I'm trying to add textviews one just bellow another but when I run the code, it all gets stacked together. Here is the code:
RelativeLayout constraintLayout;
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams
(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
private void createTable() {
RelativeLayout textRelativeLayout = new RelativeLayout(this);
relativeLayout.addView(textRelativeLayout);
for (int i = 1; i <= 5; i++) {
TextView textView = new TextView(this);
textView.setText("TextView " + String.valueOf(i));
setTextViewAttributes(textView);
textView.setId(i);
params.addRule(RelativeLayout.ALIGN_BOTTOM, textView.getId());
textRelativeLayout.addView(textView);
}
}
Since first I'm trying to make it work, I'm only setting dummy text for now. Is it my code that is wrong? Or did I miss a Param?
You didn't use param.
It should be textRelativeLayout.addView(textView , param);
Or use textView.setLayoutParams(params)
And I think the rule should be (I'm not tested this ):
params.addRule(RelativeLayout.BELOW, previousTextView.getId());
Also it is better to use a LinearLayout with vertical orientation to add view under other view.
You should use LinearLayout instead of RelativeLayout.
Make sure you set the orientation to 'vertical' for the LinearLayout as well.
No need to add rules to params like you're doing for the LinearLayout. They will get order from top to bottom automatically.
Related
I'm trying to put some TextView programmatically in my activity. The problem is that I cannot set their margins (top margin), so that there is some space between them.
The XML layout structure is the following:
<ScrollView>
<RelativeLayout_1>
<RelativeLayout_2>
<TextView/>
<EditText/>
</RelativeLayout>
</RelativeLayout>
</ScrollView>
I omitted all the unnecessary information.
Then in my Activity I do
mLayout = (RelativeLayout) findViewById(R.id.relative_layout);
RelativeLayout.LayoutParams relativeParams = new RelativeLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
relativeParams.addRule(RelativeLayout.ALIGN_LEFT, R.id.handicap_layout);
relativeParams.addRule(RelativeLayout.BELOW, R.id.handicap_layout);
TextView[] texts = new TextView[6];
for(int i=0; i<6; i++) {
texts[i] = new TextView(MyActivity.this);
texts[i].setText("Text " + (i+1));
texts[i].setTextSize(20);
relativeParams.setMargins(0, 10+(10*i), 0, 0); /* trying to increase the margin */
texts[i].setLayoutParams(relativeParams);
mLayout.addView(texts[i]);
}
where mLayout refers to RelativeLayout_1 and handicap_layout to RelativeLayout_2.
The problem is that the margins do not increase and the TextView are showed one above the other.
Has anyone a solution? Thank you!
EDIT: SOLVED
Ok, I managed to solve the problem: the LayoutParams have to be declared inside the for cycle.
Thanks.
Take one textview xml file. In that take margins. Once that is done inflate that textview.
TextView itemview = (TextView)getLayoutInflater().inflate(R.layout.equipment_item, null);
once that is done set your text to that layout.
I think you alredy find the relative layout right. Then add that itemview to relative layout like below.
equipmentdetails_layout.addView(itemview);
Then you can get the margins.
I have a method that creates several buttons
public Button[] generaBottoniRisposta(int numeroBottoni, Context context){
Button bottoni[]= new Button[numeroBottoni];
/*genero un tot di bottoni in base a numeroBottoni, รจ necessario avere il context*/
for(int i=0; i < bottoni.length;i++){
bottoni[i] = new Button(context);
bottoni[i].setId(i);
bottoni[i].setText(String.valueOf(i+1));
LayoutParams param = new LinearLayout.LayoutParams(50, 50);
bottoni[i].setLayoutParams(param);
}
return bottoni;
}
and then another method that add them to a gridlayout.
I want to set the width of those buttons, but i'm not able to do it.
I tried a lot of stuff, setWidth(), setMaxWidth(), invalidate() etc.
Something weird happens. If I try to make the button bigger than its default size it works, if i try to make the button smaller than its default size it doesn't work!
How should I do? thank you
Try using LayoutParams, something like..
RelativeLayout.LayoutParams rel_bottone = new RelativeLayout.LayoutParams(buttonWidth, buttonHeight);
button.setLayoutParams(rel_bottone);
And the layout depends on the parent layout that contains the buttons..
I think setlayoutparams should do what you want. Like in the answer in this thread.
Set View Width Programmatically
try this:
LinearLayout.LayoutParams params = button.getLayoutParams();
params.width = 100;
button.setLayoutParams(params);
one more thing LinearLayout.LayoutParams is used when parent is a LinearLayout and when parent is RelativeLayout use RelativeLayout.LayoutParams.
Try something like this :
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(width, height);
button.setLayoutParams(params);
My buttons are inside a gridlayout. I tried to use GridLayout.LayoutParams giving the width of the cells, instead of trying to set the width of the button, and now it seems to work.
this is the code I use to add the buttons to the GridLayout
Spec row = GridLayout.spec(numeroRiga, 1);
Spec colspan = GridLayout.spec(numeroColonna, 1);
GridLayout.LayoutParams gridLayoutParam = new GridLayout.LayoutParams(row,colspan);
gridLayoutParam.width=50;
gridLayoutParam.height=50;
gridLayout.addView(button,gridLayoutParam);
But i'm wondering if i can set the width of the buttons in a similar way.
I've a RelativeLayout which consists of an ImageView and TextView. Now, to this RelativeLayout I want to add a LinearLayout, which should be aligned below the TextView. Right now, the LinearLayout is added to the RelativeLayout, but it is not aligned below the TextView. Here is my code :
void addRatingToImage(RelativeLayout relativelLayout, Movies movieObject) {
ImageView ratingImageView;
LinearLayout ratingLayout = new LinearLayout(mContext);
ratingLayout.setOrientation(LinearLayout.HORIZONTAL);
double roundedRating = roundUpRating(Double.parseDouble(movieObject.mRating));
for(int i = 0; i < 5; i++) { //TODO: Check
ratingImageView = new ImageView(mContext);
if(i < roundedRating) {
ratingImageView.setBackgroundResource(R.drawable.star_2);
ratingLayout.addView(ratingImageView);
}
else {
ratingImageView.setBackgroundResource(R.drawable.star_1);
ratingLayout.addView(ratingImageView);
}
}
RelativeLayout.LayoutParams ratingLayoutParams = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
TextView movieNameTextView = (TextView)relativelLayout.getChildAt(2);
ratingLayoutParams.addRule(RelativeLayout.BELOW, movieNameTextView.getId());
ratingLayout.setLayoutParams(ratingLayoutParams);
relativelLayout.addView(ratingLayout);
}
I have one doubt here. Does RelativeLayout.BELOW work, when it is applied to a different kind of layout, nested in a RelativeLayout? Thanks.
Yes, RelativeLayout.BELOW will work. It is recognized by parent RelativeLayout no matter what the child view class is.
According to your problem, I suppose that RelativeLayout is behaving that way because you've set fill_parent for your TextView movieNameTextView's layout width.
I am adding dynamic text view to view flipper like below.
Everything is working perfectly, but how can i center each text view at center of View Flipper, i have looked for the gravity option but i think it doesn't support. As the text view contains different text length i want every text view to be at center of view flipper.
for(int i = 0; i < 10; i++){
TextView tv = new TextView(this);
vf.addView(tv, i);
}
Thanks
I think this may help :
ViewFlipper flipper = new ViewFlipper(this);
TextView textView = new TextView(this);
textView.setGravity(Gravity.CENTER);
textView.setText("Hello World");
flipper.addView(textView);
setContentView(flipper);
Are you talking about gravitiy we can set this way, or a layout gravity you have tried actually?
tv.setGravity(Gravity.CENTER);
Try to set ViewFlippers width in xml as
android:layout_width="wrap_content"
I had an similar problem and this worked fine.
You can do this way,
TextView tv = new TextView(this);
LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
param.gravity = Gravity.CENTER;
tv.setLayoutParams(param);
Ok i got the answer, actually you need to add linearlayout to viewflipper then add children to linearlayout with giving gravity parameter to linear layout.
I want to create a relative Layout dynamically through code with 2 Textviews one below the other.How to implement android:layout_below property through code in Android.
can anyone help me in sorting out this issue.
Thanks in Advance,
final TextView upperTxt = (...)
upperTxt.setId(12345);
final TextView lowerTxt = (...);
final RelativeLayout.LayoutParams params = RelativeLayout.LayoutParams(this, null);
params.addRule(RelativeLayout.BELOW, 12345);
lowerTxt.setLayoutParams(params);
Here is my solution for my special Problem.
In case the username wouldn't be found in the db i had to create a RelativeLayout that looks like the xml-generated one.
// text view appears on top of the edit text
enterNameRequest = new TextView(mainActivity.getApplicationContext());
// fill the view with a string from strings.xml
enterNameRequest.setText(mainActivity.getResources().getString(R.string.enterNameRequest));
// edit text appears below text view and above button
enterName = new EditText(mainActivity.getApplicationContext());
enterName.setId(667);
// button appears at the bottom of the relative layout
saveUserName = new Button(mainActivity.getApplicationContext());
saveUserName.setText(mainActivity.getResources().getString(R.string.useUserName));
saveUserName.setId(666);
// generate the relative layout
RelativeLayout layout = new RelativeLayout(mainActivity.getApplicationContext());
layout.setId(668);
// set a background graphic by its id
layout.setBackgroundDrawable(mainActivity.getApplicationContext().getResources().getDrawable(R.drawable.background_head_neutral));
// runtime told me that i MUST use width and height parameters!
LayoutParams params2 = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
params2.addRule(RelativeLayout.ABOVE, 666);
enterName.setLayoutParams(params2);
LayoutParams params3 = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
params3.addRule(RelativeLayout.ABOVE, 667);
enterNameRequest.setLayoutParams(params3);
LayoutParams params4 = new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT);
params4.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, 668);
saveUserName.setLayoutParams(params4);
// add views
layout.addView(enterNameRequest);
layout.addView(enterName);
layout.addView(saveUserName);
/* todo: set button action */
mainActivity.setContentView(layout);
What i found out additionally:
It is not so good to manipulate the layout manually from within java!
You should better use a new Activity and set a new layout in it.
This way, the application-code is readable a lot better!
I even tried to set several layouts (not manually, but wit setContentView) in one activity, and it turned out that i didn't know where what was accessing what else... Also, i had a great problem in adding onClickListeners... so you better use -- android:onClick="myButtonMethod" -- in your button tag in the xml and have a method in your according activity, which uses the layout, like this:
public void myButtonMethod(View v){
// do stuff
}
This improves performance because you are not using additional Listeners - but you use the already available Listener that is bound to your activity in every case.
u can try this
LinearLayout.LayoutParams leftMarginParams = new LinearLayout.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);``
leftMarginParams.leftMargin = 50;
Button btn1 = new Button(this);
btn1.setText("Button1");
linLayout.addView(btn1, leftMarginParams)