如何在Android中获取当前位置的经纬度?
此示例演示如何在 Android 中获取当前位置的经纬度。
步骤 1 − 在 Android Studio 中创建一个新项目,转到文件 ⇒ 新建项目,并填写所有必需的详细信息以创建新项目。
步骤 2 − 将以下代码添加到 res/layout/activity_main.xml。
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:gravity="center" tools:context=".MainActivity"> <TextView android:id="@+id/showLocation" android:layout_width="wrap_content" android:layout_height="wrap_content" android:hint="Location" android:textSize="24sp" /> <Button android:id="@+id/btnGetLocation" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Get Location" /> </LinearLayout>
步骤 3 − 将以下代码添加到 src/MainActivity.java
import android.Manifest; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.pm.PackageManager; import android.location.Location; import android.location.LocationManager; import android.provider.Settings; import android.support.v4.app.ActivityCompat; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends AppCompatActivity { private static final int REQUEST_LOCATION = 1; Button btnGetLocation; TextView showLocation; LocationManager locationManager; String latitude, longitude; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ActivityCompat.requestPermissions( this, new String[] {Manifest.permission.ACCESS_FINE_LOCATION}, REQUEST_LOCATION); showLocation = findViewById(R.id.showLocation); btnGetLocation = findViewById(R.id.btnGetLocation); btnGetLocation.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { location nManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); if (!locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) { OnGPS(); } else { getLocation(); } } }); } private void OnGPS() { final AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setMessage("Enable GPS").setCancelable(false).setPositiveButton("Yes", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS)); } }).setNegativeButton("No", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dialog.cancel(); } }); final AlertDialog alertDialog = builder.create(); alertDialog.show(); } private void getLocation() { if (ActivityCompat.checkSelfPermission( MainActivity.this,Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission( MainActivity.this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) { ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, REQUEST_LOCATION); } else { Location locationGPS = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); if (locationGPS != null) { double lat = locationGPS.getLatitude(); double longi = locationGPS.getLongitude(); latitude = String.valueOf(lat); longitude = String.valueOf(longi); showLocation.setText("Your Location: " + "
" + "Latitude: " + latitude + "
" + "Longitude: " + longitude); } else { Toast.makeText(this, "Unable to find location.", Toast.LENGTH_SHORT).show(); } } } }
步骤 4 − 将以下代码添加到 androidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.sample"> <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/> <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>
让我们尝试运行您的应用程序。我假设您已将您的实际 Android 移动设备连接到您的计算机。要在 Android Studio 中运行应用程序,请打开您的一个项目活动文件,然后单击工具栏中的运行图标。选择您的移动设备作为选项,然后检查您的移动设备,它将显示您的默认屏幕 –
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