Java tutorial
/* * Copyright (C) 2014 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 xqs; import android.app.ActionBar; import android.app.Activity; import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothDevice; import android.content.Intent; import android.hardware.usb.UsbDevice; import android.hardware.usb.UsbManager; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.support.annotation.Nullable; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.Button; import android.widget.CheckBox; import android.widget.SeekBar; import android.widget.TextView; import android.widget.Toast; import com.example.android.bluetoothchat.BluetoothService; import com.example.android.bluetoothchat.Constants; import com.example.android.bluetoothchat.DeviceListActivity; import com.example.android.bluetoothchat.R; import com.example.android.common.logger.Log; import xqs.joystick.robotcar.Driver; import xqs.joystick.robotcar.JoystickDriver; /** * This fragment controls Bluetooth to communicate with other devices. */ public class JoystickFragment extends Fragment { private static final String TAG = "JoystickFragment"; // Intent request codes private static final int REQUEST_CONNECT_DEVICE_SECURE = 1; private static final int REQUEST_CONNECT_DEVICE_INSECURE = 2; private static final int REQUEST_ENABLE_BT = 3; // Layout Views // private ListView mConversationView; // private EditText mOutEditText; // private Button mSendButton; /** * Name of the connected device */ private String mConnectedDeviceName = null; /** * Array adapter for the conversation thread */ // private ArrayAdapter<String> mConversationArrayAdapter; /** * String buffer for outgoing messages */ // private StringBuffer mOutStringBuffer; /** * Local Bluetooth adapter */ private BluetoothAdapter mBluetoothAdapter = null; /** * Member object for the chat services */ private BluetoothService mChatService = null; private SeekBar mFSJGSeekBar; private SeekBar mKZSUSeekBar; private SeekBar mMZSDSeekBar; private SeekBar mJJSDSeekBar; private TextView mFSSJTextView; private TextView mKZSUTextView; private TextView mMZSDTextView; private TextView mJJSDTextView; private Button mStartButton; private Button mStopButton; private CheckBox mXFZCheckBox; private CheckBox mYFZCheckBox; private JoystickDriver mJoystickDriver; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setHasOptionsMenu(true); // Get local Bluetooth adapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); // If the adapter is null, then Bluetooth is not supported if (mBluetoothAdapter == null) { FragmentActivity activity = getActivity(); Toast.makeText(activity, "Bluetooth is not available", Toast.LENGTH_LONG).show(); activity.finish(); } mJoystickDriver = JoystickDriver.getInstance(mJoystickCallBack.getUsbManager(), mJoystickCallBack.getUsbDevice(), mDriver); } private Driver mDriver = new Driver() { @Override public void receiveCmd(byte[] cmd) { //FIXME ?FC? if (mChatService.getState() == BluetoothService.STATE_CONNECTED) sendMessage(cmd); } }; @Override public void onStart() { super.onStart(); // If BT is not on, request that it be enabled. // setupChat() will then be called during onActivityResult if (!mBluetoothAdapter.isEnabled()) { Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); startActivityForResult(enableIntent, REQUEST_ENABLE_BT); // Otherwise, setup the chat session } else if (mChatService == null) { setupChat(); } } @Override public void onDestroy() { super.onDestroy(); if (mChatService != null) { mChatService.stop(); } } @Override public void onResume() { super.onResume(); // Performing this check in onResume() covers the case in which BT was // not enabled during onStart(), so we were paused to enable it... // onResume() will be called when ACTION_REQUEST_ENABLE activity returns. if (mChatService != null) { // Only if the state is STATE_NONE, do we know that we haven't started already if (mChatService.getState() == BluetoothService.STATE_NONE) { // Start the Bluetooth chat services mChatService.start(); } } } @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { return inflater.inflate(R.layout.fragment_joystik, container, false); } @Override public void onViewCreated(View view, @Nullable Bundle savedInstanceState) { // mConversationView = (ListView) view.findViewById(R.id.in); // mOutEditText = (EditText) view.findViewById(R.id.edit_text_out); // mSendButton = (Button) view.findViewById(R.id.button_send); mFSJGSeekBar = (SeekBar) view.findViewById(R.id.fasongjiange); mFSJGSeekBar.setMax(50); mFSJGSeekBar.setProgress(25); mFSJGSeekBar.setOnSeekBarChangeListener(mOnSeekBarChangedListener); mFSSJTextView = (TextView) view.findViewById(R.id.text_fsjg); mKZSUSeekBar = (SeekBar) view.findViewById(R.id.kuaizhuansudu); mKZSUSeekBar.setMax(40); mKZSUSeekBar.setProgress(20); mKZSUSeekBar.setOnSeekBarChangeListener(mOnSeekBarChangedListener); mKZSUTextView = (TextView) view.findViewById(R.id.text_kzsd); mMZSDSeekBar = (SeekBar) view.findViewById(R.id.manzhuansudu); mMZSDSeekBar.setMax(40); mMZSDSeekBar.setProgress(20); mMZSDSeekBar.setOnSeekBarChangeListener(mOnSeekBarChangedListener); mMZSDTextView = (TextView) view.findViewById(R.id.text_mzsd); mJJSDSeekBar = (SeekBar) view.findViewById(R.id.jiasudu); mJJSDSeekBar.setMax(30); mJJSDSeekBar.setProgress(15); mJJSDSeekBar.setOnSeekBarChangeListener(mOnSeekBarChangedListener); mJJSDTextView = (TextView) view.findViewById(R.id.text_jjsd); mStartButton = (Button) view.findViewById(R.id.qidong); mStopButton = (Button) view.findViewById(R.id.tingzhi); mStartButton.setOnClickListener(mButtonListener); mStopButton.setOnClickListener(mButtonListener); mXFZCheckBox = (CheckBox) view.findViewById(R.id.x_fanzhuan); mYFZCheckBox = (CheckBox) view.findViewById(R.id.y_fanzhuan); mXFZCheckBox.setOnClickListener(mOnChangedListener); mYFZCheckBox.setOnClickListener(mOnChangedListener); } private View.OnClickListener mOnChangedListener = new View.OnClickListener() { @Override public void onClick(View v) { int id = v.getId(); switch (id) { case R.id.x_fanzhuan: mCheckBoxCallBack.onXTurn(mXFZCheckBox.isChecked()); break; case R.id.y_fanzhuan: mCheckBoxCallBack.onYTurn(mYFZCheckBox.isChecked()); break; } } }; private SeekBar.OnSeekBarChangeListener mOnSeekBarChangedListener = new SeekBar.OnSeekBarChangeListener() { @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { int id = seekBar.getId(); switch (id) { case R.id.fasongjiange: mFSSJTextView.setText(progress + "ms"); break; case R.id.kuaizhuansudu: mKZSUTextView.setText("" + progress); break; case R.id.manzhuansudu: mMZSDTextView.setText("" + progress); break; case R.id.jiasudu: mJJSDTextView.setText("" + progress); break; } } @Override public void onStartTrackingTouch(SeekBar seekBar) { } @Override public void onStopTrackingTouch(SeekBar seekBar) { if (mJoystickDriver != null) {/*nullmSeekBarCallBacknull. ?JoystickDriver */ int id = seekBar.getId(); switch (id) { case R.id.fasongjiange: mSeekBarCallBack.onFChanged(seekBar.getProgress()); break; case R.id.kuaizhuansudu: mSeekBarCallBack.onHvChanged(seekBar.getProgress()); break; case R.id.manzhuansudu: mSeekBarCallBack.onLvChanged(seekBar.getProgress()); break; case R.id.jiasudu: mSeekBarCallBack.onAChanged(seekBar.getProgress()); break; } } } }; public interface SeekBarCallBack { void onFChanged(int progress); void onHvChanged(int progress); void onLvChanged(int progress); void onAChanged(int progress); } public interface CheckBoxCallBack { void onXTurn(boolean isTurn); void onYTurn(boolean isTurn); } private static SeekBarCallBack mSeekBarCallBack; private static CheckBoxCallBack mCheckBoxCallBack; public static void setCheckBoxCallBack(CheckBoxCallBack checkBoxCallBack) { mCheckBoxCallBack = checkBoxCallBack; } public static void setSeekBarCallBack(SeekBarCallBack seekBarCallBack) { mSeekBarCallBack = seekBarCallBack; } private View.OnClickListener mButtonListener = new View.OnClickListener() { private boolean isStart = true; private long mExitTime = 0; @Override public void onClick(View v) { if (mJoystickDriver != null) {//?null int id = v.getId(); switch (id) { case R.id.qidong: if (isStart) { mJoystickDriver.begin(); mStartButton.setText("?"); mFSJGSeekBar.setEnabled(false); mJJSDSeekBar.setEnabled(false); mKZSUSeekBar.setEnabled(false); mMZSDSeekBar.setEnabled(false); } else { mJoystickDriver.pause(); mStartButton.setText("?"); mFSJGSeekBar.setEnabled(true); mJJSDSeekBar.setEnabled(true); mKZSUSeekBar.setEnabled(true); mMZSDSeekBar.setEnabled(true); } isStart = !isStart; break; case R.id.tingzhi: if ((System.currentTimeMillis() - mExitTime) > 2000) { mJoystickDriver.pause(); mStartButton.setText("?"); isStart = true; Toast.makeText(getActivity(), "?,2s?", Toast.LENGTH_SHORT) .show(); mExitTime = System.currentTimeMillis(); } else { Toast.makeText(getActivity(), "???", Toast.LENGTH_LONG).show(); mJoystickDriver.close(); mStartButton.setText("?"); mStartButton.setEnabled(false); mStopButton.setEnabled(false); Log.i("k", "???"); } break; } } } }; public interface JoystickCallBack { UsbManager getUsbManager(); UsbDevice getUsbDevice(); } private static JoystickCallBack mJoystickCallBack; public static void setJoystickCallBack(JoystickCallBack joystickCallBack) { mJoystickCallBack = joystickCallBack; } /** * Set up the UI and background operations for chat. */ private void setupChat() { Log.d(TAG, "setupChat()"); // Initialize the array adapter for the conversation thread // mConversationArrayAdapter = new ArrayAdapter<String>(getActivity(), R.layout.message); // // mConversationView.setAdapter(mConversationArrayAdapter); // // // Initialize the compose field with a listener for the return key // mOutEditText.setOnEditorActionListener(mWriteListener); // Initialize the send button with a listener that for click events // mSendButton.setOnClickListener(new View.OnClickListener() { // public void onClick(View v) { // // Send a message using content of the edit text widget // View view = getView(); // if (null != view) { // TextView textView = (TextView) view.findViewById(R.id.edit_text_out); // String message = textView.getText().toString(); // sendMessage(message); // } // } // }); // Initialize the BluetoothService to perform bluetooth connections mChatService = new BluetoothService(getActivity(), mHandler); // Initialize the buffer for outgoing messages // mOutStringBuffer = new StringBuffer(""); } /** * Makes this device discoverable. */ private void ensureDiscoverable() { if (mBluetoothAdapter.getScanMode() != BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE) { Intent discoverableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE); discoverableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300); startActivity(discoverableIntent); } } /** * Sends a message. * * @param message A string of text to send. */ private synchronized void sendMessage(byte[] message) { // Check that we're actually connected before trying anything if (mChatService.getState() != BluetoothService.STATE_CONNECTED) { Toast.makeText(getActivity(), R.string.not_connected, Toast.LENGTH_SHORT).show(); return; } // Check that there's actually something to send // if (message.length() > 0) { // Get the message bytes and tell the BluetoothService to write // byte[] send = message.getBytes(); mChatService.write(message); // Reset out string buffer to zero and clear the edit text field // mOutStringBuffer.setLength(0); // mOutEditText.setText(mOutStringBuffer); // } } // /** // * The action listener for the EditText widget, to listen for the return key // */ // private TextView.OnEditorActionListener mWriteListener // = new TextView.OnEditorActionListener() { // public boolean onEditorAction(TextView view, int actionId, KeyEvent event) { // // If the action is a key-up event on the return key, send the message // if (actionId == EditorInfo.IME_NULL && event.getAction() == KeyEvent.ACTION_UP) { // String message = view.getText().toString(); // sendMessage(message); // } // return true; // } // }; /** * Updates the status on the action bar. * * @param resId a string resource ID */ private void setStatus(int resId) { FragmentActivity activity = getActivity(); if (null == activity) { return; } final ActionBar actionBar = activity.getActionBar(); if (null == actionBar) { return; } actionBar.setSubtitle(resId); } /** * Updates the status on the action bar. * * @param subTitle status */ private void setStatus(CharSequence subTitle) { FragmentActivity activity = getActivity(); if (null == activity) { return; } final ActionBar actionBar = activity.getActionBar(); if (null == actionBar) { return; } actionBar.setSubtitle(subTitle); } /** * The Handler that gets information back from the BluetoothService */ private final Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { FragmentActivity activity = getActivity(); switch (msg.what) { case Constants.MESSAGE_STATE_CHANGE: switch (msg.arg1) { case BluetoothService.STATE_CONNECTED: setStatus(getString(R.string.title_connected_to, mConnectedDeviceName)); // mConversationArrayAdapter.clear(); break; case BluetoothService.STATE_CONNECTING: setStatus(R.string.title_connecting); break; case BluetoothService.STATE_LISTEN: case BluetoothService.STATE_NONE: setStatus(R.string.title_not_connected); break; } break; case Constants.MESSAGE_WRITE: byte[] writeBuf = (byte[]) msg.obj; // construct a string from the buffer String writeMessage = new String(writeBuf); // mConversationArrayAdapter.add("Me: " + writeMessage); break; case Constants.MESSAGE_READ: byte[] readBuf = (byte[]) msg.obj; // construct a string from the valid bytes in the buffer String readMessage = new String(readBuf, 0, msg.arg1); // mConversationArrayAdapter.add(mConnectedDeviceName + ": " + readMessage); break; case Constants.MESSAGE_DEVICE_NAME: // save the connected device's name mConnectedDeviceName = msg.getData().getString(Constants.DEVICE_NAME); if (null != activity) { Toast.makeText(activity, "Connected to " + mConnectedDeviceName, Toast.LENGTH_SHORT).show(); } break; case Constants.MESSAGE_TOAST: if (null != activity) { Toast.makeText(activity, msg.getData().getString(Constants.TOAST), Toast.LENGTH_SHORT).show(); } break; } } }; public void onActivityResult(int requestCode, int resultCode, Intent data) { switch (requestCode) { case REQUEST_CONNECT_DEVICE_SECURE: // When DeviceListActivity returns with a device to connect if (resultCode == Activity.RESULT_OK) { connectDevice(data, true); } break; case REQUEST_CONNECT_DEVICE_INSECURE: // When DeviceListActivity returns with a device to connect if (resultCode == Activity.RESULT_OK) { connectDevice(data, false); } break; case REQUEST_ENABLE_BT: // When the request to enable Bluetooth returns if (resultCode == Activity.RESULT_OK) { // Bluetooth is now enabled, so set up a chat session setupChat(); } else { // User did not enable Bluetooth or an error occurred Log.d(TAG, "BT not enabled"); Toast.makeText(getActivity(), R.string.bt_not_enabled_leaving, Toast.LENGTH_SHORT).show(); getActivity().finish(); } } } /** * Establish connection with other divice * * @param data An {@link Intent} with {@link DeviceListActivity#EXTRA_DEVICE_ADDRESS} extra. * @param secure Socket Security type - Secure (true) , Insecure (false) */ private void connectDevice(Intent data, boolean secure) { // Get the device MAC address String address = data.getExtras().getString(DeviceListActivity.EXTRA_DEVICE_ADDRESS); // Get the BluetoothDevice object BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address); // Attempt to connect to the device mChatService.connect(device, secure); } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { inflater.inflate(R.menu.joystick_menu, menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.secure_connect_scan: { // Launch the DeviceListActivity to see devices and do scan Intent serverIntent = new Intent(getActivity(), DeviceListActivity.class); startActivityForResult(serverIntent, REQUEST_CONNECT_DEVICE_SECURE); return true; } // case R.id.insecure_connect_scan: { // // Launch the DeviceListActivity to see devices and do scan // Intent serverIntent = new Intent(getActivity(), DeviceListActivity.class); // startActivityForResult(serverIntent, REQUEST_CONNECT_DEVICE_INSECURE); // return true; // } // case R.id.discoverable: { // // Ensure this device is discoverable by others // ensureDiscoverable(); // return true; // } } return false; } }