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 com.example.android.bluetoothchat; import android.app.ActionBar; import android.app.Activity; import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothDevice; import android.content.Intent; import android.gesture.GestureOverlayView; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Color; 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.telephony.TelephonyManager; import android.view.GestureDetector; import android.view.KeyEvent; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.view.animation.Animation; import android.view.animation.LinearInterpolator; import android.view.animation.TranslateAnimation; import android.view.inputmethod.EditorInfo; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.EditText; import android.widget.ImageView; import android.widget.ListView; import android.widget.RelativeLayout; import android.widget.TextView; import android.widget.Toast; import android.widget.ViewFlipper; import android.util.Log; import com.example.android.view.DrawView; import java.util.Random; public class BluetoothFragment extends Fragment { private static final String TAG = "BluetoothChatFragment"; // 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; //private final Activity myActivity; private static final int MODE_SEND_PHONENUM = 1; private static final int MODE_SEND_DRAW = 2; private static final int MODE_BOMB_GAME = 3; private static final int MODE_CARD_GAME = 4; private int mainMode; private String signal; private String phoneNum; // Layout Views private ListView mConversationView; private EditText mOutEditText; private Button mSendButton; private GestureOverlayView gestureOverlayView; private RelativeLayout cardGameLayout; private RelativeLayout sendDrawLayout; private TextView touchX; private TextView touchY; private TextView gravityX; private TextView gravityY; private TextView gravityZ; private DrawView drawView; private String mConnectedDeviceName = null; private ArrayAdapter<String> mConversationArrayAdapter; private StringBuffer mOutStringBuffer; private BluetoothAdapter mBluetoothAdapter = null; public BluetoothService mChatService = null; @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(); } TelephonyManager telManager = (TelephonyManager) getActivity() .getSystemService(getActivity().TELEPHONY_SERVICE); phoneNum = telManager.getLine1Number(); } @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_bluetooth, 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); touchX = (TextView) view.findViewById(R.id.touchX); touchY = (TextView) view.findViewById(R.id.touchY); gestureOverlayView = (GestureOverlayView) view.findViewById(R.id.gestures_overlay_sendPhoneNum); cardGameLayout = (RelativeLayout) getActivity().findViewById(R.id.card_layout); setMainView(MODE_SEND_PHONENUM); mainMode = MODE_SEND_PHONENUM; //setMainView(MODE_SEND_DRAW); //mainMode = MODE_SEND_DRAW; } private void setMainView(int mode) { switch (mode) { case MODE_SEND_PHONENUM: mainMode = MODE_SEND_PHONENUM; cardGameLayout.setVisibility(View.GONE); gestureOverlayView.setVisibility(View.VISIBLE); gestureOverlayView.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { int pointerIndex = event.getActionIndex(); int pointerID = event.getPointerId(pointerIndex); float touchXValue = event.getX(pointerIndex); float touchYValue = event.getY(pointerIndex); touchX.setText(String.valueOf(touchXValue)); touchY.setText(String.valueOf(touchYValue)); if (touchYValue <= 0) { if (event.getAction() == MotionEvent.ACTION_UP) {//? ? ? ?? . signal = phoneNum; sendSignal(signal); } } return false; } }); break; case MODE_SEND_DRAW: mainMode = MODE_SEND_DRAW; cardGameLayout.setVisibility(View.INVISIBLE); gestureOverlayView.setVisibility(View.INVISIBLE); sendDrawLayout = (RelativeLayout) getActivity().findViewById(R.id.send_draw_layout); sendDrawLayout.setVisibility(View.VISIBLE); Log.d(TAG, sendDrawLayout.getWidth() + " isjsafdffs"); drawView = new DrawView(getActivity(), sendDrawLayout, getActivity(), mChatService); sendDrawLayout.addView(drawView); break; case MODE_CARD_GAME: mainMode = MODE_CARD_GAME; gestureOverlayView.setVisibility(View.GONE); cardGameLayout.setVisibility(View.VISIBLE); //ViewFlipper break; case MODE_BOMB_GAME: mainMode = MODE_BOMB_GAME; break; } } /** * 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 BluetoothChatService 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 void sendMessage(String 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 BluetoothChatService to write byte[] send = message.getBytes(); mChatService.write(send); // 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 BluetoothChatService */ private final Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { FragmentActivity activity = getActivity(); Random rnd = new Random(); int color = Color.argb(255, rnd.nextInt(256), rnd.nextInt(256), rnd.nextInt(256)); 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); gestureOverlayView.setBackgroundColor(color); 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); gestureOverlayView.setBackgroundColor(color); break; case Constants.BITMAP_READ: Bitmap bitmap = (Bitmap) msg.obj; if (bitmap != null) { Log.d(TAG, bitmap.getWidth() + " and " + bitmap.getHeight()); sendDrawLayout.removeAllViews(); //DrawView newDrawView = new DrawView(getActivity(), sendDrawLayout, getActivity(), mChatService); //newDrawView.setBitmap(bitmap); ImageView imageView = new ImageView(getActivity()); imageView.setImageBitmap(bitmap); sendDrawLayout.addView(imageView); } else { Log.d(TAG, "hull null hull null"); } 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.mode_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.mode_sendPhoneNum: { setMainView(MODE_SEND_PHONENUM); return true; } case R.id.mode_sendDrawing: { setMainView(MODE_SEND_DRAW); return true; } case R.id.mode_cardGame: { setMainView(MODE_CARD_GAME); return true; } case R.id.mode_bombGame: { setMainView(MODE_BOMB_GAME); 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; } private void sendSignal(String Signal) { // Check that we're actually connected before trying anything if (mChatService.getState() != BluetoothService.STATE_CONNECTED) { android.util.Log.d(TAG, mChatService.getState() + ""); Toast.makeText(getActivity(), R.string.not_connected, Toast.LENGTH_SHORT).show(); //return; } if (signal.length() > 0) { // Get the message bytes and tell the BluetoothChatService to write android.util.Log.d(TAG, signal); byte[] send = signal.getBytes(); mChatService.write(send); } } public int getMainMode() { return mainMode; } public void setMainMode(int mode) { this.mainMode = mode; } }