我一直在关注本教程（https://www.youtube.com/watch?v=QNb_3QKSmMk&t=424s）以获得GPS坐标。虽然本教程介绍了如何在活动中获取坐标，但我想在滑动选项卡片段中实现此功能。 在清单文件中，我使用了权限：
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="com.google.android.providers.gsf.permission.READ_GSERVICES"/>
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
这是Activity类：
public class SwipeActivity extends AppCompatActivity {
private SectionsPagerAdapter mSectionsPagerAdapter;
private ViewPager mViewPager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_swipe);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
mSectionsPagerAdapter = new SectionsPagerAdapter(getSupportFragmentManager());
mViewPager = (ViewPager) findViewById(container);
mViewPager.setAdapter(mSectionsPagerAdapter);
}
public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return new Fragment1();
case 1:
return new Fragment2();
case 2:
return new Fragment3();
default:
return null;
}
}
@Override
public int getCount() {
return 3;
}
@Override
public CharSequence getPageTitle(int position) {
switch (position) {
case 0:
return "SECTION 1";
case 1:
return "SECTION 2";
case 2:
return "SECTION 3";
}
return null;
}
}
}
这是Fragment类，我想在其中获得GPS坐标：
public class Fragment2 extends Fragment {
TextView tv_gps;
Button gpsBtn;
LocationManager locationManager;
LocationListener locationListener;
public Fragment2() {
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
final View rootView = inflater.inflate(R.layout.fragment_filter, container, false);
tv_gps = (TextView) rootView.findViewById(R.id.tv_eventDemo);
gpsBtn = (Button) rootView.findViewById(R.id.btn_gps);
locationManager = (LocationManager) getActivity().getSystemService(Context.LOCATION_SERVICE);
locationListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
tv_gps.append("\n"+location.getLatitude()+" "+location.getLongitude());
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivity(intent);
}
};
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(getActivity(),new String[]{
Manifest.permission.ACCESS_FINE_LOCATION,Manifest.permission.ACCESS_COARSE_LOCATION,
Manifest.permission.INTERNET
},10);
}
else{
}
}
else {
configureButton();
}
return rootView;
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch (requestCode){
case 10:
if (grantResults.length>0 && grantResults[0] == PackageManager.PERMISSION_GRANTED){
configureButton();
return;
}
}
}
private void configureButton() {
gpsBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 5000, 0, locationListener);
}
});
}
}
这里，行locationManager.requestLocationUpdates（LocationManager.NETWORK_PROVIDER，5000,0，locationListener）;即使我已经处理了上述权限检查，也会出错。
请有人帮帮我。有没有更好的方法来检索片段中的GPS坐标？我只是想在点击按钮后将坐标附加到textView。