获取当前坐标的Andr​​oid [英] Get current coordinates Android

问题描述

我有两个班的 MainActivity.java （主类）及 MyCurrentLoctionListener.java

I have two classes MainActivity.java (Main Class) & MyCurrentLoctionListener.java

我愿意当我运行我的应用程序，让我的当前地理位置（的onLoad-的onCreate）：

I am willing to get my current geo location when I run my app (onLoad-onCreate) :

我得到嗨::空

即使我定义为myLocation公开，所以MainActivity.java（主类），可以看到它。

MainActivity.java：

package com.example.test;

import android.location.LocationManager;
import android.os.Bundle;
import android.app.Activity;
import android.content.Context;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

Button btn1 = (Button) findViewById(R.id.make_folder);
TextView txt1 = (TextView) findViewById(R.id.textView1);

//import android.location.LocationManager;
LocationManager locationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
MyCurrentLoctionListener locationListener = new MyCurrentLoctionListener();
locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0,locationListener);    

txt1.setText("HI :: " + locationListener.myLocation);

btn1.setOnClickListener(new OnClickListener() {
public void onClick(View v) {   
}           
}); //setOnClickListener    
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}

MyCurrentLoctionListener.java：

package com.example.test;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;

public class MyCurrentLoctionListener implements LocationListener {

public String myLocation;

@Override
public void onLocationChanged(Location location) {
location.getLatitude();
location.getLongitude();



myLocation = "Latitude = " + location.getLatitude() + " Longitude = " + location.getLongitude();

}

@Override
public void onStatusChanged(String s, int i, Bundle bundle) {

}

@Override
public void onProviderEnabled(String s) {

}

@Override
public void onProviderDisabled(String s) {

}
}

权限已经包含在的Manifest.xml

推荐答案

当你开始你的活动，你的MyCurrentLoctionListener将无法得到位置的时候了。

When you start your activity, your MyCurrentLoctionListener will not be able to get the location right away.

这将是最好的TextView的传递到你的MyCurrentLoctionListener类是这样的：

It would be best to pass the TextView into your MyCurrentLoctionListener class like this:

public class MyCurrentLoctionListener implements LocationListener {

public String myLocation;
private TextView mTextView;

MyCurrentLoctionListener(TextView tv) {
    this.mTextView = tv;    
}

@Override
public void onLocationChanged(Location location) {
    location.getLatitude();
    location.getLongitude();

    mTextView.setText("Latitude = " + location.getLatitude() + " Longitude = " + location.getLongitude());

}

....

这篇关于获取当前坐标的Andr​​oid的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！