I created a field of buttons in my XML file:
<RelativeLayout...>
<Button
android:id="#+id/button_1"
...
/>
<Button
android:id="#+id/button_2"
android:layout_toRightOf="#+id/button_1"
...
/>
...
</RelativeLayout>enter code here
Now I want to abolish the XML rule "toRightOf" programmaticaly.
I know how to set rules:
RelativeLayout.LayoutParams params = null;
params = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
params.addRule(RelativeLayout.RIGHT_OF, topIcon.getId());
button_2.setLayoutParams(params);
But I want to DELETE rules I had set in XML file.
How can this be done?
The background of my question: I used an XML file to easily
create field of buttons.
But later I want to drag and drop buttons.
For that I have to delete rules like "toRightOf".
Otherwise instead of one button a lot of buttons
move if I only want to move one button.
Looking at this question, it cannot be removed but instead you set the value to 0:
layoutParams.addRule(RelativeLayout.RIGHT_OF, 0);
Related
It is not a duplicate question.
I have a xml layout which have alot of things and I'm including 2 layouts which have visibility gone.
<include layout="#layout/some_layout" />
Now I'm adding imageviews dynamically.
layout.addView(imageview);
But it is coming top in the hierarchy of layout.
i.e. Whenever I am setting visibility of my include layout as visible. The dynamically added imageviews overlaps it.
How can I add this down in the hierarchy?
Use layout.addView(view,index); to add imageview where index is less than the index of included layout.
Add id in your include layout like
<include android:id="#+id/include1" layout="#layout/some_layout" />
Use RalativeLayout rule like
RelativeLayout.LayoutParams params1 = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
params1.addRule(RelativeLayout.BELOW, R.id.include1);
layout.addView(imageview, params1);
<ImageView
android:id="#+id/wipeID"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_above="#+id/popup_window"
android:layout_alignBottom="#+id/linerID"
android:src="#drawable/wiper_btn"/>
In the above one android:layout_alignBottom="#+id/linerID" is remove programmatically how to remove that one?
If I don't get you wrong you want to change your layout parameters...
So this is roughly how you can achive it:
get your imageview with findViewById(...)
get the layout parameters somehow like this:
LinearLayout.LayoutParams params = ( LinearLayout.LayoutParams) imageView.getLayoutParams();
change them by setting the values you want:
params.setMargins(newX, newY, 0, 0); //for margins
imageView.setLayoutParams(params);
if this does not work (param for align bottom does not exist) you can add rules:
this could help or google something like "android add rule layout param"
hope this leads you to the right track...
Try using this :
imageView.setBaselineAlignBottom(false);
What I Tried To Do
I tried to set my ImageButton's layout_gravity via Java code, the way I want the ImageButton to be is presented like the way within the Orange frame in the image below:
The Blue frame is a vertical LinearLayout act as a "base" layout and this is the layout I tried to add child layouts to.
The Orange and Red are both horizontal LinearLayout.
The Orange layout is the way I want to put the ImageButton and the TextView, this one is set up via XML
The Red layout is the result I tried to mimic the Orange layout via Java code.
The Related Code
Here's the XML code that set up the Orange layout, this is the effect I want to achieve via Java code:
<!-- Begin the Orange Layout -->
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="#dimen/info_left_padding"
android:layout_marginRight="#dimen/info_right_padding" >
<TextView
android:id="#+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:gravity="center_vertical"
android:minHeight="#dimen/detail_min_line_item_height"
android:text="TextView" />
<FrameLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<ImageButton
android:id="#+id/imageButton1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right|center_vertical"
android:adjustViewBounds="true"
android:maxHeight="#dimen/abs__action_bar_default_height"
android:scaleType="fitCenter"
android:src="#drawable/navigation_cancel" />
</FrameLayout>
</LinearLayout>
Here's the Java code that set up the Red layout
int textHeight = (int)getResources().getDimension(R.dimen.detail_min_line_item_height);
int imgHeight = (int)getResources().getDimension(R.dimen.abs__action_bar_default_height);
TextView mTextView = new TextView(this);
ImageButton mDeleteButton = new ImageButton(this);
// Set Delete Button Padding
// mDeleteButton.setPadding(buttonPadding, buttonPadding, buttonPadding, buttonPadding);
// Set Imagebutton Scale type as fitCentre
mDeleteButton.setScaleType(ScaleType.FIT_CENTER);
// Set AdjustViewBounds
mDeleteButton.setAdjustViewBounds(true);
// Set max height of the image
mDeleteButton.setMaxHeight(imgHeight);
// Set the text appearance to be "large"
mTextView.setTextAppearance(this, android.R.style.TextAppearance_Large);
mTextView.setText(text);
// Set the minimum height of this textview
mTextView.setMinHeight(textHeight);
// Set the content of the textview to be centred
mTextView.setGravity(Gravity.CENTER_VERTICAL);
// Set the ImageButton's background image
mDeleteButton.setImageResource(R.drawable.navigation_cancel);
LinearLayout.LayoutParams hParams = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
LinearLayout hLayout = new LinearLayout(this);
// Set Margins
hParams.leftMargin = (int) getResources().getDimension(R.dimen.info_left_padding);
hParams.rightMargin = (int) getResources().getDimension(R.dimen.info_right_padding);
hParams.bottomMargin = (int) getResources().getDimension(R.dimen.text_layout_margin);
hLayout.setLayoutParams(hParams);
// Set orientation to horizontal
hLayout.setOrientation(LinearLayout.HORIZONTAL);
// The settings below is actually setting up some of the button's parameters
LinearLayout.LayoutParams buttonParams = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
buttonParams.gravity = Gravity.RIGHT;
mDeleteButton.setLayoutParams(buttonParams);
hLayout.addView(mTextView);
hLayout.addView(mDeleteButton);
layout_blue.addView(hLayout);
What I've Tried So Far
According to some SO post like this: Java method for android:layout_gravity I initially tried to first put my ImageButton into a FrameLayout then set the params of this FrameLayout, like this:
FrameLayout buttonFrame = new FrameLayout(this);
FrameLayout.LayoutParams buttonParams = new FrameLayout.LayoutParams(android.widget.FrameLayout.LayoutParams.WRAP_CONTENT,
android.widget.FrameLayout.LayoutParams.WRAP_CONTENT,
Gravity.RIGHT | Gravity.CENTER_VERTICAL);
buttonFrame.setLayoutParams(buttonParams);
buttonFrame.addView(mDeleteButton);
But I had the same result as the image presented above. Later I also tried to change the LayoutParams width to MATCH_PARENTonly to find theImageButton` was stretched horizontally (Yes it's stretched)
Then I tried the method posted in these two SO posts:
How to set layout_gravity programmatically?
How to set a button's parameters programatically
Their method is to set up a LinearLayout.Params first, then apply this params to the button (The Code I posted in The Related Code section applies this method). In short it is:
// The settings below is actually setting up some of the button's parameters
LinearLayout.LayoutParams buttonParams = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
buttonParams.gravity = Gravity.RIGHT;
mDeleteButton.setLayoutParams(buttonParams);
However, the result was still the same as the image presented above.
Question
Since I need to programmatically add more child views to the Blue layout later, I wonder if there's a way to set up each child layout like the Orange one in the image?
At Last
I found a solution which is quite similar to #Permita 's answer.
Here's my solution:
LinearLayout.LayoutParams textParams = new LinearLayout.LayoutParams(0, LayoutParams.WRAP_CONTENT);
textParams.weight = 1.0f;
mTextView.setLayoutParams(textParams);
Add the below code, it will assign all the available space to the texView, shifting the button to right side of the layout to make it appear like the orangeLayout.
mTextView.setLayoutParams(LayoutParams param = new LinearLayout.LayoutParams(
LayoutParams.MATCH_PARENT,
LayoutParams.MATCH_PARENT, 1.0f));
Try layout_width = "0dp" layout_weight="1" for the TextView. This tells TextView to occupy the whole available width, so that FrameLayout with ImageView will align to the right border.
<TextView
android:id="#+id/textView1"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical"
android:gravity="center_vertical"
android:minHeight="#dimen/detail_min_line_item_height"
android:text="TextView" />
Instead of using the standard LinearLayout, why not try to use the more complex RelativeLayout? With it, you can adjust the locations of each individual view relative to others. You can set the ImageButton in the orange layout to android:layout_alignParentRight="true", which will set the button attached to the right side of the parent layout, the RelativeLayout in my case, but the LinearLayout in yours. Here is the link to the API Guides for Relative Layouts on the Android developers website.
I have created a layout with a database call where a button will be created for each item inside the database. The buttons are created like I need and I also found out, how to set up the layout_width and layout_height but all buttons are placed in the same position and overlap each other so that only the last created button can be accessed. My code for creating the buttons looks like this:
Button bt = new Button(this);
bt.setText("Button Title");
bt.setLayoutParams(new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
linerLayout.addView(bt);
The activity looks like that, after generating the buttons:
I looked at each method that can be used for the button but didn't find anything to define the position. I just thought about following method:
bt.layout(l, t, r, b);
but don't know exactly how to use it and thought there might be a simpler method to solve this problem. Anybody who knows a workaround?!
CHANGED CODE
I just tryied to set the layout parameters like explained from "Chen doron". I have a relative layout inside my xml file:
<RelativeLayout
android:id="#+id/llActOver"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="2" >
</RelativeLayout>
and formatted the generated buttons like this:
Button bt = new Button(context);
bt.setText(c.getString(iDef));
fontClass.setFont(bt);
//RelativeLayout placeholder = new RelativeLayout(context);
RelativeLayout.LayoutParams layoutParam =
new RelativeLayout.LayoutParams(LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT);
if(rowCount < 1){
layoutParam.addRule(RelativeLayout.ALIGN_PARENT_TOP);
rowCount++;
}else{
layoutParam.addRule(RelativeLayout.ALIGN_PARENT_TOP, lastButtonId);
}
lastButtonId = bt.getId();
//placeholder.addView(bt, layoutParam);
linearLayout.addView(bt, layoutParam);
I save the buttons id at the end of the loop so that the last buttons id can be accessed in the next round.
I also tryied to create a new relativ layout for each new button like the commented part of the code shows but even without the new layout nothing happens and i still just have all buttons overlapped.
I finally solved the problem, but just by trying each possible combination of layout types.
I found out, i have to define a LinearLayout inside the XML file and the attribute android:orientation="vertical" is affordable. all the other parameters that have been set before were unimportant.
So now i have a LinearLayout inside a ScrollView in my xml file:
<ScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="2" >
<LinearLayout
android:id="#+id/llActOver"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
</LinearLayout>
</ScrollView>
and inside the java database i have following code to create a button for each row in the db, setting its Text and Font and add it to the loaded layout:
for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()) {
Button bt = new Button(context);
bt.setText(c.getString(iDef));
fontClass.setFont(bt);
linearLayout.addView(bt);
}
and here a screenshot of the result:
maybe somebody else who has the same problem won't need to worry as long as me with this description.
You could use a Relative Layout, and have the first Button align to the parent's top.
Then each button aligned to the previous button's bottom.
Use:
params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
And then:
params.addRule(RelativeLayout.BELOW,ID-Of-Previous-Button);
Also check out:
http://developer.android.com/reference/android/widget/RelativeLayout.LayoutParams.html
This is what i am doing in coding i want to create controls on button click. The number of times the user will click i want to add controls for the same number of time..
I have to add these controls in relative layout. which i had already created in xml layout with one set of controls already in it.. and want to make it working for more controls if user want to edit.
View DynamicView= new View(this);
DynamicView.setId(123);
DynamicView.setLayoutParams(new LayoutParams(1, LayoutParams.MATCH_PARENT))
The following is XML layout code.
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#android:color/black" />
problems:-
1) dont want to give ids this way :(
DynamicView.setId(123);
want to assign such ids as we can assign in xml layout
android:id="#+id/spnrIngredients1"
2) how to give values for relative layouts in coding such as
android:layout_toRightOf="#id/tvIngredientsName"
android:layout_toLeftOf="#id/tvIngredientsName"
android:layout_below="#id/tvIngredientsName"
android:layout_above="#id/tvIngredientsName"
3) how to give values for background colors.
it is not accepting hexadecimal codes or something else.. what type of int values it is asking for..?
2) Use the LayoutParams to set the rules for placing the views in the RelativeLayout:
Button b = new Button(this);
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(
RelativeLayout.LayoutParams.WRAP_CONTENT,
RelativeLayout.LayoutParams.WRAP_CONTENT);
lp.addRule(RelativeLayout.BELOW, viewID);
b.setLayoutParams(lp);
b.setText("Added at Bottom");
mParent.addView(b, lp);
The above code will place the Button bellow the view with the id viewID.
3) setBackgroundColor()(I think this is the method you are using) requires an int representing the Color, you can set it in that method this ways:
Color.RED
Color.parse(Color.parseColor("#0077cc"))
android.R.color.black
1) You could set your ids in a values/ids.xml file and later set them to your views and then refer the views by those ids:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<item type="id" name="myfirstid" />
</resources>
Now you can use the id R.id.myfirstid in your code(I don't know if this is what you want).
NOTE:
I don't know if this is recommended.