Android Open Source - Android-Media-Library Text Search Adapter

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Back to project page Android-Media-Library.

License

The source code is released under:

Apache License

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Java Source Code

package grevian.MediaLibrary;
// w ww. jav  a  2s. com
import android.content.ContentResolver;
import android.database.Cursor;
import android.graphics.Color;
import android.net.Uri;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.View.OnKeyListener;
import android.widget.BaseAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;

public class TextSearchAdapter extends BaseAdapter implements OnKeyListener {
  
  private final static String TAG = "GrevianMedia";
  private ListView _list;
  private EditText _text;
  private Uri _searchUri;
  private ContentResolver cr;
  private Cursor _cursor;
  
  public TextSearchAdapter(ListView mList, EditText mText, ContentResolver contentResolver)
  {  
    cr = contentResolver;
    
    _list = mList;
    _text = mText;
    
    _searchUri = Media.SEARCH_URI;
    Uri currentUri = _searchUri.buildUpon().appendPath( _text.getText().toString() ).build();
    _cursor = cr.query(currentUri, null, null, null, null);
    
    _text.setOnKeyListener(this);
    _list.setAdapter(this);
  }
  
  @Override
  public int getCount() {
    return _cursor.getCount();
  }

  @Override
  public Object getItem(int position) {
    _cursor.moveToPosition(position);
    return new Media(_cursor, cr);
  }

  @Override
  public long getItemId(int position) {
    return position;
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
    // if the existing view is null, create it as a textview
    if ( convertView == null )
      convertView = new TextView(parent.getContext());
    
    TextView mText = (TextView)convertView;
    Media mMedia = (Media)getItem(position);
    mText.setText(mMedia.getTitle());
    
    if ( mMedia.getOwned() > 0 )
      mText.setTextColor(Color.GREEN);
    else
      mText.setTextColor(Color.RED);
        
    return mText;
  }
  
  public boolean update()
  {
    // Time and execute the search query
    long sTime = System.currentTimeMillis();

    _cursor.close(); // Close the old cursor
    Uri currentUri = _searchUri.buildUpon().appendPath( _text.getText().toString() ).build();
    _cursor = cr.query(currentUri, null, null, null, null);
    
    // Probably not needed, but doesn't hurt
    _cursor.moveToFirst();  
    
    long fTime = System.currentTimeMillis();    
    Log.i(TAG, "Search for term '" + _text.getText().toString() + "' returned " + _cursor.getCount() + " results in " + (fTime-sTime) + "ms");

    this.notifyDataSetChanged();
    return true;
  }
 
  @Override
  public boolean onKey(View v, int keyCode, KeyEvent event) {
    update();
    return false;
  }
  
}

Java Source Code List