Java getLastLocation().addOnSuccessListener无法在按钮中工作
我想设置一个按钮,当我按下按钮,然后得到位置Java getLastLocation().addOnSuccessListener无法在按钮中工作,java,android,google-maps,android-fusedlocation,Java,Android,Google Maps,Android Fusedlocation,我想设置一个按钮,当我按下按钮,然后得到位置 FusedLocationProviderClient userLocationProviderClient = LocationServices.getFusedLocationProviderClient(this); 这可以在onCreate中运行,但我想设置一个按钮,当我按下按钮时, 然后显示用户位置。它不能工作。这是我的代码,我如何修复它 public class MainActivity extends AppCompatActivit
FusedLocationProviderClient userLocationProviderClient = LocationServices.getFusedLocationProviderClient(this);
这可以在onCreate中运行,但我想设置一个按钮,当我按下按钮时,
然后显示用户位置。它不能工作。这是我的代码,我如何修复它
public class MainActivity extends AppCompatActivity{
final private int userAgreePermissionCode = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// Check permission and go "onRequestPermissionsResult"
int currentPermission = ActivityCompat.checkSelfPermission(this,android.Manifest.permission.ACCESS_FINE_LOCATION);
if( currentPermission!=PackageManager.PERMISSION_GRANTED ) ActivityCompat.requestPermissions(this, new String[]{android.Manifest.permission.ACCESS_FINE_LOCATION}, userAgreePermissionCode);
findViewById(R.id.Locate).setOnClickListener(new View.OnClickListener() {
@SuppressLint("MissingPermission")
@Override
public void onClick(View v) {
// can't work
FusedLocationProviderClient userLocationProviderClient = LocationServices.getFusedLocationProviderClient(this); // Error in here!!
userLocationProviderClient.getLastLocation().addOnSuccessListener(new OnSuccessListener<Location>() {
@Override
public void onSuccess(Location location) {
Log.i("Longitude:", location.getLongitude()+"");
Log.i("Latitude:", location.getLatitude()+"");
}
});
}
});
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch (requestCode) {
case userAgreePermissionCode:
if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// Permission Granted
Log.i("Status:","Granted");
} else {
// Permission Denied
finish();
}
break;
default:
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
public类MainActivity扩展了AppCompatActivity{
最终私有int UserAgreementPermissionCode=1;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//检查权限并转到“onRequestPermissionsResult”
int currentPermission=ActivityCompat.checkSelfPermission(这是android.Manifest.permission.ACCESS\u FINE\u位置);
如果(currentPermission!=PackageManager.PERMISSION\u已授予)ActivityCompat.requestPermissions(这是新字符串[]{android.Manifest.PERMISSION.ACCESS\u FINE\u LOCATION},userAgreePermissionCode);
findviewbyd(R.id.Locate).setOnClickListener(新视图.OnClickListener()){
@SuppressLint(“丢失许可”)
@凌驾
公共void onClick(视图v){
//不行
FusedLocationProviderClient userLocationProviderClient=LocationServices.getFusedLocationProviderClient(此);//此处出错!!
userLocationProviderClient.getLastLocation().addOnSuccessListener(新OnSuccessListener()){
@凌驾
成功时的公共无效(位置){
Log.i(“经度:”,location.getLongitude()+);
Log.i(“Latitude:,location.getLatitude()+”);
}
});
}
});
}
@凌驾
public void onRequestPermissionsResult(int-requestCode,@NonNull-String[]permissions,@NonNull-int[]grantResults){
开关(请求代码){
案例用户协议许可代码:
if(grantResults[0]==已授予PackageManager.权限){
//准许
日志i(“状态:”,“授予”);
}否则{
//拒绝许可
完成();
}
打破
违约:
super.onRequestPermissionsResult(请求代码、权限、授权结果);
}
}
}它不起作用,因为该范围内的
此引用了视图.OnClientListener的实例
您可以通过放置main活动来修复它。改为使用此
,或者您可以将FusedLocationProviderClient
作为成员字段,在onCreate
中实例化它,然后在您的click listener中使用它。它不起作用,因为该范围中的此
引用了视图的实例。OnClientListener
您可以通过放置MainActivity来修复它。改为使用此
,或者您可以将FusedLocationProviderClient
作为成员字段,在onCreate
中实例化它,然后在单击侦听器中使用它。仅更改此项
FusedLocationProviderClient userLocationProviderClient = LocationServices.getFusedLocationProviderClient(Location.this); // hear give your activity name
只有改变这件事
FusedLocationProviderClient userLocationProviderClient = LocationServices.getFusedLocationProviderClient(Location.this); // hear give your activity name
可能的重复可能的重复