我正在为WIMMOne手表编写应用程序:没有方向更改,小巧的简单屏幕和Android版本7.
我的第一个Android APP正在运行,但根据一本书,它有一个片段。但是碎片增加了我不想处理的复杂情况。
我的第二个应用程序具有类似的结构:项目列表然后选择要查看或更新详细信息的项目。所以我试图只是读取一个游标,然后创建一个数组,然后调用“setListAdapter(lstAdapter);”。
我开始时:
getLoaderManager().initLoader(0, null, this);
出现此错误:
LoaderManager类型中的方法initLoader(int,Bundle,LoaderManager.LoaderCallbacks) 不适用于参数(int,null,PhoneListActivity)
所以我尝试了他们的建议:
getLoaderManager().initLoader(0, null, (android.app.LoaderManager.LoaderCallbacks<D>) this);
出现此错误:
该方法的initLoader(int,Bundle,LoaderManager.LoaderCallbacks)方法 LoaderManager引用缺少的类型D
所以我尝试了这个:
getLoaderManager().initLoader(0, null, (android.app.LoaderManager.LoaderCallbacks) this);
并收到此错误:
类型安全:未经检查的调用initLoader(int,null,LoaderManager.LoaderCallbacks) LoaderManager类型的泛型方法initLoader(int,Bundle,LoaderManager.LoaderCallbacks)
有几个帖子称其用于11以下的版本
getSupportLoaderManager().initLoader(0, null, this);
但这给了我这个错误:
对于PhoneListActivity类型
,未定义getSupportLoaderManager()方法
我还看到不要在活动中使用“getLoaderManager:”。
那么我做错了什么?
非常感谢, 克拉克
以下是我目前的情况:
package com.wimmone.phonenos;
import android.view.Menu;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.ListActivity;
import android.content.ContentUris;
import android.content.ContentValues;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnDismissListener;
import android.database.Cursor;
import android.net.Uri;
import android.app.Application;
import android.content.Intent;
import android.database.Cursor;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
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.SimpleCursorAdapter;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.Toast;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import android.os.Environment;
import com.wimm.framework.app.Dialog;
public class PhoneListActivity extends ListActivity
implements
LoaderCallbacks<Cursor>
{
private SimpleCursorAdapter mAdapter;
List strRecId = new ArrayList();
private ListAdapter lstAdapter;
String strPhoneGroup = "";
String strPhoneName = "";
String strPhoneHome = "";
String strPhoneCell = "";
String strPhoneWork = "";
private Button btn_Add;
List strRecord = new ArrayList(3);
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.phone_list_activity);
String[] strItems = new String[] {PhoneProvider.COLUMN_PHONE_NAME};
int[] iCnt = new int[] { R.id.text1 };
mAdapter = new SimpleCursorAdapter(this, R.layout.phone_row,
null, strItems, iCnt, 0);
Log.d("PHONENOS***", "X onCrt: x02 START");
setListAdapter(mAdapter);
//getLoaderManager().initLoader(0, null, this);
//getLoaderManager().initLoader(0, null, this);
getSupportLoaderManager().initLoader(0, null, this);
//-----------------------------------------------
// define add button
Button btnAdd = (Button) findViewById(R.id.btn_Add);
btnAdd.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
Log.d("PHONENOS***", "S create view btnAddEvent:");
}
} );
//-----------------------------------------------
// define Exit button
Button btnExit = (Button) findViewById(R.id.btn_Exit);
btnExit.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
Log.d("PHONENOS***", "S create view btnEXIT:");
//Toast.makeText(this, "Good bye",
//Toast.LENGTH_SHORT).show();
// Application.onTerminate();
finish();
}
} );
//-----------------------------------------------
// define EXPORT button
Button btnExport . . .
}
//===============================================================
// DATA BASE ROUTINES TO LOAD FROM CURSOR
@Override
public Loader<Cursor> onCreateLoader(int ignored, final Bundle args)
{
Log.d("EventLst","S LoadCSR");
return new CursorLoader(this, PhoneProvider.CONTENT_URI, null,
null, null, null);
// Log.d("PHONENOS***","X LoadCSR");
}
@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor cursor)
{
// Log.d("PHONENOS***","0 LoadFin");
int iRecNo = 0;
int RowNO = 0;
int iBuCnt = 0;
String strPath = "";
mAdapter.swapCursor(cursor);
strRecId.clear();
strRecord.clear();
strRecord.add(0, "mm-dd-yy: Event name");
cursor.moveToFirst();
Log.d("EventLst","1 LoadFin DO");
// Read from cursor and add to list
while (cursor.isAfterLast() == false)
{
iRecNo = iRecNo + 1;
// - Table has 4 columns, read them into string array: strC
String strC[] = { (cursor.getString(0)), (cursor.getString(1)),
(cursor.getString(2)), (cursor.getString(3)),
(cursor.getString(4)), (cursor.getString(5))
};
String strRowNo = (cursor.getString(0));
strPhoneGroup = (cursor.getString(1));
strPhoneName = (cursor.getString(2));
strPhoneHome = (cursor.getString(3));
strPhoneCell = (cursor.getString(4));
strPhoneWork = (cursor.getString(5));
Log.d("PHONENOS***","4 LoadCSR:" + "I:" + iRecNo + "=" + strRowNo + "N:" + strPhoneName);
// - Concatenate Group and name into one string, add to table
strRecord.add(iRecNo, strPhoneGroup + "/" + strPhoneName);
// - save record number for each event in strRecId
// - Records are sorted by date, so we need to save RowId to pass
// to edit screen
strRecId.add((cursor.getString(0)));
iBuCnt = iBuCnt + 1;
cursor.moveToNext();
} // --------------------end of while loop
//cursor.close();
lstAdapter = new ArrayAdapter<String>(this,
R.layout.phone_row, R.id.text1, strRecord);
// * Call to SetListAdapter()informs ListFragment how to fill ListView
// * here use ArrayAdapter
setListAdapter(lstAdapter);
// Log.d("EventLst","8 LoadCSR:" + "ALLDONE");
}
@Override
public void onLoaderReset(Loader<Cursor> loader)
// This is called when the last Cursor provided to onLoadFinished() above
// is about to be closed
{
// Log.d("EventLst","x LoadRst");
// INITRUN REMOVE BELOW
mAdapter.swapCursor(null);
}
}
答案 0 :(得分:0)
由于没有人回答,我重新完成了我的计划并使其正常运行。我真的需要使用“extends LauncherActivity”(用于WIMMOne)。由于我正在处理智能手表上的小型数据库 ,因此无论如何都不需要加载器,所以我只是放弃了加载器的使用并直接使用了光标。它实际上似乎更快。
答案 1 :(得分:0)
您可以让您的活动延长FragmentActivity
并使用
getSupportLoaderManager().initLoader(0, null, this);
希望这能帮到你!