如何获取安卓设备信息?
本教程演示了如何在安卓里获取设备信息。
步骤 1 − 在 Android Studio 中新建一个项目,打开文件 ⇒ 新建项目并填写所有必需的信息。
步骤 2 − 将以下代码添加到 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" android:orientation="vertical"> <TextView android:id="@+id/text" android:textSize="30sp" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout>
在上面的代码中,我们获取了一个文本视图来显示设备信息。
步骤 3 − 将以下代码添加到 java/MainActivity.xml
package com.example.myapplication; import android.Manifest; import android.content.Context; import android.content.pm.PackageManager; import android.os.Build; import android.os.Bundle; import android.support.annotation.NonNull; import android.support.annotation.RequiresApi; import android.support.v4.app.ActivityCompat; import android.support.v7.app.AppCompatActivity; import android.telephony.TelephonyManager; import android.widget.TextView; import static android.Manifest.permission.ACCESS_COARSE_LOCATION; import static android.Manifest.permission.READ_PHONE_NUMBERS; import static android.Manifest.permission.READ_PHONE_STATE; import static android.Manifest.permission.READ_SMS; public class MainActivity extends AppCompatActivity { private static final int PERMISSION_REQUEST_CODE = 100; TextView textView; TelephonyManager telephonyManager; @RequiresApi(api = Build.VERSION_CODES.P) @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textView = findViewById(R.id.text); telephonyManager = (TelephonyManager) this.getSystemService(Context.TELEPHONY_SERVICE); if (ActivityCompat.checkSelfPermission(this, READ_SMS) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, READ_PHONE_NUMBERS) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) { ActivityCompat.requestPermissions(this, new String[]{READ_SMS, READ_PHONE_NUMBERS, READ_PHONE_STATE,ACCESS_COARSE_LOCATION}, PERMISSION_REQUEST_CODE); } else { textView.setText(""+telephonyManager.getAllCellInfo()); } } @RequiresApi(api = Build.VERSION_CODES.P) @Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { super.onRequestPermissionsResult(requestCode, permissions, grantResults); switch (requestCode) { case PERMISSION_REQUEST_CODE: if (ActivityCompat.checkSelfPermission(this, READ_SMS) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, READ_PHONE_NUMBERS) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, READ_PHONE_STATE) != PackageManager.PERMISSION_GRANTED) { return; } else { textView.setText(""+telephonyManager.getAllCellInfo()); } } } }
步骤 3 − 将以下代码添加到 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_COARSE_LOCATION" /> <uses-permission android:name="android.permission.READ_PHONE_NUMBERS" /> <uses-permission android:name="android.permission.READ_PHONE_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" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
我们来运行一下你的应用程序。我假设你已经将你的安卓设备连接到电脑上。从 Android Studio 运行应用程序,打开项目中的一个活动文件并单击工具栏上的运行 按钮。选择你的移动设备作为选项,然后查看你的移动设备将显示你的默认屏幕 –
点击 这里 下载项目代码
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