Get Device Info Example

Learn how to get device info in android using this example written in Java.

Here is the demo of the created app:

Step 1: Dependencies

No external dependencies are needed for this project.

Step 2: Design Layouts

We have only one layout:

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:paddingBottom="@dimen/activity_vertical_margin"
            android:paddingLeft="@dimen/activity_horizontal_margin"
            android:paddingRight="@dimen/activity_horizontal_margin"
            android:paddingTop="@dimen/activity_vertical_margin"
            android:scrollbars="vertical">

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

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/screen_size_label"
            android:textStyle="bold"/>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/screen_size_width"/>

            <TextView
                android:id="@+id/screen_size_width"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#00aaaa"/>
        </LinearLayout>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/screen_size_height"/>

            <TextView
                android:id="@+id/screen_size_height"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#00aaaa"/>
        </LinearLayout>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/screen_size"/>

            <TextView
                android:id="@+id/screen_size"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#00aaaa"/>
        </LinearLayout>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/resolution_label"
            android:textStyle="bold"/>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/resolution_width"
                android:textColor="#dd5555"/>

            <TextView
                android:id="@+id/resolution_width"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#00aaaa"/>
        </LinearLayout>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/resolution_height"
                android:textColor="#dd5555"/>

            <TextView
                android:id="@+id/resolution_height"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#00aaaa"/>
        </LinearLayout>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/dpi_label"
            android:textStyle="bold"/>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/dpi_width"/>

            <TextView
                android:id="@+id/dpi_width"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#00aaaa"/>
        </LinearLayout>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/dpi_height"/>

            <TextView
                android:id="@+id/dpi_height"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#00aaaa"/>
        </LinearLayout>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/density_dpi"
                android:textColor="#dd5555"/>

            <TextView
                android:id="@+id/density_dpi"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#00aaaa"/>
        </LinearLayout>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/density_label"
            android:textStyle="bold"/>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/density"/>

            <TextView
                android:id="@+id/density"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#00aaaa"/>
        </LinearLayout>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/dip_label"
            android:textStyle="bold"/>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/dip_width"/>

            <TextView
                android:id="@+id/dip_width"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#00aaaa"/>
        </LinearLayout>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/dip_height"/>

            <TextView
                android:id="@+id/dip_height"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#00aaaa"/>
        </LinearLayout>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/suggestion_label"
            android:textColor="#ff2222"
            android:textStyle="bold"/>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/suggestion_layout"/>

            <TextView
                android:id="@+id/suggestion_layout_simple"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#00aaaa"/>
        </LinearLayout>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/suggestion_layout"/>

            <TextView
                android:id="@+id/suggestion_layout"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#00aaaa"/>
        </LinearLayout>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/suggestion_layout_land"/>

            <TextView
                android:id="@+id/suggestion_layout_land"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#00aaaa"/>
        </LinearLayout>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/suggestion_values"/>

            <TextView
                android:id="@+id/suggestion_values_simple"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#00aaaa"/>
        </LinearLayout>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/suggestion_values"/>

            <TextView
                android:id="@+id/suggestion_values"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#00aaaa"/>
        </LinearLayout>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@string/suggestion_values_land"/>

            <TextView
                android:id="@+id/suggestion_values_land"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#00aaaa"/>
        </LinearLayout>

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="other"
            android:textColor="#ff2222"
            android:textStyle="bold"/>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="status_bar_height:"/>

            <TextView
                android:id="@+id/status_bar_height"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#00aaaa"/>
        </LinearLayout>

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

            <TextView
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="navigation_bar_height:"/>

            <TextView
                android:id="@+id/navigation_bar_height"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textColor="#00aaaa"/>
        </LinearLayout>

    </LinearLayout>
</ScrollView>

Step 3: Create MainActivity

Write MainActivity code as shown below

MainActivity.java

package com.displayinfo;

import android.content.res.Resources;
import android.graphics.Rect;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.DisplayMetrics;
import android.view.Window;
import android.widget.TextView;

/**
 * Android Developer Document
 * https://developer.android.com/reference/android/util/DisplayMetrics.html
 */
public class MainActivity extends AppCompatActivity {

    private TextView mDIPHeight;
    private TextView mDIPWidth;
    private TextView mDPIHeight;
    private TextView mDPIWidth;
    private TextView mDensityDpi;
    private TextView mDesity;
    private TextView mResolutionHeight;
    private TextView mResolutionWidth;
    private TextView mScreenSizeHeight;
    private TextView mScreenSize;
    private TextView mScreenSizeWidth;
    private TextView mSuggestionLayout;
    private TextView mSuggestionLayoutLand;
    private TextView mSuggestionLayoutSimple;
    private TextView mSuggestionValues;
    private TextView mSuggestionValuesLand;
    private TextView mSuggestionValuesSimple;
    private TextView mStatusBaHheight;
    private TextView mNavigationBarHeight;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        this.mScreenSizeWidth = (TextView) findViewById(R.id.screen_size_width);
        this.mScreenSizeHeight = (TextView) findViewById(R.id.screen_size_height);
        this.mScreenSize = (TextView) findViewById(R.id.screen_size);
        this.mResolutionWidth = (TextView) findViewById(R.id.resolution_width);
        this.mResolutionHeight = (TextView) findViewById(R.id.resolution_height);
        this.mDPIWidth = (TextView) findViewById(R.id.dpi_width);
        this.mDPIHeight = (TextView) findViewById(R.id.dpi_height);
        this.mDensityDpi = (TextView) findViewById(R.id.density_dpi);
        this.mDesity = (TextView) findViewById(R.id.density);
        this.mDIPWidth = (TextView) findViewById(R.id.dip_width);
        this.mDIPHeight = (TextView) findViewById(R.id.dip_height);
        this.mSuggestionLayout = (TextView) findViewById(R.id.suggestion_layout);
        this.mSuggestionLayoutLand = (TextView) findViewById(R.id.suggestion_layout_land);
        this.mSuggestionLayoutSimple = (TextView) findViewById(R.id.suggestion_layout_simple);
        this.mSuggestionValues = (TextView) findViewById(R.id.suggestion_values);
        this.mSuggestionValuesLand = (TextView) findViewById(R.id.suggestion_values_land);
        this.mSuggestionValuesSimple = (TextView) findViewById(R.id.suggestion_values_simple);
        this.mStatusBaHheight = (TextView) findViewById(R.id.status_bar_height);
        this.mNavigationBarHeight = (TextView) findViewById(R.id.navigation_bar_height);

        /**
         *  A structure describing general information about a display,
         *  such as its size, density, and font scaling.
         */

        DisplayMetrics dm = getResources().getDisplayMetrics();
        //获取屏幕尺寸
        this.mScreenSizeWidth.setText(String.valueOf(((float) dm.widthPixels) / dm.xdpi));
        this.mScreenSizeHeight.setText(String.valueOf(((float) dm.heightPixels) / dm.ydpi));
        double x = Math.pow(dm.widthPixels / dm.xdpi, 2);
        double y = Math.pow(dm.heightPixels / dm.ydpi, 2);
        this.mScreenSize.setText(String.valueOf(Math.sqrt(x + y)));
        //获取屏幕分辨率
        this.mResolutionWidth.setText(String.valueOf(dm.widthPixels));
        this.mResolutionHeight.setText(String.valueOf(dm.heightPixels));
        //物理像素
        this.mDPIWidth.setText(String.valueOf(dm.xdpi));
        this.mDPIHeight.setText(String.valueOf(dm.ydpi));
        //The screen density expressed as dots-per-inch.
        this.mDensityDpi.setText(densityDpiToString(dm.densityDpi));

        this.mDesity.setText(String.valueOf(dm.density));

        float dipW = (((float) dm.widthPixels) * 160.0f) / ((float) dm.densityDpi);
        float dipH = (((float) dm.heightPixels) * 160.0f) / ((float) dm.densityDpi);
        this.mDIPWidth.setText(String.valueOf(dipW));
        this.mDIPHeight.setText(String.valueOf(dipH));

        this.mSuggestionLayout.setText("layout" + getSmallestWidthString((int) dipW, (int) dipH) + getResolutionString(dm.widthPixels, dm.heightPixels));
        this.mSuggestionLayoutLand.setText("layout-land" + getSmallestWidthString((int) dipW, (int) dipH) + getResolutionString(dm.widthPixels, dm.heightPixels));
        this.mSuggestionLayoutSimple.setText("layout" + getSmallestWidthString((int) dipW, (int) dipH));
        this.mSuggestionValues.setText("values" + getSmallestWidthString((int) dipW, (int) dipH) + getResolutionString(dm.widthPixels, dm.heightPixels));
        this.mSuggestionValuesLand.setText("values-land" + getSmallestWidthString((int) dipW, (int) dipH) + getResolutionString(dm.widthPixels, dm.heightPixels));
        this.mSuggestionValuesSimple.setText("values" + getSmallestWidthString((int) dipW, (int) dipH));

        this.mStatusBaHheight.setText(String.valueOf(getStatusBarHeight()));
        this.mNavigationBarHeight.setText(String.valueOf(getNavigationBarHeight()));

    }

    //获得导航栏的高度
    public int getNavigationBarHeight() {
        Resources resources = getResources();
        int resourceId = resources.getIdentifier("navigation_bar_height", "dimen", "android"); //获取NavigationBar的高度
        int height = resources.getDimensionPixelSize(resourceId);
        return height;
    }

    //获取状态栏的高度
    public int getStatusBarHeight() {
        DisplayMetrics dm = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(dm);
        int width = dm.widthPixels;  //屏幕宽
        int height = dm.heightPixels;  //屏幕高
        Rect frame = new Rect();
        getWindow().getDecorView().getWindowVisibleDisplayFrame(frame);
        int statusBarHeight = frame.top;  //状态栏高
        int contentTop = getWindow().findViewById(Window.ID_ANDROID_CONTENT).getTop();
        int titleBarHeight = contentTop - statusBarHeight; //标题栏高

        return titleBarHeight;
    }

    private String densityDpiToString(int densityDpi) {
        String str;
        switch (densityDpi) {
            case 120:
                str = "ldpi";
                break;
            case 160:
                str = "mdpi";
                break;
            case 213:
                str = "tvdpi";
                break;
            case 240:
                str = "hdpi";
                break;
            case 320:
                str = "xhdpi";
                break;
            case 480:
                str = "xxhdpi";
                break;
            case 640:
                str = "xxxhdpi";
                break;
            default:
                str = "N/A";
                break;
        }
        return densityDpi + " (" + str + ")";
    }

    private String getResolutionString(int rw, int rh) {
        return rw > rh ? "-" + rw + "x" + rh : "-" + rh + "x" + rw;
    }

    private String getSmallestWidthString(int dipWidth, int dipHeight) {
        StringBuilder stringBuilder = new StringBuilder("-sw");
        if (dipWidth >= dipHeight) {
            dipWidth = dipHeight;
        }
        return stringBuilder.append(dipWidth).append("dp").toString();
    }

}

Reference

Download full code here.
Follow code author here.

Example 2: DeviceInfo-Sample

Get easy access to device information super fast, real quick.

Simple, single class wrapper to get device information from an android device.

This library provides an easy way to access all the device information without having to deal with all the boilerplate stuff going on inside.

Library also provides option to ask permissions for Marshmellow devices!

Here are demo screenshots:

Step 1: Integrate the library

Gradle Dependecy

dependencies {
        implementation 'com.an.deviceinfo:deviceinfo:0.1.5'
}

Maven Dependecy

<dependency>
  <groupId>com.an.deviceinfo</groupId>
  <artifactId>deviceinfo</artifactId>
  <version>0.1.5</version>
  <type>pom</type>
</dependency>

Download

You can download the aar file from the release folder in this project.
In order to import a .aar library:
1) Go to File>New>New Module
2) Select "Import .JAR/.AAR Package" and click next.
3) Enter the path to .aar file and click finish.
4) Go to File>Project Settings (Ctrl+Shift+Alt+S).
5) Under "Modules," in left menu, select "app."
6) Go to "Dependencies tab.
7) Click the green "+" in the upper right corner.
8) Select "Module Dependency"
9) Select the new module from the list.

Step 2: Usage

For easy use, I have split up all the device information by the following:

1. Location
2. Ads
3. App
4. Battery
5. Device
6. Memory
7. Network
8. User Installed Apps
9. User Contacts
   

   Location

   LocationInfo locationInfo = new LocationInfo(this);
   DeviceLocation location = locationInfo.getLocation();
   

   Value	Function Name	Returns
   Latitude	getLatitude()	Double
   Longitude	getLongitude()	Double
   Address Line 1	getAddressLine1()	String
   City	getCity()	String
   State	getState()	String
   CountryCode	getCountryCode()	String
   Postal Code	getPostalCode()	String

   Ads

   No Google play services needed!

   AdInfo adInfo = new AdInfo(this);
   adInfo.getAndroidAdId(new new AdInfo.AdIdCallback() {
                        @Override
                        public void onResponse(Ad ad) {
                            String advertisingId = ad.getAdvertisingId();
                            Boolean canTrackAds = ad.isAdDoNotTrack();
                        }
                    });
   

   Value	Function Name	Returns
   AdvertisingId	getAdvertisingId()	String
   Can Track ads	isAdDoNotTrack()	boolean

   App

   App app = new App(this);
   

   Value	Function Name	Returns
   App Name	getAppName()	String
   Package Name	getPackageName()	String
   Activity Name	getActivityName()	String
   App Version Name	getAppVersionName()	String
   App Version Code	getAppVersionCode()	Integer

   Battery

   Battery battery = new Battery(this);
   

   Value	Function Name	Returns
   Battery Percent	getBatteryPercent()	int
   Is Phone Charging	isPhoneCharging()	boolean
   Battery Health	getBatteryHealth()	String
   Battery Technology	getBatteryTechnology()	String
   Battery Temperature	getBatteryTemperature()	float
   Battery Voltage	getBatteryVoltage()	int
   Charging Source	getChargingSource()	String
   Is Battery Present	isBatteryPresent()	boolean

   Device

   Device device = new Device(this);
   

   Value	Function Name	Returns
   Release Build Version	getReleaseBuildVersion()	String
   Build Version Code Name	getBuildVersionCodeName()	String
   Manufacturer	getManufacturer()	String
   Model	getModel()	String
   Product	getProduct()	String
   Fingerprint	getFingerprint()	String
   Hardware	getHardware()	String
   Radio Version	getRadioVersion()	String
   Device	getDevice()	String
   Board	getBoard()	String
   Display Version	getDisplayVersion()	String
   Build Brand	getBuildBrand()	String
   Build Host	getBuildHost()	String
   Build Time	getBuildTime()	long
   Build User	getBuildUser()	String
   Serial	getSerial()	String
   Os Version	getOsVersion()	String
   Language	getLanguage()	String
   SDK Version	getSdkVersion()	int
   Screen Density	getScreenDensity()	String
   Screen Height	getScreenHeight()	int
   Screen Density	getScreenWidth()	int

   Memory

   Memory memory = new Memory(this);
   

   Value	Function Name	Returns
   Has External SD Card	isHasExternalSDCard()	boolean
   Total RAM	getTotalRAM()	long
   Available Internal Memory Size	getAvailableInternalMemorySize()	long
   Total Internal Memory Size	getTotalInternalMemorySize()	long
   Available External Memory Size	getAvailableExternalMemorySize()	long
   Total External Memory Size	getTotalExternalMemorySize()	String

   Network

   Network network = new Network(this);
   

   Value	Function Name	Returns
   IMEI	getIMEI()	String
   IMSI	getIMSI()	String
   Phone Type	getPhoneType()	String
   Phone Number	getPhoneNumber()	String
   Operator	getOperator()	String
   SIM Serial	getsIMSerial()	String
   Network Class	getNetworkClass()	String
   Network Type	getNetworkType()	String
   Is SIM Locked	isSimNetworkLocked()	boolean
   Is Nfc Present	isNfcPresent()	boolean
   Is Nfc Enabled	isNfcEnabled()	boolean
   Is Wifi Enabled	isWifiEnabled()	boolean
   Is Network Available	isNetworkAvailable()	boolean

   User Installed Apps

   UserAppInfo userAppInfo = new UserAppInfo(this);
   List<UserApps> userApps = userAppInfo.getInstalledApps(boolean includeSystemApps);
   

   Value	Function Name	Returns
   App Name	getAppName()	String
   Package Name	getPackageName()	String
   Version Name	getVersionName()	String
   Version Code	getVersionCode()	int

   User Contacts

   UserContactInfo userContactInfo = new UserContactInfo(mActivity);
   List<UserContacts> userContacts = userContactInfo.getContacts();
   

   Value	Function Name	Returns
   Contact Name	getDisplayName()	String
   Mobile Number	getMobileNumber()	String
   Phone Type	phoneType()	String

   How to get Permissions for android 6+

   Easy! I have provided a small, easy wrapper for getting permissions for marshmellow devices.

First, override onRequestPermissionsResult and call PermissionManager.handleResult(requestCode, permissions, grantResults);

PermissionManager permissionManager = new PermissionManager(this);
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        permissionManager.handleResult(requestCode, permissions, grantResults);
    }

Now you can ask permission:

permissionManager.showPermissionDialog(permission)
                    .withDenyDialogEnabled(true)
                    .withDenyDialogMsg(mActivity.getString(R.string.permission_location))
                    .withCallback(new PermissionManager.PermissionCallback() {
                        @Override
                        public void onPermissionGranted(String[] permissions, int[] grantResults) {
                            //you can handle what to do when permission is granted
                        }

                        @Override
                        public void onPermissionDismissed(String permission) {
                           /**
                             * user has denied the permission. We can display a custom dialog 
                             * to user asking for permission
                           * */
                        }

                        @Override
                        public void onPositiveButtonClicked(DialogInterface dialog, int which) {
                          /**
                            * You can choose to open the
                            * app settings screen
                            * * */
                              PermissionUtils permissionUtils = new PermissionUtils(this);
                              permissionUtils.openAppSettings();
                        }

                        @Override
                        public void onNegativeButtonClicked(DialogInterface dialog, int which) {
                          /**
                            * The user has denied the permission!
                            * You need to handle this in your code
                            * * */
                        }
                    })
                    .build();

Various options available in PermissionManager

Value	Function Name	Returns
To enable custom dialog when user has denied the permission	withDenyDialogEnabled()	boolean
To enable Rationale, explaining the need for the permission, the first time they have denied the permission	withRationaleEnabled()	boolean
Message to be displayed in the custom dialog	withDenyDialogMsg()	String
Title to be displayed in the custom dialog	withDenyDialogTitle()	String
Postive Button text to be displayed in the custom alert dialog	withDenyDialogPosBtnText()	String
Negative Button text to be displayed in the custom alert dialog	withDenyDialogNegBtnText()	String
Should display the negative button flag	withDenyDialogNegBtn()	boolean
Flag to cancel the dialog	isDialogCancellable()	boolean

Reference

Read more here.
Download code here.
Follow code author here.

Example 3: Use appzy/DeviceInfo

Collect Android device information and output it in the form of Json

You can freely customize the type of device to be collected, the details of the displayed device information, etc.

Features

• By inheriting BaseDeviceInfoCollectorclasses, cooperate DeviceInfoManagerto obtain any device information
• By DeviceInfoManagermanaging each device information collector (hereinafter referred to as Collector), Collectors can be added freely to collect N kinds of software and hardware device information at the same time
• Collector is divided into two collection methods: automatic collection and manual collection.
  • Automatic collection: Manager controls collection that occurs spontaneously
  • Manual collection: Data collection process that requires user interaction
• Multiple Collectors managed by Manager do concurrent automatic collection, and manual collection can be configured to start automatically after the automatic collection action ends
• Each Collector independently manages the permissions it needs and applies it in the Manager (SDK_VERSION >= 23)
• You can choose to get the device information of all modules (Json), or you can choose to output only a single module (Json)
• Provides rich status callback interfaces DeviceInfoCollectListener, which can monitor various statuses such as the end of collection

Currently available device information (only used as a template, it is recommended to customize it when using it):

• Android device basic information (PhoneBasicInfoCollector)
• Sim Card Information (SimInfoCollector)
  • Recognize multiple Sim cards at the same time
• Board Information (BoardInfoCollector)
• Cpu Information (CpuInfoCollector)
• Battery Info (BatteryInfoCollector)
• Screen Info (ScreenInfoCollector)
• NFC information (NfcInfoCollector)
• Sensor List (SensorInfoCollector)
• Camera Info (CameraInfoCollector)
• Storage Information (RAM & SD) (StorageInfoCollector)
• Ui Information (UiInfoCollector)
• System related information (Build.prop, etc.)z

Step 1: Add dependency library

• Step 1.Add it in your root build.gradle at the end of repositories

      allprojects {
          repositories {
              ...
              maven { url 'https://jitpack.io' }
          }
      }
  

• Step 2.Add the dependency

      dependencies {
              implementation 'com.github.guyuepeng:DeviceInfo:xxx'
      }
  

Step 2: Write Code

DeviceInfoManager.NewInstance(this)
        .addCollector(new PhoneBasicInfoCollector(this, "basic"))       //Andorid设备基本信息（PhoneBasicInfoCollector）
        .addCollector(new SimInfoCollector(this, "sim"))                //Sim卡信息（SimInfoCollector）同时识别多张Sim卡
        .addCollector(new CpuInfoCollector(this, "cpu"))                //Cpu信息（CpuInfoCollector）
        .addCollector(new BoardInfoCollector(this, "board"))            //主板信息（BoardInfoCollector）
        .addCollector(new BatteryInfoCollector(this, "battery"))        //电池信息（BatteryInfoCollector）
        .addCollector(new StorageInfoCollector(this, "storage"))        //存储信息（RAM & SD）（StorageInfoCollector）
        .addCollector(new CameraInfoCollector(this, "camera", true))    //摄像头信息（CameraInfoCollector）
        .addCollector(new ScreenInfoCollector(this, "screen"))          //屏幕信息（ScreenInfoCollector）
        .addCollector(new UiInfoCollector(this, "ui"))                  //Ui信息（UiInfoCollector）
        .addCollector(new SensorInfoCollector(this, "sensor"))          //传感器列表（SensorInfoCollector）
        .addCollector(new NfcInfoCollector(this, "nfc"))                //NFC信息（NfcInfoCollector）
        .addCollector(new SystemInfoCollector(this, "system"))          //系统相关信息（Build.prop等）
        .autoStartManualCollection(true)
        .bindListener(mDeviceInfoCollectListener)
        .start();

Default output:

{
    "board": {"boardName": "MSM8939"},
    "sim": [{
        "dataState": "0",
        "imsi": "460036820263837",
        "isNetworkRoaming": "false",
        "networkOperatorName": "China Telecom",
        "networkType": "14",
        "phoneType": "2",
        "simCountryIso": "cn",
        "simOperator": "46003",
        "simSerialNumber": "89860315844110607274",
        "simState": "0"
    }]
}

Full Example

Here is a full example:

MainActivity.java

package ltns.deviceinfo;

import android.os.Bundle;
import android.os.Environment;
import  android . os . Handler ;
import android.os.Message;
import android.support.v7.app.AppCompatActivity;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import ltns.deviceinfo.utils.FileUtils;
import ltns.deviceinfo.utils.JsonUtils;
import ltns.deviceinfolib.DeviceInfoManager;
import ltns.deviceinfolib.collector.BatteryInfoCollector;
import ltns.deviceinfolib.collector.BoardInfoCollector;
import ltns.deviceinfolib.collector.CameraInfoCollector;
import ltns.deviceinfolib.collector.CpuInfoCollector;
import ltns.deviceinfolib.collector.NfcInfoCollector;
import ltns.deviceinfolib.collector.PhoneBasicInfoCollector;
import ltns.deviceinfolib.collector.ScreenInfoCollector;
import ltns.deviceinfolib.collector.SensorInfoCollector;
import ltns.deviceinfolib.collector.SimInfoCollector;
import ltns.deviceinfolib.collector.StorageInfoCollector;
import ltns.deviceinfolib.collector.SystemInfoCollector;
import ltns.deviceinfolib.collector.UiInfoCollector;
import ltns.deviceinfolib.collector.base.BaseDeviceInfoCollector;
import ltns.deviceinfolib.listener.DeviceInfoCollectListener;

/**
 * @date 创建时间：2018/1/8
 * @author appzy
 * @Description 获取设备信息
 * @version
 */
public class MainActivity extends AppCompatActivity {
    private static final int ERROR = 0;
    private static final int ALL_DONE = 1;
    private static final int ALL_AUTO_COMPLETED = 2;
    private static final int SINGLE_SUCCEED = 3;
    private static final int SINGLE_FAILED = 4;

    private String outputStr = "";

    private TextView tv;
    private Button btnStart, btnSave;
    private Handler mHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case SINGLE_SUCCEED:
                    tv.setText(tv.getText() + "n" + JsonUtils.jsonFormatter(((BaseDeviceInfoCollector) msg.obj).getJsonInfo()));
                    break;
                case SINGLE_FAILED:
                    tv.setText(tv.getText() + "n" + msg.obj.toString());
                    break;
                case ALL_DONE:
                    Toast.makeText(MainActivity.this, "采集完成", Toast.LENGTH_SHORT).show();
                    outputStr = ((DeviceInfoManager) msg.obj).getDeviceJsonInfo();
//                    Log.i("--->", outputStr);
                    tv.setText("Manager的输出Json:n" + JsonUtils.jsonFormatter(outputStr));
                    break;

            }
        }
    };

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

    private void initView() {
        tv = (TextView) findViewById(R.id.textView);
        btnStart = (Button) findViewById(R.id.btn_start);
        btnStart.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                tv.setText("");
                tv.setText("每个模块的Json数据");
                collectDeviceInfo();
            }
        });
        btnSave = (Button) findViewById(R.id.btn_save);
        btnSave.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (TextUtils.isEmpty(outputStr)) {
                    Toast.makeText(MainActivity.this, "先收集再保存", Toast.LENGTH_SHORT).show();
                    return;
                }
                String path = Environment.getExternalStorageDirectory().getPath() + "/DeviceInfo/";
                String fileName="deviceInfo.json";
                FileUtils.saveJsonAsFile(JsonUtils.jsonFormatter(outputStr), path,fileName);
                Toast.makeText(MainActivity.this, "保存完成，保存路径为：" + path, Toast.LENGTH_SHORT).show();
            }
        });
    }

    private DeviceInfoCollectListener mDeviceInfoCollectListener = new DeviceInfoCollectListener() {
        @Override
        public void onStart() {
            Toast.makeText(MainActivity.this, "开始采集", Toast.LENGTH_SHORT).show();
        }

        @Override
        public void onSingleSuccess(BaseDeviceInfoCollector mCollector) {
            Message m = new Message();
            m.what = SINGLE_SUCCEED;
            m.obj = mCollector;
            mHandler.sendMessage(m);

        }

        @Override
        public void onSingleFailure(BaseDeviceInfoCollector mCollector, String mErrorInfo) {
            Message m = new Message();
            m.what = SINGLE_FAILED;
            m.obj = mErrorInfo + "-->" + mCollector.getJsonInfo();
            mHandler.sendMessage(m);
        }

        @Override
        public void onAllDone(DeviceInfoManager mDeviceInfoManager) {
            Message m = new Message();
            m.what = ALL_DONE;
            m.obj = mDeviceInfoManager;
            mHandler.sendMessage(m);
        }

        @Override
        public void onAutoAllDone(DeviceInfoManager mDeviceInfoManager) {
        }
    };
/**
 * @date 创建时间：2018/1/8
 * @author appzy
 * @Description 目前可获取的设备信息（只作为模板用途，建议使用时自行定制）
 * @version
 */
    private void collectDeviceInfo() {
        DeviceInfoManager.NewInstance(this)
                .addCollector(new PhoneBasicInfoCollector(this, "basic"))       //Andorid设备基本信息（PhoneBasicInfoCollector）
                .addCollector(new SimInfoCollector(this, "sim"))                //Sim卡信息（SimInfoCollector）同时识别多张Sim卡
                .addCollector(new CpuInfoCollector(this, "cpu"))                //Cpu信息（CpuInfoCollector）
                .addCollector(new BoardInfoCollector(this, "board"))            //主板信息（BoardInfoCollector）
                .addCollector(new BatteryInfoCollector(this, "battery"))        //电池信息（BatteryInfoCollector）
                .addCollector(new StorageInfoCollector(this, "storage"))        //存储信息（RAM & SD）（StorageInfoCollector）
                .addCollector(new CameraInfoCollector(this, "camera", true))    //摄像头信息（CameraInfoCollector）
                .addCollector(new ScreenInfoCollector(this, "screen"))          //屏幕信息（ScreenInfoCollector）
                .addCollector(new UiInfoCollector(this, "ui"))                  //Ui信息（UiInfoCollector）
                .addCollector(new SensorInfoCollector(this, "sensor"))          //传感器列表（SensorInfoCollector）
                .addCollector(new NfcInfoCollector(this, "nfc"))                //NFC信息（NfcInfoCollector）
                .addCollector(new SystemInfoCollector(this, "system"))          //系统相关信息（Build.prop等）
                .autoStartManualCollection(true)
                .bindListener(mDeviceInfoCollectListener)
                .start();
    }
}

Find full code here.

Reference

Read more here.
Follow code author here.
Download code here.