CursorLoaderローダは携帯電話の連絡先の簡単な記録を読み取る(17)
5420 ワード
package com.example.andday17cursorloader_contacts;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Intent;
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.view.Menu;
import android.view.MenuItem;
import android.widget.ListView;
import android.widget.SearchView;
import android.widget.SearchView.OnQueryTextListener;
public class MainActivity extends FragmentActivity implements
LoaderCallbacks<Cursor> {
// //
// private String uri_contacts = "content://com.android.contacts/contacts";
// private String uri_raw_contacts =
// "content://com.android.contacts/raw_contacts";
// private String uri_data = "content://com.android.contacts/data";
// private String uri_data_phone =
// "content://com.android.contacts/data/phones";
// private String uri_data_email =
// "content://com.android.contacts/data/emails";
private ListView listview;
private LoaderManager loaderManager;
private SimpleCursorAdapter adapter;
private String uri_raw_contacts = "content://com.android.contacts/raw_contacts";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listview = (ListView) this.findViewById(R.id.listview);
loaderManager = getSupportLoaderManager();
loaderManager.initLoader(1, null, this);
adapter = new SimpleCursorAdapter(this, R.layout.item_listview, null,
new String[] { "_id", "display_name" }, new int[] {
R.id.text_id, R.id.text_displayname },
CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
listview.setAdapter(adapter);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.main, menu);
// ( ), menu ,(menu )
// view findViewById() , id, SearchVeiw
MenuItem item = menu.findItem(R.id.action_searchview);// SearchVeiw item
SearchView searchview = (SearchView) item.getActionView();
// SearchView 11,
searchview.setOnQueryTextListener(new OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}
@Override
public boolean onQueryTextChange(String keywords) {
// , onCreateLoader()
Bundle bundle = new Bundle();
bundle.putString("keywords", keywords);
loaderManager.restartLoader(1, bundle, MainActivity.this);//
return false;
}
});
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_contacts://
Intent intent = new Intent();
intent.setAction("com.android.contacts.action.LIST_CONTACTS");
startActivity(intent);
break;
case R.id.action_restore://
// deleted=0, 0 ContentProvider raw_contacts
ContentResolver resolver = getContentResolver();
ContentValues values = new ContentValues();
// ContentValues
values.put("deleted", "0");
int count = resolver.update(Uri.parse(uri_raw_contacts), values,
"deleted=1", null);
// 0
if (count > 0) {
loaderManager.restartLoader(1, null, MainActivity.this);
}
break;
}
return super.onOptionsItemSelected(item);
}
@Override
public Loader<Cursor> onCreateLoader(int id, Bundle bundle) {
// :new CursorLoader() , , CursorLoader
if (bundle == null) {// , ,id displayname
return new CursorLoader(this, Uri.parse(uri_raw_contacts),
new String[] { "_id", "display_name" }, "deleted=0", null,
null);
} else {// keywords SearchView
// : keywords , , , if
String keywords = bundle.getString("keywords");
return new CursorLoader(this, Uri.parse(uri_raw_contacts),
new String[] { "_id", "display_name" }, "display_name like ?",
new String[] { keywords + "%" }, null);
}
}
@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
adapter.changeCursor(cursor);
}
@Override
public void onLoaderReset(Loader<Cursor> loader) {
adapter.changeCursor(null);
}
}
//
<ListView
android:id="@+id/listview"
android:layout_width="match_parent"
android:layout_height="match_parent" />
//listview
<TextView
android:id="@+id/text_id"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
<TextView
android:id="@+id/text_displayname"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />