I’m building a UI, and it’s all static defined in the XML. All of it has weights all over the place, and while it looks right, I wanted to see that things actually have the right height and all. The problem is that no matter where I call .getHeight() for my format layout I got 0. I tried in both onCreate() and onStart(). Same thing. Happens for all UI objects too. Any idea?
package com.app.conekta;
import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.Window;
import android.widget.Button;
import android.widget.FrameLayout;
import android.widget.Toast;
public class Conekta extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_NO_TITLE);
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
@Override
public void onStart() {
super.onStart();
}
@Override
public void onResume() {
super.onResume();
FrameLayout fl1 = (FrameLayout) findViewById(R.id.headerFrameLayout);
FrameLayout fl2 = (FrameLayout) findViewById(R.id.footerFrameLayout);
Button b=(Button) findViewById(R.id.searchButton);
Log.d("CONEKTA", String.valueOf(b.getHeight()));
}
}
XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<FrameLayout
android:id="@+id/headerFrameLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.05"
android:background="#597eAA" >
<ImageView
android:id="@+id/logoImage"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#7ba1d1"
android:src="@drawable/logo_conekta" />
</FrameLayout>
<LinearLayout
android:id="@+id/bodyLinearLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.7"
android:background="#f3f3f3"
android:orientation="horizontal" >
<FrameLayout
android:id="@+id/leftBlankFrameLayout"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="0.15"
android:background="#f3f3f3" >
</FrameLayout>
<LinearLayout
android:id="@+id/centerVerticalLayout"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="0.7"
android:orientation="vertical" >
<FrameLayout
android:id="@+id/topCenterFrameLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.35" >
</FrameLayout>
<TextView
android:id="@+id/venueLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.025"
android:text="What are you looking for?"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#000000" />
<EditText
android:id="@+id/venueTextField"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.025" >
<requestFocus />
</EditText>
<FrameLayout
android:id="@+id/middleCenterFrameLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.05" >
</FrameLayout>
<TextView
android:id="@+id/locationLabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0.025"
android:text="Where?"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#000000" />
<AutoCompleteTextView
android:id="@+id/locationTextField"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.025"
android:text="" />
<LinearLayout
android:id="@+id/buttonLinearLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.05"
android:background="#f3f3f3"
android:orientation="horizontal" >
<FrameLayout
android:id="@+id/leftButtonLinearLayout"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="0.1" >
</FrameLayout>
<Button
android:id="@+id/searchButton"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="0.8"
android:background="#6fa8dc"
android:text="Search" />
<FrameLayout
android:id="@+id/rightButtonLinearLayout"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="0.1" >
</FrameLayout>
</LinearLayout>
<FrameLayout
android:id="@+id/bottomCenterFrameLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.35" >
</FrameLayout>
</LinearLayout>
<FrameLayout
android:id="@+id/rightBlankFrameLayout"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:layout_weight="0.15"
android:background="#f3f3f3" >
</FrameLayout>
</LinearLayout>
<FrameLayout
android:id="@+id/footerFrameLayout"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.15"
android:background="#7ba1d1" >
</FrameLayout>
</LinearLayout>
In short, the views are not built yet in onCreate(), onStart(), or onResume(). Since they technically don’t exist (as far as the ViewGroup is concerned), their dimensions are 0.
In long, you can go here for a better explanation on how to handle it.
How to retrieve the dimensions of a view?