Java tutorial
/* * Copyright (C) 2015 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.Manifest; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.pm.PackageManager; import android.graphics.Color; import android.media.AudioManager; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.content.ContextCompat; import android.text.method.ScrollingMovementMethod; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.Spinner; import android.widget.TextView; import com.github.mikephil.charting.charts.LineChart; import com.github.mikephil.charting.components.Description; import com.github.mikephil.charting.components.LimitLine; import com.github.mikephil.charting.data.Entry; import com.github.mikephil.charting.data.LineData; import com.github.mikephil.charting.data.LineDataSet; import java.util.ArrayList; import java.util.List; import java.util.Locale; import static org.chromium.latency.walt.Utils.getIntPreference; /** * A simple {@link Fragment} subclass. */ public class AudioFragment extends Fragment implements View.OnClickListener, BaseTest.TestStateListener { enum AudioTestType { CONTINUOUS_PLAYBACK, CONTINUOUS_RECORDING, COLD_PLAYBACK, COLD_RECORDING, DISPLAY_WAVEFORM } private SimpleLogger logger; private TextView textView; private AudioTest audioTest; private View startButton; private View stopButton; private Spinner modeSpinner; private LineChart chart; private HistogramChart latencyChart; private View chartLayout; private static final int PERMISSION_REQUEST_RECORD_AUDIO = 1; public AudioFragment() { // Required empty public constructor } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { logger = SimpleLogger.getInstance(getContext()); audioTest = new AudioTest(getActivity()); audioTest.setTestStateListener(this); // Inflate the layout for this fragment View view = inflater.inflate(R.layout.fragment_audio, container, false); textView = (TextView) view.findViewById(R.id.txt_box_audio); textView.setMovementMethod(new ScrollingMovementMethod()); startButton = view.findViewById(R.id.button_start_audio); stopButton = view.findViewById(R.id.button_stop_audio); chartLayout = view.findViewById(R.id.chart_layout); chart = (LineChart) view.findViewById(R.id.chart); latencyChart = (HistogramChart) view.findViewById(R.id.latency_chart); view.findViewById(R.id.button_close_chart).setOnClickListener(this); enableButtons(); // Configure the audio mode spinner modeSpinner = (Spinner) view.findViewById(R.id.spinner_audio_mode); ArrayAdapter<CharSequence> modeAdapter = ArrayAdapter.createFromResource(getContext(), R.array.audio_mode_array, android.R.layout.simple_spinner_item); modeAdapter.setDropDownViewResource(R.layout.support_simple_spinner_dropdown_item); modeSpinner.setAdapter(modeAdapter); return view; } @Override public void onResume() { super.onResume(); // Register this fragment class as the listener for some button clicks startButton.setOnClickListener(this); stopButton.setOnClickListener(this); textView.setText(logger.getLogText()); logger.registerReceiver(logReceiver); } @Override public void onPause() { logger.unregisterReceiver(logReceiver); super.onPause(); } @Override public void onDestroy() { super.onDestroy(); audioTest.teardown(); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.button_start_audio: chartLayout.setVisibility(View.GONE); disableButtons(); AudioTestType testType = getSelectedTestType(); switch (testType) { case CONTINUOUS_PLAYBACK: case CONTINUOUS_RECORDING: case DISPLAY_WAVEFORM: audioTest.setAudioMode(AudioTest.AudioMode.CONTINUOUS); audioTest.setPeriod(AudioTest.CONTINUOUS_TEST_PERIOD); break; case COLD_PLAYBACK: case COLD_RECORDING: audioTest.setAudioMode(AudioTest.AudioMode.CONTINUOUS); audioTest.setPeriod(AudioTest.COLD_TEST_PERIOD); break; } if (testType == AudioTestType.DISPLAY_WAVEFORM) { // Only need to record 1 beep to display wave audioTest.setRecordingRepetitions(1); } else { audioTest.setRecordingRepetitions( getIntPreference(getContext(), R.string.preference_audio_in_reps, 5)); } if (testType == AudioTestType.CONTINUOUS_PLAYBACK || testType == AudioTestType.COLD_PLAYBACK || testType == AudioTestType.CONTINUOUS_RECORDING || testType == AudioTestType.COLD_RECORDING) { latencyChart.setVisibility(View.VISIBLE); latencyChart.clearData(); latencyChart.setLegendEnabled(false); final String description = getResources().getStringArray(R.array.audio_mode_array)[modeSpinner .getSelectedItemPosition()] + " [ms]"; latencyChart.setDescription(description); } switch (testType) { case CONTINUOUS_RECORDING: case COLD_RECORDING: case DISPLAY_WAVEFORM: attemptRecordingTest(); break; case CONTINUOUS_PLAYBACK: case COLD_PLAYBACK: // Set media volume to max AudioManager am = (AudioManager) getContext().getSystemService(Context.AUDIO_SERVICE); am.setStreamVolume(AudioManager.STREAM_MUSIC, am.getStreamMaxVolume(AudioManager.STREAM_MUSIC), 0); audioTest.beginPlaybackMeasurement(); break; } break; case R.id.button_stop_audio: audioTest.stopTest(); break; case R.id.button_close_chart: chartLayout.setVisibility(View.GONE); break; } } private AudioTestType getSelectedTestType() { return AudioTestType.values()[modeSpinner.getSelectedItemPosition()]; } private BroadcastReceiver logReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String msg = intent.getStringExtra("message"); textView.append(msg + "\n"); } }; private void attemptRecordingTest() { // first see if we already have permission to record audio int currentPermission = ContextCompat.checkSelfPermission(this.getContext(), Manifest.permission.RECORD_AUDIO); if (currentPermission == PackageManager.PERMISSION_GRANTED) { disableButtons(); audioTest.beginRecordingMeasurement(); } else { requestPermissions(new String[] { Manifest.permission.RECORD_AUDIO }, PERMISSION_REQUEST_RECORD_AUDIO); } } @Override public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) { switch (requestCode) { case PERMISSION_REQUEST_RECORD_AUDIO: if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { disableButtons(); audioTest.beginRecordingMeasurement(); } else { logger.log("Could not get permission to record audio"); } return; } } @Override public void onTestStopped() { if (getSelectedTestType() == AudioTestType.DISPLAY_WAVEFORM) { drawWaveformChart(); } else { if (!audioTest.deltas_mic.isEmpty()) { latencyChart.setLegendEnabled(true); latencyChart .setLabel(String.format(Locale.US, "Median=%.1f ms", Utils.median(audioTest.deltas_mic))); } else if (!audioTest.deltas_queue2wire.isEmpty()) { latencyChart.setLegendEnabled(true); latencyChart.setLabel( String.format(Locale.US, "Median=%.1f ms", Utils.median(audioTest.deltas_queue2wire))); } } LogUploader.uploadIfAutoEnabled(getContext()); enableButtons(); } @Override public void onTestStoppedWithError() { enableButtons(); latencyChart.setVisibility(View.GONE); } @Override public void onTestPartialResult(double value) { latencyChart.addEntry(value); } private void drawWaveformChart() { final short[] wave = AudioTest.getRecordedWave(); List<Entry> entries = new ArrayList<>(); int frameRate = audioTest.getOptimalFrameRate(); for (int i = 0; i < wave.length; i++) { float timeStamp = (float) i / frameRate * 1000f; entries.add(new Entry(timeStamp, (float) wave[i])); } LineDataSet dataSet = new LineDataSet(entries, "Waveform"); dataSet.setColor(Color.BLACK); dataSet.setValueTextColor(Color.BLACK); dataSet.setCircleColor(ContextCompat.getColor(getContext(), R.color.DarkGreen)); dataSet.setCircleRadius(1.5f); dataSet.setCircleColorHole(Color.DKGRAY); LineData lineData = new LineData(dataSet); chart.setData(lineData); LimitLine line = new LimitLine(audioTest.getThreshold(), "Threshold"); line.setLineColor(Color.RED); line.setLabelPosition(LimitLine.LimitLabelPosition.LEFT_TOP); line.setLineWidth(2f); line.setTextColor(Color.DKGRAY); line.setTextSize(10f); chart.getAxisLeft().addLimitLine(line); final Description desc = new Description(); desc.setText("Wave [digital level -32768 to +32767] vs. Time [ms]"); desc.setTextSize(12f); chart.setDescription(desc); chart.getLegend().setEnabled(false); chart.invalidate(); chartLayout.setVisibility(View.VISIBLE); } private void disableButtons() { startButton.setEnabled(false); stopButton.setEnabled(true); } private void enableButtons() { startButton.setEnabled(true); stopButton.setEnabled(false); } }