activity_main.xml <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <ScrollView android:id="@+id/scroll_view" android:layout_width="match_parent" android:layout_height="match_parent"> <LinearLayout android:id="@+id/linearlayout1" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <TextView android:id="@+id/tv_name1" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="30dp" android:layout_marginTop="15dp" android:layout_marginRight="30dp" android:padding="15dp" android:text="Name:" android:textSize="15sp" /> <EditText android:id="@+id/et_name1" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginLeft="30dp" android:layout_marginRight="30dp" android:hint="Enter Your Name" android:padding="15dp" android:textSize="15sp" /> </LinearLayout> </LinearLayout> </ScrollView> </RelativeLayout>
2 回答
蕭十郎
TA貢獻(xiàn)1815條經(jīng)驗(yàn) 獲得超13個(gè)贊
您需要在列表項(xiàng)的布局中添加兩個(gè)按鈕，例如更新和刪除。所以列表持有者類看起來(lái)像：
class ViewHolder {
TextView tv_name;
TextView tv_email;
TextView tv_contact;
TextView tv_dob;
TextView tv_qualification;
TextView tv_time;
Button btn_update; //Update for item
Button btn_delete; //Delete an item.
}
完成此操作后，請(qǐng)?jiān)谶m配器的 getView() 方法中執(zhí)行以下操作。仔細(xì)觀察注釋，進(jìn)一步理解實(shí)現(xiàn)邏輯。
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = LayoutInflater.from(mContext).inflate(R.layout.second_layout, parent, false);
holder.tv_name = (TextView) convertView.findViewById(R.id.tv_name1);
holder.tv_contact = (TextView) convertView.findViewById(R.id.tv_phoneno);
holder.tv_email=(TextView)convertView.findViewById(R.id.tv_email);
holder.tv_dob=(TextView)convertView.findViewById(R.id.tv_dob);
holder.tv_qualification=(TextView)convertView.findViewById(R.id.tv_qualification);
holder.tv_time=(TextView)convertView.findViewById(R.id.tv_time);
//bind holder.btn_update and holder.btn_delete here
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.tv_name.setText(mPersonList.get(position).getName());
holder.tv_contact.setText(mPersonList.get(position).getContactno());
holder.tv_email.setText(mPersonList.get(position).getEmail());
holder.tv_dob.setText(mPersonList.get(position).getDatepicker());
holder.tv_qualification.setText(mPersonList.get(position).getQualification());
holder.tv_time.setText(mPersonList.get(position).getTimepicker());
holder.btn_update.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//Call your dialog to update and pass "mPersonList.get(position)" model so that data in the model will be updated.
//Once update is done call refreshList() from the confirmation dialog button.
}
});
holder.btn_delete.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mPersonList.remove(position);
refreshList();
}
});
return convertView;
}
private void refreshList() {
notifyDataSetChanged();
}
一個(gè)建議，盡量避免像學(xué)生那樣使用 button1、button2、editText1、textView1 等變量。取而代之的是，為變量使用適當(dāng)且有意義的名稱。
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