Creating LinearLayout Programmatically/Dynamically with Multiple Views

Question

I have a hierarchy that is like this:

• LinearLayout(horizontal)
  • ImageView
  • LinearLayout(vertical)
    • TextView
    • TextView

Answer 1

In the XML File LinearLayout already has child view. So there is not need to add them in code.

Answer 2

The problem is because the views are already added to the layout in the XML file. Then you findViewById (find them) and try to add them to the layout again. That is why the app crashes complaining that, view already has a parent and you can't add it again.

Answer 3

i suggest you to remove the xml file and just use full code on the java side. you can add the views programatically from the java side. this one from xtreemdeveloper but i change few line for the parent layout.

// remove this params set it up below
parent.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));

// change the code above into 
.LayoutParams layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.MATCH_PARENT);
        addContentView(parent,layoutParams);
// end of my change

it will look like this in full code =

   LinearLayout parent = new LinearLayout(context);

    // remove this params set it up below
    parent.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));

    // change the code above into 
    .LayoutParams layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT,LinearLayout.LayoutParams.MATCH_PARENT);
            addContentView(parent,layoutParams);
    // end of my change

    parent.setOrientation(LinearLayout.HORIZONTAL);

    //children of parent linearlayout

    ImageView iv = new ImageView(context);

    LinearLayout layout2 = new LinearLayout(context);

    layout2.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
    layout2.setOrientation(LinearLayout.VERTICAL);

    parent.addView(iv);
    parent.addView(layout2);

    //children of layout2 LinearLayout

    TextView tv1 = new TextView(context);
    TextView tv2 = new TextView(context);
    TextView tv3 = new TextView(context);
    TextView tv4 = new TextView(context);

    layout2.addView(tv1);
    layout2.addView(tv2);
    layout2.addView(tv3);
    layout2.addView(tv4);

Answer 4

You want that hierarchy programmatically.

- LinearLayout(horizontal) - ImageView - LinearLayout(vertical) - TextView - TextView - TextView - TextView

Ok lets start with Parent LinearLayout

LinearLayout parent = new LinearLayout(context);

parent.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
parent.setOrientation(LinearLayout.HORIZONTAL);

//children of parent linearlayout

ImageView iv = new ImageView(context);

LinearLayout layout2 = new LinearLayout(context);

layout2.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));
layout2.setOrientation(LinearLayout.VERTICAL);

parent.addView(iv);
parent.addView(layout2);

//children of layout2 LinearLayout

TextView tv1 = new TextView(context);
TextView tv2 = new TextView(context);
TextView tv3 = new TextView(context);
TextView tv4 = new TextView(context);

layout2.addView(tv1);
layout2.addView(tv2);
layout2.addView(tv3);
layout2.addView(tv4);

And you are done :)