CursorLoaderローダはメールの簡単な記録を読み取る(17)
2637 ワード
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.LoaderManager;
import android.support.v4.app.LoaderManager.LoaderCallbacks;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v4.widget.CursorAdapter;
import android.support.v4.widget.SimpleCursorAdapter;
import android.widget.ListView;
public class MainActivity extends FragmentActivity implements
LoaderCallbacks<Cursor> {
private ListView listview;
private SimpleCursorAdapter adapter;
private String uri_sms = "content://sms";
private LoaderManager loaderManager;
// CursorLoader, SimpleCursorAdapter, AsyncTaskLoader ,
// CursorLoader AsyncTaskLoader AsyncTaskLoader
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listview = (ListView) this.findViewById(R.id.listView_main_titlelist);
adapter = new SimpleCursorAdapter(this, R.layout.item_listview, null,
new String[] { "address", "body" }, new int[] {
R.id.text_item_address, R.id.text_item_body },
CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
listview.setAdapter(adapter);
loaderManager=getSupportLoaderManager();
loaderManager.initLoader(1, null, this);
}
@Override
public Loader<Cursor> onCreateLoader(int id, Bundle bundle) {
// CursorLoader AsyncTaskLoader AsyncTaskLoader
// new
return new CursorLoader(this, Uri.parse(uri_sms), null, null, null,
"date desc");
}
@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
adapter.changeCursor(cursor);
}
@Override
public void onLoaderReset(Loader<Cursor> loader) {
adapter.changeCursor(null);
}
}
//listview
<ListView
android:id="@+id/listView_main_titlelist"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</ListView>
//listview
<TextView
android:id="@+id/text_item_address"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
<TextView
android:id="@+id/text_item_body"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />