How to implement voice and video calls in my apps

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I would like to know how I can implement video and voice calls (similar to Whatsapp) in my Apps written in JAVA for Android. Is there any open source SDK that makes this easy?

java android sdk

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It is not a simple job when it comes to audio/video calls (so much so that after a long time Whatsapp implemented video calls). You can search more about SIP protocol on android which is available on Android from level 9 API.

An example call would be this section that defines the action android.SipDemo.INCOMING_CALL, which will be used by an intention filter when the device receives a call. See:

Intent intent = new Intent();
intent.setAction("android.SipDemo.INCOMING_CALL");
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, intent, Intent.FILL_IN_DATA);
mSipManager.open(mSipProfile, pendingIntent, null);

However, there are some platforms open sourcing I might as well help you with those resources. It would be interesting to analyze each one make a decision that best fits their needs.

Read more about the SIP protocol itself documentation.

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