.
startActivity(Intent.createChooser(share, "Share to"));
}

Here is the intent code to share image and text in Instagram.
Intent shareIntent = new Intent(Intent.ACTION_SEND);
shareIntent.setType("image/*");
shareIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
shareIntent.putExtra(Intent.EXTRA_STREAM,uri);
shareIntent.putExtra(Intent.EXTRA_TEXT,"YOUR TEXT TO SHARE IN INSTAGRAM");
shareIntent.setPackage("com.instagram.android");
return shareIntent;

How can I put my program in the action list in android

When you want to share a file like the music file, if you have telegram and viber in your device you can choose one of these to share the music file. How can I do this? How can I add my program in the action list? What are the principles?

Android uses Intents for operations to be performed. Read the documentation for more information.
For example to share an mp3 file you can start an Intent like this:
File recordingFile = new File(recording.getFilePath());
Uri fileUri = Uri.fromFile(recordingFile);
Intent i = new Intent(Intent.ACTION_SEND);
i.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
i.setType("audio/mp3");
i.putExtra(Intent.EXTRA_STREAM, fileUri);
try {
startActivity(Intent.createChooser(i, "Share " + recording.getName()));
} catch (android.content.ActivityNotFoundException ex) {
Toast.makeText(this, "There are no app installed to share your audio file.", Toast.LENGTH_SHORT).show();
}

How to send a picture via email in Android, previewed but NOT attached..?

I want to send a picture preview in my mail Intent.
I dont want to attach it, i just want it to be shown.
This is my intent:
String textToSend = getString(R.string.mailHi)+"<br><br>"+getString(R.string.mailText)+getTextToSendViaMail();
Uri pngUri = null;
File currentShopImage = new File(Environment.getExternalStorageDirectory().toString()+"/OpenGuide/"+Integer.toString(keyId)+"_1_normal.pn_");
if(currentShopImage.exists()){
File pngFile = new File(currentShopImage.toString());
pngUri = Uri.fromFile(pngFile);
}
Intent i = new Intent(Intent.ACTION_SEND);
i.setType("text/plain");
//i.putExtra(Intent.EXTRA_EMAIL, new String[] { emailCim });
i.putExtra(Intent.EXTRA_SUBJECT, "OpenGuide");
i.putExtra(Intent.EXTRA_TEXT, Html.fromHtml(textToSend));
if(pngUri!= null)
i.putExtra(Intent.EXTRA_STREAM, pngUri);
try {
startActivity(Intent.createChooser(i, getString(R.string.SendMail)));
} catch (android.content.ActivityNotFoundException ex) {
Toast.makeText(ShopActivity.this, getString(R.string.MailClientNotFound), Toast.LENGTH_SHORT).show();
}
How can i achive such a thing ?

As far as I understood your problem, you want to place the image inside the mail with other text. In the words of Email protocol it's called an INLINE Attachment.
You would not be able to do this with intents as none of the email clients installed on the device supports creating html messages.
If it's really a core part of your app, you should consider a third party api to do this. One of the such library is JavaMail. You would be able to send html messages through this library but will take some time in setting up.
Here's a link that may give you some hint, how it's done.

Then you need to send a HTML generated email afaik.

Tweet in android app instead authenticating the user

I'm developing an android application and I want to can share in a tweet a picture. I search for tutorials and all of them have to authentificate the user before can post a tweet. Is there any way to use the account that's stored on your phone instead of authenticating the user again?
I don't want to have a share button, I want that like in iPhone can post a tweet.
If anyone know of other toturial that works and it's better please tell me, I don't want a share button, only I want to tweet.
Thanks

Use shareIntent, as described here:
public void shareTwitter() {
String message = "Your message to post";
try {
Intent sharingIntent = new Intent(Intent.ACTION_SEND);
sharingIntent.setClassName("com.twitter.android","com.twitter.android.PostActivity");
sharingIntent.putExtra(Intent.EXTRA_TEXT, message);
startActivity(sharingIntent);
} catch (Exception e) {
Log.e("In Exception", "Comes here");
Intent i = new Intent();
i.putExtra(Intent.EXTRA_TEXT, theObject.getName());
i.setAction(Intent.ACTION_VIEW);
i.setData(Uri.parse("https://mobile.twitter.com/"));
startActivity(i);
}
}