Android - Make a ScrollView with LinearLayout
Solution 1
See http://www.vogella.com/articles/Android/article.html#gridlayout_scrollview
Instead of the TextView you could declare any childs u want.
It's just important that your scrollview does only have ONE chield (i.e. a linearLayout).
Furthermore you should ALWAYS code as much layout in xml as possible!
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:fillViewport="true"
android:orientation="vertical" >
<LinearLayout
android:id="@+id/LinearLayout01"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="@+id/TextView01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="This is a header">
</TextView>
</LinearLayout>
</ScrollView>
Solution 2
I have done mainly two error:
The first is to pass a TableLayout parameter instead of LinearLayout parameter, i mean:
Elem1.setLayoutParams(new TableLayout.LayoutParams(LayoutParams.MATCH_PARENT , 100 ) );
And second to extend a ScrollView seem to be not a good thing. So creating a simple ScrollView object with a LineraLayaout inside is the solution.
Here is the working code:
public class TouchActivity extends Activity
{
public void onCreate(Bundle icicle)
{
super.onCreate(icicle);
ScrollView MainView;
LinearLayout ViewLayout;
ListElement Elem1;
ListElement Elem2;
ListElement Elem3;
ListElement Elem4;
ListElement Elem5;
ListElement Elem6;
MainView = new ScrollView(this);
ViewLayout = new LinearLayout(this);
ViewLayout.setOrientation(LinearLayout.VERTICAL);
ViewLayout.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT , LayoutParams.WRAP_CONTENT) );
Elem1 = new ListElement(this , "CYAN");
Elem1.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT , 100 ) );
Elem2 = new ListElement(this , "BLUE");
Elem2.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT , 100 ) );
Elem3 = new ListElement(this , "CYAN");
Elem3.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT , 100 ) );
Elem4 = new ListElement(this , "BLUE");
Elem4.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT , 100 ) );
Elem5 = new ListElement(this , "CYAN");
Elem5.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT , 100 ) );
Elem6 = new ListElement(this , "BLUE");
Elem6.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT , 100 ) );
ViewLayout.addView(Elem1);
ViewLayout.addView(Elem2);
ViewLayout.addView(Elem3);
ViewLayout.addView(Elem4);
ViewLayout.addView(Elem5);
ViewLayout.addView(Elem6);
ViewLayout.requestLayout();
MainView.addView(ViewLayout);
setContentView(MainView);
}
class ListElement extends View
{
public ListElement(Context context , String TypeName)
{
super(context);
if(TypeName.compareTo("CYAN") == 0) this.setBackgroundColor(Color.CYAN);
if(TypeName.compareTo("BLUE") == 0) this.setBackgroundColor(Color.BLUE);
}
}
}
Bemipefe
Updated on June 05, 2022Comments
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Bemipefe almost 2 years
I want to make a ScrollView with a LinearLayout inside. The linear layout contains 6 View that have the background CYAN, BLUE, CYAN, BLUE etc... This is the code:
public class TouchActivity extends Activity { TouchedView TouchView; public void onCreate(Bundle icicle) { super.onCreate(icicle); TouchView = new TouchedView(this); TouchView.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT , LayoutParams.WRAP_CONTENT) ); //setContentView(TouchView); setContentView(TouchView.ViewLayout); } class TouchedView extends ScrollView { LinearLayout ViewLayout; ListElement Elem1; ListElement Elem2; ListElement Elem3; ListElement Elem4; ListElement Elem5; ListElement Elem6; public TouchedView(Context context) { super(context); ViewLayout = new TableLayout(TouchActivity.this); ViewLayout.setOrientation(LinearLayout.VERTICAL); Elem1 = new ListElement(TouchActivity.this , "CYAN"); Elem1.setLayoutParams(new TableLayout.LayoutParams(LayoutParams.MATCH_PARENT , 100 ) ); Elem2 = new ListElement(TouchActivity.this , "BLUE"); Elem2.setLayoutParams(new TableLayout.LayoutParams(LayoutParams.MATCH_PARENT , 100 ) ); Elem3 = new ListElement(TouchActivity.this , "CYAN"); Elem3.setLayoutParams(new TableLayout.LayoutParams(LayoutParams.MATCH_PARENT , 100 ) ); Elem4 = new ListElement(TouchActivity.this , "BLUE"); Elem4.setLayoutParams(new TableLayout.LayoutParams(LayoutParams.MATCH_PARENT , 100 ) ); Elem5 = new ListElement(TouchActivity.this , "CYAN"); Elem5.setLayoutParams(new TableLayout.LayoutParams(LayoutParams.MATCH_PARENT , 100 ) ); Elem6 = new ListElement(TouchActivity.this , "BLUE"); Elem6.setLayoutParams(new TableLayout.LayoutParams(LayoutParams.MATCH_PARENT , 100 ) ); ViewLayout.addView(Elem1); ViewLayout.addView(Elem2); ViewLayout.addView(Elem3); ViewLayout.addView(Elem4); ViewLayout.addView(Elem5); ViewLayout.addView(Elem6); setFillViewport(false); setContentView(ViewLayout); } } class ListElement extends View { public ListElement(Context context , String TypeName) { super(context); if(TypeName.compareTo("CYAN") == 0) this.setBackgroundColor(Color.CYAN); if(TypeName.compareTo("BLUE") == 0) this.setBackgroundColor(Color.BLUE); } } }
The result is that the 6 view are too big to be contained in the LinearLayout:
http://img513.imageshack.us/img513/5406/androidbadscrollview2.jpg
But if I comment
setContentView(TouchView.ViewLayout);
and I uncomment//setContentView(TouchView);
my activity should be filled with the ScrollView instead of theLinearLayout
but unfortunately I can't see anything.Note that the
ScrollView
contains theLinearLayout
that is set bysetContentView(ViewLayout);
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Bemipefe almost 12 yearsThank you for the help @Thomas K ! This work for sure but i'm doing the gui without the xml file unless i want to declare an activity or add a permission. I would to follow your tip but the xml require to learn another syntax of another language. So why i can do this ? If a manually work is required i prefer to use the well know java and leave the xml to the automatic design tool like DroidDraw and other.