Android Open Source - sloop Text Filter Fragment

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License

The source code is released under:

NON-LICENSE The Sloop data-browser source code is hereby released into the Public Domain. The original author, David Megginson, Megginson Technologies Ltd., and Acclar Open Ltd. provide no warranty:...

Java Source Code

package com.megginson.sloop.activities;
/*  w ww  .j  a  v  a  2s .  c o m*/
import com.megginson.sloop.R;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

/**
 * Activity fragment for the text search filter.
 * 
 * This fragment encapsulates part of the layout for MainActivity, including the
 * search field at the top (which starts hidden).
 * 
 * @author David Megginson
 */
public class TextFilterFragment extends Fragment {

  private MainActivity mActivity;
  private ViewGroup mLayout;
  private EditText mTextField;
  private Button mCancelButton;

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
      Bundle savedInstanceState) {
    mActivity = (MainActivity) getActivity();
    mLayout = (ViewGroup) inflater.inflate(R.layout.fragment_text_filter,
        container);
    setupTextField();
    setupCancelButton();
    setShown(false);
    return mLayout;
  }

  /**
   * Clear the text in the field.
   */
  public void clear() {
    mTextField.setText(null);
  }

  /**
   * Set the visibility of the text filter.
   * 
   * @param isShown
   *            true to show the filter; false otherwise.
   */
  public void setShown(boolean isShown) {
    if (isShown) {
      mLayout.setVisibility(View.VISIBLE);
    } else {
      mLayout.setVisibility(View.GONE);
    }
  }

  /**
   * Indicate whether the text filter is visible.
   * 
   * @return true if the filter is visible.
   */
  public boolean isShown() {
    return (mLayout.getVisibility() == View.VISIBLE);
  }

  /**
   * Set up the edit field for the filter.
   *
   */
  private void setupTextField() {
    mTextField = (EditText) mLayout.findViewById(R.id.field_filter);
    
    // the enter button submits the search text
    mTextField
        .setOnEditorActionListener(new TextView.OnEditorActionListener() {
          @Override
          public boolean onEditorAction(TextView v, int actionId,
              KeyEvent event) {
            mActivity.doSetTextFilter(v.getText().toString());
            ActivitiesUtil.doHideKeyboard(mActivity, mTextField);
            return true;
          }
        });
  }

  /**
   * Set up the cancel button in the text field.
   */
  private void setupCancelButton() {
    mCancelButton = (Button) mLayout.findViewById(R.id.button_filter_clear);
    
    // first click clears; second click closes
    mCancelButton.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        // clear the filter either way
        mActivity.doSetTextFilter(null);
        if (mTextField.getText().length() == 0) {
          setShown(false);
        } else {
          clear();
        }
      }
    });
  }

}

Java Source Code List

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