Is it possible to run android application from android application? - android

Is it possible to run android application from android application? For example, i have a button in application 1 and when i press that button i want application 2 to start. I'm developing application in react-native.
I tried with Linking component but I'm getting this error "No Activity found to handle Intent". So i tried to edit AndroidManifest.xml, also without much success.
Thanks in advance.

Yes through Intent we call Activity of another application like below Intent by passing Application Package name and its class name with full package name .
Intent intent = new Intent();
intent.setComponent(new ComponentName("com.example", "com.example.MyExampleActivity"));
startActivity(intent);
Allowing Other Apps to Start Your Activity

Related

Is it possible to load and run APK file inside Android Apps programmatically?

in App A, i have UI Box. Is it possible to load App B (APK) then load and run it into the UI Box ?
so, its like run App B with frame from App A.
I would say it is not possible to install another application from one application as android made a sandbox for each application and prevent it from touching to other applications.
NOTE: you can invoke an android package installer via Intent.
File apkFullPath = getFileStreamPath("name_of_downloaded_app.apk");
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(apkFullPath), "application/vnd.android.package-archive");
startActivity(intent);
Hope this will help and solve your problem.
You cannot run an apk without instsalling it first. What you can do is start intent for installing it and then use it as you wish.
Read this ans to start intent for installing an apk:
Install apk programmatically

How can I auto install programmatically app without start Intent.FLAG_ACTIVITY_NEW_TASK

In fact, I want to be noticed when the program is downloaded without the user having to install their own apps (Install without show permissions activity).
Now I use the following code, and I want to change this code to answer my question.
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(file),"application/vnd.android.package-archive");
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
The following image is displayed after downloading the app from my server and i dont want to show

Im looking to start a specific application using intent in android studio

I am looking to start a specific application(Dictionary app) from my app. Using intents, how would I go about launching that specific app and use it to look up the word.
There are implicit intents and explicit intents, you want an explicit intent to get your desirable.
Here is how you can do it.
Intent intent = new Intent();
intent.setComponent(new ComponentName("com.example", "com.example.MyExampleActivity"));
startActivity(intent);
in the setComponent method your Dictionary app information should go in.
CommonsWare addition to this answer,
Using an explicit Intent to talk to a third-party app is rarely the right thing to do. This code will break if the activity is not exported, or requires permissions, or the developer refactors the code and changes the class name or package, etc.
If the author of the app is documenting that your recipe is the correct way to work with that activity on that app, then that is fine, as the developer presumably intends to support this use case.

How can I start one App from another in android

I am a beginner in android , how can I start one app from inside another in android
like when I click on one button and I have to start activity of another app
You can start another app from you application using intent but you need to know its main activity name or at least that applications package name , in the following example it uses another apps package name to start
Intent LaunchIntent = getPackageManager().getLaunchIntentForPackage("com.package.address");
startActivity(LaunchIntent);

How to merge two applications?

I am developing an Answering Machine application.
Basically it has to automatically accept the call, give a voice message and start recording the call.
I have designed an application to automatically answer to calls and another application to record calls. Individually both the apps work fine. But after i merged them the application crashes.
I saw a an example here :Combine 2 android apps. I merged the apps same way but still the application crashes.
How can I properly merge my apps?
Try
Intent intent = new Intent(Intent.ACTION_MAIN);
intent.setClassName("com.example.package", "com.example.package.ActivityToStart");
startActivity(intent);
or
PackageManager pm = getPackageManager();
Intent intent = pm.getLaunchIntentForPackage("com.example.package");
startActivity(intent);
to invoke 2 apps. And retrieve files from their default save location.

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