回答編集履歴
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コード追加
test
CHANGED
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こちら自分の方で書き間違えや実装追加をして直すことが出来ましたありがとうございます。
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```
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package com.wabsarva.wings.android.bluetoothledarduinoandroid;
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import androidx.appcompat.app.AppCompatActivity;
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import androidx.core.app.ActivityCompat;
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import android.bluetooth.BluetoothAdapter;
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import android.bluetooth.BluetoothDevice;
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import android.bluetooth.BluetoothSocket;
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import android.content.pm.PackageManager;
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import android.os.Bundle;
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import android.os.Handler;
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import android.os.Message;
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import android.util.Log;
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import android.view.View;
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import android.widget.Button;
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import android.widget.TextView;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.util.Set;
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import java.util.TreeMap;
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import java.util.UUID;
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public class MainActivity extends AppCompatActivity implements Runnable, View.OnClickListener {
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//tag
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private static final String TAG = "BluetoothSample";
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//Bluetooth Adapter
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private BluetoothAdapter mAdapter;
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//Bluetooth device
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private BluetoothDevice mDevice;
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//Bluetooth UUID(固定)
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private final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
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//デバイス名 環境に合わせて変更
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private final String DEVICE_NAME = "HC-05";
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//Soket
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private BluetoothSocket mSocket;
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//Thread
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private Thread mThread;
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//Threadの状態を表す
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private boolean isRunning;
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//接続ボタン
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private Button connectButton;
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//書き込みボタン
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private Button writeButton;
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//Status
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private TextView mStatusTextView;
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//Bluetoothから受信した値
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private TextView mInputTextView;
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//Action(ステータス表示)
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private static final int VIEW_STATUS = 0;
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//Action(取得文字列)
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private static final int VIEW_INPUT = 1;
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//Connect確認フラグ
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private boolean connectFlg = false;
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//BluetoothのOUTputStream
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OutputStream mmOutputStream = null;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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//Layoutにて設定したビューの表示
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setContentView(R.layout.activity_main);
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// TextViewの設定(Layoutにて設定したものを関連付け)
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mInputTextView = (TextView) findViewById(R.id.inputValue);
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mStatusTextView = (TextView) findViewById(R.id.statusValue);
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// Buttonの設定(Layoutにて設定したものを関連付け)
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connectButton = (Button) findViewById(R.id.connectButton);
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writeButton = (Button) findViewById(R.id.writeButton);
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// ボタンのイベント設定
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connectButton.setOnClickListener(this);
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writeButton.setOnClickListener(this);
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// Bluetoothのデバイス名を取得
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// DVICE_NAMEでデバイス名を定義
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mAdapter = BluetoothAdapter.getDefaultAdapter();
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mStatusTextView.setText("SearchDevice");
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if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {
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// TODO: Consider calling
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// ActivityCompat#requestPermissions
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// here to request the missing permissions, and then overriding
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// public void onRequestPermissionsResult(int requestCode, String[] permissions,
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// int[] grantResults)
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// to handle the case where the user grants the permission. See the documentation
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// for ActivityCompat#requestPermissions for more details.
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return;
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}
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Set<BluetoothDevice> devices = mAdapter.getBondedDevices();
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for (BluetoothDevice device : devices) {
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if (device.getName().equals(DEVICE_NAME)) {
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mStatusTextView.setText("find: " + device.getName());
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mDevice = device;
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}
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}
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}
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// 別のアクティビティが起動した場合の処理
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@Override
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protected void onPause() {
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super.onPause();
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isRunning = false;
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connectFlg = false;
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try {
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mSocket.close();
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} catch (Exception e) {
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}
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}
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// スレッド処理(connectボタン押下後に実行)
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@Override
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public void run() {
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InputStream mmInStream = null;
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Message valueMsg = new Message();
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valueMsg.what = VIEW_STATUS;
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valueMsg.obj = "connecting...";
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mHandler.sendMessage(valueMsg);
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try {
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// 取得したデバイス名を使ってBluetoothでSocket接続
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if (ActivityCompat.checkSelfPermission(this, android.Manifest.permission.BLUETOOTH_CONNECT) != PackageManager.PERMISSION_GRANTED) {
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// TODO: Consider calling
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// ActivityCompat#requestPermissions
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// here to request the missing permissions, and then overriding
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// public void onRequestPermissionsResult(int requestCode, String[] permissions,
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// int[] grantResults)
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// to handle the case where the user grants the permission. See the documentation
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// for ActivityCompat#requestPermissions for more details.
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return;
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}
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mSocket = mDevice.createRfcommSocketToServiceRecord(MY_UUID);
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mSocket.connect();
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mmInStream = mSocket.getInputStream();
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mmOutputStream = mSocket.getOutputStream();
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// InputStreamのバッファを格納
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byte[] buffer = new byte[1024];
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// 取得したバッファのサイズを格納
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int bytes;
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valueMsg = new Message();
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valueMsg.what = VIEW_STATUS;
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valueMsg.obj = "connected.";
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mHandler.sendMessage(valueMsg);
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connectFlg = true;
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while(isRunning){
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// InputStreamの読み込み
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bytes = mmInStream.read(buffer);
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Log.i(TAG,"bytes="+bytes);
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// String型に変換
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String readMsg = new String(buffer, 0, bytes);
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// null以外なら表示
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if(readMsg.trim() != null && !readMsg.trim().equals("")){
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Log.i(TAG,"value="+readMsg.trim());
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valueMsg = new Message();
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valueMsg.what = VIEW_INPUT;
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valueMsg.obj = readMsg;
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mHandler.sendMessage(valueMsg);
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}
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}
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}
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// エラー処理
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catch(Exception e){
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valueMsg = new Message();
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valueMsg.what = VIEW_STATUS;
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valueMsg.obj = "Error1:" + e;
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mHandler.sendMessage(valueMsg);
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try{
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mSocket.close();
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}catch(Exception ee){}
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isRunning = false;
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connectFlg = false;
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}
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}
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// ボタン押下時の処理
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@Override
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public void onClick(View v) {
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if(v.equals(connectButton)) {
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// 接続されていない場合のみ
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if (!connectFlg) {
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mStatusTextView.setText("try connect");
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mThread = new Thread(this);
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// Threadを起動し、Bluetooth接続
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isRunning = true;
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mThread.start();
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}
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} else if(v.equals(writeButton)) {
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// 接続中のみ書込みを行う
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if (connectFlg) {
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try {
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// Writeボタン押下時、'2'を送信
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mmOutputStream.write("2".getBytes());
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// 画面上に"Write:"を表示
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mStatusTextView.setText("Write:");
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} catch (IOException e) {
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Message valueMsg = new Message();
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valueMsg.what = VIEW_STATUS;
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valueMsg.obj = "Error2:" + e;
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mHandler.sendMessage(valueMsg);
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}
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} else {
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mStatusTextView.setText("Please push the connect button");
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}
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}
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}
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//描画処理はHandlerでおこなう
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Handler mHandler = new Handler() {
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@Override
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public void handleMessage(Message msg) {
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int action = msg.what;
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String msgStr = (String)msg.obj;
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if(action == VIEW_INPUT){
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mInputTextView.setText(msgStr);
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}
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else if(action == VIEW_STATUS){
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mStatusTextView.setText(msgStr);
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}
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}
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};
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}
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```
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