import android.widget.Toast;
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//使用的地方1
showTextToast(getString(R.string.toast_irregular_number));

//使用的地方2
showTextToast(getString(R.string.toast_irregular_number2));
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private Toast toast = null;

private void showTextToast(String msg) {
if (toast == null) {
toast = Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_SHORT);
} else {
toast.setText(msg);
}
toast.show();
}