如何在 Android 中獲取當前藍牙地址?
此示例演示如何在 Android 中獲取當前藍牙地址。
步驟 1 − 在 Android Studio 中建立新專案,轉到 File ⇒ New Project,並填寫所有必需資訊以建立新專案。
步驟 2 − 向 res/layout/activity_main.xml 新增以下程式碼。
<?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>
在以上程式碼中,我們使用了文字檢視來顯示藍牙地址。
步驟 3 − 向 src/MainActivity.java 新增以下程式碼
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().getAddress()); } @Override protected void onStop() { super.onStop(); } @Override protected void onResume() { super.onResume(); } }
步驟 4 − 向 androidManifest.xml 新增以下程式碼
<?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>
我們嘗試執行你的應用程式。假設你已將實際的 Android 移動裝置連線至你的電腦。要從 Android Studio 執行應用程式,請開啟專案的一個活動檔案,然後單擊工具欄中的執行 圖示。選擇移動裝置為選項,然後檢查移動裝置,它會顯示你的預設螢幕 –
點選 here 下載專案程式碼
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