Android: Set ALIGN_PARENT_RIGHT is not working

alignment, android, layout

Solution

The problem is with the parent layout. It is set to `wrap_content`.

Change the width of the parent `RelativeLayout` to `match_parent` and most likely the problem should be fixed.

<RelativeLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/RelativeLayout01" >

Updated Answer

Along with the above the problem is that, when the preference changes between `0` to `1` and back to `0` you never remove the previously assigned `rule`. (You only call `params.addRule(..)` ). This is the problem as now it has both `ALIGN_PARENT_RIGHT` and `ALIGN_PARENT_LEFT`.

To resolve this, you could use the `removeRule()` method:

if(sharedpreference.getInt("CHANGESITE", 0) == 0){
    RelativeLayout relativeLayout= (RelativeLayout)findViewById(R.id.rl_changesite);
    RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams)relativeLayout.getLayoutParams();

    params.removeRule(RelativeLayout.ALIGN_PARENT_RIGHT);
    params.addRule(RelativeLayout.ALIGN_PARENT_LEFT);
    relativeLayout.setLayoutParams(params);
    sharedpreference.setInt("CHANGESITE", 1);
}
else {
    RelativeLayout relativeLayout= (RelativeLayout)findViewById(R.id.rl_changesite);
    RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams)relativeLayout.getLayoutParams();

    params.removeRule(RelativeLayout.ALIGN_PARENT_LEFT);
    params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
    relativeLayout.setLayoutParams(params);
    sharedpreference.setInt("CHANGESITE", 0);
}

This method is only supported from `API LEVEL 17 (JELLY_BEAN_MR1)`.

For lower version, simply create a new layout param and assign it to the `RelativeLayout` as follows:

if(sharedpreference.getInt("CHANGESITE", 0) == 0){
    RelativeLayout relativeLayout= (RelativeLayout)findViewById(R.id.rl_changesite);
    RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    params.addRule(RelativeLayout.ALIGN_PARENT_LEFT); // add other rules from XML also
    relativeLayout.setLayoutParams(params);
    sharedpreference.setInt("CHANGESITE", 1);
}
else {
    RelativeLayout relativeLayout= (RelativeLayout)findViewById(R.id.rl_changesite);
    RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT);
    params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT); // add other rules from XML also
    relativeLayout.setLayoutParams(params);
    sharedpreference.setInt("CHANGESITE", 0);
}

Note: for method 2, you will have to add other rules from your XML file programmatically as you create a new instance of layout params each time so those defined in XML are not applied anymore.

Problem

I try to make an application, where the user can set a "one hand layout" for big devices to input the numbers with only one hand. (See the image for what I am meaning) When I press on "L" the layout turns to left. This is working. But after this, when I press on L the layout doesn't move. I don't get why... Could you explain me what I am doing wrong please? Button "L": ``` Button cmd_change = (Button) findViewById(R.id.cmd_changesite); cmd_change.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { Log.v("TEST: ", ""+shellpreference.getInt("CHANGESITE", 0)); if(sharedpreference.getInt("CHANGESITE", 0) == 0){ RelativeLayout relativeLayout= (RelativeLayout)findViewById(R.id.rl_changesite); RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams)relativeLayout.getLayoutParams(); params.addRule(RelativeLayout.ALIGN_PARENT_LEFT); relativeLayout.setLayoutParams(params); sharedpreference.setInt("CHANGESITE", 1); }else{ RelativeLayout relativeLayout= (RelativeLayout)findViewById(R.id.rl_changesite); RelativeLayout.LayoutParams params = (RelativeLayout.LayoutParams)relativeLayout.getLayoutParams(); params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT); relativeLayout.setLayoutParams(params); sharedpreference.setInt("CHANGESITE", 0); } } }); ``` Layout XML: ``` <?xml version="1.0" encoding="utf-8"?>  <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:layout_marginBottom="5dp" android:layout_marginLeft="10dp" android:layout_marginRight="10dp" android:layout_marginTop="5dp" android:background="@drawable/bg1200x800" android:orientation="vertical" >   <RelativeLayout android:id="@+id/rl_betraege" android:layout_width="wrap_content" android:layout_height="180dp" android:layout_alignParentLeft="true" > <RelativeLayout android:id="@+id/relativeLayout5" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentLeft="true" android:layout_marginBottom="10dp" > <RelativeLayout android:id="@+id/relativeLayout4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentRight="true" android:layout_marginLeft="10dp" android:layout_marginRight="10dp" android:layout_marginTop="10dp" > <TextView android:id="@+id/txt_netto_desc" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Netto" android:textSize="18dip" /> <TextView android:id="@+id/TextView05" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_centerVertical="true" android:text=".-" android:textSize="18dip" /> <TextView android:id="@+id/txt_nettobetrag" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_toLeftOf="@+id/TextView05" android:text="0.00" android:textSize="18dip" /> </RelativeLayout> <ImageView android:id="@+id/imageView2" android:layout_width="wrap_content" android:layout_height="1dp" android:layout_alignParentLeft="true" android:layout_below="@+id/relativeLayout4" android:layout_marginLeft="10dp" android:layout_marginRight="10dp" android:layout_marginTop="3dp" android:background="@drawable/line" android:src="@drawable/line" /> <RelativeLayout android:id="@+id/RelativeLayout02" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentRight="true" android:layout_below="@+id/imageView2" android:layout_marginTop="10dp" > <TextView android:id="@+id/txt_steuer_desc" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:text="Steuer" android:textSize="18dip" /> <TextView android:id="@+id/TextView07" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_centerVertical="true" android:layout_marginRight="10dp" android:text=".-" android:textSize="18dip" /> <TextView android:id="@+id/txt_steuerbetrag" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_toLeftOf="@+id/TextView07" android:text="0.00" android:textSize="18dip" /> </RelativeLayout> <ImageView android:id="@+id/ImageView01" android:layout_width="wrap_content" android:layout_height="1dp" android:layout_alignParentLeft="true" android:layout_below="@+id/RelativeLayout02" android:layout_marginLeft="10dp" android:layout_marginRight="10dp" android:layout_marginTop="3dp" android:background="@drawable/line" android:src="@drawable/line" /> <RelativeLayout android:id="@+id/RelativeLayout03" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentRight="true" android:layout_below="@+id/ImageView01" android:layout_marginTop="10dp" > <TextView android:id="@+id/txt_bruttodesc" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:text="Brutto" android:textSize="18dip" android:textStyle="bold" /> <TextView android:id="@+id/TextView10" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_centerVertical="true" android:layout_marginRight="10dp" android:text=".-" android:textSize="18dip" android:textStyle="bold" /> <TextView android:id="@+id/txt_bruttobetrag" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_toLeftOf="@+id/TextView10" android:text="0.00" android:textSize="18dip" android:textStyle="bold" /> </RelativeLayout> <ImageView android:id="@+id/ImageView02" android:layout_width="wrap_content" android:layout_height="1dp" android:layout_alignParentLeft="true" android:layout_below="@+id/RelativeLayout03" android:layout_marginLeft="10dp" android:layout_marginRight="10dp" android:layout_marginTop="3dp" android:background="@drawable/line" android:src="@drawable/line" /> <ImageView android:id="@+id/ImageView04" android:layout_width="wrap_content" android:layout_height="1dp" android:layout_below="@+id/ImageView02" android:layout_marginLeft="10dp" android:layout_marginRight="10dp" android:layout_marginTop="1dp" android:background="@drawable/line" android:src="@drawable/line" /> </RelativeLayout> <RelativeLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@+id/relativeLayout5" android:layout_alignParentLeft="true" > <ImageView android:id="@+id/ImageView03" android:layout_width="wrap_content" android:layout_height="1dp" android:layout_alignParentBottom="true" android:background="@drawable/line" android:src="@drawable/line" /> <TextView android:id="@+id/company" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_centerVertical="true" android:layout_marginLeft="10dp" android:text="Eingabe:" android:textAppearance="?android:attr/textAppearanceLarge" /> <TextView android:id="@+id/TextView03" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_centerVertical="true" android:layout_marginRight="10dp" android:gravity="right" android:text=".-" android:textAppearance="?android:attr/textAppearanceMedium" /> <TextView android:id="@+id/edit_betrag" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignTop="@+id/company" android:layout_centerVertical="true" android:layout_toLeftOf="@+id/TextView03" android:gravity="right" android:text="-" android:textAppearance="?android:attr/textAppearanceMedium" /> </RelativeLayout> </RelativeLayout> <RelativeLayout android:id="@+id/rl_steuern" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/rl_betraege" android:layout_alignRight="@+id/rl_betraege" android:layout_below="@+id/rl_betraege" android:layout_marginLeft="10dp" android:layout_marginRight="10dp" android:layout_marginTop="5dp" > <Spinner android:id="@+id/spinner_steuer" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_toRightOf="@+id/TextView01" /> <TextView android:id="@+id/TextView01" android:layout_width="70dp" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_centerVertical="true" android:text="Steuer:" android:textSize="18dip" /> </RelativeLayout> <RelativeLayout android:id="@+id/rl_eingabeart" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/rl_steuern" android:layout_alignRight="@+id/rl_steuern" android:layout_below="@+id/rl_steuern" > <TextView android:id="@+id/TextView02" android:layout_width="70dp" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_centerVertical="true" android:text="Eingabe:" android:textSize="18dip" /> <RadioGroup android:id="@+id/radiogrp_netbrut" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_toRightOf="@+id/TextView02" android:orientation="horizontal" > <RadioButton android:id="@+id/radiobutton_netto" android:layout_width="wrap_content" android:layout_height="wrap_content" android:checked="true" android:text="@string/netto_calc_" android:textSize="18dip" /> <RadioButton android:id="@+id/radiobutton_brutto" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/brutto_calc_" android:textSize="18dip" /> </RadioGroup> </RelativeLayout> <RelativeLayout android:id="@+id/rl_parent_changesite" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentRight="true" android:layout_below="@+id/rl_eingabeart" android:layout_marginBottom="10dp" android:layout_marginLeft="10dp" android:layout_marginRight="10dp" > <RelativeLayout android:id="@+id/rl_changesite" android:layout_width="wrap_content" android:layout_height="wrap_content" > <Button android:id="@+id/cmd_1" android:layout_width="55dp" android:layout_height="55dp" android:layout_alignBaseline="@+id/cmd_2" android:layout_alignBottom="@+id/cmd_2" android:layout_marginRight="2dp" android:layout_marginTop="2dp" android:layout_toLeftOf="@+id/cmd_2" android:background="@drawable/zahlen" android:text="1" android:textSize="25dp" /> <Button android:id="@+id/cmd_4" android:layout_width="55dp" android:layout_height="55dp" android:layout_above="@+id/cmd_2" android:layout_marginRight="2dp" android:layout_marginTop="2dp" android:layout_toLeftOf="@+id/cmd_2" android:background="@drawable/zahlen" android:text="4" android:textSize="25dp" /> <Button android:id="@+id/cmd_8" android:layout_width="55dp" android:layout_height="55dp" android:layout_alignBaseline="@+id/cmd_7" android:layout_alignBottom="@+id/cmd_7" android:layout_toLeftOf="@+id/cmd_6" android:background="@drawable/zahlen" android:text="8" android:layout_marginRight="2dp" android:layout_marginTop="2dp" android:textSize="25dp" /> <Button android:id="@+id/cmd_0" android:layout_width="55dp" android:layout_height="55dp" android:layout_alignParentBottom="true" android:layout_alignParentLeft="true" android:layout_marginRight="2dp" android:layout_marginTop="2dp" android:background="@drawable/zahlen" android:text="0" android:textSize="25dp" /> <Button android:id="@+id/cmd_7" android:layout_width="55dp" android:layout_height="55dp" android:layout_above="@+id/cmd_4" android:layout_toLeftOf="@+id/cmd_2" android:background="@drawable/zahlen" android:text="7" android:layout_marginRight="2dp" android:layout_marginTop="2dp" android:textSize="25dp" /> <Button android:id="@+id/cmd_5" android:layout_width="55dp" android:layout_height="55dp" android:layout_above="@+id/cmd_2" android:layout_alignLeft="@+id/cmd_2" android:layout_marginRight="2dp" android:layout_marginTop="2dp" android:background="@drawable/zahlen" android:text="5" android:textSize="25dp" /> <Button android:id="@+id/cmd_point" android:layout_width="55dp" android:layout_height="55dp" android:layout_alignLeft="@+id/cmd_2" android:layout_alignParentBottom="true" android:layout_marginRight="2dp" android:layout_marginTop="2dp" android:background="@drawable/zahlen" android:text="." android:textSize="25dp" /> <Button android:id="@+id/cmd_back_betrag" android:layout_width="55dp" android:layout_height="55dp" android:layout_alignParentBottom="true" android:layout_marginRight="2dp" android:layout_marginTop="2dp" android:layout_toRightOf="@+id/cmd_point" android:background="@drawable/zahlen" android:text="<-" android:textSize="25dp" /> <Button android:id="@+id/cmd_clear" android:layout_width="55dp" android:layout_height="55dp" android:layout_alignParentBottom="true" android:layout_marginTop="2dp" android:layout_toRightOf="@+id/cmd_back_betrag" android:background="@drawable/zahlen" android:text="C" android:textSize="25dp" android:textStyle="bold" /> <Button android:id="@+id/cmd_percent" android:layout_width="55dp" android:layout_height="55dp" android:layout_above="@+id/cmd_back_betrag" android:layout_marginTop="2dp" android:layout_toRightOf="@+id/cmd_back_betrag" android:background="@drawable/zahlen" android:text="%" android:textSize="25dp" android:textStyle="bold" /> <Button android:id="@+id/cmd_3" android:layout_width="55dp" android:layout_height="55dp" android:layout_above="@+id/cmd_back_betrag" android:layout_marginRight="2dp" android:layout_marginTop="2dp" android:layout_toLeftOf="@+id/cmd_clear" android:background="@drawable/zahlen" android:text="3" android:textSize="25dp" /> <Button android:id="@+id/cmd_6" android:layout_width="55dp" android:layout_height="55dp" android:layout_above="@+id/cmd_percent" android:layout_marginRight="2dp" android:layout_marginTop="2dp" android:layout_toLeftOf="@+id/cmd_percent" android:background="@drawable/zahlen" android:text="6" android:textSize="25dp" /> <Button android:id="@+id/cmd_9" android:layout_width="55dp" android:layout_height="55dp" android:layout_above="@+id/cmd_5" android:layout_toRightOf="@+id/cmd_8" android:background="@drawable/zahlen" android:text="9" android:layout_marginRight="2dp" android:layout_marginTop="2dp" android:textSize="25dp" /> <Button android:id="@+id/cmd_changesite" android:layout_width="55dp" android:layout_height="55dp" android:layout_above="@+id/cmd_percent" android:layout_alignLeft="@+id/cmd_percent" android:layout_marginTop="2dp" android:background="@drawable/zahlen" android:text="L" android:textSize="25dp" /> <Button android:id="@+id/cmd_2" android:layout_width="55dp" android:layout_height="55dp" android:layout_above="@+id/cmd_clear" android:layout_marginRight="2dp" android:layout_marginTop="2dp" android:layout_toRightOf="@+id/cmd_0" android:background="@drawable/zahlen" android:text="2" android:textSize="25dp" /> </RelativeLayout> </RelativeLayout> </RelativeLayout> ```

Original source