Java tutorial
/* * Copyright (C) 2016 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.chromium.latency.walt; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.os.Handler; import android.support.annotation.NonNull; import android.support.v4.app.Fragment; import android.text.method.ScrollingMovementMethod; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; import java.io.FileWriter; import java.io.IOException; import java.util.Iterator; public class AutoRunFragment extends Fragment { static final String TEST_ACTION = "org.chromium.latency.walt.START_TEST"; static final String MODE_COLD = "Cold"; private WaltDevice waltDevice; private AudioTest toTearDown; // TODO: figure out a better way to destroy the engine Handler handler = new Handler(); private class AudioResultHandler implements ResultHandler { private FileWriter fileWriter; AudioResultHandler(String fileName) throws IOException { fileWriter = new FileWriter(fileName); } @Override public void onResult(Iterable[] results) { if (results.length == 0) { logger.log("Can't write empty data!"); return; } logger.log("Writing data file"); Iterator its[] = new Iterator[results.length]; for (int i = 0; i < results.length; i++) { its[i] = results[i].iterator(); } try { while (its[0].hasNext()) { for (Iterator it : its) { if (it.hasNext()) { fileWriter.write(it.next().toString() + ","); } } fileWriter.write("\n"); } } catch (IOException e) { logger.log("Error writing output file: " + e.getMessage()); } finally { try { fileWriter.close(); } catch (IOException e) { logger.log("Error closing output file: " + e.getMessage()); } } } } private void doTest(@NonNull Bundle args) { final int reps = args.getInt("Reps", 10); String fileName = args.getString("FileName", null); ResultHandler r = null; if (fileName != null) { try { r = new AudioResultHandler(fileName); } catch (IOException e) { logger.log("Unable to open output file " + e.getMessage()); return; } } final String mode = args.getString("Mode", ""); final ResultHandler resultHandler = r; Runnable testRunnable = null; switch (args.getString("TestType", "")) { case "MidiIn": { testRunnable = new Runnable() { @Override public void run() { MidiTest midiTest = new MidiTest(getContext(), resultHandler); midiTest.setInputRepetitions(reps); midiTest.testMidiIn(); } }; break; } case "MidiOut": { testRunnable = new Runnable() { @Override public void run() { MidiTest midiTest = new MidiTest(getContext(), resultHandler); midiTest.setOutputRepetitions(reps); midiTest.testMidiOut(); } }; break; } case "AudioIn": { testRunnable = new Runnable() { @Override public void run() { AudioTest audioTest = new AudioTest(getContext(), resultHandler); audioTest.setRecordingRepetitions(reps); audioTest.setAudioMode( MODE_COLD.equals(mode) ? AudioTest.AudioMode.COLD : AudioTest.AudioMode.CONTINUOUS); audioTest.beginRecordingMeasurement(); toTearDown = audioTest; } }; break; } case "AudioOut": { final int period = args.getInt("Period", -1); testRunnable = new Runnable() { @Override public void run() { AudioTest audioTest = new AudioTest(getContext(), resultHandler); audioTest.setPlaybackRepetitions(reps); audioTest.setAudioMode( MODE_COLD.equals(mode) ? AudioTest.AudioMode.COLD : AudioTest.AudioMode.CONTINUOUS); if (period > 0) { audioTest.setPeriod(period); } else { audioTest.setPeriod(MODE_COLD.equals(mode) ? AudioTest.COLD_TEST_PERIOD : AudioTest.CONTINUOUS_TEST_PERIOD); } audioTest.beginPlaybackMeasurement(); toTearDown = audioTest; } }; break; } } // Not sure we need the handler.post() here, but just in case. final Runnable finalTestRunnable = testRunnable; waltDevice.setConnectionStateListener(new WaltConnection.ConnectionStateListener() { @Override public void onConnect() { handler.post(finalTestRunnable); } @Override public void onDisconnect() { } }); } interface ResultHandler { void onResult(Iterable... r); } @Override public void onDestroyView() { if (toTearDown != null) { toTearDown.teardown(); } super.onDestroyView(); } private TextView txtLogAutoRun; private SimpleLogger logger; public AutoRunFragment() { // Required empty public constructor } private BroadcastReceiver logReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String msg = intent.getStringExtra("message"); txtLogAutoRun.append("\n" + msg); } }; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { super.onCreate(savedInstanceState); logger = SimpleLogger.getInstance(getContext()); waltDevice = WaltDevice.getInstance(getContext()); View view = inflater.inflate(R.layout.fragment_auto_run, container, false); Bundle args = getArguments(); if (args != null) { doTest(args); } return view; } @Override public void onResume() { super.onResume(); txtLogAutoRun = (TextView) getActivity().findViewById(R.id.txt_log_auto_run); txtLogAutoRun.setMovementMethod(new ScrollingMovementMethod()); txtLogAutoRun.setText(logger.getLogText()); logger.registerReceiver(logReceiver); } @Override public void onPause() { logger.unregisterReceiver(logReceiver); super.onPause(); } }