I want to create a ScrollView
which has a dynamic content with two columns in itself.
And items of right column are connected to items of left column cross-positioned. (Like this first column item y-coordinates:[(0,100),(100,200),(200,300)] -- second column item y-coordinates:[(50,150),(150,250)])
Using one ScrollView
or a ListView
is impossible because they cannot have two columns like that cross positioned as I know. So, I have two solutions. These solution approaches have different problems.
Here is my first solution:
-A dynamic custom view inside a ScrollView.
-The problem with this approach is I cannot figure out how to update the ScrollView
and Dynamic Custom View, so it does not scroll.
My second solution:
-Two seperate connected listview (If you slide one, other one slides automatically to the same position synchronously).
-This solutions problem is I cant find out a way to connect them to each other.
Any help will be appreciated.
For any person who might need the answer, I've found the solution in here. I improved this with that (which is incorrect)(actually I fixed it). And here is my final solution:
MyScrollView.java
public class MyScrollView extends ScrollView implements IScrollListener {
private static final String TAG = "MyScrollView";
private IScrollListener listener;
public MyScrollView(Context context) {
super(context);
}
public MyScrollView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public MyScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
public void setScrollViewListener(IScrollListener listener) {
this.listener = listener;
}
@Override
protected void onScrollChanged(int x, int y, int oldX, int oldY) {
super.onScrollChanged(x, y, oldX, oldY);
if (listener != null) {
listener.onScrollChanged(this, x, y, oldX, oldY);
} else {
Log.i(TAG, "asdasd");
}
}
@Override
public void onScrollChanged(IScrollListener scrollView, int x, int y, int oldX, int oldY) {
super.onScrollChanged(x, y, oldX, oldY);
if (listener != null) {
listener.onScrollChanged(this, x, y, oldX, oldY);
} else {
Log.i(TAG, "asdasd");
}
}
}
MyActivity.java
public class MyActivity extends AppCompatActivity implements IScrollListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_multi_position);
.
.
.
scrollViewLeft = (MyScrollView) this.findViewById(R.id.scrollViewLeft);
scrollViewRight = (MyScrollView) this.findViewById(R.id.scrollViewRight);
.
.
scrollViewLeft.setScrollViewListener(this);
scrollViewRight.setScrollViewListener(this);
.
.
LayoutInflater vi = (LayoutInflater) getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View viewLeft = vi.inflate(R.layout.target_item, null);
View viewRight = vi.inflate(R.layout.target_item_right, null);
// insert into left view
ViewGroup insertPointLeft = (ViewGroup) findViewById(R.id.leftLinearLayout);
insertPointLeft.addView(viewLeft, 0, new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
// insert into right view
ViewGroup insertPointRight = (ViewGroup) findViewById(R.id.rightLinearLayout);
insertPointRight.addView(viewRight, targets.size(), new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
// fill in any details dynamically here
TextView number = (TextView) viewLeft.findViewById(R.id.number);
number.setText("1");
TextView name = (TextView) viewLeft.findViewById(R.id.name);
name.setText("Muhammed Aydogan");
// fill in any details dynamically here
TextView number2 = (TextView) viewRight.findViewById(R.id.number);
number2.setText("2");
TextView name2 = (TextView) viewRight.findViewById(R.id.name);
name2.setText("Muhammed Aydogan");*/
}
@Override
public void onScrollChanged(IScrollListener scrollView, int x, int y, int oldX, int oldY) {
if (scrollViewLeft.equals(scrollView)) {
scrollViewRight.scrollTo(x, y);
} else if (scrollViewRight.equals(scrollView)) {
scrollViewLeft.scrollTo(x, y);
}
}
}
IScrollListener.java
public interface IScrollListener {
void onScrollChanged(IScrollListener scrollView, int x, int y, int oldX, int oldY);
}