Android Open Source - YOW2014-Android-MVVM Search Activity

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License

The source code is released under:
MIT License
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Java Source Code

package com.adilmughal.demo.yow.searchd.traditional.activity;
//from   ww w .  j  a v  a 2s  .  co m
import java.util.List;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.ProgressBar;
import android.widget.TextView;

import com.adilmughal.demo.yow.searchd.traditional.R;
import com.adilmughal.demo.yow.searchd.traditional.contract.SearchRepository;
import com.adilmughal.demo.yow.searchd.traditional.repository.DummySearchRepository;

public class SearchActivity extends Activity {

  private EditText keywordsEditText;
  private Button submitButton;
  private CheckBox includeLocationCheckBox;
  private EditText locationEditText;
  private TextView validationMessageTextView;
  private ListView searchListView;

  private ProgressBar progressBar;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_search);
    this.initializeViewFields();
    this.setupListeners();
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.search, menu);
    return true;
  }

  private void initializeViewFields() {
    this.keywordsEditText = (EditText) this.findViewById(R.id.activity_search_keywords_edittext);
    this.submitButton = (Button) this.findViewById(R.id.activity_search_submit_button);
    this.includeLocationCheckBox = (CheckBox) this.findViewById(R.id.activity_search_location_include_checkbox);
    this.locationEditText = (EditText) this.findViewById(R.id.activity_search_location_edittext);
    this.validationMessageTextView = (TextView) this.findViewById(R.id.activity_search_validation_message_view);
    this.progressBar = (ProgressBar) this.findViewById(R.id.activity_search_progress);
    this.searchListView = (ListView) this.findViewById(R.id.activity_search_result_list_view);
  }

  private void setupListeners() {
    this.submitButton.setOnClickListener(new OnClickListener() {

      @Override
      public void onClick(View view) {
        if (validateSearchParams()) {
          new PerformSearchAsyncTask().execute(keywordsEditText.getText().toString());
        }
      }
    });

    this.includeLocationCheckBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {

      @Override
      public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
        if (isChecked)
          locationEditText.setVisibility(View.VISIBLE);
        else
          locationEditText.setVisibility(View.INVISIBLE);

      }
    });

  }

  private void showValidationErrorMessage(String errorMessage) {
    this.validationMessageTextView.setText(errorMessage);
    this.validationMessageTextView.setVisibility(View.VISIBLE);
    this.validationMessageTextView.bringToFront();
    this.validationMessageTextView.postDelayed(new Runnable() {

      @Override
      public void run() {
        validationMessageTextView.setVisibility(View.GONE);

      }
    }, 3000);

  }

  private boolean validateSearchParams() {
    boolean isValid = true;
    StringBuilder errorMessageBuilder = new StringBuilder();

    if (keywordsEditText.getText().length() <= 2) {
      isValid = false;
      errorMessageBuilder.append("- Try entering more characters as keywords!");
    }

    if (this.includeLocationCheckBox.isChecked()) {
      if (this.locationEditText.getText().length() != 4) {
        isValid = false;

        if (errorMessageBuilder.length() > 0)
          errorMessageBuilder.append("\n");

        errorMessageBuilder.append("- Invalid location, enter 4 digit postcode!");
      }
    }

    if (!isValid)
      this.showValidationErrorMessage(errorMessageBuilder.toString());

    return isValid;
  }

  private void bindDataWithResult(List<String> result) {
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, result);
    this.searchListView.setAdapter(adapter);
  }

  private class PerformSearchAsyncTask extends AsyncTask<String, Void, List<String>> {

    @Override
    protected List<String> doInBackground(String... keywords) {
      SearchRepository repo = new DummySearchRepository();
      return repo.getData(keywords[0]);
    }

    @Override
    protected void onPostExecute(List<String> result) {
      if (result != null && result.size() > 0) {
        progressBar.setVisibility(View.INVISIBLE);
        bindDataWithResult(result);
        searchListView.setVisibility(View.VISIBLE);
      }

    }

    @Override
    protected void onPreExecute() {
      progressBar.setVisibility(View.VISIBLE);
      searchListView.setVisibility(View.GONE);
    }

  }
}
Java Source Code List
