[問題] GPS定位模擬器可以運作手機不行??

[jerryxin (jerry)]

我想問大家
我寫的Android   讀取當前GPS的程式

寫好後,在Android模擬器上能運作
但是在Android手機上讀不出值(手機定位有打開,Android9.0 華碩手機)


public class MainActivity extends AppCompatActivity implements
LocationListener {
    public static final String TAG = "MainActivity";
    private TextView tvLocation;
    private TextView tvUpdateCounts;
    private LocationManager locationManager;
    private int count;
    private static final int REQUEST_LOCATION = 10;
    Double longitude;
    Double latitude;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tvLocation = (TextView) findViewById(R.id.tvLocation);
        tvUpdateCounts = (TextView) findViewById(R.id.tvUpdateCounts);



        if(Build.VERSION.SDK_INT> Build.VERSION_CODES.M){
            if (checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION)
!= PackageManager.PERMISSION_GRANTED &&
checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) !=
PackageManager.PERMISSION_GRANTED) {
                ActivityCompat.requestPermissions(this, new
String[]{Manifest.permission.ACCESS_FINE_LOCATION},
                        REQUEST_LOCATION);
                return;
            }

        }

        locationManager = (LocationManager)
getSystemService(Context.LOCATION_SERVICE);
      // Location location1 =
locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
     //   tvLocation.setText("經度:"+location1.getLongitude()+"緯度:
"+location1.getLatitude());


        locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER,
5000, 0, this);

        //tvLocation.setText("經緯度
"+.getLongitude()+","+location.getLongitude());

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is
present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onLocationChanged(Location location) {
        Log.i(TAG,"onLocationChanged");
        count++;
        longitude=location.getLongitude();
        latitude=location.getLatitude();
        tvLocation.setText("經緯度"+longitude+","+latitude);
        tvUpdateCounts.setText("更新次數:"+count);
    }

    @Override
    public void onStatusChanged(String s, int i, Bundle bundle) {
        Log.i(TAG,"onStatusChanged"+ tvLocation.toString());
    }

    @Override
    public void onProviderEnabled(String s) {
        Log.i(TAG,"onProviderEnabled");
    }

    @Override
    public void onProviderDisabled(String s) {
        Log.i(TAG,"onLocationChanged");

    }
}

Layout:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">


    <TextView
        android:id="@+id/tvLocation"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="經緯度"
        android:textSize="24sp" />

    <TextView
        android:id="@+id/tvUpdateCounts"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/tvLocation"
        android:text="更新次數"
        android:textSize="24sp" />
</RelativeLayout>


在模擬器上GPS位置有顯示出來
但在手機上都沒出來
這不知道是什麼原因???
煩請高手解答

--
※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 172.58.27.173 (美國)
※ 文章網址: https://www.ptt.cc/bbs/AndroidDev/M.1570575288.A.B2A.html
→ kobe8112: Logcat說啥?