实际上我可以循环并登录控制台的所有行：
db.getAllPoids();
List<Poids> poids = db.getAllPoids();
for (Poids val : poids) {
String log = "Id: " + val.getId() + " ,Date: " + val.getDate_enr() + " ,Poids: " + val.getPoids() + " ,Evolution: " + val.getEvolution() ;
// Writing Contacts to log
Log.d("Name: ", log);
}
数据库处理器：
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.setId(Integer.parseInt(cursor.getString(0)));
poid.setPoids(Integer.parseInt(cursor.getString(1)));
poid.setDate_enr(cursor.getString(2));
poid.setEvolution(cursor.getString(3));
poid.setId_utilisateurs(Integer.parseInt(cursor.getString(4)));
// Adding contact to list
poidsList.add(poid);
} while (cursor.moveToNext());
}
但是现在我不想做一个更好的观点，我需要像桌子或听众一样的东西，我知道他们是google上的listview例子，但不是我使用的这种方法。
在我看来，我需要有3行： 获取第一个中的日期，第二个和第n个图像视图中的行“poids”包含用于删除单击行的ID。有可能的 ？我不知道该怎么做。
PoidsAdapter：
public class PoidsAdapter extends ArrayAdapter<Poids> {
private Context mContext;
private List<Poids> mListPoids;
public PoidsAdapter(Context context, int resource, List<Poids> objects) {
super(context, resource, objects);
this.mContext = context;
this.mListPoids = objects;
}
@Override
public int getCount() {
return mListPoids.size();
}
@Override
public Poids 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;
}
}
更新2：
我隐藏了一个文本视图来保存id：
@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.poidsId = (TextView) view.findViewById(R.id.textViewPoidsId);
holder.mImageUrl = (Button) view.findViewById(R.id.buttonSupprimer);
Poids poids = mListPoids.get(position);
holder.mTvTitle.setText(poids.getDate_enr().toString());
holder.mTvMediaName.setText(String.valueOf(poids.getPoids()).toString() + "kg");
holder.poidsId.setText(String.valueOf(poids.getId()).toString());
return view;
}
片段：
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);
final ListView listView=(ListView) view.findViewById(R.id.listView);
Button buttonAjouter = (Button)view.findViewById(R.id.buttonAjouter);
Button buttonSupprimer = (Button)view.findViewById(R.id.buttonSupprimer);
db = new DatabaseHandler(getActivity());
db.getAllPoids();
final List<Poids> poids = db.getAllPoids();
PoidsAdapter mAdapter = new PoidsAdapter(getActivity(), R.layout.listpoids, poids);
listView.setAdapter(mAdapter);
Log.d("getCount(): ", "" + mAdapter.getCount());
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(final AdapterView<?> parent, View view, final int position, long id) {
poids.remove(position);
db.deletePoids(position);
}
});
buttonSupprimer.setOnClickListener(
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
poids.remove(position);
db.deletePoids(position);
}
})});
buttonAjouter.setOnClickListener(
new View.OnClickListener() {
@Override
public void onClick(View v) {
Fragment fragment = null;
fragment = new AjoutPoidsFragment();
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction().replace(R.id.frame_container, fragment).commit();
}
});
return view;
}
}
数据库：
public void deletePoids(int rowID) {
SQLiteDatabase db = this.getWritableDatabase();
db.delete(TABLE_POIDS, KEY_ID + " =? ", new String[]{String.valueOf(rowID)});
}
monpoids_activity：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="fill_parent"
android:focusable="true"
android:focusableInTouchMode="true"
android:descendantFocusability="beforeDescendants"
android:background="#ffffff"
android:orientation="vertical">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentRight="true"
android:padding="10dp">
<Button
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Ajouter un poids"
android:id="@+id/buttonAjouter"
android:background="#70cbed"
android:textColor="#ffffff"
android:textAlignment="center"
android:layout_marginTop="20dp" />
<ListView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/listView" />
</LinearLayout>
</RelativeLayout>
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"
android:background="#bbd3dc">
<TextView
android:id="@+id/textViewDate"
android:layout_gravity="center"
android:layout_width="0.7in"
android:layout_height="wrap_content"
android:text="TextView"
android:padding="10dp" />
<TextView
android:layout_gravity="center"
android:layout_width="0.7in"
android:layout_height="wrap_content"
android:text="New Text"
android:id="@+id/textViewPoids"
android:padding="10dp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textViewPoidsId"
android:text="hidden"
android:visibility="gone"/>
<Button
android:layout_gravity="center"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Supprimer"
android:id="@+id/buttonSupprimer" />
</LinearLayout>
答案 0 :(得分：0)
将方法添加到 DatabaseHandler
public static void delete(int rowID) {
SQLiteDatabase database = this.getWritableDatabase();
database.delete(TABLE_POIDS, COL_ID + " =? ", new String[]{String.valueOf(rowID)});
}
@Override
public void onItemClick(final AdapterView<?> parent, View view, final int position, long id) {
Poids poids= mAdapter.getItem(position);
int id = poids.getId();
poids.remove(position);
db.delete(id);
mAdapter.notifyDataSetChanged();
}
创建PoidsAdapter.class
public class PoidsAdapter extends ArrayAdapter<Poids> {
private Context mContext;
private List<Poids> mListPoids;
public PoidsAdapter(Context context, int resource, List<Poids> objects) {
super(context, resource, objects);
this.mContext = context;
this.mListPoids = objects;
}
@Override
public int getCount() {
return mListPoids.size();
}
@Override
public Poids getItem(int position) {
return mListPoids.get(position);
}
@Override
public View getView(final int position, View view, final ViewGroup parent) {
final ViewHolder holder;
if (view == null) {
LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.item_poids, null);
holder = new ViewHolder();
holder.mTvTitle = (TextView) view.findViewById(R.id.text_title);
holder.mTvMediaName = (TextView) view.findViewById(R.id.text_mediaName);
holder.mImageUrl = (ImageView) view.findViewById(R.id.image_url);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
final Poids poids = mListPoids.get(position);
holder.mTvTitle.setText(poids.getTitle());
holder.mTvMediaName.setText(poids.getMediaName());
Picasso.with(mContext).load(poids.getImageUrl())
//.fit().centerInside()
.into(holder.mImageUrl);
return view;
}
public class ViewHolder {
public ImageView mImageUrl;
public TextView mTvTitle;
public TextView mTvMediaName;
}
}
List<Poids> poids= db.getAllPoids();
PoidsAdapter mAdapter = new PoidsAdapter(this, R.layout.item_poids, poids);
listView.setAdapter(mAdapter);
将picasso添加到build.gradle
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:22.2.1'
compile 'com.squareup.picasso:picasso:2.5.2'
}
在activity_main.xml中添加控件ListView
创建布局item_poids.xml有3个控件TextView，TextView，ImageView
答案 1 :(得分：0)
是的，这是可能的。
一种方法是使用ListView。
这需要将ListView定义为布局的一部分，例如： -
<ListView
android:id="@+id/mylistview"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
</ListView>
然后，您需要在列表视图中为行/条目布局（即它等同于光标行）。一个简单的例子，适用于两个db列（名称和顺序）： -
<?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="@dimen/standard_listview_row_height"
android:paddingBottom="@dimen/standard_listview_row_padding_vertical"
android:paddingLeft="@dimen/standard_listview_row_padding_horizontal"
android:paddingRight="@dimen/standard_listview_row_padding_horizontal"
android:paddingTop="@dimen/standard_listview_row_padding_vertical">
<!-- Aisle Name -->
<TextView
android:id="@+id/aisle_name_entry"
android:layout_width="@dimen/standard_dummy_size"
android:layout_height="match_parent"
android:layout_weight="0.89"
android:textSize="@dimen/standard_listview_text_size"
android:textStyle="bold" />
<!-- Aisle Order-->
<TextView
android:id="@+id/aisle_order_entry"
android:layout_width="@dimen/standard_dummy_size"
android:layout_height="match_parent"
android:layout_weight="0.1"
android:gravity="end"
android:textSize="@dimen/standard_listview_text_size"
android:visibility="visible"/>
</LinearLayout>
您需要一个Adapter.A游标适配器基本上将数据库游标中的数据放入适当的视图中。这是上面的适配器： -
class AislesCursorAdapter extends CursorAdapter {
public AislesCursorAdapter(Context context, Cursor cursor, int flags) {
super(context, cursor, 0);
}
@Override
public View getView(int position, View convertview, ViewGroup parent) {
View view = super.getView(position, convertview, parent);
Context context = view.getContext();
if (position % 2 == 0) {
view.setBackgroundColor(ContextCompat.getColor(context, R.color.colorlistviewroweven));
} else {
view.setBackgroundColor(ContextCompat.getColor(context, R.color.colorlistviewrowodd));
}
return view;
}
@Override
public void bindView(View view, Context context, Cursor cursor) {
TextView textviewaislename = (TextView) view.findViewById(R.id.aisle_name_entry);
TextView textviewaisleorder = (TextView) view.findViewById(R.id.aisle_order_entry);
textviewaislename.setText(cursor.getString(ShopperDBHelper.AISLES_COLUMN_NAME_INDEX));
textviewaisleorder.setText(cursor.getString(ShopperDBHelper.AISLES_COLUMN_ORDER_INDEX));
}
@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
return LayoutInflater.from(context).inflate(R.layout.activity_aisle_list_entry, parent, false);
}
}
请注意！ getView 方法不是必需的。在这里，它用于交替背景颜色。另外 ShopperDBHelper。?????? _ ORDER 等于数据库游标中相应列的偏移量。膨胀的布局（ R.layout.activity_aisle_list_entry ）是第二个布局（如上所述）。
通过创建数据库游标，使用数据库游标创建适配器实例，然后将ListView设置为使用该适配器，可以在相应的活动中将它们绑定在一起。 ： -
Cursor aislescsr = shopperdb.getAislesPerShopAsCursor(csr.getInt(ShopperDBHelper.SHOPS_COLUMNN_ID_INDEX));
ListView lv = (ListView) findViewById(R.id.aislelist_listview);
AislesCursorAdapter aisleadapter = new AislesCursorAdapter(lv.getContext(), aislescsr, CursorAdapter.FLAG_REGISTER_CONTENT_OBSERVER);
lv.setAdapter(aisleadapter);
对于可点击的图像，您可以将其添加到条目布局中，并将onClick属性设置为活动中方法的名称（不是唯一的wau，但可能是最简单的）。例如（这是针对TextView而不是图像）： -
<TextView
android:id="@+id/shoppinglist_deletebutton"
android:layout_width="@dimen/standard_dummy_size"
android:layout_height="@dimen/shoppinglist_listview_button_height"
android:layout_weight="0.05"
android:singleLine="true"
android:text="@string/standarddeletetext"
android:gravity="center"
android:textSize="@dimen/standard_subsubsubheading_text_size"
android:textStyle="bold"
android:background="@color/colorRequiredLabel"
android:textColor="@color/colorNormalButtonText"
android:onClick="sledelete"/>
以下是相应的 sledelete 方法： -
public void sledelete(View view) {
Integer tag = (Integer)view.getTag();
shoppinglistcsr.moveToPosition(tag);
shopperdb.setShopListEntryAsComplete(shoppinglistcsr.getLong(0));
shoppinglistcsr = shopperdb.getShoppingList();
currentsla.swapCursor(shoppinglistcsr);
}
请注意！该方法只传递视图，重要的是不是位置。因此getTag（标签设置在adpter中的位置，示例如下）。请注意，最后2行刷新Listview，即从DB获取新光标，然后交换到新光标（您还可以使用changeCursor和onNotifyDataSetChanged）。
这是适配器中的标签设置代码。这是在 bindView 方法中（并设置3个TextViews的标签）： -
public void bindView(View view,Context context, Cursor cursor) {
int pos = cursor.getPosition();
.........
donebtntv.setTag(pos);
deletebtntv.setTag(pos);
replacebtntv.setTag(pos);
或者你可以在getView方法中设置这个标签，该方法有一个位置传递给它（所以你不需要int pos = cursor.getPosition）