我创建了一个应用程序,当我点击一个按钮时,它会给我我的gps坐标。在模拟器中它没有问题,但是当我在移动电话上尝试时,接下来有两种情况:当我激活GPS时,没有发生任何事情,当我没有连接GPS时,它说“Gps禁用”
到目前为止,这是我的代码: 这是.java文件:(Saver.java):
package com.example.lifesaver;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class Saver extends Activity {
Button b;
Location newLocation = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_saver);
b = (Button) findViewById(R.id.button1);
// We use LocationManager class to obtain GPS locations
LocationManager mlocManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
LocationListener mlocListener = new MyLocationListener();
mlocManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, 0, 0, mlocListener);
b.setOnClickListener(new OnClickListener(){
public void onClick(View v)
{
if (newLocation != null) {
String Text = "Current location is: " + "Latitud = "
+ newLocation.getLatitude() + "Longitud = "
+ newLocation.getLongitude();
Toast.makeText(getApplicationContext(), Text,
Toast.LENGTH_SHORT).show();
}
}
});
}
//MyLocationListener class
public class MyLocationListener implements LocationListener
{
public void onLocationChanged(Location loc)
{
newLocation = loc;
}
public void onProviderDisabled(String provider)
{
Toast.makeText(getApplicationContext(), "Gps Disabled", Toast.LENGTH_SHORT).show();
}
public void onProviderEnabled(String provider)
{
Toast.makeText(getApplicationContext(), "Gps Enabled", Toast.LENGTH_SHORT).show();
}
public void onStatusChanged(String provider, int status, Bundle extras)
{
}
}
}
.xml文件(activity_saver.xml):
<RelativeLayout 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:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".Saver" >
<Button
android:id="@+id/button1"
android:layout_width="60dp"
android:layout_height="60dp"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:background="@drawable/circle"
android:onClick="onClick"/>
</RelativeLayout>
另外,我在AndroidManifest.xml文件中添加了这个:
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION">
</uses-permission>
答案 0 :(得分:0)
您是否尝试以编程方式开启GPS?
它不适用于版本4.0以上。你必须手动打开它。
使用我的代码: -
Android - How to get the user current location every time based on sim Network
答案 1 :(得分:0)
您必须等待GPS才能获得修复。冷启动后几分钟内可能无法触发onLocationChanged。如果您在建筑物内,您可能从不获得修复。没有“立即通过GPS获取我的位置”这样的设施。