/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.pyload.android.client.module;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.SharedPreferences;
import java.io.IOException;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.Closeable;
import org.pyload.android.client.R;
/**
* Displays an EULA ("End User License Agreement") that the user has to accept before
* using the application. Your application should call {@link Eula#show(android.app.Activity)}
* in the onCreate() method of the first activity. If the user accepts the EULA, it will never
* be shown again. If the user refuses, {@link android.app.Activity#finish()} is invoked
* on your activity.
*/
public class Eula {
private static final String ASSET_EULA = "EULA";
private static final String PREFERENCE_EULA_ACCEPTED = "eula.accepted";
private static final String PREFERENCES_EULA = "eula";
/**
* callback to let the activity know when the user has accepted the EULA.
*/
static interface OnEulaAgreedTo {
/**
* Called when the user has accepted the eula and the dialog closes.
*/
void onEulaAgreedTo();
}
/**
* Displays the EULA if necessary. This method should be called from the onCreate()
* method of your main Activity.
*
* @param activity The Activity to finish if the user rejects the EULA.
* @return Whether the user has agreed already.
*/
public static boolean show(final Activity activity) {
final SharedPreferences preferences = activity.getSharedPreferences(PREFERENCES_EULA,
Activity.MODE_PRIVATE);
if (!preferences.getBoolean(PREFERENCE_EULA_ACCEPTED, false)) {
final AlertDialog.Builder builder = new AlertDialog.Builder(activity);
builder.setTitle(R.string.eula_title);
builder.setCancelable(true);
builder.setPositiveButton(R.string.eula_accept, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
accept(preferences);
if (activity instanceof OnEulaAgreedTo) {
((OnEulaAgreedTo) activity).onEulaAgreedTo();
}
}
});
builder.setNegativeButton(R.string.eula_refuse, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
refuse(activity);
}
});
builder.setOnCancelListener(new DialogInterface.OnCancelListener() {
public void onCancel(DialogInterface dialog) {
refuse(activity);
}
});
builder.setMessage(readEula(activity));
builder.create().show();
return false;
}
return true;
}
private static void accept(SharedPreferences preferences) {
preferences.edit().putBoolean(PREFERENCE_EULA_ACCEPTED, true).commit();
}
private static void refuse(Activity activity) {
activity.finish();
}
private static CharSequence readEula(Activity activity) {
BufferedReader in = null;
try {
in = new BufferedReader(new InputStreamReader(activity.getAssets().open(ASSET_EULA)));
String line;
StringBuilder buffer = new StringBuilder();
while ((line = in.readLine()) != null) buffer.append(line).append('\n');
return buffer;
} catch (IOException e) {
return "";
} finally {
closeStream(in);
}
}
/**
* Closes the specified stream.
*
* @param stream The stream to close.
*/
private static void closeStream(Closeable stream) {
if (stream != null) {
try {
stream.close();
} catch (IOException e) {
// Ignore
}
}
}
}