问清除EditText文本的微调onItemSelected

EN

public class TestActivity extends Activity implements 
AdapterView.OnItemSelectedListener {
...
Spinner spinner;
EditText ed1;
...
protected void onCreate(Bundle savedInstanceState) {
...
...    
spinner = (Spinner) findViewById(R.id.spinner1);
ed1 = (EditText)findViewById(R.id.ed1);
...
adapter = new ArrayAdapter<String>(this,R.layout.temp_layout01,R.id.temptxt01,xNames);
spinner.setAdapter(adapter);
spinner.setSelection(getSpinnerIndex(spinner,mname));
spinner.setOnItemSelectedListener(this);
}

private void clearAllFields() {
            Log.i(TAG, "Clearing Fields");
            ed1.getText().clear(); //test that didn't clear the data
            ed1.setText(null); // test that didn't clear the data
    }

public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
    clearAllFields();
    mname = parent.getItemAtPosition(position).toString();
    mID = dbHelper.getCurrentData(mname);
    spinner.setSelection(getSpinnerIndex(spinner,mname));
    populateData();
}

<TableRow
            android:id="@+id/tbHole18TR"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" >
           <EditText
                android:layout_width="50dp"
                android:layout_height="wrap_content"
                android:inputType="number"
                android:ems="10"
                android:id="@+id/ed1"
                android:background="@color/Green3"
                android:textAlignment="center" />
        </TableRow>