MidiSinthDeviceService.java<\/p>\n\n\n\n
\/*\n * Copyright (C) 2015 The Android Open Source Project\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http:\/\/www.apache.org\/licenses\/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n *\/\n\npackage com.example.android.midisynth;\n\nimport android.media.midi.MidiDeviceService;\nimport android.media.midi.MidiDeviceStatus;\nimport android.media.midi.MidiReceiver;\n\nimport com.example.android.common.midi.synth.SynthEngine;\n\npublic class MidiSynthDeviceService extends MidiDeviceService {\n\n private SynthEngine mSynthEngine = new SynthEngine();\n private boolean mSynthStarted = false;\n\n @Override\n public void onCreate() {\n super.onCreate();\n }\n\n @Override\n public void onDestroy() {\n mSynthEngine.stop();\n super.onDestroy();\n }\n\n @Override\n public MidiReceiver[] onGetInputPortReceivers() {\n return new MidiReceiver[]{mSynthEngine};\n }\n\n \/**\n * This will get called when clients connect or disconnect.\n *\/\n @Override\n public void onDeviceStatusChanged(MidiDeviceStatus status) {\n if (status.isInputPortOpen(0) && !mSynthStarted) {\n mSynthEngine.start();\n mSynthStarted = true;\n } else if (!status.isInputPortOpen(0) && mSynthStarted) {\n mSynthEngine.stop();\n mSynthStarted = false;\n }\n }\n\n}<\/code><\/pre>\n\n\n\n
\n\n\n\nMainActivity.java<\/p>\n\n\n\n
\/*\n * Copyright (C) 2015 The Android Open Source Project\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http:\/\/www.apache.org\/licenses\/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n *\/\n\npackage com.example.android.midisynth;\n\nimport android.content.pm.PackageManager;\nimport android.media.midi.MidiDevice.MidiConnection;\nimport android.media.midi.MidiDeviceInfo;\nimport android.media.midi.MidiManager;\nimport android.os.Bundle;\nimport android.support.v7.app.ActionBar;\nimport android.support.v7.app.AppCompatActivity;\nimport android.support.v7.widget.Toolbar;\nimport android.view.Menu;\nimport android.view.MenuItem;\nimport android.view.WindowManager;\nimport android.widget.Toast;\n\nimport com.example.android.common.midi.MidiOutputPortConnectionSelector;\nimport com.example.android.common.midi.MidiPortConnector;\nimport com.example.android.common.midi.MidiTools;\n\n\/**\n * Simple synthesizer as a MIDI Device.\n *\/\npublic class MainActivity extends AppCompatActivity {\n\n private MidiOutputPortConnectionSelector mPortSelector;\n\n @Override\n public void onCreate(Bundle savedInstanceState) {\n super.onCreate(savedInstanceState);\n setContentView(R.layout.main);\n setSupportActionBar((Toolbar) findViewById(R.id.toolbar));\n ActionBar actionBar = getSupportActionBar();\n if (actionBar != null) {\n actionBar.setDisplayShowTitleEnabled(false);\n }\n\n if (getPackageManager().hasSystemFeature(PackageManager.FEATURE_MIDI)) {\n setupMidi();\n }\n }\n\n @Override\n public boolean onCreateOptionsMenu(Menu menu) {\n getMenuInflater().inflate(R.menu.main, menu);\n setKeepScreenOn(menu.findItem(R.id.action_keep_screen_on).isChecked());\n return true;\n }\n\n @Override\n public boolean onOptionsItemSelected(MenuItem item) {\n switch (item.getItemId()) {\n case R.id.action_keep_screen_on:\n boolean checked = !item.isChecked();\n setKeepScreenOn(checked);\n item.setChecked(checked);\n break;\n }\n return super.onOptionsItemSelected(item);\n }\n\n private void setKeepScreenOn(boolean keepScreenOn) {\n if (keepScreenOn) {\n getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);\n } else {\n getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);\n }\n }\n\n private void setupMidi() {\n \/\/ Setup MIDI\n MidiManager midiManager = (MidiManager) getSystemService(MIDI_SERVICE);\n\n MidiDeviceInfo synthInfo = MidiTools.findDevice(midiManager, \"AndroidTest\",\n \"SynthExample\");\n int portIndex = 0;\n mPortSelector = new MidiOutputPortConnectionSelector(midiManager, this,\n R.id.spinner_synth_sender, synthInfo, portIndex);\n mPortSelector.setConnectedListener(new MyPortsConnectedListener());\n }\n\n private void closeSynthResources() {\n if (mPortSelector != null) {\n mPortSelector.close();\n }\n }\n\n \/\/ TODO A better way would be to listen to the synth server\n \/\/ for open\/close events and then disable\/enable the spinner.\n private class MyPortsConnectedListener\n implements MidiPortConnector.OnPortsConnectedListener {\n @Override\n public void onPortsConnected(final MidiConnection connection) {\n runOnUiThread(new Runnable() {\n @Override\n public void run() {\n if (connection == null) {\n Toast.makeText(MainActivity.this,\n R.string.error_port_busy, Toast.LENGTH_SHORT)\n .show();\n mPortSelector.clearSelection();\n } else {\n Toast.makeText(MainActivity.this,\n R.string.port_open_ok, Toast.LENGTH_SHORT)\n .show();\n }\n }\n });\n }\n }\n\n @Override\n public void onDestroy() {\n closeSynthResources();\n super.onDestroy();\n }\n\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"MidiSinthDeviceService.java 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