Блог

Я пытаюсь перенести свои данные listview в AttendenceActivity в другой listview с базой данных, чтобы сохранить мои данные для дальнейшего использования.

Прошу прощения за плохое кодирование. Все еще новичок в этом. Кроме того, у меня сжатые сроки для моего проекта, любая помощь была бы очень признательна, ребята.

 import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Toast;

public class AttendenceActivity extends AppCompatActivity {

ListView simpleList;
String[] QL1501S;
Button submit;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_attendence);
    // get the string array from string.xml file

    QL1501S = getResources().getStringArray(R.array.QL1501S);
    // get the reference of ListView and Button
    simpleList = (ListView) findViewById(R.id.simpleListView);
    submit = (Button) findViewById(R.id.submit);
    // set the adapter to fill the data in the ListView
    CustomAdapter customAdapter = new CustomAdapter(getApplicationContext(), QL1501S);

    simpleList.setAdapter(customAdapter);
    // perform setOnClickListerner event on Button
    submit.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            String message = "";
                                  // get the value of selected answers from custom adapter
            for (int i = 0; i < CustomAdapter.selectedAnswers.size(); i  ) {
                message = message   "n"   (i   1)   " "   CustomAdapter.selectedAnswers.get(i);
            }
            // display the message on screen with the help of Toast.
            Toast.makeText(getApplicationContext(), message, Toast.LENGTH_LONG).show();
        }
    });
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        return true;
    }

    return super.onOptionsItemSelected(item);
}
  

Вот XML-файл для AttendenceActivity………….

     <RelativeLayout         xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Attendence"
    android:id="@ id/textView7"
    android:layout_gravity="center_horizontal"
    android:textSize="50dp" />

<ListView
    android:id="@ id/simpleListView"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_above="@ id/submit"
    android:divider="@color/material_blue_grey_800"
    android:dividerHeight="1dp"
    android:footerDividersEnabled="false"
    android:layout_below="@ id/textView7" />

<Button
    android:id="@ id/submit"
    android:layout_width="200dp"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_centerHorizontal="true"
    android:layout_margin="20dp"
    android:background="#0f0"
    android:text="Submit"
    android:textColor="#fff"
    android:textSize="20sp" />
</RelativeLayout>
  

Вот кодировка CustomAdapter для AttendenceActivity

 public class CustomAdapter extends BaseAdapter {
Context context;
String[] QL1501S;               
LayoutInflater inflter;
public static ArrayList<String> selectedAnswers;

public CustomAdapter(Context applicationContext, String[] questionsList) {
    this.context = context;
    this.QL1501S = questionsList;

    // initialize arraylist and add static string for all the questions
    selectedAnswers = new ArrayList<>();
    for (int i = 0; i < questionsList.length; i  ) {
    selectedAnswers.add("Not Marked");
    }
    inflter = (LayoutInflater.from(applicationContext));
    }

@Override
public int getCount() {return QL1501S.length;}



@Override
public Object getItem(int i) {
    return null;
    }

@Override
public long getItemId(int i) {
    return 0;
    }

@Override
public View getView(final int i, View view, ViewGroup viewGroup) {
    view = inflter.inflate(R.layout.list_items, null);
    // get the reference of TextView and Button's
    TextView NameOfStud = (TextView) view.findViewById(R.id.NameOfStud);
    RadioButton Present = (RadioButton) view.findViewById(R.id.Present);
    RadioButton Absent = (RadioButton) view.findViewById(R.id.Absent);
    // perform setOnCheckedChangeListener event on yes button
    Present.setOnCheckedChangeListener(new    CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
    // set Yes values in ArrayList if RadioButton is checked
    if (isChecked)
    selectedAnswers.set(i, "Present");
    }
    });
    // perform setOnCheckedChangeListener event on no button
    Absent.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
    // set No values in ArrayList if RadioButton is checked
    if (isChecked)
    selectedAnswers.set(i, "Absent");

    }
    });
    // set the value in TextView
    NameOfStud.setText(QL1501S[i]);
    return view;
    }

    }
  

Наконец, listview для посещаемости Listview

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<!-- TextView for studentname-->
<TextView
    android:id="@ id/NameOfStud"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:padding="@dimen/activity_horizontal_margin"
    android:textColor="#000" />
<!-- RadioGroup for grouping of RadioButton-->
<RadioGroup
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginTop="10dp"
    android:orientation="horizontal"
    android:weightSum="2">

    <RadioButton
        android:id="@ id/Present"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginLeft="15dp"
        android:layout_weight="1"
        android:text="Present"
        android:textColor="#000"
        android:checked="false" />

    <RadioButton
        android:id="@ id/Absent"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginLeft="15dp"
        android:layout_weight="1"
        android:text="Absent"
        android:textColor="#000"
        android:checked="false" />
</RadioGroup>

<EditText
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@ id/Remarks"
    android:hint="Remarks" />