-5
我已經創建了兩個XML文件，以及3排我的自定義視圖populatemy的ListView，2個首創的文字，最後一個按鈕來刪除數據：無法從sqlite的
活動的XML：
<ListView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/listView" />
listpoids.xml：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<TextView
android:id="@+id/textViewDate"
android:layout_gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
<TextView
android:layout_gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Text"
android:id="@+id/textViewPoids" />
<Button
android:layout_gravity="center"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Supprimer"
android:id="@+id/buttonSupprimer" />
</LinearLayout>
我做了我adaper：
public class PoidsAdapter extends ArrayAdapter<String> {
private Context mContext;
private List<String> mListPoids;
public PoidsAdapter(Context context, int resource, List<String> objects) {
super(context, resource, objects);
this.mContext = context;
this.mListPoids = objects;
}
@Override
public int getCount() {
return mListPoids.size();
}
@Override
public String getItem(int position) {
return mListPoids.get(position);
}
@Override
public View getView(final int position, View view, final ViewGroup parent) {
final holder holder;
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.listpoids, null);
holder = new holder();
holder.mTvTitle = (TextView) view.findViewById(R.id.textViewDate);
holder.mTvMediaName = (TextView) view.findViewById(R.id.textViewPoids);
holder.mImageUrl = (Button) view.findViewById(R.id.buttonSupprimer);
return view;
}
public class holder {
public Button mImageUrl;
public TextView mTvTitle;
public TextView mTvMediaName;
}
}
和數據庫處理程序來獲取所有的行：
public List<Poids> getAllPoids() {
SQLiteDatabase db = this.getReadableDatabase();
ArrayList<Poids> poidsList = new ArrayList<Poids>();
Cursor cursor = db.rawQuery("SELECT * from " + TABLE_POIDS,
new String[] {});
/*
List<Poids> poidsList = new ArrayList<Poids>();
// Select All Query
String selectQuery = "SELECT * FROM " + TABLE_POIDS;
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
*/
// looping through all rows and adding to list
if (cursor.moveToFirst()) {
do {
Poids poid = new Poids();
poid.setPoids(Integer.parseInt(cursor.getString(1)));
poid.setDate_enr(cursor.getString(2));
// Adding contact to list
poidsList.add(poid);
} while (cursor.moveToNext());
}
// return contact list
return poidsList;
}
要完成我怎麼稱呼它：
db.getAllPoids();
List<Poids> poids = db.getAllPoids();
ListView listView=(ListView) view.findViewById(R.id.listView);
newData = new ArrayList<String>();
for (Poids val : poids) {
newData.add(val.getDate_enr());
newData.add(String.valueOf(val.getPoids()));
//String log = "Id: " + val.getId() + " ,Date: " + val.getDate_enr() + " ,Poids: " + val.getPoids() + " ,Evolution: " + val.getEvolution() ;
// Writing Contacts to log
//Log.d("Name: ", log);
}
PoidsAdapter mAdapter = new PoidsAdapter(getActivity(), R.layout.listpoids, newData);
listView.setAdapter(mAdapter);
但它不工作，我在一個片段。
UPDATE：
@Override
public View getView(final int position, View view, final ViewGroup parent) {
final ViewHolder holder;
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.listpoids, null);
holder = new ViewHolder();
holder.mTvTitle = (TextView) view.findViewById(R.id.textViewDate);
holder.mTvMediaName = (TextView) view.findViewById(R.id.textViewPoids);
holder.mImageUrl = (Button) view.findViewById(R.id.buttonSupprimer);
final Poids poids = mListPoids.get(position);
holder.mTvTitle.setText(poids.getDate_enr().toString());
holder.mTvMediaName.setText(String.valueOf(poids.getPoids()).toString());
return view;
}
我覺得這裏的錯誤是beceuse我看到了兩行，但在setAdapter或類似這樣的東西，這裏失去了一些東西，我認爲：
public class MonPoidsFragment extends Fragment {
DatabaseHandler db = new DatabaseHandler(getActivity());
public MonPoidsFragment(){}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//View rootView = inflater.inflate(R.layout.accueil_activity, container, false);
View view = inflater.inflate(R.layout.monpoids_activity, container, false);
db = new DatabaseHandler(getActivity());
db.getAllPoids();
List<Poids> poids = db.getAllPoids();
ListView listView=(ListView) view.findViewById(R.id.listView);
PoidsAdapter mAdapter = new PoidsAdapter(getActivity(), R.layout.listpoids, poids);
listView.setAdapter(mAdapter);
return view;
}
public Cursor getDetails() {
return db.getReadableDatabase().query("Poids ", null, null, null, null, null, null);
//This will return all data in your table.
}
}
數據庫助手：
// Getting All Contacts
public List<Poids> getAllPoids() {
List<Poids> poidsList = new ArrayList<Poids>();
// Select All Query
String selectQuery = "SELECT * FROM " + TABLE_POIDS;
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
// looping through all rows and adding to list
if (cursor.moveToFirst()) {
do {
Poids poid = new Poids();
poid.setPoids(Integer.parseInt(cursor.getString(1)));
poid.setDate_enr(cursor.getString(2));
//poid.setPoids(Integer.parseInt(cursor.getString(0)));
//poid.setDate_enr(cursor.getString(1));
// Adding contact to list
poidsList.add(poid);
} while (cursor.moveToNext());
}
// return contact list
return poidsList;
}
你能描述更多什麼不起作用嗎？沒有顯示結果？要麼 ... ？ –
@ccsnoopy我有listpoids.xml顯示，所以2 textview與「TextView」作爲值和按鈕，就像如果lstview只顯示xml文件 – BJM
listview的孩子將填充您的適配器，爲什麼你有2 textview和按鈕作爲listview的孩子？ – drulabs