我有一个应用程序,我从xml中设置了背景图片。我通过调用以下命令获取视图:
setContentView(R.)
在运行时,如何根据条件在此背景上放置半透明的覆盖层。我想要一个红色的覆盖层,其alpha值设置为50%。
我尝试创建一个单独的XML文件,其中视图被复制并带有不同的图像/覆盖层,但这很混乱,因为当我使用新视图时,我必须充气所有按钮/文本视图。
谢谢Matt。
[编辑1]
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<LinearLayout android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/carefreebgscaledlighting"
android:orientation="vertical" xmlns:android="http://schemas.android.com/apk/res/android">
<TextView
android:id="@+id/textviewcompanyname"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#003F87" />
<TextView
android:id="@+id/textViewYouAreSignedIn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_alignParentTop="true"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#003F87"
/>
<TextView
android:id="@+id/textViewUnsentTransactions"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_below="@id/textViewYouAreSignedIn"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#003F87"
/>
[edit2]
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<RelativeLayout
android:id="@+id/transparentOverlay"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@color/red_transparent" >
<LinearLayout android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/carefreebgscaledlighting"
android:orientation="vertical" xmlns:android="http://schemas.android.com/apk/res/android">
<TextView
android:id="@+id/textviewcompanyname"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#003F87" />
<TextView
android:id="@+id/textViewYouAreSignedIn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_alignParentTop="true"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#003F87"
/>
[edit3]
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<LinearLayout
android:id="@+id/ll1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/carefreebgscaledlighting"
android:orientation="vertical" xmlns:android="http://schemas.android.com/apk/res/android">
<TextView
android:id="@+id/textviewcompanyname"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#003F87" />
.
if(status.equalsIgnoreCase(IN)){
youAreSignedInAt.setText("You are signed in at " + name);
LinearLayout layout =(LinearLayout)findViewById(R.id.ll1);
layout.setBackgroundResource(R.drawable.carefreebgscaledlightingred);
}else{
youAreSignedInAt.setText("You are not signed in");
LinearLayout layout =(LinearLayout)findViewById(R.id.ll1);
layout.setBackgroundResource(R.drawable.carefreebgscaledlighting);
}