我这样写图片是黑色的,不知道为什么
<?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:orientation="vertical">
<Button
android:id="@+id/button1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Button" />
<Button
android:id="@+id/button2"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="Button" />
</linearLayout>
