Android relative layout align parent right

问题

I have following layout:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/test_ll"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/background"
android:orientation="vertical" >

<RelativeLayout
    android:id="@+id/main_layPanelCircle"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center_vertical|center_horizontal"
    android:layout_marginLeft="10dp"
    android:layout_marginRight="10dp"
    android:layout_marginTop="15dp"
    android:background="@drawable/main_panel_a"
    android:orientation="vertical"
    android:padding="10dp" >

    <ImageView
        android:id="@+id/main_imgBreachAlert"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginRight="5dp" />

    <Button
        android:id="@+id/main_btnMap"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:background="@null"
        android:drawableTop="@drawable/icon_find"
        android:text="@string/main_locate"
        android:textColor="@android:color/white"
        android:textSize="10sp" />

    <LinearLayout
        android:id="@+id/main_llPanelCycleMiddle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/main_btnMap"
        android:layout_centerInParent="true"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/main_btnLeft"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@null"
            android:drawableTop="@drawable/icon_call"
            android:text="@string/main_call"
            android:textColor="@android:color/white"
            android:textSize="10sp"
            android:visibility="visible" />

        <Button
            android:id="@+id/main_btnEmergency"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@null"
            android:drawableTop="@drawable/icon_emergency"
            android:scaleType="center"
            android:text="@string/main_emergency"
            android:textColor="@android:color/white"
            android:textSize="9sp"
            android:textStyle="bold" />

        <Button
            android:id="@+id/main_btnRight"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:background="@null"
            android:drawableTop="@drawable/icon_store"
            android:text="@string/main_store"
            android:textColor="@android:color/white"
            android:textSize="10sp" />
    </LinearLayout>

    <Button
        android:id="@+id/main_btnMore"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/main_llPanelCycleMiddle"
        android:layout_centerHorizontal="true"
        android:background="@null"
        android:drawableTop="@drawable/icon_more"
        android:text="@string/main_more"
        android:textColor="@android:color/white"
        android:textSize="10sp" />
</RelativeLayout>

</LinearLayout>

When i set main_imgBreachAlert android:layout_alignParentLeft="true" eveerything is OK (left image) but when i set it to right mine relative layout stretches (left image):

http://i.imgur.com/uDJqF0k.jpg?1

Could you please advise how could I fix this problem.

Thnx

回答1:

Try android:layout_centerInParent="true" and remove the alignParentLeft attribute if you want the image centered in your layout.

If you only want to align it to the right, just use android:layout_alignParentRight="true".

<ImageView
    android:id="@+id/main_imgBreachAlert"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentRight="true"
    android:layout_marginRight="5dp" />

来源：https://stackoverflow.com/questions/17446229/android-relative-layout-align-parent-right