Java tutorial
/* * Copyright (C) 2013-2014 Dominik Schrmann <dominik@dominikschuermann.de> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package org.sufficientlysecure.keychain.service.remote; import android.content.pm.ApplicationInfo; import android.content.pm.PackageManager; import android.content.pm.PackageManager.NameNotFoundException; import android.graphics.drawable.Drawable; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemSelectedListener; import android.widget.ImageView; import android.widget.Spinner; import android.widget.TextView; import org.spongycastle.util.encoders.Hex; import org.sufficientlysecure.keychain.Constants; import org.sufficientlysecure.keychain.R; import org.sufficientlysecure.keychain.ui.SelectSecretKeyLayoutFragment; import org.sufficientlysecure.keychain.ui.adapter.KeyValueSpinnerAdapter; import org.sufficientlysecure.keychain.util.AlgorithmNames; import org.sufficientlysecure.keychain.util.Log; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; public class AppSettingsFragment extends Fragment implements SelectSecretKeyLayoutFragment.SelectSecretKeyCallback { // model private AppSettings mAppSettings; // view private TextView mAppNameView; private ImageView mAppIconView; private Spinner mEncryptionAlgorithm; private Spinner mHashAlgorithm; private Spinner mCompression; private TextView mPackageName; private TextView mPackageSignature; private SelectSecretKeyLayoutFragment mSelectKeyFragment; KeyValueSpinnerAdapter mEncryptionAdapter; KeyValueSpinnerAdapter mHashAdapter; KeyValueSpinnerAdapter mCompressionAdapter; public AppSettings getAppSettings() { return mAppSettings; } public void setAppSettings(AppSettings appSettings) { this.mAppSettings = appSettings; setPackage(appSettings.getPackageName()); mPackageName.setText(appSettings.getPackageName()); try { MessageDigest md = MessageDigest.getInstance("SHA-256"); md.update(appSettings.getPackageSignature()); byte[] digest = md.digest(); String signature = new String(Hex.encode(digest)); mPackageSignature.setText(signature); } catch (NoSuchAlgorithmException e) { Log.e(Constants.TAG, "Should not happen!", e); } mSelectKeyFragment.selectKey(appSettings.getKeyId()); mEncryptionAlgorithm.setSelection(mEncryptionAdapter.getPosition(appSettings.getEncryptionAlgorithm())); mHashAlgorithm.setSelection(mHashAdapter.getPosition(appSettings.getHashAlgorithm())); mCompression.setSelection(mCompressionAdapter.getPosition(appSettings.getCompression())); } /** * Inflate the layout for this fragment */ @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.api_app_settings_fragment, container, false); initView(view); return view; } /** * Set error String on key selection * * @param error */ public void setErrorOnSelectKeyFragment(String error) { mSelectKeyFragment.setError(error); } private void initView(View view) { mSelectKeyFragment = (SelectSecretKeyLayoutFragment) getFragmentManager() .findFragmentById(R.id.api_app_settings_select_key_fragment); mSelectKeyFragment.setCallback(this); mAppNameView = (TextView) view.findViewById(R.id.api_app_settings_app_name); mAppIconView = (ImageView) view.findViewById(R.id.api_app_settings_app_icon); mEncryptionAlgorithm = (Spinner) view.findViewById(R.id.api_app_settings_encryption_algorithm); mHashAlgorithm = (Spinner) view.findViewById(R.id.api_app_settings_hash_algorithm); mCompression = (Spinner) view.findViewById(R.id.api_app_settings_compression); mPackageName = (TextView) view.findViewById(R.id.api_app_settings_package_name); mPackageSignature = (TextView) view.findViewById(R.id.api_app_settings_package_signature); AlgorithmNames algorithmNames = new AlgorithmNames(getActivity()); mEncryptionAdapter = new KeyValueSpinnerAdapter(getActivity(), algorithmNames.getEncryptionNames()); mEncryptionAlgorithm.setAdapter(mEncryptionAdapter); mEncryptionAlgorithm.setOnItemSelectedListener(new OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { mAppSettings.setEncryptionAlgorithm((int) id); } @Override public void onNothingSelected(AdapterView<?> parent) { } }); mHashAdapter = new KeyValueSpinnerAdapter(getActivity(), algorithmNames.getHashNames()); mHashAlgorithm.setAdapter(mHashAdapter); mHashAlgorithm.setOnItemSelectedListener(new OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { mAppSettings.setHashAlgorithm((int) id); } @Override public void onNothingSelected(AdapterView<?> parent) { } }); mCompressionAdapter = new KeyValueSpinnerAdapter(getActivity(), algorithmNames.getCompressionNames()); mCompression.setAdapter(mCompressionAdapter); mCompression.setOnItemSelectedListener(new OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { mAppSettings.setCompression((int) id); } @Override public void onNothingSelected(AdapterView<?> parent) { } }); } private void setPackage(String packageName) { PackageManager pm = getActivity().getApplicationContext().getPackageManager(); // get application name and icon from package manager String appName = null; Drawable appIcon = null; try { ApplicationInfo ai = pm.getApplicationInfo(packageName, 0); appName = (String) pm.getApplicationLabel(ai); appIcon = pm.getApplicationIcon(ai); } catch (final NameNotFoundException e) { // fallback appName = packageName; } mAppNameView.setText(appName); mAppIconView.setImageDrawable(appIcon); } /** * callback from select secret key fragment */ @Override public void onKeySelected(long secretKeyId) { mAppSettings.setKeyId(secretKeyId); } }