为什么我的 android studio 应用程序可以在 API 34 中工作，但不能在 API 33 及以下版本中工作

Question

我正在尝试制作一个应用程序，它将获取当前用户的纬度和经度位置，并生成包含坐标的通知。但是，我的应用程序可以在 API 34 中运行，但不能在 API 33 及以下版本中运行，即使降级依赖版本后，构建也完成了，但单击按钮时没有任何输出。

这是MainActivity.kt 文件：

package com.velvetthunder.driverlocation

import android.Manifest
import android.content.pm.PackageManager
import android.location.Location
import android.os.Bundle
import android.widget.Button
import android.widget.TextView
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import com.google.android.gms.location.FusedLocationProviderClient
import com.google.android.gms.location.LocationServices

class MainActivity : AppCompatActivity() {

    private val REQUEST_CODE = 101
    private lateinit var fusedLocationProviderClient: FusedLocationProviderClient
    private lateinit var currentLocation: Location

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        fusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this)
        fetchLastLocation()
        }

    private fun fetchLastLocation() {
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.ACCESS_FINE_LOCATION), REQUEST_CODE)
            return
        }
        val task = fusedLocationProviderClient.lastLocation
        task.addOnSuccessListener { location ->
            if (location != null) {
                currentLocation = location
                findViewById<Button>(R.id.button)
                    .setOnClickListener {
                        Toast.makeText(applicationContext, "${currentLocation.latitude},${currentLocation.longitude}", Toast.LENGTH_SHORT).show()
                    }
            }
        }
    }

    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<String>, grantResults: IntArray) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
        when (requestCode) {
            REQUEST_CODE -> {
                if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    fetchLastLocation()
                }
            }
        }
    }
}

这是 build.gradle.kts 文件：

plugins {
    id("com.android.application")
    id("org.jetbrains.kotlin.android")
}

android {
    namespace = "com.velvetthunder.driverlocation"
    compileSdk = 33

    defaultConfig {
        applicationId = "com.velvetthunder.driverlocation"
        minSdk = 21
        targetSdk = 33
        versionCode = 1
        versionName = "1.0"

        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            isMinifyEnabled = false
            proguardFiles(
                getDefaultProguardFile("proguard-android-optimize.txt"),
                "proguard-rules.pro"
            )
        }
    }
    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_1_8
        targetCompatibility = JavaVersion.VERSION_1_8
    }
    kotlinOptions {
        jvmTarget = "1.8"
    }
}

dependencies {

    implementation("com.google.android.gms:play-services-location:18.0.0")
    implementation("androidx.core:core-ktx:1.10.0")
    implementation("androidx.appcompat:appcompat:1.6.1")
    implementation("com.google.android.material:material:1.5.0")
    testImplementation("junit:junit:4.13.2")
    androidTestImplementation("androidx.test.ext:junit:1.1.5")
    androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
}

这是 AndroidManifest.xml 文件：

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

    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

    <application
        android:allowBackup="true"
        android:dataExtractionRules="@xml/data_extraction_rules"
        android:fullBackupContent="@xml/backup_rules"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/Theme.DriverLocation"
        tools:targetApi="33"
        android:requestLegacyExternalStorage="true">
        <activity
            android:name=".MainActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>

这是我第一次使用 Android Studio，因此非常感谢任何帮助。

Answer 1

您没有请求粗略的许可。

您应该首先请求 COARSE 许可。

一旦你获得它，就去FINE