Android Open Source - hts-cycle Download Activity

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License

The source code is released under:

GNU General Public License

Java Source Code

package it.uniroma2.musicsharep2p;
/*from   www  . j av a2 s .  c o m*/


import java.io.IOException;
import java.util.ArrayList;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.ContentValues;
import android.content.DialogInterface;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Color;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;

public class DownloadActivity extends Activity {

  private ListView list;
  private Button start;
  private TextView query;
  private SQLiteDatabase database;
  private DataBaseHelper myDbHelper;
  String toreturn=new String();
  ArrayList<String> listDataHeader;




  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_download);


    //inizializzazion
    list = (ListView) findViewById(R.id.listQuery);
    start = (Button) findViewById(R.id.startQuery);
    query = (TextView) findViewById(R.id.queryText);



    myDbHelper = new DataBaseHelper(this);


    try {myDbHelper.createDataBase();} 
    catch (IOException ioe) 
    {throw new Error("Unable to create database");}

    try {myDbHelper.openDataBase();}
    catch(SQLException sqle){throw sqle;}

    listDataHeader = getQuery();


    ArrayAdapter<String> adapter=new ArrayAdapter<String>( this,android.R.layout.simple_list_item_1, listDataHeader){

      @Override
      public View getView(int position, View convertView,
          ViewGroup parent) {
        View view =super.getView(position, convertView, parent);

        TextView textView=(TextView) view.findViewById(android.R.id.text1);

        textView.setTextColor(Color.WHITE);

        return view;
      }
    };

    list.setAdapter(adapter);

    OnItemClickListener l = new OnItemClickListener(){

      @Override
      public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
          long arg3) {
        // TODO Auto-generated method stub
        final String clicked = (String) arg0.getAdapter().getItem(arg2);

        AlertDialog.Builder alert = new AlertDialog.Builder(DownloadActivity.this);

        alert.setTitle("Remove "+clicked+" from active query?");
        alert.setMessage("Click Ok to remove.");
        alert.setPositiveButton("Ok", new DialogInterface.OnClickListener() {
          public void onClick(DialogInterface dialog, int whichButton) {
            database= myDbHelper.getReadableDatabase();
            database.delete("activequery", "keyword = '"+clicked+"'", null);
            
            
            listDataHeader = getQuery();


            ArrayAdapter<String> adapter=new ArrayAdapter<String>( DownloadActivity.this,android.R.layout.simple_list_item_1, listDataHeader){

              @Override
              public View getView(int position, View convertView,
                  ViewGroup parent) {
                View view =super.getView(position, convertView, parent);

                TextView textView=(TextView) view.findViewById(android.R.id.text1);

                textView.setTextColor(Color.WHITE);

                return view;
              }
            };

            list.setAdapter(adapter);

            
            database.close();  


          }
        });

        alert.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
          public void onClick(DialogInterface dialog, int whichButton) {
            // Canceled.


          }
        });

        alert.show();



      }


    };


    list.setOnItemClickListener(l);

    OnClickListener buttonlistener = new OnClickListener(){

      @Override
      public void onClick(View v) {
        // TODO Auto-generated method stub
        if(v.getId()==R.id.startQuery)
        {

          String newQuery= query.getText().toString();
          database=myDbHelper.getWritableDatabase();
          ContentValues values = new ContentValues();
          values.put("keyword",newQuery );
          database.insert("activequery", null, values);
          listDataHeader = getQuery();


          ArrayAdapter<String> adapter=new ArrayAdapter<String>( DownloadActivity.this,android.R.layout.simple_list_item_1, listDataHeader){

            @Override
            public View getView(int position, View convertView,
                ViewGroup parent) {
              View view =super.getView(position, convertView, parent);

              TextView textView=(TextView) view.findViewById(android.R.id.text1);

              textView.setTextColor(Color.WHITE);

              return view;
            }
          };

          list.setAdapter(adapter);

          query.setText("");

          
          database.close();


        }

      }




    };

    start.setOnClickListener(buttonlistener);    

  }


  public ArrayList<String>  getQuery() {
    ArrayList<String> bfs =  new ArrayList<String>();
    database=myDbHelper.getWritableDatabase();
    Cursor cursor = database.rawQuery(("select * from activequery"), null);
    cursor.moveToFirst();
    while (!cursor.isAfterLast()) {
      String bf = cursorToString(cursor);
      bfs.add(bf);
      cursor.moveToNext();
    }
    cursor.close();
    return bfs;

  }


  public static String cursorToString(Cursor cursor) {
    // TODO Auto-generated method stub
    return cursor.getString(cursor.getColumnIndex("keyword"));
  } 


  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.download, menu);
    menu.clear();
    return true;
  }

}

Java Source Code List

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