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[英]how to get data into webView activity when recyclerView Item is clicked
[英]get the data when an Item is clicked in recyclerview
單擊RecyclerView
的項目后如何訪問數據。 我需要的是如何從數據庫中獲取展開的項目背后的邏輯。 當前用於使用CursorRecyclerViewAdapter
從數據庫https://gist.github.com/skyfishjy/443b7448f59be978bc59獲取數據的適配器
RemindersAdapter.java
public class RemindersAdapter extends CursorRecyclerViewAdapter<RemindersAdapter.ItemViewHolder> {
private final LayoutInflater inflater;
List<ListInfo> data = Collections.emptyList();
private Context context;
ListInfo temporaryBucket;
public RemindersAdapter(Context context, Cursor cursor){
super(context, cursor);
inflater = LayoutInflater.from(context);
this.context = context;
}
@Override
public ItemViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = inflater.inflate(R.layout.reminder_item, parent, false);
ItemViewHolder holder = new ItemViewHolder(view);
temporaryBucket = new ListInfo();
return holder;
}
@Override
public void onBindViewHolder(ItemViewHolder viewHolder, Cursor cursor) {
int id = cursor.getInt(cursor.getColumnIndex(MyDBHandler.COLUMN_ID));
String title = cursor.getString(cursor.getColumnIndex(MyDBHandler.COLUMN_TITLE_REMINDER));
String desc = cursor.getString(cursor.getColumnIndex(MyDBHandler.COLUMN_DESC_REMINDER));
String date = cursor.getString(cursor.getColumnIndex(MyDBHandler.COLUMN_DATE_REMINDER));
viewHolder.title.setText(title);
}
class ItemViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
TextView title;
public ItemViewHolder(View itemView) {
super(itemView);
title = (TextView) itemView.findViewById(R.id.reminderTitle);
itemView.setOnClickListener(this);
}
@Override
public void onClick(View v) {
int position = getLayoutPosition();
Toast.makeText(context, "Clicked", Toast.LENGTH_SHORT).show();
}
}
}
MyDBHandler.java
public class MyDBHandler extends SQLiteOpenHelper{
private static final int DATABASE_VERSION = 7;
private static final String DATABASE_NAME = "paroah.db";
public static final String TABLE_REMINDER = "reminders";
public static final String COLUMN_ID = "_id";
public static final String COLUMN_TITLE_REMINDER = "title";
public static final String COLUMN_DESC_REMINDER = "desc";
public static final String COLUMN_DATE_REMINDER = "date_created";
private Cursor allReminders;
public MyDBHandler(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
String query = " CREATE TABLE "
+TABLE_REMINDER+ "(" +
COLUMN_ID +" INTEGER PRIMARY KEY AUTOINCREMENT,"+
COLUMN_TITLE_REMINDER + " TEXT ,"+
COLUMN_DESC_REMINDER + " TEXT ,"+
COLUMN_DATE_REMINDER + " TEXT "+
");";
db.execSQL(query);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
Log.d("aoi", "Upgrading database from version " + oldVersion + " to "
+ newVersion + ", which will destroy all old data");
try {
db.execSQL("DROP TABLE IF EXISTS "+TABLE_REMINDER);
onCreate(db);
} catch (SQLException e) {
Log.d("aoi", "getting exception "
+ e.getLocalizedMessage().toString());
}
}
public void addReminder(ListInfo reminder ){
ContentValues values = new ContentValues();
values.put(COLUMN_TITLE_REMINDER, reminder.getTitle());
values.put(COLUMN_DESC_REMINDER, reminder.getDesc());
values.put(COLUMN_DATE_REMINDER, reminder.getDate());
SQLiteDatabase db = getWritableDatabase();
db.insert(TABLE_REMINDER, null, values);
db.close();
}
public Cursor getAllReminders() {
SQLiteDatabase db = getWritableDatabase();
String query = "SELECT * FROM "+TABLE_REMINDER;
allReminders = db.rawQuery(query, null);
return allReminders;
}
}
在我的onBindViewHolder
我得到“ id,title,desc和date”,但僅顯示標題,單擊該標題將顯示desc和日期。 對於測試,只需單擊項目即可立即顯示Toast。
您可以使用holder.itemView.setOnClickListener(new OnClickListener({...})
在onBindViewHolder()
設置holder.itemView.setOnClickListener(new OnClickListener({...})
,然后可以訪問所需的所有數據。
您可以將視圖持有者與所有數據綁定,即使您僅顯示標題
@Override
public void onBindViewHolder(ItemViewHolder viewHolder, Cursor cursor) {
int id = cursor.getInt(cursor.getColumnIndex(MyDBHandler.COLUMN_ID));
String title = cursor.getString(cursor.getColumnIndex(MyDBHandler.COLUMN_TITLE_REMINDER));
String desc = cursor.getString(cursor.getColumnIndex(MyDBHandler.COLUMN_DESC_REMINDER));
String date = cursor.getString(cursor.getColumnIndex(MyDBHandler.COLUMN_DATE_REMINDER));
viewHolder.bind(id, title, desc, date);
}
class ItemViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
int idData;
String titleData;
String descData;
String dateData;
TextView title;
public ItemViewHolder(View itemView) {
super(itemView);
title = (TextView) itemView.findViewById(R.id.reminderTitle);
itemView.setOnClickListener(this);
}
public void bind(int id, String title, String desc, String date){
this.idData = id;
this.titleData = title;
this.descData = desc;
this.dateData = date;
this.title.setText(title);
}
@Override
public void onClick(View v) {
// You can access all the data here
Toast.makeText(context, "Clicked", Toast.LENGTH_SHORT).show();
}
}
}
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