I have a linear layout, how can I add gravity to it so that it is horizontally centred?
LinearLayout textHolder = new LinearLayout(context);
textHolder.setGravity(Gravity.CENTER_VERTICAL | Gravity.CENTER_HORIZONTAL);
The above does not appeat to work.
This should work
LinearLayout textHolder = new LinearLayout(context);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT,
LayoutParams.FILL_PARENT);
lp.gravity = Graviity.CENTER_HORIZONTAL;
textHolder.setLayoutParams(lp);
But this will only center the children of the linearlayout according to textHolder's size. If you want to center the textHolder completely, the you should apply the layout params to the parent of textHolder.
Related
I want to play gif in alertdialog.
I write this code:
AlertDialog.Builder builder = new AlertDialog.Builder(myThis);
builder.setCancelable(false);
WebView view = new WebView(myThis);
view.loadUrl("file:///android_asset/gif_pokemon.gif");
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.MATCH_PARENT);
params.gravity=Gravity.CENTER;
view.setLayoutParams(params);
builder.setView(view);
dlg_p=builder.create();
WindowManager.LayoutParams wlmp = dlg_p.getWindow().getAttributes();
wlmp.gravity = Gravity.CENTER ;
dlg_p.show();
but the problem is gif is not places in center. Its gravity is left.
How can I set it to center?
Wrap the WebView using LinearLayout,
the LayoutParams of the LinearLayout is set to match_parent for the width and wrap_content for the height, if needed fully center then use match_parent for the height too.
set the LinearLayout gravity to center, you can also use centerVertical or centerHorizontal.
Hope it helps :)
AlertDialog.Builder builder = new AlertDialog.Builder(myThis);
builder.setCancelable(false);
LinearLayout linearLayout = new LinearLayout(myThis);
linearLayout.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
linearLayout.setGravity(Gravity.CENTER);
WebView view = new WebView(myThis);
view.loadUrl("file:///android_asset/gif_pokemon.gif");
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
params.gravity=Gravity.CENTER;
view.setLayoutParams(params);
linearLayout.addView(view);
builder.setView(linearLayout);
dlg_p=builder.create();
dlg_p.show();
My app's layout is FrameLayout. I want to align an ImageButton to right top of the framelayout. I tried below code not worked.
mImageButton = new ImageButton(mContext);
LayoutParams ll = new LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT );
ll.gravity = Gravity.RIGHT;
mImageButton.setLayoutParams(ll);
mImageButton.setImageDrawable(getResources().getDrawable(R.drawable.ic_menu_moreoverflow_normal_holo_light));
this.addView(mImageButton);
expected output
I think you should change the construction code of LayoutParams to:
LayoutParams ll = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
ll.gravity = Gravity.TOP | Gravity.RIGHT;
In your code, you set the layout_width and layout_height value to MATCH_PARENT , so your ImageView will fill all your parent FrameLayout.
Try this,
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
params.gravity = Gravity.TOP | Gravity.RIGHT;
mImageButton.setLayoutParams(params);
I think you need to provide height width in layout params. Because with match_parent it will take width and height of parent or you can use WRAP_CONTENT.
mImageButton = new ImageButton(mContext);
LayoutParams ll = new LayoutParams(width,height);
ll.gravity = Gravity.RIGHT | Gravity.TOP;
mImageButton.setLayoutParams(ll);
mImageButton.setImageDrawable(getResources().getDrawable(R.drawable.ic_menu_moreoverflow_normal_holo_light));
this.addView(mImageButton);
I have a RelativeLayout with ImageView and TextView. I want to the TextView right below the ImageView(with a small padding) and both the ImageView and TextView, aligned to center in the RelativeLayout.
The RelativeLayout is added Programatically
I have read some questions on SO regarding the alignment, but, I can't get them to work for me. Below is my current code...
Code for RelativeLayout
RelativeLayout relativeLayout = new RelativeLayout(this);
Code for ImageView
ImageView image = new ImageView(this);
RelativeLayout.LayoutParams lpImage = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT);
lpImage.addRule(RelativeLayout.CENTER_IN_PARENT);
//Setting the parameters on the Image
image.setLayoutParams(lpImage);
//adding imageview to relative layout
relativeLayout.addView(image);
Code for TextView
TextView textview = new TextView(this);
RelativeLayout.LayoutParams lpTextView = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT);
lpTextView.addRule(RelativeLayout.BELOW, image.getId());
//Setting the parameters on the TextView
textview.setLayoutParams(lpTextView);
//Adding TextView to relative layout
relativeLayout.addView(textview);
If I set RelativeLayout.CENTER_IN_PARENT for both image and text, they overlap eachother, which is understandable as RelativeLayout supports overlapping of views.
I thought setting RelativeLayout.BELOW for textview will make it align itself below the image, but it's not the case. I even tried RelativeLayout.ALIGN_BOTTOMfor textview, but even that didn't work.
Try this..
RelativeLayout relativeLayout = new RelativeLayout(this);
RelativeLayout.LayoutParams lprela = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.MATCH_PARENT,
RelativeLayout.LayoutParams.MATCH_PARENT);
relativeLayout.setLayoutParams(lprela);
ImageView image = new ImageView(this);
RelativeLayout.LayoutParams lpImage = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT);
lpImage.addRule(RelativeLayout.ALIGN_PARENT_TOP);
//Setting the parameters on the Image
image.setLayoutParams(lpImage);
//adding imageview to relative layout
relativeLayout.addView(image);
TextView textview = new TextView(this);
RelativeLayout.LayoutParams lpTextView = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT);
lpTextView.addRule(RelativeLayout.BELOW, image.getId());
//Setting the parameters on the TextView
textview.setLayoutParams(lpTextView);
//Adding TextView to relative layout
relativeLayout.addView(textview);
Or
LinearLayout linearLayout = new LinearLayout(this);
LinearLayout.LayoutParams lp_ineer_ver = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.MATCH_PARENT);
linearLayout.setGravity(Gravity.CENTER);
linearLayout.setOrientation(LinearLayout.VERTICAL);
linearLayout.setLayoutParams(lp_ineer_ver);
ImageView image = new ImageView(this);
LinearLayout.LayoutParams lpImage = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
//Setting the parameters on the Image
image.setLayoutParams(lpImage);
//adding imageview to relative layout
linearLayout.addView(image);
TextView textview = new TextView(this);
LinearLayout.LayoutParams lpTextView = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
//Setting the parameters on the TextView
textview.setLayoutParams(lpTextView);
//Adding TextView to relative layout
linearLayout.addView(textview);
Below process may also work for you.
1) Add Image view & Text view in vertical LinearLayout.
2) Add the linear layout to Center of Relative layout.(using CENTER_IN_PARENT).
I'm having trouble calculating the weight inside of an scroll view on my android app. I want the app's content to resize proportionally to the screen size. How can I calculate the weight inside a scroll view?
Here some of my code:
LinearLayout layout_principal = (LinearLayout) findViewById(R.id.layout_items);// is horizontal layout and layout of Scrollview
LinearLayout layout_titulo_opcion = new LinearLayout(this);
LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.FILL_PARENT,
0,
1f);
layout_titulo_opcion.setLayoutParams(layoutParams);
LinearLayout layout_titulo_opcion2 = new LinearLayout(this);
LinearLayout.LayoutParams layoutParams2 = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.FILL_PARENT,
0,
1f);
layout_titulo_opcion2.setLayoutParams(layoutParams2);
layout_principal.addView(layout_titulo_opcion);
layout_principal.addView(layout_titulo_opcion2);
To get/set the weight, use this:
LinearLayout.LayoutParams mylp = (LinearLayout.LayoutParams)myLayout.getLayoutParams();
int myWeight = mylp.weight; // get weight
mylp.weight = 4; // set weight
To set the weight sum, use this:
myLayout.setWeightSum(10);
I dynamically declared some horizontal layouts witch contains some elements like ImageButtons, Buttons, and TextViews, these elements centrally oriented, all of the elements are oriented perfectly but the TextViews. I tried both declaring them directly like the rest of the elements and declaring them each inside a vertical layout but both didn't work:
that's my code:
// the layout params for the Horizontal Layout
LinearLayout.LayoutParams lp_icon = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
0, 1);
lp_icon.setMargins(10, 15, 5, 0);
// the layout params for the elements that contained in the horizontal LinearLayout
LinearLayout.LayoutParams lp_ineer_ver = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.MATCH_PARENT, Gravity.CENTER);
// the layout params for the TextViews
LinearLayout.LayoutParams tests = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT, Gravity.CENTER);
// the layout params for the vertical layouts that contaion TextViews
LinearLayout.LayoutParams temp_lay = new LinearLayout.LayoutParams(
0,
LinearLayout.LayoutParams.WRAP_CONTENT, Gravity.CENTER);
temp_lay.weight = 1;
// the elements declaration
icon1.setLayoutParams(lp_icon);// icon1 is then horizontal LinearLayout
icon1.setBackgroundResource(R.drawable.ac_overlay);
icon1.setOrientation(LinearLayout.HORIZONTAL);
icon1.setTag(NORMAL);
// TextView contained in a vertical Layout
LinearLayout lay = new LinearLayout(this);
icon1.addView(lay);
lay.setLayoutParams(temp_lay);
lay.setBackgroundColor(Color.TRANSPARENT);
lay.setOrientation(LinearLayout.VERTICAL);
TextView text1 = new TextView(this);
lay.addView(text1);
text1.setLayoutParams(tests);
text1.setText("Master Bedroom");
text1.setTextSize(12);
text1.setTextColor(Color.WHITE);
// other elements
ImageButton image = new ImageButton(this);
icon1.addView(image);
image.setLayoutParams(lp_ineer_ver);
image.setImageResource(R.drawable.grpbuttonfocus6);
image.setBackgroundColor(Color.TRANSPARENT);
Button testbut = new Button(this);
icon1.addView(testbut);
testbut.setLayoutParams(lp_ineer_ver);
testbut.setText(" 8");
testbut.setTextSize(12);
testbut.setBackgroundColor(Color.TRANSPARENT);
testbut.setTextColor(Color.WHITE);
ImageButton testcol = new ImageButton(this);
icon1.addView(testcol);
testcol.setLayoutParams(lp_ineer_ver);
testcol.setImageResource(R.drawable.home_cool);
testcol.setBackgroundColor(Color.TRANSPARENT);
// the TextView that's declared directly in the Horizontal Layout
TextView text2 = new TextView(this);
icon1.addView(text2);
text2.setLayoutParams(lp_ineer_ver);
text2.setText("00");
text2.setTextSize(12);
Try this..
Juse two changes in your code like below for first textview icon1.addView(text1); and the last textview text2.setLayoutParams(tests);
First
TextView text1 = new TextView(this);
icon1.addView(text1); //correction here
text1.setLayoutParams(tests);
text1.setText("Master Bedroom");
text1.setTextSize(12);
and Second
TextView text2 = new TextView(this);
icon1.addView(text2);
text2.setLayoutParams(tests); //correction here
text2.setText("00");
text2.setTextSize(12);
textView.setGravity(Gravity.CENTER_VERTICAL | Gravity.CENTER_HORIZONTAL);
and you can have Try adding the following code for applying the layout params to the TextView
LayoutParams lp = new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.WRAP_CONTENT,
LinearLayout.LayoutParams.WRAP_CONTENT);
lp.addRule(LinearLayout.CENTER_IN_PARENT);
textView.setLayoutParams(lp);
in XML file :
android:gravity = "center"