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字数统计: 360 | 阅读时长 ≈ 2

用于App是否打开通知选项，并且可跳转至相关Setting页面进行设置

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import android.app.AppOpsManager
import android.app.NotificationManager
import android.content.Context
import android.content.Intent
import android.net.Uri
import android.os.Build
import java.lang.reflect.InvocationTargetException

// NotificationUtils is a class that could judge notification status or not , 
// and could enableNotification
object NotificationUtils {

    private const val CHECK_OP_NO_THROW = "checkOpNoThrow"
    private const val OP_POST_NOTIFICATION = "OP_POST_NOTIFICATION"

    @JvmStatic
    fun enableNotification(context: Context) =
            Intent().apply {
                when {
                    Build.VERSION.SDK_INT >= Build.VERSION_CODES.O -> {
                        //android 8.0引导
                        action = "android.settings.APP_NOTIFICATION_SETTINGS"
                        putExtra("android.provider.extra.APP_PACKAGE", context.packageName)
                    }
                    Build.VERSION.SDK_INT in Build.VERSION_CODES.LOLLIPOP..Build.VERSION_CODES.N_MR1 -> {
                        //android 5.0-7.0
                        action = "android.settings.APP_NOTIFICATION_SETTINGS"
                        putExtra("app_package", context.packageName)
                        putExtra("app_uid", context.applicationInfo.uid)
                    }
                    Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP -> {
                        action = "android.settings.APPLICATION_DETAILS_SETTINGS"
                        data = Uri.fromParts("package", context.packageName, null)
                    }
                }
            }

    @JvmStatic
    fun areNotificationsEnabled(context: Context) = with(context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            areNotificationsEnabled()
        } else {
            isNotificationEnabled(context)
        }
    }

    private fun isNotificationEnabled(context: Context): Boolean {

        val mAppOps = context.getSystemService(Context.APP_OPS_SERVICE) as AppOpsManager
        val appInfo = context.applicationInfo
        val pkg = context.applicationContext.packageName
        val uid = appInfo.uid

        val appOpsClass: Class<*>? /* Context.APP_OPS_MANAGER */

        try {
            appOpsClass = Class.forName(AppOpsManager::class.java.name)
            val checkOpNoThrowMethod = appOpsClass!!.getMethod(CHECK_OP_NO_THROW, Integer.TYPE, Integer.TYPE, String::class.java)
            val opPostNotificationValue = appOpsClass.getDeclaredField(OP_POST_NOTIFICATION)
            val value = opPostNotificationValue.get(Int::class.java) as Int

            return checkOpNoThrowMethod.invoke(mAppOps, value, uid, pkg) as Int == AppOpsManager.MODE_ALLOWED
        } catch (e: ClassNotFoundException) {
            e.printStackTrace()
        } catch (e: NoSuchMethodException) {
            e.printStackTrace()
        } catch (e: NoSuchFieldException) {
            e.printStackTrace()
        } catch (e: InvocationTargetException) {
            e.printStackTrace()
        } catch (e: IllegalAccessException) {
            e.printStackTrace()
        }

        return false
    }
}

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字数统计: 160 | 阅读时长 ≈ 1

ScreenLogger – 一个简单可用的屏幕日志插件

How to Use it?

  1. Add it in your root build.gradle at the end of repositories:
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allprojects {
    repositories {
        ...
        maven { url 'https://jitpack.io' }
    }
}

Add the dependency

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dependencies {
    implementation 'com.github.BestDI:ScreenLogger:v1.0'
}

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发表于 | 分类于
字数统计: 2,217 | 阅读时长 ≈ 10

一，Fingerprint总体架构图

Fingerprint表层模块架构如下，只涉及Application,Framework,Frigerprintd以及FingerprintHal，不包含指纹的认证驱动；

Fp_communication

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字数统计: 3,556 | 阅读时长 ≈ 16

一、前言

SharedPreferences会从shared_prefs目录下的<name>.xml文件, 并将其以get/put的形式提供读写服务. 其中涉及到如下几个问题:

  1. 如何从磁盘读取配置到内存
  2. getXxx如何从内存中获取配置
  3. 最终配置如何从内存回写到磁盘
  4. 多线程/多进程是否会有问题
  5. 以及最佳实践
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发表于 | 分类于 ，
字数统计: 1,989 | 阅读时长 ≈ 10

一、概述

AndFix 是阿里系的一个轻量级热修复，热更新框架，只支持简单的method修改，没有res修复等臃肿功能。具体的实现是通过native进行原函数的指针替换，具有一次修复，持续有效的特性（当然是不清除app所有数据前提下）。AndFix has a native method art_replaceMethod in ART or dalvik_replaceMethod in Dalvik.

方法替换原理

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发表于 | 分类于 ，
字数统计: 2,828 | 阅读时长 ≈ 12

一 、简单概括

  • EventBus是一个Android/Java平台基于订阅与发布的同通信框架，不支持跨进程。可以用于Activity/Fragment/Thread/Service之间通信解耦，也可以用于多线程通信。
  • EventBus相对于BroadcastReceiver、Handler、接口回调的有点在于简单，事件的订阅和发布解耦，但是存在的问题也很明显，会有大量的Event类来管理
  • Event bus for Android and Java that simplifies communication between Activities, Fragments, Threads, Services, etc. Less code, better quality.
  • GITHUB直连
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