如何檢查AutoCompleteTextView是否包含文本？

Question

我在用戶應填寫的片段中有兩個AutoCompleteTextView。 然后，必須將這兩個字符串值發送到其他活動，否則（如果未填寫）您應該看到敬酒。 我嘗試實現它，但是不起作用：

public void onFindPathClick(View view) {
    String originAddress = OriginPlaceFragment.mAutoPlaceSearch.getText().toString();
    String destinationAddress = DestinationPlaceFragment.mAutoPlaceSearch.getText().toString();

    Intent intent = new Intent(SimpleTabsActivity.this, MapsActivity.class);
    if ((originAddress != "") && (!originAddress.equals(null)) && (destinationAddress != "") && (!destinationAddress.equals(null))) {
        intent.putExtra(ORIGIN_ADDRESS, originAddress);
        intent.putExtra(DESTIN_ADDRESS, destinationAddress);
        startActivity(intent);
    } else {
        Toast.makeText(this, "Fill \"from\" and \"to\" fields", Toast.LENGTH_SHORT).show();
    }
}

Answer 1

而不是檢查（originAddress！=“”），請使用isEmpty（）方法。

public void onFindPathClick(View view) {
String originAddress = OriginPlaceFragment.mAutoPlaceSearch.getText().toString();
String destinationAddress = DestinationPlaceFragment.mAutoPlaceSearch.getText().toString();

Intent intent = new Intent(SimpleTabsActivity.this, MapsActivity.class);
if (!originAddress.toString().isEmpty() && !destinationAddress.toString().isEmpty()) {
    intent.putExtra(ORIGIN_ADDRESS, originAddress);
    intent.putExtra(DESTIN_ADDRESS, destinationAddress);
    startActivity(intent);
} else {
    Toast.makeText(this, "Fill \"from\" and \"to\" fields", Toast.LENGTH_SHORT).show();
}
}