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Editorial Team
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Asked: 2026-06-12T11:42:04+00:00

How can I know (in an Activity for example) that the app was installed

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How can I know (in an Activity for example) that the app was installed and runned from Eclipse (plugged in mobile through USB)?

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  1. Editorial Team

    All applications are signed by a certificate. Even when launched by eclipse. When using the android SDK in eclipse, a debugging keystore was created by default and used each time you use the IDE to build and push your application to the device/emulator.

    You can grab information about the keystore in your code and verify if it is your own signed code, or something else. I used the quick and dirty code below on my application in eclipse:

        try {
        PackageInfo pi = this.getPackageManager().getPackageInfo( this.getPackageName(), PackageManager.GET_SIGNATURES);
        Signature[] signatures = pi.signatures;
        byte[] cert = signatures[0].toByteArray();
        InputStream input = new ByteArrayInputStream(cert);
        CertificateFactory cf = CertificateFactory.getInstance("X509");
        X509Certificate cf509 = (X509Certificate) cf.generateCertificate(input);
        Log.d(LOG_TAG, "Certificate issued by: " + cf509.getIssuerDN() );
    } catch ( Exception e ) {

    The result was:

    Certificate issued by: CN=Android Debug, O=Android, C=US

    Better structured code and credit goes to this link:
    http://thomascannon.net/misc/android_apk_certificate/

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