蓝牙串口APP源码

package cn.jingedawang.bluetoothdemo;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends Activity {

    private static final int REQUEST_ENABLE_BT = 1;

    private TextView txtIsConnected;
    private EditText edtReceivedMessage;
    private EditText edtSentMessage;
    private EditText edtSendMessage;
    private Button btnSend;
    private Button btnPairedDevices;

    private BluetoothAdapter mBluetoothAdapter;
    private ConnectedThread mConnectedThread;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        txtIsConnected = (TextView) findViewById(R.id.txtIsConnected);
        edtReceivedMessage = (EditText) findViewById(R.id.edtReceivedMessage);
        edtSentMessage = (EditText) findViewById(R.id.edtSentMessage);
        edtSendMessage = (EditText) findViewById(R.id.edtSendMessage);
        btnSend = (Button) findViewById(R.id.btnSend);
        btnPairedDevices = (Button) findViewById(R.id.btnPairedDevices);

        btnPairedDevices.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                // 获取蓝牙适配器
                mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
                if (mBluetoothAdapter == null) {
                    Toast.makeText(getApplicationContext(), "该设备不支持蓝牙", Toast.LENGTH_SHORT).show();
                }

                //请求开启蓝牙
                if (!mBluetoothAdapter.isEnabled()) {
                    Intent enableBtIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
                    startActivityForResult(enableBtIntent, REQUEST_ENABLE_BT);
                }

                //进入蓝牙设备连接界面
                Intent intent = new Intent();
                intent.setClass(getApplicationContext(), DevicesListActivity.class);
                startActivity(intent);

            }
        });

        //点击【发送】按钮后，将文本框中的文本按照ASCII码发送到已连接的蓝牙设备
        btnSend.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (edtSendMessage.getText().toString().isEmpty()) {
                    return;
                }
                String sendStr = edtSendMessage.getText().toString();
                char[] chars = sendStr.toCharArray();
                byte[] bytes = new byte[chars.length];
                for (int i=0; i < chars.length; i  ) {
                    bytes[i] = (byte) chars[i];
                }
                edtSentMessage.append(sendStr);
                mConnectedThread.write(bytes);
            }
        });

    }

    @Override
    protected void onResume() {
        super.onResume();

        //回到主界面后检查是否已成功连接蓝牙设备
        if (BluetoothUtils.getBluetoothSocket() == null || mConnectedThread != null) {
            txtIsConnected.setText("未连接");
            return;
        }

        txtIsConnected.setText("已连接");

        //已连接蓝牙设备，则接收数据，并显示到接收区文本框
        Handler handler = new Handler() {
            @Override
            public void handleMessage(Message msg) {
                super.handleMessage(msg);
                switch (msg.what) {
                    case ConnectedThread.MESSAGE_READ:
                        byte[] buffer = (byte[]) msg.obj;
                        int length = msg.arg1;
                        for (int i=0; i < length; i  ) {
                            char c = (char) buffer[i];
                            edtReceivedMessage.getText().append(c);
                        }
                        break;
                }

            }
        };

        //启动蓝牙数据收发线程
        mConnectedThread = new ConnectedThread(BluetoothUtils.getBluetoothSocket(), handler);
        mConnectedThread.start();

    }
}

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资源文件列表

BluetoothDemo-master/.gitignore , 118
BluetoothDemo-master/.idea/compiler.xml , 686
BluetoothDemo-master/.idea/copyright/profiles_settings.xml , 74
BluetoothDemo-master/.idea/encodings.xml , 159
BluetoothDemo-master/.idea/gradle.xml , 708
BluetoothDemo-master/.idea/misc.xml , 2644
BluetoothDemo-master/.idea/modules.xml , 363
BluetoothDemo-master/.idea/runConfigurations.xml , 564
BluetoothDemo-master/README.md , 132
BluetoothDemo-master/app/.gitignore , 7
BluetoothDemo-master/app/build.gradle , 822
BluetoothDemo-master/app/proguard-rules.pro , 645
BluetoothDemo-master/app/src/androidTest/java/cn/jingedawang/bluetoothdemo/ExampleInstrumentedTest.java , 760
BluetoothDemo-master/app/src/main/AndroidManifest.xml , 942
BluetoothDemo-master/app/src/main/java/cn/jingedawang/bluetoothdemo/BluetoothUtils.java , 380
BluetoothDemo-master/app/src/main/java/cn/jingedawang/bluetoothdemo/ConnectedThread.java , 1990
BluetoothDemo-master/app/src/main/java/cn/jingedawang/bluetoothdemo/DevicesListActivity.java , 6693
BluetoothDemo-master/app/src/main/java/cn/jingedawang/bluetoothdemo/MainActivity.java , 4426
BluetoothDemo-master/app/src/main/res/layout/activity_main.xml , 2714
BluetoothDemo-master/app/src/main/res/layout/item_listview_devices.xml , 391
BluetoothDemo-master/app/src/main/res/layout/listview_devices.xml , 639
BluetoothDemo-master/app/src/main/res/mipmap-hdpi/ic_launcher.png , 3418
BluetoothDemo-master/app/src/main/res/mipmap-mdpi/ic_launcher.png , 2206
BluetoothDemo-master/app/src/main/res/mipmap-xhdpi/ic_launcher.png , 4842
BluetoothDemo-master/app/src/main/res/mipmap-xxhdpi/ic_launcher.png , 7718
BluetoothDemo-master/app/src/main/res/mipmap-xxxhdpi/ic_launcher.png , 10486
BluetoothDemo-master/app/src/main/res/values-w820dp/dimens.xml , 358
BluetoothDemo-master/app/src/main/res/values/colors.xml , 208
BluetoothDemo-master/app/src/main/res/values/dimens.xml , 211
BluetoothDemo-master/app/src/main/res/values/strings.xml , 76
BluetoothDemo-master/app/src/main/res/values/styles.xml , 197
BluetoothDemo-master/app/src/test/java/cn/jingedawang/bluetoothdemo/ExampleUnitTest.java , 406
BluetoothDemo-master/build.gradle , 498
BluetoothDemo-master/gradle.properties , 730
BluetoothDemo-master/gradle/wrapper/gradle-wrapper.jar , 53636
BluetoothDemo-master/gradle/wrapper/gradle-wrapper.properties , 233
BluetoothDemo-master/gradlew , 4971
BluetoothDemo-master/gradlew.bat , 2314
BluetoothDemo-master/settings.gradle , 15