Problem in dropDownWidth of Spinner

به جای MATCH_PARRENT باید از getWidth() استفاده کنین
این متد پایین رو یکم چکش کاریش کنین تا اون چیزی که میخواین در بیاد...

  private void initializeDropdownWidth() {
        final ArrayAdapter<String> adapter = (ArrayAdapter<String>) txtSpinner.getAdapter();
        txtSpinner.setAdapter(null);
        if (txtSpinner.getVisibility() == VISIBLE) {
            for (int x = 0; x < adapter.getCount(); x++) {
                TextView text = (TextView) adapter.getView(x, null, null);
                text.measure(0, 0);
                int width = text.getMeasuredWidth();
                if (width > maxDropdownWidth) {
                    maxDropdownWidth = width;
                }
            }
            Handler handler = new Handler();
            handler.postDelayed(new Runnable() {

                @Override
                public void run() {
                    if (txtSpinner.getWidth() != 0) {
                        if (maxDropdownWidth + 150 < txtSpinner.getWidth()) {
                            txtSpinner.setDropDownWidth(txtSpinner.getWidth() - 150);
                            txtSpinner.setDropDownHorizontalOffset(txtSpinner.getWidth() / 2 - txtSpinner.getDropDownWidth() / 2);
                        } else if (maxDropdownWidth > txtSpinner.getWidth()) {
                            if (maxDropdownWidth + 20 < context.getResources().getDisplayMetrics().widthPixels) {
                                txtSpinner.setDropDownWidth(maxDropdownWidth + 20);
                            } else {
                                txtSpinner.setDropDownWidth(context.getResources().getDisplayMetrics().widthPixels);
                            }
                        }
                        txtSpinner.setDropDownVerticalOffset( -1 * txtSpinner.getHeight());
                    }
                    txtSpinner.setAdapter(adapter);
                }
            }, 200);
        }

    }

متشکرم بابت پاسخ کدشو میزارم که کسی خواست استفاده کنه ، ممنون

public class MainActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener {

    Spinner sp_angle;
    private int maxDropdownWidth = 1500;
    private Context context;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        context = MainActivity.this;

        sp_angle = findViewById(R.id.sp_angle);

        final ArrayAdapter<String> adapter = (ArrayAdapter<String>) sp_angle.getAdapter();
        sp_angle.setAdapter(null);
        if (sp_angle.getVisibility() == VISIBLE) {
            for (int x = 0; x < adapter.getCount(); x++) {
                TextView text = (TextView) adapter.getView(x, null, null);
                text.measure(0, 0);
                int width = text.getMeasuredWidth();
                if (width > maxDropdownWidth) {
                    maxDropdownWidth = width;
                }
            }
            Handler handler = new Handler();
            handler.postDelayed(new Runnable() {

                @Override
                public void run() {
                    if (sp_angle.getWidth() != 0) {
                        if (maxDropdownWidth + 150 < sp_angle.getWidth()) {
                            sp_angle.setDropDownWidth(sp_angle.getWidth() - 150);
                            sp_angle.setDropDownHorizontalOffset(sp_angle.getWidth() / 2 - sp_angle.getDropDownWidth() / 2);
                        } else if (maxDropdownWidth > sp_angle.getWidth()) {
                            if (maxDropdownWidth + 20 < context.getResources().getDisplayMetrics().widthPixels) {
                                sp_angle.setDropDownWidth(maxDropdownWidth + 20);
                            } else {
                                sp_angle.setDropDownWidth(context.getResources().getDisplayMetrics().widthPixels);
                            }
                        }
                        sp_angle.setDropDownVerticalOffset( -1 * sp_angle.getHeight());
                    }

                    sp_angle.setAdapter(adapter);
                }
            }, 200);
        }
        sp_angle.setOnItemSelectedListener(this);

    }


    @Override
    public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
        String text = parent.getItemAtPosition(position).toString();
        Toast.makeText(parent.getContext(),text,Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onNothingSelected(AdapterView<?> parent) {

    }
}