I want to construct a generic function which receives a LinearLayout (or another view) and calculate the empty space left in it, so i know how many space i've to fit something into it
The main purpose of it is to set ads, example:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:ads="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/mainView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".activity.MainActivity">
<TextView
android:layout_width="match_parent"
android:layout_height="#dimen/profilePhotoRadius"
/>
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/smallMargin"
android:layout_marginTop="#dimen/smallMargin"
/>
<!-- bunch of other stuff here -->
<com.google.android.gms.ads.AdView
android:id="#+id/adView"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:layout_alignParentBottom="true"/>
</LinearLayout>
then after in my code
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.adView = (AdView) findViewById(R.id.adView);
if (this.adView != null) {
int width = this.adView.getMeasuredWidth();
int height = this.adView.getHeight();
}
but running this code width and height are always zero... i tried to use getWidth() and result is always zero
how can i get the real value?
In OnCreate() you are are just inflating the layout. The UI has not been sized and laid out on the screen yet.You are calling getWidth() and getHeight() too early.
You can try this:
#Override
protected void onCreate(#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
this.adView = (AdView) findViewById(R.id.adView);
this.adView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
touchView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
}
else {
touchView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
}
float Width = this.adView.getWidth();
float Height =this.adView.getHeight();
...
}
});
Try it in onWindowFocusChanged (boolean hasFocus) method. From the documentation:
This is the best indicator of whether this activity is visible to the
user
Related
With the following Java and XML code, I was wondering how to retrieve the dimensions in pixels of an inner/child layout (LinearLayout, whereas the parent is RelativeLayout with paddings of 20dp) properly:
Java code:
public class TestActivity extends Activity {
private LinearLayout linLay;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_test);
linLay = (LinearLayout)findViewById(R.id.linLay);
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,
RelativeLayout.LayoutParams.MATCH_PARENT);
linLay.setLayoutParams(lp);
getDimensions();
}
private void getDimensions() {
System.out.println(linLay.getHeight());
System.out.println(linLay.getWidth());
}
}
XML:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:padding="20dp" >
<LinearLayout
android:id="#+id/linLay"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_centerVertical="true"
android:layout_centerHorizontal="true">
</LinearLayout>
</RelativeLayout>
... Since I get outputs of 0 for the dimensions, I am aware that the LinearLayout needs to be set first on the screen before I could retrieve the dimensions... But what am I doing wrong here?
It didn't get its dimensions at the time you try to output them.You can just add a delay or just use method below.
private void getDimensions() {
ViewTreeObserver vto = linLay.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener(){
#Override
public voidonGlobalLayout() {
linLay.getViewTreeObserver().removeGlobalOnLayoutListener(this);
int height =linLay.getMeasuredHeight();
int width =linLay.getMeasuredWidth();
System.out.println(height);
System.out.println(width);
}
});
}
I create layout (ContentLayout) with wrap_content.
And I want to show loading layout (LoadingLayout) same size as ContentLayout above it.
Something like this:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout.
android:id="#+id/ContentLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
...
</LinearLayout>
<RelativeLayout
android:id="#+id/LoadingLayout"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
...
</RelativeLayout>
</RelativeLayout>
But when I want set LoadingLayout size in onMeasure, it will be set to right size only in second chance.
Works only something like this:
Activity
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams) loadingLayout.getLayoutParams();
params.height = getMeasuredHeight();
loadingLayout.setLayoutParams(params);
super.onMeasure(widthMeasureSpec, heightMeasureSpec); // android realignment hack
}
I think this is a hack. Do you have a better solution?
If I understood correctly, you need LoadingLayout to keep width of ContentLayout
<RelativeLayout
android:id="#+id/LoadingLayout"
android:layout_alignLeft="#id/ContentLayout"
android:layout_alignRight="#id/ContentLayout"
....>
....
</RelativeLayout>
Edit: Below is one way for the height
You can add a one time listener when global refresh happens. Then all sizes will be available.
// in your activity
#Override
protected void onCreate(Bundle state) {
final View loading = findViewById(R.id.LoadingLayout);
final View content = findViewById(R.id.ContentLayout);
content.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
content.getViewTreeObserver().removeOnGlobalLayoutListener(this);
loading.getLayoutParams().height = content.getHeight();
loading.onRequestLayout();
loading.invalidate();
}
}
}
I'm trying to find the center coordinates of a RelativeLayout that for the moment, is empty. I need to find the center before I can put anything into the Relative Layout. The Relative Layout is not the whole screen, so I can't use metrics to find the screen dimensions. Since my minimum API is 10, I can't use rLayout.getX() or rLayout.getY(). So what I've tried is:
int xScreenInt = gBoard_RL.getWidth()/2;
int yScreenInt = gBoard_RL.getHeight()/2;
int xInt = gBoard_RL.getLeft() + xScreenInt;
int yInt = gBoard_RL.getTop() + yScreenInt;
and all I get is 0,0. Does anyone have an any ideas how I can get this done? Here's my layout and the Activity so far:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/gb1_root_RL"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FFFFFF"
tools:context=".GB1" >
<RelativeLayout
android:id="#+id/gb1_topInfo_RL"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:background="#drawable/blu_grade_bg"
android:orientation="vertical"
android:paddingBottom="15dp" >
<TextView
android:id="#+id/gb1_scValue_TV"
style="#style/mainScoreValueStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="#+id/gb1_score_TV"
android:layout_marginLeft="10dp" />
<TextView
android:id="#+id/gb1_timeValue_TV"
style="#style/mainTimeValueStyle"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_below="#+id/gb1_time_TV"
android:layout_marginRight="10dp" />
</RelativeLayout>
<RelativeLayout
android:id="#+id/gb1_gf_RL"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_below="#+id/gb1_topInfo_RL"
android:padding="10dp" >
</RelativeLayout>
the Relative Layout I need to find the center of is: android:id="#+id/gb1_gf_RL"
public class GB1 extends Activity {
TextView GScore_TV;
RelativeLayout gBoard_RL;
int xScreenInt, yScreenInt, xInt, yInt;
String xStr, yStr;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
overridePendingTransition(R.anim.cutin, R.anim.cutout);
setContentView(R.layout.gb_layout);
GScore_TV = (TextView) findViewById(R.id.G1_scoreValue_TV);
gBoard_RL = (RelativeLayout) findViewById(R.id.gb1_gf_RL);
gBoard_RL.setBackgroundColor(Color.MAGENTA);
xScreenInt = gBoard_RL.getWidth()/2;
yScreenInt = gBoard_RL.getHeight()/2;
xInt = gBoard_RL.getLeft() + xScreenInt;
yInt = gBoard_RL.getTop() + yScreenInt;
xStr = String.valueOf(xInt);
yStr = String.valueOf(yInt);
GScore_TV.setText(xStr + ", " + yStr);
}
}
Try putting your code in a onGlobalLayout listener:
myRelativelayout.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
this.layout.getViewTreeObserver().removeGlobalOnLayoutListener(this);
//Your code here
}
});
EDIT:
Since, as #xorgate pointed out, the layout isnt drawn yet in the onCreate method. The onGlobalLayout method will be called when the layout is drawn and calculations such as yours should be done in there.
onCreate is called before a layout pass is done. All Views will have no size yet.
Try setting a global layout listener, and do the positioning code there.
I want to create square buttons, but because I can't get the width by XML to assign it to button's height, I'm doing it by Java. So I do this:
View body = inflater.inflate(R.layout.picker_numeric, null);
Button up = (Button) body.findViewById(R.id.picker_numeric_up);
Log.d(TAG, "" + up.getWidth());
int height = up.getWidth();
up.setHeight(height);
........................
AlertDialog.Builder builder = new AlertDialog.Builder(activity)
.setTitle(title)
.setView(body)
........................
I used Log.d to confirm that getWidth() returns 0.
Anyone knows why this happens? I'm out of options.
EDIT:
After what MKJParekh and Simon said my code is this:
dialogContent.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/picker_numeric_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:baselineAligned="false"
android:padding="#dimen/padding_small"
android:weightSum="3"
tools:ignore="HardcodedText,UselessParent" >
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical" >
<Button
android:id="#+id/picker_numeric_up"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="#dimen/padding_medium"
android:layout_marginRight="#dimen/padding_medium"
android:gravity="center"
android:text="+" />
<EditText
android:id="#+id/picker_numeric_value"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="#dimen/padding_medium"
android:layout_marginRight="#dimen/padding_medium"
android:gravity="center"
android:inputType="number" />
<Button
android:id="#+id/picker_numeric_down"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="#dimen/padding_medium"
android:layout_marginRight="#dimen/padding_medium"
android:gravity="center"
android:text="-" />
</LinearLayout>
</LinearLayout>
Method in dialog's creator class:
public void equalDimens() {
up.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED),
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
int height = up.getMeasuredWidth();
android.util.Log.d("dd", ""+height);
up.setLayoutParams(new LinearLayout.LayoutParams(height, height));
down.setLayoutParams(new LinearLayout.LayoutParams(height, height));
}
Then in Activity's Class:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
createMyDialog();
LinearLayout mainLayout = (LinearLayout ) this.getLayoutInflater().inflate(R.layout.main, null);
mainLayout.getViewTreeObserver().addOnGlobalLayoutListener(
new ViewTreeObserver.OnGlobalLayoutListener() {
public void onGlobalLayout() {
myDialogClass.equalDimens();
}
});
setContentView(mainLayout);
}
Without calling myDialogClass.equalDimens() I obtain this:
And calling the method I obtain this:
You need to measure your view before you can get height and width of the view.
You can do it like this,here ll2 is your any view object
ll2.measure(
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED),
MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
int height = ll2.getMeasuredHeight();
int width = ll2.getMeasuredWidth();
And after getting the height and width you will need to set them as,
ll2.setLayoutParams(new LayoutParams(width, height));
You view is measured and inflated but not yet drawn in onCreate.
You can use (amongst other solutions):
#Override
public void onWindowFocusChanged(boolean hasFocus) {
super.onWindowFocusChanged(hasFocus);
// get width here
}
If you can't use this, e.g. you have dialog boxes spawned from your activity, try a global layout listener.
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
// inflate your main layout here (use RelativeLayout or whatever your root ViewGroup type is
LinearLayout mainLayout = (LinearLayout ) this.getLayoutInflater().inflate(R.layout.main, null);
// set a global layout listener which will be called when the layout pass is completed and the view is drawn
mainLayout.getViewTreeObserver().addOnGlobalLayoutListener(
new ViewTreeObserver.OnGlobalLayoutListener() {
public void onGlobalLayout() {
// measure your views here
}
}
);
setContentView(mainLayout);
}
I see some questions about "ImageView"s, but I need a FrameLayout.
I have a FrameLayout, which I need its width:height = 2:1, and the width is fill_parent. There are many image views inside the frame layout, I can just set them width=fill_parent and height=fill_parent.
I don't find a way to do this, please help .
My xml code is:
<FrameLayout
android:id="#+id/cardView"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:layout_centerInParent="true">
<ImageView
android:id="#+id/frameView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:scaleType="fitXY"
android:src="#drawable/card_style1"
/>
</FrameLayout>
See if this is what you want:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.your_layout);
final FrameLayout target = (FrameLayout) findViewById(R.id.frame_id);
target.post(new Runnable() {
#Override
public void run() {
int width = target.getWidth();
int height = width / 2;
LayoutParams lp = target.getLayoutParams();
lp.height = height;
target.setLayoutParams(lp);
}
});
}