【Android 应用开发】Google 官方 EasyPermissions 权限申请库 ( 最简单用法 | 一行代码搞定权限申请 | 推荐用法 )

dependencies {
    // 使用 Android X 的应用添加该依赖
    implementation 'pub.devrel:easypermissions:3.0.0'
    // 使用 Android Support Library 支持库 , 添加该依赖
    implementation 'pub.devrel:easypermissions:2.0.1'
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="kim.hsl.easypermissions">
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.READ_CONTACTS" />
    <uses-permission android:name="android.permission.READ_SMS" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <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>

package kim.hsl.easypermissions
import android.Manifest
import android.os.Bundle
import android.util.Log
import android.view.View
import androidx.appcompat.app.AppCompatActivity
import pub.devrel.easypermissions.EasyPermissions
class MainActivitySimple : AppCompatActivity(){
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
    }
    fun onCLick(view : View){
        EasyPermissions.requestPermissions(
            this,
            "权限申请原理对话框 : 描述申请权限的原理",
            100,
    // 下面是要申请的权限 可变参数列表 
            Manifest.permission.CAMERA,
            Manifest.permission.ACCESS_FINE_LOCATION,
            Manifest.permission.READ_CONTACTS,
            Manifest.permission.READ_SMS,
            Manifest.permission.WRITE_EXTERNAL_STORAGE
        )
    }
}

package kim.hsl.easypermissions
import android.Manifest
import android.os.Bundle
import android.view.View
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import pub.devrel.easypermissions.AfterPermissionGranted
import pub.devrel.easypermissions.EasyPermissions
class MainActivitySimple2 : AppCompatActivity(){
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
    }
    fun onCLick(view : View){
        doSomethingWithPermissions()
    }
    @AfterPermissionGranted( 100 )
    fun doSomethingWithPermissions(){
        if(EasyPermissions.hasPermissions(this,
                Manifest.permission.CAMERA,
                Manifest.permission.ACCESS_FINE_LOCATION,
                Manifest.permission.READ_CONTACTS,
                Manifest.permission.READ_SMS,
                Manifest.permission.WRITE_EXTERNAL_STORAGE)){
            // 如果有上述权限, 执行该操作
            Toast.makeText(this, "权限申请通过", Toast.LENGTH_LONG).show()
        }else{
            // 如果没有上述权限 , 那么申请权限
            EasyPermissions.requestPermissions(
                this,
                "权限申请原理对话框 : 描述申请权限的原理",
                100,
                Manifest.permission.CAMERA,
                Manifest.permission.ACCESS_FINE_LOCATION,
                Manifest.permission.READ_CONTACTS,
                Manifest.permission.READ_SMS,
                Manifest.permission.WRITE_EXTERNAL_STORAGE
            )
        }
    }
}