吐司未显示在Google Map Android中

Question

这是该按钮的XML文件

 <android.support.design.widget.FloatingActionButton
        android:id="@+id/fab"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom|start"
        android:layout_margin="@dimen/fab_margin"
        android:src="@drawable/ic_action_search"
        app:fabSize="normal"
        android:onClick="onSearch"/>

这是Java代码

 public void onSearch(View view) {
        to = (EditText) findViewById(R.id.to);
        String locate = to.getText().toString();
        List<Address> addressList = null;
        if (locate != null || !locate.equals("")) {
            Geocoder geocoder = new Geocoder(getApplicationContext());
            try {
                addressList = geocoder.getFromLocationName(locate, 1);
            } catch (IOException e) {
                e.printStackTrace();
            }
            Address address = addressList.get(0);
            LatLng latLng = new LatLng(address.getLatitude(), address.getLongitude());
            m = mMap.addMarker(new MarkerOptions().position(latLng));
            mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
            mMap.animateCamera(CameraUpdateFactory.zoomTo(15));
        } else {
            Toast.makeText(MapsActivity.this, "Please enter a valid location", Toast.LENGTH_LONG).show();
        }
    }

当TextField为空并且单击按钮时，它应该显示敬酒，但是单击按钮后，它不起作用

Answer 1

尝试在onCreate((

中建议的方法之外找到您的文本视图

        to = (EditText) findViewById(R.id.to);
public void onSearch(View view) {
        String locate = to.getText().toString();
        List<Address> addressList = null;
        if (locate != null || !locate.equals("")) {
            Geocoder geocoder = new Geocoder(getApplicationContext());
            try {
                addressList = geocoder.getFromLocationName(locate, 1);
            } catch (IOException e) {
                e.printStackTrace();
            }
            Address address = addressList.get(0);
            LatLng latLng = new LatLng(address.getLatitude(), address.getLongitude());
            m = mMap.addMarker(new MarkerOptions().position(latLng));
            mMap.moveCamera(CameraUpdateFactory.newLatLng(latLng));
            mMap.animateCamera(CameraUpdateFactory.zoomTo(15));
        } else {
            Toast.makeText(MapsActivity.this, "Please enter a valid location", Toast.LENGTH_LONG).show();
        }
    }