I am trying to put TextView into FrameLayout into Linear layout.
When I do it using XML it's OK, but using Java code there are problems.
So I can't move text view using layout_gravity in Java code. Also, I don't understand why text matching parent when I use a parameter wrap content. must be
XML code
<LinearLayout
android:id="#+id/chatBox"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:id="#+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
<TextView
android:id="#+id/textView4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView"
android:layout_gravity="right"/>
</FrameLayout>
Java code
FrameLayout fl = new FrameLayout(this);
fl.setLayoutParams(new FrameLayout.LayoutParams(FrameLayout.LayoutParams.MATCH_PARENT,
FrameLayout.LayoutParams.MATCH_PARENT));
TextView tv = new TextView(this);
tv.setText(message);
LinearLayout.LayoutParams p = new
LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
p.gravity = Gravity.LEFT; tv.setLayoutParams(p);
fl.addView(tv);
LinearLayout chatbox = (LinearLayout) findViewById(R.id.chatBox);
chatbox.addView(fl, 0);
you are adding TextView tv to FrameLayout, so you should use FrameLayout.LayoutParams for this TextView
FrameLayout.LayoutParams p = new FrameLayout.LayoutParams(
FrameLayout.LayoutParams.WRAP_CONTENT, FrameLayout.LayoutParams.WRAP_CONTENT);
p.gravity = Gravity.LEFT;
tv.setLayoutParams(p);
fl.addView(tv);
You need to LayoutParams for your Textview not Linearlayout Params. That is causing the problem. You can create it like;
tv.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT))
Related
I am trying to add a textview to listview header and give left margin to it. Here is what i do:
//create a textview, not inflating from layout
TextView selectAdressText = new TextView(getContext());
selectAdressText.setTextSize(12);
selectAdressText.setTextColor(getResources().getColor(R.color.text_black));
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
lp.setMargins(10, 0, 10, 10);
selectAdressText.setLayoutParams(lp);
addressesLV.addHeaderView(selectAdressText);
But it gives nullpointerexception. I also tried AbsListViewLayout params instead of LinearLayoutLayoutParams but it has no setMargins method. So which LayoutParams should i use for this?
Thanks
LinearLayout header = new LinearLayout(this);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
lp.setMargins(10, 0, 10, 10);
TextView t = new TextView(this);
header.addView(t,lp);
addressesLV.addHeaderView(header);
try it.
Margin is overridden by ListView, so you can't use margin directly on the root view of your xml layout. Use padding instead.
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="10dp"
android:paddingBottom="10dp"
android:paddingRight="10dp"
android:paddingLeft="0dp"/>
or wrap a layout (as root node) around it:
<Framelayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_marginBottom="10dp"
android:layout_marginRight="10dp"
android:layout_marginLeft="0dp"/>
</Framelayout>
just create your textView in xml
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:layout_marginBottom="10dp"
android:layout_marginRight="10dp"
android:layout_marginLeft="0dp"/>
View view = inflater.inflate(R.layout.textView, yourListview, false);
yourListview.addHeaderView(view);
I'm dynamically creating horizontal LinearLayout with 5 views added to each one. It is then added to a vertical LinearLayout that is inside a scroll view.
I set the gravity by layout.setGravity( Gravity.CENTER );, but it is not centred but left algined.
THe code that creates the horizontal LinearLayouts
for(int i=0; i<cGlobals.mNames.length; i+=2)
{
LinearLayout layout = new LinearLayout(this);
layout.setOrientation(LinearLayout.HORIZONTAL);
layout.setGravity( Gravity.CENTER );
LinearLayout.LayoutParams llp = new LinearLayout.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
layout.setLayoutParams(llp);
AddButton( layout, cGlobals.mNames[i], i);
TextView t=new TextView(this);
t.setText(" ");
layout.addView(t);
if (i+1<cGlobals.mNames.length)
AddButton( layout, cGlobals.mNames[i+1], i+1);
Container.addView(layout);
}
code that creats the buttons added to the linar layout
void AddButton( LinearLayout layout, String name, int i)
{
favBut[i]=new ImageView(this);
if ( cGlobals.conFav.contains( name ) )
favBut[i].setImageResource(R.drawable.heartselected2);
else
favBut[i].setImageResource(R.drawable.heartunselected2);
favBut[i].setId(defStartFavId+i);
favBut[i].setOnClickListener(this);
layout.addView(favBut[i]);
int w=getWindowManager().getDefaultDisplay().getWidth();
w-=200; // hearts
w=w/2;
Button but1=new Button(this);
but1.setText( name);
but1.setWidth(w);
layout.addView(but1);
but1.setOnClickListener(this);
but1.setId(defStartButId+i);
}
XML file for layout
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:orientation="horizontal" >
<Button
android:id="#+id/butVol"
android:layout_width="140dp"
android:layout_height="wrap_content"
android:textSize="24px"
android:text="Volume"
android:textColor="#ff0000ff"
android:layout_gravity="center"
/>
<Button
android:id="#+id/butRington"
android:layout_width="140dp"
android:layout_height="wrap_content"
android:textSize="24px"
android:text="Rington"
android:textColor="#ff0000ff"
android:layout_gravity="center"
/>
You can try to specify layout parameters like this...
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
layoutParams.gravity = Gravity.CENTER;
layout.addView(favBut[i], layoutParams);
and/or
Container.addView(layout, layoutParams);
and maybe change MATCH_PARENT to WRAP_CONTENT depdning on the results you are after.
http://developer.android.com/reference/android/widget/LinearLayout.LayoutParams.html
Application has scrollview in XML layout.
<ScrollView
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="5dp"
>
</ScrollView>
I want to one textView into this scrollView center.
I tried This code, set horizontal center, but vertical top.. I want both centered.
LinearLayout l1 = new LinearLayout(getActivity());
l1.setOrientation(LinearLayout.VERTICAL);
l1.setGravity(Gravity.CENTER);
l1.setBackgroundColor(Color.WHITE);
TextView errorView = new TextView(getActivity());
LinearLayout.LayoutParams lparams = new LinearLayout.LayoutParams(
new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));
errorView.setText("TextView");
errorView.setTextColor(Color.BLACK);
errorView.setLayoutParams(params);
errorView.setGravity(Gravity.CENTER);
l1.addView(errorView);
scrollViewCon.addView(l1, lparams);
Why is this happening?
Change your xml as shown below -
Add fillViewport as true.
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:layout_marginTop="5dp"
android:fillViewport="true"
>
Removed the relative layout addition part as it is not required.
Can you give me a very simple example of adding child view programmatically to RelativeLayout at a given position?
For example, to reflect the following XML:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="107dp"
android:layout_marginTop="103dp"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceLarge" />
I don't understand how to create an appropriate RelativeLayout.LayoutParams instance.
Heres an example to get you started, fill in the rest as applicable:
TextView tv = new TextView(mContext);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.ALIGN_PARENT_LEFT, RelativeLayout.TRUE);
params.leftMargin = 107
...
mRelativeLayout.addView(tv, params);
The docs for RelativeLayout.LayoutParams and the constructors are here
Firstly, you should give an id to your RelativeLayout let say relativeLayout1.
RelativeLayout mainLayout = (RelativeLayout) findViewById(R.id.relativeLayout1);
TextView mTextView = new TextView(context);
mTextView.setText("Dynamic TextView");
mTextView.setId(111);
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.ALIGN_PARENT_LEFT, RelativeLayout.TRUE);
params.addRule(RelativeLayout.ALIGN_PARENT_TOP, RelativeLayout.TRUE);
mainLayout.addView(mTextView, params);
i want to align an ImageView to the right side of the LinearLayout Programmatically.How can i do this.
You don't. That is not what a linear layout does. Use a RelativeLayout instead.
XML
<RelativeLayout android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello, World!"
android:layout_alignParentRight="true"/>
</RelativeLayout>
Programmatically
public void makeView(Context context) {
RelativeLayout rl = new RelativeLayout(context);
TextView tv = new TextView(context);
tv.setText("Hello, World");
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams
(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
lp.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
rl.addView(tv, lp);
}
You can try this:
ImageView view = (ImageView)findViewById(R.id.imageView);
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams)view.getLayoutParams();
params.gravity = Gravity.LEFT;
But you should use RelativeLayout instead of LinearLayout.