如何获取 Android 中当前蓝牙名称?
该示例展示了如何获取 Android 中当前蓝牙名称。
步骤 1 − 在 Android Studio 中创建新项目,转至文件 ⇒ 新项目并填写所有必需的详细信息以创建新项目。
步骤 2 − 添加以下代码到 res/layout/activity_main.xml。
<?xml version = "1.0" encoding = "utf-8"?> <LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android" xmlns:app = "http://schemas.android.com/apk/res-auto" xmlns:tools = "http://schemas.android.com/tools" android:layout_width = "match_parent" android:gravity = "center" android:layout_height = "match_parent" tools:context = ".MainActivity"> <TextView android:id = "@+id/text" android:textSize = "30sp" android:layout_width = "match_parent" android:layout_height = "match_parent" /> </LinearLayout>
在上述代码中,我们采用文本视图来显示蓝牙名称。
步骤 3 − 添加以下代码到 src/MainActivity.java
package com.example.myapplication; import android.bluetooth.BluetoothManager; import android.content.Context; import android.net.ConnectivityManager; import android.net.Network; import android.os.Build; import android.os.Bundle; import android.os.health.SystemHealthManager; import android.provider.Telephony; import android.support.annotation.RequiresApi; import android.support.v7.app.AppCompatActivity; import android.telephony.SmsManager; import android.view.View; import android.view.WindowManager; import android.widget.TextView; public class MainActivity extends AppCompatActivity { TextView textView; @RequiresApi(api = Build.VERSION_CODES.N) @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textView = findViewById(R.id.text); final BluetoothManager manager = (BluetoothManager) getSystemService(BLUETOOTH_SERVICE); textView.setText(manager.getAdapter().getName()); } @Override protected void onStop() { super.onStop(); } @Override protected void onResume() { super.onResume(); } }
步骤 4 − 添加以下代码到 androidManifest.xml
<?xml version = "1.0" encoding = "utf-8"?> <manifest xmlns:android = "http://schemas.android.com/apk/res/android" package = "com.example.myapplication"> <uses-permission android:name = "android.permission.ACCESS_NETWORK_STATE" /> <uses-permission android:name = "android.permission.BLUETOOTH" /> <uses-permission android:name = "android.permission.BLUETOOTH_ADMIN" /> <application android:allowBackup = "true" android:icon = "@mipmap/ic_launcher" android:label = "@string/app_name" android:roundIcon = "@mipmap/ic_launcher_round" android:supportsRtl = "true" android:theme = "@style/AppTheme"> <activity android:name = ".MainActivity"> <intent-filter> <action android:name = "android.intent.action.MAIN" /> <action android:name = "android.net.conn.CONNECTIVITY_CHANGE" /> <category android:name = "android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
让我们尝试运行您的应用程序。我假设您已将实际 Android 移动设备与计算机连接。要从 Android Studio 运行应用程序,请打开您的其中一个项目活动文件,然后单击工具栏中的运行 图标。选择您的移动设备作为选项,然后检查将显示默认屏幕的移动设备 -
单击 此处 下载项目代码
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