Android 从代码更改活动背景
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Change activity background from code
提问by xander27
I have an activity with a background:
我有一个有背景的活动：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:minWidth="25px"
android:minHeight="25px"
android:background="@drawable/background_fingerboard" />
How can I change background image from code? I actually use mono, but Java samples will also be helpful.
如何从代码更改背景图像？我实际上使用单声道，但 Java 示例也会有所帮助。
回答by ρяσ?ρ?я K
first add LinearLayout id as in your layout xml:
首先在您的布局 xml 中添加 LinearLayout id：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="@+id/linearLayoutid"
android:minWidth="25px"
android:minHeight="25px"
android:background="@drawable/background_fingerboard"
and in code part set background as::
并在代码部分将背景设置为：
LinearLayout linearLayout = (LinearLayout) findViewById(R.id.linearLayoutid);
linearLayout.setBackgroundResource(R.drawable.background_fingerboard);
回答by Vipul Shah
In java we do like this
在java中我们这样做
Give id to LinearLayout
将 id 赋予 LinearLayout
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id=@+id/parentLayout
Then in code
然后在代码中
LinearLayout layout=(LinearLayout)findViewById(R.id.parentLayout);
layout.setBackgroundColor(Color.BLUE); Or
layout.setBackgroundDrawable(d); Or
layout.setBackgroundResource(resid);
回答by Dheeresh Singh
LinearLayout vi = (LinearLayout ) findViewById(<id>)
vi.setBackgroundResource(R.drawable.<id2>);
you need to provide the id to your LinearLayout in XML as well....
您还需要在 XML 中为您的 LinearLayout 提供 id....
