Android Open Source - InitHub-Android Subject Activity

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License

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

package com.solutiosoft.android.inithub.ui;
/*from w w  w . j a v a 2s  .  c  om*/
import static com.solutiosoft.android.inithub.Constants.MESSAGE_ACTIVITY;
import android.animation.Animator;
import android.animation.AnimatorListenerAdapter;
import android.annotation.TargetApi;
import android.app.ListActivity;
import android.app.LoaderManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.CursorLoader;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.Loader;
import android.database.Cursor;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;

import com.solutiosoft.android.inithub.Constants;
import com.solutiosoft.android.inithub.R;
import com.solutiosoft.android.inithub.dao.InitHubDatabaseManager;
import com.solutiosoft.android.inithub.provider.SubjectProvider;
import com.solutiosoft.android.inithub.service.SubjectIntentService;

public class SubjectActivity extends ListActivity implements
LoaderManager.LoaderCallbacks<Cursor> {
    private static final String TAG = "SubjectActivity";
    // private Cursor cursor;
    private SimpleCursorAdapter adapter;
    
  private View mSubjectListStatusView;
  private View mSubjectListView;
  
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    
    super.onCreate(savedInstanceState);
    
    IntentFilter logoutIntentFilter = new IntentFilter();
    logoutIntentFilter.addAction(Constants.LOGOUT_INTENT_FILTER);
      registerReceiver(mLogoutReceiver, logoutIntentFilter);      
    
    setContentView(R.layout.subject_list);
    this.getListView().setDividerHeight(2);
    //Toast.makeText(SubjectActivity.this, "Loading...", Toast.LENGTH_LONG).show();
    Intent intent = new Intent(this, SubjectIntentService.class);
      startService(intent);
      
    fillData();
    
  }

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

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    
    switch (item.getItemId()) {
    case R.id.menu_refresh:
      Intent intent = new Intent(this, SubjectIntentService.class);
        startService(intent);
        break;
    case R.id.menu_settings:
      startActivity(new Intent(Constants.SETTING_ACTIVITY));
        break;
    }
    
    return super.onOptionsItemSelected(item);
  }
  // Opens the second activity if an entry is clicked
  @Override
  protected void onListItemClick(ListView l, View v, int position, long id) {
    super.onListItemClick(l, v, position, id);
     getListView().getItemAtPosition(position);
    //Toast.makeText(SubjectActivity.this, ".....id=" + id, Toast.LENGTH_LONG).show();
    Intent i = new Intent(MESSAGE_ACTIVITY);
    Bundle b = new Bundle();
    b.putLong(Constants.SUBJECT_ID, id);
    i.putExtras(b);
    //i.putExtra("subject_id", id);
    //finish();
    startActivity(i);
  }
  /**
   * Shows the progress UI and hides the login form.
   */
  @TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2)
  private void showProgress(final boolean show) {
    // On Honeycomb MR2 we have the ViewPropertyAnimator APIs, which allow
    // for very easy animations. If available, use these APIs to fade-in
    // the progress spinner.
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) {
      int shortAnimTime = getResources().getInteger(
          android.R.integer.config_shortAnimTime);

      mSubjectListStatusView.setVisibility(View.VISIBLE);
      mSubjectListStatusView.animate().setDuration(shortAnimTime)
          .alpha(show ? 1 : 0)
          .setListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
              mSubjectListStatusView.setVisibility(show ? View.VISIBLE
                  : View.GONE);
            }
          });

      mSubjectListView.setVisibility(View.VISIBLE);
      mSubjectListView.animate().setDuration(shortAnimTime)
          .alpha(show ? 0 : 1)
          .setListener(new AnimatorListenerAdapter() {
            @Override
            public void onAnimationEnd(Animator animation) {
              mSubjectListView.setVisibility(show ? View.GONE
                  : View.VISIBLE);
            }
          });
    } else {
      // The ViewPropertyAnimator APIs are not available, so simply show
      // and hide the relevant UI components.
      mSubjectListStatusView.setVisibility(show ? View.VISIBLE : View.GONE);
      mSubjectListView.setVisibility(show ? View.GONE : View.VISIBLE);
    }
  }
  
  @Override
  public Loader<Cursor> onCreateLoader(int arg0, Bundle arg1) {
      String[] projection = { InitHubDatabaseManager.SUBJECT_ID, 
          InitHubDatabaseManager.SUBJECT_SHORT_DESC, 
          InitHubDatabaseManager.SUBJECT_INITIATIVE, 
          InitHubDatabaseManager.SUBJECT_LONG_DESC };
      CursorLoader cursorLoader = new CursorLoader(this,
          SubjectProvider.CONTENT_URI, projection, null, null, null);
      return cursorLoader;
  }

  @Override
  public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
    adapter.swapCursor(data);    
  }

  @Override
  protected void onDestroy() {
    // TODO Auto-generated method stub
    super.onDestroy();
    adapter.getCursor().close();
    unregisterReceiver(mLogoutReceiver);
  }

  @Override
  public void onLoaderReset(Loader<Cursor> loader) {
    adapter.swapCursor(null);
    
  }
  
  private void fillData() {

    // Fields from the database (projection)
    // Must include the _id column for the adapter to work
    String[] from = new String[] { InitHubDatabaseManager.SUBJECT_SHORT_DESC, InitHubDatabaseManager.SUBJECT_INITIATIVE, InitHubDatabaseManager.SUBJECT_LONG_DESC };
    // Fields on the UI to which we map
    int[] to = new int[] { R.id.label, R.id.initiative, R.id.subject_long_desc };

    getLoaderManager().initLoader(0, null, this);
    adapter = new SimpleCursorAdapter(this, R.layout.subject_row, null, from,
      to, 0);

    setListAdapter(adapter);
  }
  
  
  private BroadcastReceiver mLogoutReceiver = new BroadcastReceiver() {
    @Override
    public void onReceive(Context context, Intent intent) {
      Log.d("onReceive","Logout in progress");
        //At this point you should start the login activity and finish this one
      finish();
    }
  };

}
Java Source Code List
