https://stackoverflow.com/questions/43123544/

README.md

STEPS TO GRANT android.permission.PACKAGE_USAGE_STATS

1. Build and launch app (notice log message, permission is denied)
2. Open terminal and run the following command:

 adb shell pm grant com.jaredrummler.usagestatsperm android.permission.PACKAGE_USAGE_STATS

3. Re-open the app (log message now prints granted)

Log:

D/MainActivity: mode: 3, granted = true, usageStatsSize: 16246

AndroidManifest.xml

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

  <uses-permission android:name="android.permission.PACKAGE_USAGE_STATS"
      tools:ignore="ProtectedPermissions"/>

  <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>

build.gradle

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 27
    defaultConfig {
        applicationId "com.jaredrummler.usagestatsperm"
        minSdkVersion 23
        targetSdkVersion 27
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation"org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
    implementation 'com.android.support:appcompat-v7:27.1.1'
    implementation 'com.android.support.constraint:constraint-layout:1.1.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}

MainActivity.kt

import android.Manifest.permission.PACKAGE_USAGE_STATS
import android.app.AppOpsManager
import android.app.usage.UsageStatsManager
import android.content.Context
import android.content.pm.PackageManager.PERMISSION_GRANTED
import android.os.Build.VERSION
import android.os.Build.VERSION_CODES
import android.os.Bundle
import android.support.v7.app.AppCompatActivity
import android.util.Log
import java.util.Calendar

class MainActivity : AppCompatActivity() {

  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    val appOps = getSystemService(Context.APP_OPS_SERVICE) as AppOpsManager
    val mode = appOps.checkOpNoThrow(AppOpsManager.OPSTR_GET_USAGE_STATS,
        android.os.Process.myUid(), packageName)
    val granted: Boolean
    if (mode == AppOpsManager.MODE_DEFAULT) {
      granted = (checkCallingOrSelfPermission(PACKAGE_USAGE_STATS) == PERMISSION_GRANTED)
    } else {
      granted = (mode == AppOpsManager.MODE_ALLOWED);
    }

    val usm = getSystemService(USAGE_STATS_SERVICE) as UsageStatsManager
    val calendar = Calendar.getInstance()
    val toTime = calendar.timeInMillis
    calendar.add(Calendar.YEAR, -1)
    val fromTime = calendar.timeInMillis
    val queryUsageStats = usm.queryUsageStats(UsageStatsManager.INTERVAL_YEARLY, fromTime, toTime)

    Log.d("MainActivity", "mode: $mode, granted = $granted, usageStatsSize: ${queryUsageStats.size}")
  }
}