如何在 Android 中获取当前互联网连接类型?
此示例展示了如何在 Android 中获取当前互联网连接类型。
步骤 1 − 在 Android Studio 中创建新项目,转到 File ⇒ New Project 并填写所有必需的详细信息来创建新项目。
步骤 2 − 向 res/layout/activity_main.xml 添加以下代码。
<?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,我们采用了文本视图来显示连接类型。
步骤 3 − 向 src/MainActivity.java 添加以下代码
package com.example.myapplication; import android.content.Context; import android.net.ConnectivityManager; import android.net.NetworkInfo; import android.os.Build; import android.os.Bundle; import android.support.annotation.RequiresApi; import android.support.v7.app.AppCompatActivity; 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); ConnectivityManager connManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); NetworkInfo networkInfo = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI); textView.setText("" + networkInfo.getTypeName()); } @Override protected void onStop() { super.onStop(); } @Override protected void onResume() { super.onResume(); } }
步骤 4 − 向 AndroidManifest.xml 添加以下代码
<?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.ACCESS_WIFI_STATE" /> <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>
让我们试着运行你的应用程序。我假设你已经将真机 Android 设备连接到计算机。要从 Android Studio 运行应用程序,请打开项目的活动文件之一并单击工具栏中的 Run 图标。选择移动设备作为选项,然后检查移动设备,它将显示默认屏幕 –
单击此处下载项目代码
广告