每当尝试在ListView上单击某个项目时，我都试图启动一项活动
我在我的项目中使用数据库，在我的项目中使用全局变量
但无法在项目中启动GalleryFileActivity活动
如果您需要了解每个部分，还将提供
感谢您一直以来为追求完美所做的努力
公共类DataListView扩展ListActivity {
final private ArrayList<String> results = new ArrayList<String>();
private String tableName = DBHelper.tableName;
private SQLiteDatabase newDB;
private String Path;
final private ArrayList<String> pikh = new ArrayList<String>();
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final global folder = ((global)getApplicationContext());
openAndQueryDatabase();
displayResultList();
}
private void displayResultList() {
TextView tView = new TextView(this);
tView.setText("data is");
getListView().addHeaderView(tView);
setListAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, results));
ListView lstView = getListView();
lstView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
lstView.setTextFilterEnabled(true);
}
public void onListItemClick(
ListView parent, View v, int position,long id, global folder)
{
String pos=results.get(position-1);
super.onListItemClick(parent, v, position, id);
Toast.makeText(this,
"You have selected " + results.get(position-1) ,
Toast.LENGTH_SHORT).show();
folder.setsubfolder (pos);
**startActivity(new Intent(this,GalleryFileActivity.class));**
}
public void onClick(View view) {
ListView lstView = getListView();
}
private void openAndQueryDatabase() {
try {
DBHelper dbHelper = new DBHelper(this.getApplicationContext());
newDB = dbHelper.getWritableDatabase();
Cursor c = newDB.rawQuery("SELECT Path, Header FROM resource1 "
, null);
if (c != null ) {
if (c.moveToFirst()) {
do {
Path = c.getString(c.getColumnIndex("Path"));
String Header = c.getString(c.getColumnIndex("Header"));
results.add( Path + " " + Header);
}while (c.moveToNext()) ;
}
}
} catch (SQLiteException se ) {
Log.e(getClass().getSimpleName(), "Could not create or Open the database");
} finally {
if (newDB != null)
newDB.execSQL("DELETE FROM " + tableName);
newDB.close();
}
}
}
最佳答案
该代码看起来正确。
听起来您的清单中可能没有声明GalleryFileActivity。
检查您的logcat输出-那里可能有一个例外提到了这一点。