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 -

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