Custom AutoCompletevView like facebook comments field in android

Question

I want to make custom AutoCompleteView like this..

It should be populated when my special character is added (like facebook.. When you type @B then all friends those name starts with 'B' will be populated and we can select name).

It should not be populate while typing until '@' is added.

When '@' is added autocompleteview is dropped down and we can select name and after selecting it will be appended.

I found this but not satisfied. I need clue. They have implemented...like when you type '@' dropdown populates.But I have to customize more. Right now I need help if other is having idea or any in-completed source.

I have to try myself but let me ask before implementing customview to save my time.

Answer 1

You have to make custom autocompleteview by extending class.. and code mentioned in your question to be changed.

public class CustomAutoComplete extends AutoCompleteTextView {
private String previous = "";
private String seperator = "@";
boolean isState = false;

public CustomAutoComplete(final Context context, final AttributeSet attrs,
        final int defStyle) {
    super(context, attrs, defStyle);
    this.setThreshold(1);

}

public CustomAutoComplete(final Context context, final AttributeSet attrs) {
    super(context, attrs);
    this.setThreshold(1);
}

public CustomAutoComplete(final Context context) {
    super(context);
    this.setThreshold(1);
}

/**
 * This method filters out the existing text till the separator and launched
 * the filtering process again
 */
@Override
protected void performFiltering(final CharSequence text, final int keyCode) {
    String filterText = text.toString().trim();
    String lastchar = filterText.substring(filterText.length() - 1,
            filterText.length());
    if (filterText.length() == 1) {
        if (lastchar.equals(seperator)) {
            isState = true;
        } else {
            isState = false;
        }
    }
    previous = filterText.substring(0,
            filterText.lastIndexOf(getSeperator()) + 1);

    filterText = filterText.substring(filterText
            .lastIndexOf(getSeperator()) + 1);

    if ((lastchar.equals(seperator)) || isState) {
        super.performFiltering(filterText, keyCode);

        isState = true;

    }
}

/**
 * After a selection, capture the new value and append to the existing text
 */
@Override
protected void replaceText(final CharSequence text) {
    isState = false;
    super.replaceText(previous + text);// + getSeperator());

}

public String getSeperator() {
    return seperator;
}

public void setSeperator(final String seperator) {
    this.seperator = seperator;
}

}

Hope this will help you...