Android Open Source - tum-campus Links

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License

The source code is released under:
GNU General Public License
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Java Source Code

?package de.tum.in.tumcampus;
/*  w  w w.ja  v a  2 s. co m*/
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;
import android.widget.SimpleCursorAdapter.ViewBinder;
import android.widget.Toast;
import de.tum.in.tumcampus.models.Link;
import de.tum.in.tumcampus.models.LinkManager;

/**
 * Activity to show Links
 */
public class Links extends Activity implements OnItemClickListener, OnItemLongClickListener, View.OnClickListener,
    ViewBinder {

  SimpleCursorAdapter adapter;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.links);

    // get all links from database
    LinkManager lm = new LinkManager(this);
    Cursor c = lm.getAllFromDb();

    adapter = new SimpleCursorAdapter(this, R.layout.links_listview, c, c.getColumnNames(), new int[] { R.id.icon,
        R.id.name });
    adapter.setViewBinder(this);

    // add footer view to add new links
    View view = getLayoutInflater().inflate(R.layout.links_footer, null, false);

    ListView lv = (ListView) findViewById(R.id.listView);
    lv.addFooterView(view);
    lv.setAdapter(adapter);
    lv.setOnItemClickListener(this);
    lv.setOnItemLongClickListener(this);

    Button save = (Button) view.findViewById(R.id.save);
    save.setOnClickListener(this);

    // reset new items counter
    LinkManager.lastInserted = 0;
  }

  @Override
  public void onItemClick(AdapterView<?> aview, View view, int position, long id) {
    ListView lv = (ListView) findViewById(R.id.listView);
    Cursor c = (Cursor) lv.getAdapter().getItem(position);
    String url = c.getString(c.getColumnIndex("url"));

    // Open Url in Browser
    try {
      Intent viewIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
      startActivity(viewIntent);
    } catch (Exception e) {
      Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
    }
  }

  @Override
  public boolean onItemLongClick(final AdapterView<?> av, View v, final int position, long id) {
    if (id == -1) {
      return false;
    }

    // confirm delete
    DialogInterface.OnClickListener listener = new DialogInterface.OnClickListener() {
      @Override
      public void onClick(DialogInterface dialog, int id) {

        // delete link from list, refresh link list
        Cursor c = (Cursor) av.getAdapter().getItem(position);
        int _id = c.getInt(c.getColumnIndex("_id"));

        LinkManager lm = new LinkManager(av.getContext());
        lm.deleteFromDb(_id);
        adapter.changeCursor(lm.getAllFromDb());
      }
    };
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    builder.setMessage("Wirklch lschen?");
    builder.setPositiveButton("Ja", listener);
    builder.setNegativeButton("Nein", null);
    builder.show();
    return false;
  }

  @Override
  public void onClick(View v) {
    // add a new link
    EditText editName = (EditText) findViewById(R.id.lname);
    EditText editUrl = (EditText) findViewById(R.id.url);

    // prepend http:// if needed
    String url = editUrl.getText().toString();
    if (url.length() > 0 && !url.contains(":")) {
      url = "http://" + url;
    }
    String name = editName.getText().toString();

    LinkManager lm = new LinkManager(this);
    try {
      Link link = new Link(name, url);
      lm.insertUpdateIntoDb(link);
    } catch (Exception e) {
      Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();
    }
    // refresh link list
    adapter.changeCursor(lm.getAllFromDb());

    // clear form
    editName.setText("");
    editUrl.setText("");
  }

  @Override
  public boolean setViewValue(View view, Cursor cursor, int index) {
    // hide empty view elements
    if (cursor.getString(index).length() == 0) {
      view.setVisibility(View.GONE);

      // no binding needed
      return true;
    }
    view.setVisibility(View.VISIBLE);
    return false;
  }
}
Java Source Code List
