Java tutorial
/* * Copyright (C) 2017 Vincent Breitmoser <look@my.amazin.horse> * * 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.ui.transfer.view; import android.app.Activity; import android.content.BroadcastReceiver; import android.content.Context; import android.content.DialogInterface; import android.content.DialogInterface.OnDismissListener; import android.content.Intent; import android.content.IntentFilter; import android.graphics.Bitmap; import android.net.NetworkInfo; import android.net.Uri; import android.net.wifi.WifiManager; import android.os.Build.VERSION_CODES; import android.os.Bundle; import android.os.Parcelable; import android.support.annotation.Nullable; import android.support.annotation.RequiresApi; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentManager.OnBackStackChangedListener; import android.support.v7.app.AlertDialog; import android.support.v7.app.AlertDialog.Builder; import android.support.v7.widget.RecyclerView; import android.support.v7.widget.RecyclerView.Adapter; import android.text.TextUtils; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.view.ViewTreeObserver.OnGlobalLayoutListener; import android.widget.ImageView; import android.widget.TextView; import com.google.zxing.client.android.Intents; import org.sufficientlysecure.keychain.R; import org.sufficientlysecure.keychain.operations.results.ImportKeyResult; import org.sufficientlysecure.keychain.operations.results.OperationResult; import org.sufficientlysecure.keychain.ui.MainActivity; import org.sufficientlysecure.keychain.ui.QrCodeCaptureActivity; import org.sufficientlysecure.keychain.ui.base.CryptoOperationHelper; import org.sufficientlysecure.keychain.ui.base.CryptoOperationHelper.Callback; import org.sufficientlysecure.keychain.ui.transfer.presenter.TransferPresenter; import org.sufficientlysecure.keychain.ui.transfer.presenter.TransferPresenter.TransferMvpView; import org.sufficientlysecure.keychain.ui.util.Notify; import org.sufficientlysecure.keychain.ui.util.Notify.Style; import org.sufficientlysecure.keychain.ui.widget.ConnectionStatusView; import org.sufficientlysecure.keychain.ui.widget.ToolableViewAnimator; @RequiresApi(api = VERSION_CODES.LOLLIPOP) public class TransferFragment extends Fragment implements TransferMvpView { public static final int REQUEST_CODE_SCAN = 1; public static final int LOADER_ID = 1; public static final String EXTRA_OPENPGP_SKT_INFO = "openpgp_skt_info"; private ImageView vQrCodeImage; private TransferPresenter presenter; private ToolableViewAnimator vTransferAnimator; private TextView vConnectionStatusText1; private TextView vConnectionStatusText2; private ConnectionStatusView vConnectionStatusView1; private ConnectionStatusView vConnectionStatusView2; private RecyclerView vTransferKeyList; private View vTransferKeyListEmptyView; private RecyclerView vReceivedKeyList; private CryptoOperationHelper currentCryptoOperationHelper; private BroadcastReceiver broadcastReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { if (WifiManager.NETWORK_STATE_CHANGED_ACTION.equals(intent.getAction())) { NetworkInfo networkInfo = intent.getParcelableExtra(WifiManager.EXTRA_NETWORK_INFO); if (networkInfo != null && networkInfo.isConnected()) { presenter.onWifiConnected(); } } } }; private boolean showDoneIcon; private AlertDialog confirmationDialog; private TextView vWifiErrorInstructions; @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View view = inflater.inflate(R.layout.transfer_fragment, container, false); vTransferAnimator = (ToolableViewAnimator) view.findViewById(R.id.transfer_animator); vConnectionStatusText1 = (TextView) view.findViewById(R.id.connection_status_1); vConnectionStatusText2 = (TextView) view.findViewById(R.id.connection_status_2); vConnectionStatusView1 = (ConnectionStatusView) view.findViewById(R.id.connection_status_icon_1); vConnectionStatusView2 = (ConnectionStatusView) view.findViewById(R.id.connection_status_icon_2); vTransferKeyList = (RecyclerView) view.findViewById(R.id.transfer_key_list); vTransferKeyListEmptyView = view.findViewById(R.id.transfer_key_list_empty); vReceivedKeyList = (RecyclerView) view.findViewById(R.id.received_key_list); vWifiErrorInstructions = (TextView) view.findViewById(R.id.transfer_wifi_error_instructions); vQrCodeImage = (ImageView) view.findViewById(R.id.qr_code_image); view.findViewById(R.id.button_scan).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if (presenter != null) { presenter.onUiClickScan(); } } }); view.findViewById(R.id.button_scan_again).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if (presenter != null) { presenter.onUiClickScanAgain(); } } }); presenter = new TransferPresenter(getContext(), getLoaderManager(), LOADER_ID, this); setHasOptionsMenu(true); return view; } @Override public void onActivityCreated(@Nullable Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); if (savedInstanceState != null) { return; } Intent activityIntent = getActivity().getIntent(); if (activityIntent != null && activityIntent.hasExtra(EXTRA_OPENPGP_SKT_INFO)) { presenter.onUiInitFromIntentUri(activityIntent.<Uri>getParcelableExtra(EXTRA_OPENPGP_SKT_INFO)); } } @Override public void onStart() { super.onStart(); presenter.onUiStart(); } @Override public void onResume() { super.onResume(); IntentFilter intentFilter = new IntentFilter(); intentFilter.addAction(WifiManager.NETWORK_STATE_CHANGED_ACTION); getContext().registerReceiver(broadcastReceiver, intentFilter); } @Override public void onPause() { super.onPause(); getContext().unregisterReceiver(broadcastReceiver); } @Override public void onStop() { super.onStop(); presenter.onUiStop(); } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { if (showDoneIcon) { inflater.inflate(R.menu.transfer_menu, menu); } } @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId() == R.id.menu_done) { presenter.onUiClickDone(); return true; } return false; } @Override public void showNotOnWifi() { vTransferAnimator.setDisplayedChildId(R.id.transfer_layout_no_wifi); } @Override public void showWaitingForConnection() { vTransferAnimator.setDisplayedChildId(R.id.transfer_layout_waiting); } @Override public void showEstablishingConnection() { vTransferAnimator.setDisplayedChildId(R.id.transfer_layout_connecting); } @Override public void showConnectionEstablished(String hostname) { // String statusText = getString(R.string.transfer_status_connected, hostname); vConnectionStatusText1.setText(R.string.transfer_status_connected); vConnectionStatusText2.setText(R.string.transfer_status_connected); vConnectionStatusView1.setConnected(true); vConnectionStatusView2.setConnected(true); vTransferAnimator.setDisplayedChildId(R.id.transfer_layout_connected); } @Override public void showWifiError(String wifiSsid) { vTransferAnimator.setDisplayedChildId(R.id.transfer_layout_wifi_error); if (!TextUtils.isEmpty(wifiSsid)) { vWifiErrorInstructions.setText( getResources().getString(R.string.transfer_error_wifi_text_instructions_ssid, wifiSsid)); } else { vWifiErrorInstructions.setText(R.string.transfer_error_wifi_text_instructions); } } @Override public void showReceivingKeys() { vTransferAnimator.setDisplayedChildId(R.id.transfer_layout_passive); } @Override public void showViewDisconnected() { vConnectionStatusText1.setText(R.string.transfer_status_disconnected); vConnectionStatusText2.setText(R.string.transfer_status_disconnected); vConnectionStatusView1.setConnected(false); vConnectionStatusView2.setConnected(false); } @Override public void setQrImage(final Bitmap qrCode) { vQrCodeImage.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() { @Override public void onGlobalLayout() { int viewSize = vQrCodeImage.getWidth(); if (viewSize == 0) { return; } // create actual bitmap in display dimensions Bitmap scaled = Bitmap.createScaledBitmap(qrCode, viewSize, viewSize, false); vQrCodeImage.setImageBitmap(scaled); } }); vQrCodeImage.requestLayout(); } @Override public void scanQrCode() { Intent intent = new Intent(getActivity(), QrCodeCaptureActivity.class); startActivityForResult(intent, REQUEST_CODE_SCAN); } @Override public void setShowDoneIcon(boolean showDoneIcon) { this.showDoneIcon = showDoneIcon; FragmentActivity activity = getActivity(); if (activity != null) { activity.invalidateOptionsMenu(); } } @Override public void setSecretKeyAdapter(Adapter adapter) { vTransferKeyList.setAdapter(adapter); } @Override public void setShowSecretKeyEmptyView(boolean isEmpty) { vTransferKeyListEmptyView.setVisibility(isEmpty ? View.VISIBLE : View.GONE); } @Override public void setReceivedKeyAdapter(Adapter adapter) { vReceivedKeyList.setAdapter(adapter); } @Override public <T extends Parcelable, S extends OperationResult> CryptoOperationHelper<T, S> createCryptoOperationHelper( Callback<T, S> callback) { CryptoOperationHelper<T, S> cryptoOperationHelper = new CryptoOperationHelper<>(1, this, callback, null); currentCryptoOperationHelper = cryptoOperationHelper; return cryptoOperationHelper; } @Override public void releaseCryptoOperationHelper() { currentCryptoOperationHelper = null; } @Override public void showErrorBadKey() { Notify.create(getActivity(), R.string.transfer_error_read_incoming, Style.ERROR).show(); } @Override public void showErrorConnectionFailed() { Notify.create(getActivity(), R.string.transfer_error_connect, Style.ERROR).show(); } @Override public void showErrorListenFailed() { Notify.create(getActivity(), R.string.transfer_error_listen, Style.ERROR).show(); } @Override public void showErrorConnectionError(String errorMessage) { if (errorMessage != null) { String text = getString(R.string.transfer_error_generic_msg, errorMessage); Notify.create(getActivity(), text, Style.ERROR).show(); } else { Notify.create(getActivity(), R.string.transfer_error_generic, Style.ERROR).show(); } } @Override public void showResultNotification(ImportKeyResult result) { result.createNotify(getActivity()).show(); } @Override public void addFakeBackStackItem(final String tag) { FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction().addToBackStack(tag).commitAllowingStateLoss(); fragmentManager.executePendingTransactions(); fragmentManager.addOnBackStackChangedListener(new OnBackStackChangedListener() { @Override public void onBackStackChanged() { FragmentManager fragMan = getFragmentManager(); fragMan.popBackStack(tag, FragmentManager.POP_BACK_STACK_INCLUSIVE); fragMan.removeOnBackStackChangedListener(this); presenter.onUiBackStackPop(); } }); } @Override public void finishFragmentOrActivity() { FragmentActivity activity = getActivity(); if (activity != null) { if (activity instanceof MainActivity) { ((MainActivity) activity).onKeysSelected(); } else { activity.finish(); } } } @Override public void showConfirmSendDialog() { if (confirmationDialog != null) { return; } confirmationDialog = new Builder(getContext()).setTitle(R.string.transfer_confirm_title) .setMessage(R.string.transfer_confirm_text) .setPositiveButton(R.string.transfer_confirm_ok, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { if (whichButton == DialogInterface.BUTTON_POSITIVE) { presenter.onUiClickConfirmSend(); } else { dialog.dismiss(); } } }).setNegativeButton(R.string.transfer_confirm_cancel, null) .setOnDismissListener(new OnDismissListener() { @Override public void onDismiss(DialogInterface dialog) { confirmationDialog = null; } }).create(); confirmationDialog.show(); } @Override public void dismissConfirmationIfExists() { if (confirmationDialog != null && confirmationDialog.isShowing()) { confirmationDialog.dismiss(); } } @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { if (currentCryptoOperationHelper != null && currentCryptoOperationHelper.handleActivityResult(requestCode, resultCode, data)) { return; } switch (requestCode) { case REQUEST_CODE_SCAN: if (resultCode == Activity.RESULT_OK) { String qrCodeData = data.getStringExtra(Intents.Scan.RESULT); presenter.onUiQrCodeScanned(qrCodeData); } break; default: super.onActivityResult(requestCode, resultCode, data); } } }