Embedded Files
Code for the activity layout file
<TextView
android:id="@+id/tStatus"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="No entries found for January"/>
<LinearLayout
android:id="@+id/lStatus"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/tStatus"
android:layout_marginTop="@dimen/activity_vertical_margin"
android:orientation="horizontal"
android:weightSum="1">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.15"
android:text="Income:"/>
<EditText
android:id="@+id/eIncome"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.35"
android:hint="1500"
android:inputType="number"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.15"
android:text="Expenses:"/>
<EditText
android:id="@+id/eExpenses"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.35"
android:hint="1200"
android:inputType="number"/>
</LinearLayout>
<Button
android:id="@+id/bUpdate"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/lStatus"
android:layout_marginTop="@dimen/activity_vertical_margin"
android:onClick="clicked"
android:text="Update"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:weightSum="1">
<EditText
android:id="@+id/eSearch"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.6"
android:hint="January"/>
<Button
android:id="@+id/bSearch"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.4"
android:onClick="clicked"
android:text="Search"/>
</LinearLayout>
Code for creating a new database listener
private void createNewDBListener() {
// remove previous databaseListener
if (databaseReference != null && currentMonth != null && databaseListener != null)
databaseReference.child("calendar").child(currentMonth).removeEventListener(databaseListener);
databaseListener = new ValueEventListener() {
@Override
public void onDataChange(DataSnapshot dataSnapshot) {
// This method is called once with the initial value and again
// whenever data at this location is updated.
MonthlyExpenses monthlyExpense = dataSnapshot.getValue(MonthlyExpenses.class);
// explicit mapping of month name from entry key
monthlyExpense.month = dataSnapshot.getKey();
eIncome.setText(String.valueOf(monthlyExpense.getIncome()));
eExpenses.setText(String.valueOf(monthlyExpense.getExpenses()));
tStatus.setText("Found entry for " + currentMonth);
}
@Override
public void onCancelled(DatabaseError error) {
}
};
// set new databaseListener
databaseReference.child("calendar").child(currentMonth).addValueEventListener(databaseListener);
}
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