Android - 引导用户打开位置服务

文章目录

• 准备
• 项目
• 参考

准备

开发环境：

Android Studio 4.1.1
Build #AI-201.8743.12.41.6953283, built on November 5, 2020
Runtime version: 1.8.0_242-release-1644-b01 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Windows 10 10.0
GC: ParNew, ConcurrentMarkSweep
Memory: 1237M
Cores: 8
Registry: ide.new.welcome.screen.force=true, external.system.auto.import.disabled=true

项目

新建项目，选择 Empty Activity，在配置项目时，我选择的 Minimum SDK 是 API 16: Android 4.1 (Jelly Bean)

app\build.gradle 文件（这是默认的，我没有修改）：

plugins {id 'com.android.application'
}android {compileSdkVersion 30buildToolsVersion "30.0.3"defaultConfig {applicationId "com.example.gotoenablelocationservice"minSdkVersion 16targetSdkVersion 30versionCode 1versionName "1.0"testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"}buildTypes {release {minifyEnabled falseproguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'}}compileOptions {sourceCompatibility JavaVersion.VERSION_1_8targetCompatibility JavaVersion.VERSION_1_8}
}dependencies {implementation 'androidx.appcompat:appcompat:1.1.0'implementation 'com.google.android.material:material:1.1.0'implementation 'androidx.constraintlayout:constraintlayout:1.1.3'testImplementation 'junit:junit:4.+'androidTestImplementation 'androidx.test.ext:junit:1.1.1'androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}

编辑 src\main\res\layout\activity_main.xml 文件，删除原有的 TextView 元素，新增 Button 元素：

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".MainActivity"><Buttonandroid:id="@+id/button"android:layout_width="0dp"android:layout_height="wrap_content"android:layout_marginStart="16dp"android:layout_marginLeft="16dp"android:layout_marginTop="16dp"android:layout_marginEnd="16dp"android:layout_marginRight="16dp"android:text="Go To Enable Location Service"app:layout_constraintEnd_toEndOf="parent"app:layout_constraintStart_toStartOf="parent"app:layout_constraintTop_toTopOf="parent" />
androidx.constraintlayout.widget.ConstraintLayout>

编辑 MainActivity 文件（主要代码是第 51、57 行）：

package com.example.gotoenablelocationservice;import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;import android.content.Context;
import android.content.Intent;
import android.location.LocationManager;
import android.os.Bundle;
import android.provider.Settings;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;public class MainActivity extends AppCompatActivity {private static final int REQUEST_CODE_GPS = 1;private Button button = null;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initView();}@Overrideprotected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {super.onActivityResult(requestCode, resultCode, data);if (requestCode == REQUEST_CODE_GPS) {LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);if (locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {Toast.makeText(MainActivity.this, "用户打开定位服务", Toast.LENGTH_LONG).show();} else {Toast.makeText(MainActivity.this, "用户关闭定位服务", Toast.LENGTH_LONG).show();}}}private void initView() {button = (Button) findViewById(R.id.button);button.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);// https://developer.android.google.cn/guide/components/intents-filters?hl=zh-cn#ExampleSend// https://developer.android.google.cn/reference/android/content/Intent?hl=zh-cn#resolveActivity(android.content.pm.PackageManager)// 判断是否有合适的应用能够处理该 Intent，并且可以安全调用 startActivity()。if (intent.resolveActivity(getPackageManager()) != null) {startActivityForResult(intent, REQUEST_CODE_GPS);} else {Toast.makeText(MainActivity.this, "该设备不支持位置服务", Toast.LENGTH_SHORT).show();}}});}
}

参考

Android引导用户打开手机位置服务

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