Java tutorial
/* * Copyright (C) 2012-2014 Dominik Schrmann <dominik@dominikschuermann.de> * Copyright (C) 2011 Senecaso * * 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.thialfihar.android.apg.ui; import android.app.ProgressDialog; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.os.Message; import android.os.Messenger; import android.support.v4.app.NavUtils; import android.support.v7.app.ActionBarActivity; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.widget.ArrayAdapter; import android.widget.Spinner; import android.widget.Toast; import com.beardedhen.androidbootstrap.BootstrapButton; import org.thialfihar.android.apg.Constants; import org.thialfihar.android.apg.R; import org.thialfihar.android.apg.helper.Preferences; import org.thialfihar.android.apg.provider.ApgContract; import org.thialfihar.android.apg.service.ApgIntentService; import org.thialfihar.android.apg.service.ApgIntentServiceHandler; import org.thialfihar.android.apg.util.Log; /** * Sends the selected public key to a keyserver */ public class UploadKeyActivity extends ActionBarActivity { private View mUploadButton; private Spinner mKeyserverSpinner; private Uri mDataUri; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.upload_key_activity); mUploadButton = findViewById(R.id.upload_key_action_upload); mKeyserverSpinner = (Spinner) findViewById(R.id.upload_key_keyserver); ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_spinner_item, Preferences.getPreferences(this).getKeyservers()); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); mKeyserverSpinner.setAdapter(adapter); if (adapter.getCount() > 0) { mKeyserverSpinner.setSelection(0); } else { mUploadButton.setEnabled(false); } mUploadButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { uploadKey(); } }); mDataUri = getIntent().getData(); if (mDataUri == null) { Log.e(Constants.TAG, "Intent data missing. Should be Uri of key!"); finish(); return; } } private void uploadKey() { // Send all information needed to service to upload key in other thread Intent intent = new Intent(this, ApgIntentService.class); intent.setAction(ApgIntentService.ACTION_UPLOAD_KEYRING); // set data uri as path to keyring Uri blobUri = ApgContract.KeyRingData.buildPublicKeyRingUri(mDataUri); intent.setData(blobUri); // fill values for this action Bundle data = new Bundle(); String server = (String) mKeyserverSpinner.getSelectedItem(); data.putString(ApgIntentService.UPLOAD_KEY_SERVER, server); intent.putExtra(ApgIntentService.EXTRA_DATA, data); // Message is received after uploading is done in ApgService ApgIntentServiceHandler saveHandler = new ApgIntentServiceHandler(this, getString(R.string.progress_exporting), ProgressDialog.STYLE_HORIZONTAL) { public void handleMessage(Message message) { // handle messages by standard ApgHandler first super.handleMessage(message); if (message.arg1 == ApgIntentServiceHandler.MESSAGE_OKAY) { Toast.makeText(UploadKeyActivity.this, R.string.key_send_success, Toast.LENGTH_SHORT).show(); finish(); } } }; // Create a new Messenger for the communication back Messenger messenger = new Messenger(saveHandler); intent.putExtra(ApgIntentService.EXTRA_MESSENGER, messenger); // show progress dialog saveHandler.showProgressDialog(this); // start service with intent startService(intent); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case android.R.id.home: { Intent viewIntent = NavUtils.getParentActivityIntent(this); viewIntent.setData(ApgContract.KeyRings.buildGenericKeyRingUri(mDataUri)); NavUtils.navigateUpTo(this, viewIntent); return true; } } return super.onOptionsItemSelected(item); } }