Checking existence of an Activity

Question

I am considering the code in this question, and did the following:

First, I create a simple, empty project with only one Activity called MainActivity, which is in package com.example.plugins. I compile this project and install it to my device. The app works fine.

Then, in another project I have this code:

Intent plugins = new Intent();
plugins.setClassName("com.example.plugins", "MainActivity");
List<ResolveInfo> list = getPackageManager().queryIntentActivities(plugins,
                PackageManager.MATCH_DEFAULT_ONLY);
if (list.size() > 0) {
    tvText.setText("Plugins.");
} else {
    tvText.setText("No Plugins.");
}

I'd say this should work, but it doesn't. It gives "no plugins". Am I missing something here?

Update When using

PackageInfo pi = getPackageManager().getPackageInfo(
                    "com.example.plugins", PackageManager.GET_ACTIVITIES);

I do get the activities from that other app.

@DEADMC, that and I want to call the activity to get some info out of it. I am experimenting to create some kind of plugin system (as for example DDLs in C#) — Bart Friederichs, Sep 07 '16 at 14:08

score 0 · Answer 1 · answered Sep 07 '16 at 14:07

0

I think the MIME-type of the Intent is missing.

plugins.setType("text/plain");

answered Sep 07 '16 at 14:07

qantik

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This doesn't have any effect. – Bart Friederichs Sep 07 '16 at 14:14

score 0 · Answer 2 · answered Sep 07 '16 at 14:37

0

When setting the class name, you have to use the complete name, including package:

plugins.setClassName("com.example.plugins", "com.example.plugins.MainActivity");

answered Sep 07 '16 at 14:37

Bart Friederichs

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Checking existence of an Activity

2 Answers2