Get some basic Android Device information

    By going to Settings, select About Device, you will see all it's informations. From manufacture, product name to Kernel version, Android OS version, serial...would be listed! Each device has a separate informations. For example, this is my ASUS Zenfone-4:

    How to get these informations in programmatically code? In this post, I will help you resolve this problem!

1. Information provider classes

    There are 2 classes which store device information in Android:
- android.os.Build: All information about the current build, extracted from system properties.
- java.lang.System: Provides access to system-related information and resources including standard input and output. All methods of this class are accessed in a static way and the class itself can not be instantiated. By getproperty (String propertyName) method, you can get device System information.
    And there are some features from these 2 classes:

Android.os.Build	PRODUCT	The name of the overall product
	MODEL	The end-user-visible name for the end product
	MANUFACTURE	The manufacturer of the product/hardware
	SERIAL	A hardware serial number, if available. Alphanumeric only, case-insensitive
	FINGERPRINT	A string that uniquely identifies this build. Do not attempt to parse this value
	getRadioVersion()	Returns the version string for the radio firmware. May return null (if, for instance, the radio is not currently on)
Java.lang.System	getProperty("os.version")	OS (kernel) version
	getProperty( "os.name")	OS (kernel) name
	getProperty("os.arch")	OS (kernel) architecture
	...	...

2. Create an Android Project

    In this sample project, I show some device information and status into TextViews after click Button "Get Device Information".
    Layout for activity:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin">

    <Button
        android:id="@+id/btn_get"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginBottom="10dp"
        android:text="@string/app_name" />

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/model"
            android:textColor="@android:color/holo_green_dark"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/model"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textColor="@android:color/holo_blue_dark"
            android:textStyle="bold" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/device_name"
            android:textColor="@android:color/holo_green_dark"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/device_name"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textColor="@android:color/holo_blue_dark"
            android:textStyle="bold" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/manufacture"
            android:textColor="@android:color/holo_green_dark"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/manufacture"
            android:layout_width="0dp"
            android:textAllCaps="true"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textColor="@android:color/holo_blue_dark"
            android:textStyle="bold" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/screen"
            android:textColor="@android:color/holo_green_dark"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/screen_res"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textColor="@android:color/holo_blue_dark"
            android:textStyle="bold" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/version_os"
            android:textColor="@android:color/holo_green_dark"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/version_os"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textColor="@android:color/holo_blue_dark"
            android:textStyle="bold" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/serial"
            android:textColor="@android:color/holo_green_dark"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/serial"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textColor="@android:color/holo_blue_dark"
            android:textStyle="bold" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/kernel"
            android:textColor="@android:color/holo_green_dark"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/kernel"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textColor="@android:color/holo_blue_dark"
            android:textStyle="bold" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/baseband"
            android:textColor="@android:color/holo_green_dark"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/baseband"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textColor="@android:color/holo_blue_dark"
            android:textStyle="bold" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/build"
            android:textColor="@android:color/holo_green_dark"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/build_num"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textColor="@android:color/holo_blue_dark"
            android:textStyle="bold" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/wifi_status"
            android:textColor="@android:color/holo_green_dark"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/wifi_status"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textColor="@android:color/holo_blue_dark"
            android:textStyle="bold" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/mobile_network_status"
            android:textColor="@android:color/holo_green_dark"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/mobile_network_status"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textColor="@android:color/holo_blue_dark"
            android:textStyle="bold" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <TextView
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="@string/bluetooth"
            android:textColor="@android:color/holo_green_dark"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/bluetooth_status"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:textColor="@android:color/holo_blue_dark"
            android:textStyle="bold" />
    </LinearLayout>

</LinearLayout>

    Now, we'll create some important methods. For checking our device network connection, provide 2 these methods to check wifi and 3G connection:

    /**
     * Checks if the device has Wifi connection.
     */
    public String isWifiNetworkAvailable(Context context) {
        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo wifiNetwork = cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI);

        if (wifiNetwork != null && wifiNetwork.isConnected()) {
            return "Connected";
        } else return "Disconnected";
    }
 
    /**
     * Checks if the device has 3G or other mobile data connection.
     */

    public String isMobileNetworkAvailable(Context context) {
        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo mobileNetwork = cm.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);

        if (mobileNetwork != null && mobileNetwork.isConnected()) {
            return "Connected";
        } else {
            return "Disconnected";
     }

    Most of Android device support Bluetooth connection, so we can check it's status through checkingBluetoothConnection method:

private String checkingBluetoothConnection () {
        BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        if (mBluetoothAdapter == null) {
            return "Not supported"; //device not support Bluetooth
        } else {
            if (!mBluetoothAdapter.isEnabled()) {
                return "Disabled"; // Bluetooth is disabled
            } else {
                return "Enabled"; //Bluetooth adapter is anabled and ready to pair with other devices
            }
        }
    }

    We also get device screen resolution (Unit: pixels) by using WindowManager:

public String getDeviceScreenResolution() {
        Display display = getWindowManager().getDefaultDisplay();
        Point size = new Point();
        display.getSize(size);

        int width = size.x; //device width
        int height = size.y; //device height

        return "" + width + " x " + height; //example "480 * 800"
    }

    Showing all information to TextViews in getDeviceInformation method:

private void getDeviceInformation() {
        textDeviceName.setText(Build.PRODUCT);
        textModel.setText(Build.MODEL); // get model name
        textManufacture.setText(Build.MANUFACTURER); // get device manufacture
        textSerial.setText(Build.SERIAL); // get device Serial
        textBasebandVersion.setText(Build.getRadioVersion());
        textOSVersion.setText(Build.VERSION.RELEASE); // get OS version
        textKernelVersion.setText(System.getProperty("os.version")); // get kernel version
        textWifiStatus.setText(isWifiNetworkAvailable(this)); // check wifi connection
        textMobileNetworkStatus.setText(isMobileNetworkAvailable(this)); //check 3G connection
        textBluetoothStatus.setText(checkBluetoothConnection()); //check bluetooth status
        textScreenResolution.setText(getDeviceScreenResolution()); //get device resolution
        textBuildNumber.setText(Build.FINGERPRINT); //get Device's Build Number
    }

3. Final Code

    InforActivity.java: contains all above methods:

package info.devexchanges.deviceinfor;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.content.Context;
import android.graphics.Point;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.Display;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import butterknife.ButterKnife;
import butterknife.InjectView;
import butterknife.InjectViews;
import butterknife.OnClick;


public class InforActivity extends Activity {

    @InjectView(R.id.wifi_status)
    TextView textWifiStatus;

    @InjectView(R.id.manufacture)
    TextView textManufacture;

    @InjectView(R.id.model)
    TextView textModel;

    @InjectView(R.id.device_name)
    TextView textDeviceName;

    @InjectView(R.id.mobile_network_status)
    TextView textMobileNetworkStatus;

    @InjectView(R.id.kernel)
    TextView textKernelVersion;

    @InjectView(R.id.serial)
    TextView textSerial;

    @InjectView(R.id.baseband)
    TextView textBasebandVersion;

    @InjectView(R.id.version_os)
    TextView textOSVersion;

    @InjectView(R.id.build_num)
    TextView textBuildNumber;

    @InjectView(R.id.screen_res)
    TextView textScreenResolution;

    @InjectView(R.id.bluetooth_status)
    TextView textBluetoothStatus;

    /**
     * Handling button event
     * get device information and show in TextViews
     */
    @OnClick(R.id.btn_get)
    void onClick() {
        getDeviceInformation();
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_infor);

        //define inject this layout
        ButterKnife.inject(this);
    }

    public String getDeviceScreenResolution() {
        Display display = getWindowManager().getDefaultDisplay();
        Point size = new Point();
        display.getSize(size);

        int width = size.x; //device width
        int height = size.y; //device height

        return "" + width + " x " + height; //example "480 * 800"
    }

    private void getDeviceInformation() {
        textDeviceName.setText(Build.PRODUCT);
        textModel.setText(Build.MODEL); // get model name
        textManufacture.setText(Build.MANUFACTURER); // get device manufacture
        textSerial.setText(Build.SERIAL); // get device Serial
        textBasebandVersion.setText(Build.getRadioVersion());
        textOSVersion.setText(Build.VERSION.RELEASE); // get OS version
        textKernelVersion.setText(System.getProperty("os.version")); // get kernel version
        textWifiStatus.setText(isWifiNetworkAvailable(this)); // check wifi connection
        textMobileNetworkStatus.setText(isMobileNetworkAvailable(this)); //check 3G connection
        textBluetoothStatus.setText(checkBluetoothConnection()); //check bluetooth status
        textScreenResolution.setText(getDeviceScreenResolution()); //get device resolution
        textBuildNumber.setText(Build.FINGERPRINT); //get Device's Build Number
    }

    /**
     * Checks if the device has Wifi connection.
     */
    public String isWifiNetworkAvailable(Context context) {
        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo wifiNetwork = cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI);

        if (wifiNetwork != null && wifiNetwork.isConnected()) {
            return "Connected";
        } else return "Disconnected";
    }
 
 /**
     * Checks if the device has 3G or other mobile data connection.
     */

    public String isMobileNetworkAvailable(Context context) {
        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo mobileNetwork = cm.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);

        if (mobileNetwork != null && mobileNetwork.isConnected()) {
            return "Connected";
        } else {
            return "Disconnected";
        }

    }

    private String checkBluetoothConnection () {
        BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        if (mBluetoothAdapter == null) {
            return "Not supported";
        } else {
            if (!mBluetoothAdapter.isEnabled()) {
                return "Disabled";
            } else {
                return "Enabled";
            }
        }
    }
}

    For checking Internet connection (network status), Bluetooth status, you must add some permissions in AndroidManifest.xml, so it could be like this:

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="info.devexchanges.deviceinfor" >

    <uses-permission android:name="android.permission.BLUETOOTH"/>
    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".InforActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

4. Application output

 
    Install in Android devices, we can see this:

ASUS_ZENFONE_4

GENYMOTION_EMULATOR

5. References

    In this project, I used ButterKnife library to inject views (you can see in InforActivity.java):

• Read my previous post to learn how to use it.
• Go to ButterKnife library page to deep understanding it.
• Thanks JakeWharton for this useful library.

   Official docs of 2 classes:

• android.os.Build:  http://developer.android.com/reference/android/os/Build.html
• java.lang.System:  http://developer.android.com/reference/java/lang/System.html

Author : Hong Thai

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