How to run a system Android application?

Question

Java

This is the python code

import os
os.system("python")

How will the analogue of this code look like in java for Android?

Answer 1

There is a huge difference between running applications and shell commands.
For an application, you need to know the package.

Intent launchIntent = getPackageManager().getLaunchIntentForPackage(<пакет>);
if (launchIntent != null) { // null если приложение не найдено или не имеет активити для запуска.
    startActivity(launchIntent);
}

But running something from the shell, without superuser rights, is not easy. The code will be something like this.

try{
    Process su = Runtime.getRuntime().exec("su");
    DataOutputStream outputStream = new DataOutputStream(su.getOutputStream());
    outputStream.writeBytes("<команда>\n");
    outputStream.flush();
    outputStream.writeBytes("exit\n");
    outputStream.flush();
    su.waitFor();
}catch(IOException e){
    throw new Exception(e);
}catch(InterruptedException e){
    throw new Exception(e);
}