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Choose checkbox checked programmatically android

I'm working on android app that creat layout with textView & checkbox programmatically for each text user input in EditText, and when the user select one of the checkbox and click on delete button the layout that contain that checkbox remove from the main layout
public void plusBtn(View view)
{
item = actv.getText().toString(); // text from EditText
actv.setText("");
creatt();
}
public void deletBtn(View view)
{
if(chbox.isChecked()){
linear.removeView(linr);
}
}
public void creatt()
{
linr = new LinearLayout(this);
linr.setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
linr.setOrientation(LinearLayout.HORIZONTAL);
linr.setGravity(Gravity.RIGHT);
TextView txt = new TextView(this);
txt.setText(item);
linr.addView(txt);
chbox = new CheckBox(this);
linr.addView(chbox);
linear.addView(linr); // main layout
}
But when I click on delete button just the last layout removed, and that not what I want.

though the technique you're using is not fine. but let me give you a shortcut. in your deletBtn method try to get the reference of the desired deleted view (try to handle case of id or boolean you've to make logic) and enclose this line linear.removeView(linr); into that condition.
Summery, only delete the view which meets the condition.
Alternative, do your whole task from scratch with the help of Recycler-view. as it Recycler-view will give you exact location of cell.

Android: Programatically rotating the text inside a button

{Visual Aid}
I am making an application with a drag and drop menu. User can fill out three edit texts (width, height, and rotation) then press on "add new" button and a new button with the specified values is created at the origin. However if the rotation attribute is anything other than 0 say 45 degrees, then it rotates the whole button along with the text. I would like for the text to remain horizontal with no rotation. I have looked up but the post all refer back to the rotation attribute which i am already using.
onViewCreated()
tvAddTable = view.findViewById(R.id.btn_add_table);
tvWidth = view.findViewById(R.id.et_width);
tvHeight = view.findViewById(R.id.et_height);
tvRotation = view.findViewById(R.id.et_rotation);
mSize = new Point();
mDisplay = Objects.requireNonNull(getActivity()).getWindowManager().getDefaultDisplay();
mDisplay.getSize(mSize);
final View.OnTouchListener touchListener = this;
tvAddTable.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {[enter image description here][1]
ConstraintLayout layout = view.findViewById(R.id.floor_layout);
//set the properties for button
Button btnTag = new Button(getContext());
btnTag.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
if(ids.isEmpty()){
ids.add(0);
}else{
ids.add(ids.size());
}
btnTag.setId(ids.size());
btnTag.setText(Integer.toString(btnTag.getId()));
//add button to the layout
layout.addView(btnTag);
btnTag.setLayoutParams(new ConstraintLayout.LayoutParams(Integer.parseInt(tvWidth.getText().toString()), Integer.parseInt(tvHeight.getText().toString())));
btnTag.setRotation(Integer.parseInt(tvRotation.getText().toString()));
btnTag.setOnTouchListener(touchListener);
}
});

The rotation attribute rotates the entire view, not just the text or just the background. That's by design. There is no text or background rotation attribute. If you need that, make a custom view.
If you only want the background to rotate, you can probably do it by setting the background drawable to a RotateDrawable that wraps the background you want.

How to hide and show a layout on scrolling down a scroll view in Android?

I have a particular layout which consist a scroll view and an image which is at bottom of the activity. My question is that when I start scrolling up that image will not visible and when the scroll reach to top it is visible again.
I attached my image link so that you get the idea what I want.

You can achieve this easily with android support widget CoordinatorLayout.
Follow this post to hide/show the image based on scrolling.
You can learn more about coordinator layout here

scrollView.getViewTreeObserver().addOnScrollChangedListener(new ViewTreeObserver.OnScrollChangedListener() {
#Override
public void onScrollChanged() {
if (scrollView != null) {
if (scrollView.getChildAt(0).getBottom() <= (scrollView.getHeight() + scrollView.getScrollY())) {
relativeLayout.setVisibility(View.VISIBLE);
}
else {
relativeLayout.setVisibility(View.INVISIBLE);
}
}
}
});

Here is something that you should try out
ScrollView sv = (ScrollView)findViewById(R.id.scrl);
sv.scrollTo(0, sv.getTop());
and when it gets to top show the visibility of the image view as visible and in else part make it gone...

Unable to enter the if statement | Android Studio

I am trying to fade two images back and forth:
Image1 with an id of imageone
Image2 with an id of imagetwo
For both the images, I have linked onClick in UI properties to the onClick method in the below Java code.
After the launching the app, when I click on image1, it is supposed to fade out and image2 should fade IN.
After analysis, I determined that the flow is not entering the if statement and is always getting directed to else no matter what.
How can I solve this?
Why is the if statement if (view.getId() == R.id.imageone) not letting the flow inside it even though the entry condition view.getId() == R.id.imageone is true?
public class MainActivity extends AppCompatActivity {
public void onClick(View view) {
ImageView imageone = (ImageView) findViewById(R.id.imageone);
ImageView imagetwo = (ImageView) findViewById(R.id.imagetwo);
if (view.getId() == R.id.imageone) {
imageone.animate().alpha(0f).setDuration(2000);//image1 fade OUT
imagetwo.animate().alpha(1f).setDuration(2000);//image2 fade IN
} else {
imagetwo.animate().alpha(0f).setDuration(2000);//image2 fade OUT
imageone.animate().alpha(1f).setDuration(2000);//image1 fade IN
}
}
}

#Narendra Jadon : You are right ,The problem was with the layout. The image two was on top of image one. And i solved it by setting the image one on top of image 2. Thank you everyone for your help.

setBackgroundDrawable works correctly; until another button is pressed, why?

In my app I have 4 main buttons, plus another 2. These 4 buttons are declared at the beginning of the main activity.
Button button1, button2, button3, button4;
button1 = (Button) findViewById(R.id.button1);
button1.setTag("blue");
(each button has a tag and is set the same way as button1)
The four buttons I want to cycle through different colours when they are pressed. I manage this by;
public void button1(View v) {
if ("blue".equals(button1.getTag())) {
button1.setBackgroundDrawable(getResources().getDrawable(
R.drawable.brown));
button1.setTag("brown");
} else if ("brown".equals(button1.getTag())) {
button1.setBackgroundDrawable(getResources().getDrawable(
R.drawable.red));
button1.setTag("red");
} else if //...etc
This works all well and good until I press any of the two buttons, an example code of one of the buttons
public void back(View v) {
setContentView(R.layout.main);
t = new TextView(this);
t = (TextView) findViewById(R.id.textView1);
t.setText("");
}
Once I press any of the two buttons the colours change back to the original drawable set in the xml file
android:background="#drawable/blue"
Now when I press the 4 main buttons the drawable does not change, but I definitely know that it is getting re-tagged, so why won't it change the drawable after I press the button?

If your 'two buttons' onClick handler makes a call to Activity.setContentView(int), then all of the buttons will reset to how they are specified in the original XML layout. New views will be inflated and these will not have a tag (you do not seem to be re-setting the tags after the call to setContentView). A null tag will not match any of your colour strings and so your buttons will not cycle their background.
If you want to maintain the views how they were, then do not reset the content view of the Activity. In most cases, setContentView is only called once per lifetime of an Activity, although obviously there can be a few exceptions.