Android OnClick项在填充到列表视图的SQLite DB上不起作用
我已经尝试过让它工作,但它一直将我重定向到我为webview活动创建的错误页面 该应用程序就像一个图书应用程序,我为“添加到Fav”选项卡创建了db,当单击“添加到Fav”时,它会将当前的webview页面“id”和“标题”添加到db中,我正在尝试这样做,以便在单击书签的listview时,它会打开URL “警报”对话框在OnLongItemClick方法中工作正常。 请检查下面的代码Android OnClick项在填充到列表视图的SQLite DB上不起作用,android,sqlite,listview,listview-adapter,Android,Sqlite,Listview,Listview Adapter,我已经尝试过让它工作,但它一直将我重定向到我为webview活动创建的错误页面 该应用程序就像一个图书应用程序,我为“添加到Fav”选项卡创建了db,当单击“添加到Fav”时,它会将当前的webview页面“id”和“标题”添加到db中,我正在尝试这样做,以便在单击书签的listview时,它会打开URL “警报”对话框在OnLongItemClick方法中工作正常。 请检查下面的代码 import java.util.ArrayList; import android.app.Activit
import java.util.ArrayList;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
public class GoToFav extends Activity {
private GymsDbHelper mHelper;
private SQLiteDatabase dataBase;
private ArrayList<String> gymId = new ArrayList<String>();
private ArrayList<String> htitle = new ArrayList<String>();
private ListView gymList;
private AlertDialog.Builder build;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.favpage);
gymList = (ListView) findViewById(R.id.gymList);
mHelper = new GymsDbHelper(this);
gymList.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View arg1,
int position, long arg3) {
String name = htitle.get(position);
if (name.equals("XXXXXX")) {
Intent i = new Intent(GoToFav.this, WebViewActivity.class);
i.putExtra("keyHTML",
"file:///android_asset/gympage1.html");
startActivity(i);
} else {
Intent i = new Intent(getApplicationContext(),
WebViewActivity.class);
i.putExtra("keyHTML",
"file:///android_asset/yerrorpage.html");
startActivity(i);
}
}
});
// long click to delete data
gymList.setOnItemLongClickListener(new OnItemLongClickListener() {
public boolean onItemLongClick(AdapterView<?> arg0, View arg1,
final int arg2, long arg3) {
build = new AlertDialog.Builder(GoToFav.this);
build.setTitle("Delete " + htitle.get(arg2));
build.setMessage("Do you want to delete ?");
build.setPositiveButton("Yes",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
Toast.makeText(getApplicationContext(),
htitle.get(arg2) + " is deleted.",
Toast.LENGTH_LONG).show();
dataBase.delete(
GymsDbHelper.TABLE_NAME,
GymsDbHelper.KEY_ID + "="
+ gymId.get(arg2), null);
displayData();
dialog.cancel();
}
});
build.setNegativeButton("No",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog,
int which) {
dialog.cancel();
}
});
AlertDialog alert = build.create();
alert.show();
return true;
}
});
}
@Override
protected void onResume() {
displayData();
super.onResume();
}
/**
* displays data from SQLite
*/
private void displayData() {
dataBase = mHelper.getWritableDatabase();
Cursor mCursor = dataBase.rawQuery("SELECT * FROM "
+ GymsDbHelper.TABLE_NAME, null);
gymId.clear();
htitle.clear();
if (mCursor.moveToFirst()) {
do {
gymId.add(mCursor.getString(mCursor
.getColumnIndex(GymsDbHelper.KEY_ID)));
htitle.add(mCursor.getString(mCursor
.getColumnIndex(GymsDbHelper.KEY_HTITLE)));
} while (mCursor.moveToNext());
}
FavAdapter favadpt = new FavAdapter(GoToFav.this, gymId, htitle);
gymList.setAdapter(favadpt);
mCursor.close();
}
}
import java.util.ArrayList;
导入android.app.Activity;
导入android.app.AlertDialog;
导入android.content.DialogInterface;
导入android.content.Intent;
导入android.database.Cursor;
导入android.database.sqlite.SQLiteDatabase;
导入android.os.Bundle;
导入android.view.view;
导入android.widget.AdapterView;
导入android.widget.ListView;
导入android.widget.Toast;
导入android.widget.AdapterView.OnItemClickListener;
导入android.widget.AdapterView.OnItemLongClickListener;
公共类GoToFav扩展活动{
私人健身房;
专用数据库;
private ArrayList gymId=new ArrayList();
private ArrayList htitle=new ArrayList();
私有列表视图列表;
私有AlertDialog.Builder构建;
@凌驾
创建时受保护的void(Bundle savedInstanceState){
//TODO自动生成的方法存根
super.onCreate(savedInstanceState);
setContentView(R.layout.favpage);
gymList=(ListView)findViewById(R.id.gymList);
mHelper=新的GymsDbHelper(本);
gymList.setOnItemClickListener(新的OnItemClickListener(){
公共链接(AdapterView arg0、视图arg1、,
整数位置,长arg3){
String name=htitle.get(位置);
如果(名称等于(“XXXXXX”)){
意图i=新意图(GoToFav.this、WebViewActivity.class);
i、 putExtra(“keyHTML”,
"file:///android_asset/gympage1.html");
星触觉(i);
}否则{
意图i=新意图(getApplicationContext(),
WebViewActivity.class);
i、 putExtra(“keyHTML”,
"file:///android_asset/yerrorpage.html");
星触觉(i);
}
}
});
//长时间单击以删除数据
gymList.setOnItemLongClickListener(新的OnItemLongClickListener(){
长单击(AdapterView arg0、视图arg1、,
最终整数(arg2,长arg3){
build=newalertdialog.Builder(GoToFav.this);
build.setTitle(“删除”+htitle.get(arg2));
setMessage(“是否要删除?”);
build.setPositiveButton(“是”,
新建DialogInterface.OnClickListener(){
公共void onClick(对话框接口对话框,
int(其中){
Toast.makeText(getApplicationContext(),
htitle.get(arg2)+“已删除。”,
Toast.LENGTH_LONG).show();
dataBase.delete(
GymsDbHelper.TABLE_名称,
GymsDbHelper.KEY_ID+“=”
+get(arg2),null);
显示数据();
dialog.cancel();
}
});
build.setNegativeButton(“否”,
新建DialogInterface.OnClickListener(){
公共void onClick(对话框接口对话框,
int(其中){
dialog.cancel();
}
});
AlertDialog alert=build.create();
alert.show();
返回true;
}
});
}
@凌驾
受保护的void onResume(){
显示数据();
super.onResume();
}
/**
*显示来自SQLite的数据
*/
私有void displayData(){
dataBase=mHelper.getWritableDatabase();
游标mCursor=dataBase.rawQuery(“选择*FROM”
+GymsDbHelper.TABLE_名称,空);
清晰的;
htitle.clear();
if(mCursor.moveToFirst()){
做{
添加(mCursor.getString)(mCursor
.getColumnIndex(GymsDbHelper.KEY_ID));
htitle.add(mCursor.getString(mCursor
.getColumnIndex(GymsDbHelper.KEY_HTITLE));
}while(mCursor.moveToNext());
}
FavAdapter favadpt=新的FavAdapter(GoToFav.this,gymId,htitle);
体操运动员;赛特适配器(favadpt);
mCursor.close();
}
}
谢谢大家! 似乎
name.equals(“XXXXXX”)
失败了。您可能以某种方式混淆了存储的数据。此外,我还建议您将mCursor.close放在finally子句中。否则,如果出现任何问题,您的光标永远不会关闭,并且您有资源泄漏。嘿。。。谢谢你的最后一点,从那以后我一直在使用它,但我没有取得任何进展,事实上,现在,我只是要删除listview项的onClick方法,而是将页码放在webView标题中,因此“添加到Fav”起作用,但是用户需要返回并自己输入页码才能打开正确的weBview。贫穷,但在这个阶段,这正是我要做的。感谢tho的输入,似乎有很多用户不想帮忙。