Android

LinearLayout에 그라데이션 배경을 적용하는 데 문제가 있습니다.

이것은 내가 읽은 것에서 비교적 간단해야하지만 작동하지 않는 것 같습니다. 참고로 2.1-update1에서 개발 중입니다.

header_bg.xml :

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <gradient
        android:angle="90"
        android:startColor="#FFFF0000"
        android:endColor="#FF00FF00"
        android:type="linear"/>
</shape>

main_header.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="50dip"
    android:orientation="horizontal"
    android:background="@drawable/header_bg">
</LinearLayout>

@ drawable / header_bg를 색상으로 변경하면 (예 : # FF0000) 완벽하게 작동합니다. 여기에 명백한 것이 빠져 있습니까?

답변

<?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="50dip"
    android:orientation="horizontal"
    android:background="@drawable/main_header_selector">
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item>
    <shape>
        <gradient
            android:angle="90"
            android:startColor="#FFFF0000"
            android:endColor="#FF00FF00"
            android:type="linear" />
    </shape>
</item>
</selector>

<shape
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <gradient
        android:startColor="#000000"
        android:centerColor="#5b5b5b"
        android:endColor="#000000"
        android:angle="0" />
</shape>

android:background="@drawable/gradient"

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape>
            <gradient android:angle="90"
                android:endColor="#9b0493"
                android:startColor="#38068f"
                android:type="linear" />
        </shape>
    </item>
</selector>

  <?xml version="1.0" encoding="utf-8"?>
    <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@drawable/gradient_background"
        android:orientation="vertical"
        android:padding="20dp">
        .....

</LinearLayout>

<shape
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle"
>
    <gradient
        android:startColor="@color/purple"
        android:endColor="@color/pink"
        android:angle="270" />
</shape>

                  val gradientDrawable = GradientDrawable(
                        GradientDrawable.Orientation.TOP_BOTTOM,
                        intArrayOf(Color.parseColor("#008000"),
                                   Color.parseColor("#ADFF2F"))
                    );
                    gradientDrawable.cornerRadius = 0f;

                   //Set Gradient
                   linearLayout.setBackground(gradientDrawable);

<ImageView
    android:id="@+id/imgToast"
    android:layout_width="wrap_content"
    android:layout_height="60dp"
    android:src="@drawable/toast_bg"
    android:adjustViewBounds="true"
    android:scaleType="fitXY"/>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:id="@+id/custom_toast_layout_id"
    android:layout_height="match_parent"
    android:background="@drawable/toast_bg">