Question

I’m having trouble going from finding each view based on its actual id like this-

TextView updateText = (TextView)findViewById(R.id.courtText1);

to finding each view based on the current value of “i” in my loop, like this-

for(int i=1; i<3; i++){
    TextView updateText = (TextView)findViewById(R.id.courtText"i");
}

Here is the layout XML-

<TableLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:padding="2dp" >

            <TableRow
                android:id="@+id/tableRow1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="2dp"
                android:background="@drawable/row_background"
                android:clipToPadding="true"
                android:padding="5dp" android:onClick="goToDetail">

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="vertical" >

                    <TextView
                        android:id="@+id/courtText1"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="Moscone Rec Center"
                        android:textColor="#D8D8D8"
                        android:textSize="20dp" />

                    <TextView
                        android:id="@+id/updateText1"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:textColor="#D8D8D8"
                        android:textSize="15dp" />

                    <TextView
                        android:id="@+id/timeText1"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:textColor="#D8D8D8"
                        android:textSize="15dp" />

                </LinearLayout>

                <ImageButton
                    android:id="@+id/imageButton2"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:src="@android:drawable/ic_dialog_map" android:onClick="goToMap"/>

                <ImageButton
                    android:id="@+id/imageButton3"
                    android:layout_width="50dp"
                    android:layout_height="50dp"
                    android:src="@android:drawable/ic_menu_share" android:onClick="shareUpdate"/>

            </TableRow>

            <TableRow
                android:id="@+id/tableRow1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="2dp"
                android:background="@drawable/row_background"
                android:clipToPadding="true"
                android:padding="5dp" >

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="vertical" >

                    <TextView
                        android:id="@+id/courtText2"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="Joe Dimaggio"
                        android:textColor="#D8D8D8"
                        android:textSize="20dp" />

                    <TextView
                        android:id="@+id/updateText2"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:textColor="#D8D8D8"
                        android:textSize="15dp" />

                    <TextView
                        android:id="@+id/timeText2"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:textColor="#D8D8D8"
                        android:textSize="15dp" />
                </LinearLayout>
                <ImageButton
                    android:id="@+id/imageButton2"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:src="@android:drawable/ic_dialog_map" />

                <ImageButton
                    android:id="@+id/imageButton3"
                    android:layout_width="50dp"
                    android:layout_height="50dp"
                    android:src="@android:drawable/ic_menu_share" />
            </TableRow>

            <TableRow
                android:id="@+id/tableRow1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="2dp"
                android:background="@drawable/row_background"
                android:padding="5dp" >

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="vertical" >

                    <TextView
                        android:id="@+id/courtText3"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="Brentwood Rec Center"
                        android:textColor="#D8D8D8"
                        android:textSize="20dp" />

                    <TextView
                        android:id="@+id/updateText3"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:textColor="#D8D8D8"
                        android:textSize="15dp" />

                    <TextView
                        android:id="@+id/timeText3"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:textColor="#D8D8D8"
                        android:textSize="15dp" />
                </LinearLayout>
                <ImageButton
                    android:id="@+id/imageButton2"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:src="@android:drawable/ic_dialog_map" />

                <ImageButton
                    android:id="@+id/imageButton3"
                    android:layout_width="50dp"
                    android:layout_height="50dp"
                    android:src="@android:drawable/ic_menu_share" />
            </TableRow>

            <TableRow
                android:id="@+id/tableRow1"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_margin="2dp"
                android:background="@drawable/row_background"
                android:padding="5dp" >

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:orientation="vertical" >

                    <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="Can't find your court?"
                        android:textColor="#D8D8D8"
                        android:textSize="20dp" />
                     <TextView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="Let us know"
                        android:textColor="#D8D8D8"
                        android:textSize="15dp" />

                     <ImageButton
                         android:id="@+id/imageButton4"
                         android:layout_width="wrap_content"
                         android:layout_height="wrap_content"
                         android:src="@android:drawable/ic_dialog_email" android:onClick="createSupportEmail"/>

                </LinearLayout>
            </TableRow>
        </TableLayout>

Any thoughts on how to find the value of each item with a loop?

Answer 1

Give your container (LinearLayout) an id, and iterate over its children.

LinearLayout container = (LinearLayout) findViewById(R.id.whatever);
TextView updateText;

for (int i = 0; i < container.getChildCount(); i++) {
    updateText = (TextView) container.getChildAt(i);
    // Do something to `updateText`
}

Update: That’s the general idiom for this type of thing. I just looked more closely at your code, and if I understand what you’re trying to do in this case, you want to iterate over the table rows and do something to the specific TextArea of each row. If so, then instead of courtText1, courtText2, etc., you should get rid of the number. Have one courtText, one upateText, and one timeText per row. Then do something like this:

TableLayout table = (TableLayout) findViewById(R.id.give_it_an_id);
TextView courtText;

// For each row
for (int i = 0; i < table.getChildCount(); i++) {
    // Get the one `courtText` in this row
    courtText = table.getChildAt(i).findViewById(R.id.courtText);
    if (courtText != null) {
        // Do something to `courtText`
    }
}