I have worked through the example in the SDK and am now receiving the
following error when trying to run the demo app.
Caused by: java.lang.ClassNotFoundException: Didn't find class
"com.rythmair.licenseverification.MainActivity" on path: DexPathList[[zip
file
"/data/app/com.rythmair.licenseverification-2/base.apk"],nativeLibraryDirectories=[/vendor/lib,
/system/lib]]
Here is my full MainActivity
package com.rythmair.licenseverification;
import android.app.Activity;import android.app.AlertDialog;import
android.app.Dialog;import android.content.DialogInterface;import
android.content.Intent;import android.net.Uri;import android.os.Bundle;import
android.os.Handler;import android.provider.Settings;import
android.util.Log;import android.view.View;import android.widget.Button;import
android.widget.TextView;
import com.google.android.vending.licensing.AESObfuscator;import
com.google.android.vending.licensing.LicenseChecker;import
com.google.android.vending.licensing.LicenseCheckerCallback;import
com.google.android.vending.licensing.Policy;import
com.google.android.vending.licensing.ServerManagedPolicy;
public class MainActivity extends Activity {
String tag = "LICENSE: ";
private static final String BASE64_PUBLIC_KEY = "MY_KEY_REMOVED";
// Generate your own 20 random bytes, and put them here.
private static final byte[] SALT = new byte[] {
-46, 65, 30, -128, -103, -57, 74, -64, 51, 88, -95, -45, 77, -117,
-36, -113, -11, 32, -64,
89
};
private TextView mStatusText;
private Button mCheckLicenseButton;
private LicenseCheckerCallback mLicenseCheckerCallback;
private LicenseChecker mChecker;
// A handler on the UI thread.
private Handler mHandler;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.i(tag, "Just in onCreate method.");
mStatusText = (TextView) findViewById(R.id.status_text);
mCheckLicenseButton = (Button) findViewById(R.id.check_license_button);
mCheckLicenseButton.setOnClickListener(new View.OnClickListener() {
public void onClick(View view) {
doCheck();
}
});
mHandler = new Handler();
Log.i(tag, "Just set mHandler to new Handler.");
// Try to use more data here. ANDROID_ID is a single point of attack.
String deviceId = Settings.Secure.getString(getContentResolver(),
Settings.Secure.ANDROID_ID);
// Library calls this when it's done.
Log.i(tag, "Setting new mLicenseCheckerCallback");
mLicenseCheckerCallback = new MyLicenseCheckerCallback();
// Construct the LicenseChecker with a policy.
Log.i(tag, "Setting mChecker variable.");
mChecker = new LicenseChecker(
this, new ServerManagedPolicy(this,
new AESObfuscator(SALT, getPackageName(), deviceId)),
BASE64_PUBLIC_KEY);
doCheck();
}
protected Dialog onCreateDialog(int id) {
final boolean bRetry = id == 1;
return new AlertDialog.Builder(this)
.setTitle(R.string.unlicensed_dialog_title)
.setMessage(bRetry ? R.string.unlicensed_dialog_retry_body :
R.string.unlicensed_dialog_body)
.setPositiveButton(bRetry ? R.string.retry_button :
R.string.buy_button, new DialogInterface.OnClickListener() {
boolean mRetry = bRetry;
public void onClick(DialogInterface dialog, int which) {
if ( mRetry ) {
doCheck();
} else {
Intent marketIntent = new
Intent(Intent.ACTION_VIEW, Uri.parse(
"http://market.android.com/details?id="; +
getPackageName()));
startActivity(marketIntent);
}
}
})
.setNegativeButton(R.string.quit_button, new
DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
finish();
}
}).create();
}
private void doCheck() {
mCheckLicenseButton.setEnabled(false);
setProgressBarIndeterminateVisibility(true);
mStatusText.setText(R.string.checking_license);
mChecker.checkAccess(mLicenseCheckerCallback);
}
private void displayResult(final String result) {
mHandler.post(new Runnable() {
public void run() {
mStatusText.setText(result);
setProgressBarIndeterminateVisibility(false);
mCheckLicenseButton.setEnabled(true);
}
});
}
private void displayDialog(final boolean showRetry) {
mHandler.post(new Runnable() {
public void run() {
setProgressBarIndeterminateVisibility(false);
showDialog(showRetry ? 1 : 0);
mCheckLicenseButton.setEnabled(true);
}
});
}
private class MyLicenseCheckerCallback implements LicenseCheckerCallback {
public void allow(int policyReason) {
if (isFinishing()) {
// Don't update UI if Activity is finishing.
return;
}
// Should allow user access.
displayResult(getString(R.string.allow));
}
public void dontAllow(int policyReason) {
if (isFinishing()) {
// Don't update UI if Activity is finishing.
return;
}
displayResult(getString(R.string.dont_allow));
// Should not allow access. In most cases, the app should assume
// the user has access unless it encounters this. If it does,
// the app should inform the user of their unlicensed ways
// and then either shut down the app or limit the user to a
// restricted set of features.
// In this example, we show a dialog that takes the user to Market.
// If the reason for the lack of license is that the service is
// unavailable or there is another problem, we display a
// retry button on the dialog and a different message.
displayDialog(policyReason == Policy.RETRY);
}
public void applicationError(int errorCode) {
if (isFinishing()) {
// Don't update UI if Activity is finishing.
return;
}
// This is a polite way of saying the developer made a mistake
// while setting up or calling the license checker library.
// Please examine the error code and fix the error.
String result =
String.format(getString(R.string.application_error), errorCode);
displayResult(result);
}
}
@Override
protected void onDestroy() {
super.onDestroy();
mChecker.onDestroy();
}
}
Any assistance in helping me get this resolved would be greatly appreciated.
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