我正在尝试使用背景制作布局,并在此布局的底部添加滚动视图。
这是我的代码:
FrameLayout mainLayout = new FrameLayout(getApplicationContext());
mainLayout.setLayoutParams(new ViewGroup.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
mainLayout.setBackgroundResource(R.drawable.background2);
FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(LayoutParams.FILL_PARENT, 200);
params.gravity = Gravity.BOTTOM|Gravity.CENTER;
final ScrollView scrollView = new ScrollView(getApplicationContext());
scrollView.setLayoutParams(params);
scrollView.setBackgroundColor(Color.TRANSPARENT);
StorageView storageView = new StorageView(getApplicationContext());
storageView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
Drawable drawable = getResources().getDrawable(R.drawable.background1);
drawable.setAlpha(0);
storageView.setBackgroundDrawable(drawable);
scrollView.addView(storageView);
mainLayout.addView(scrollView);
setContentView(mainLayout);
为什么我只看到背景图片?
*编辑:
如果删除所有setBackgroundColor并将setBackgroundDrawable移动到ScrollLayout或StorageView,我会在整个屏幕上看到背景
* EDIT2:
我编辑代码:删除不必要的布局,并设置背景可绘制,alpha设置为0,现在它可以工作。
好吧,如果有人向我解释为什么我需要这样做,我会很高兴的?答案 0 :(得分:2)
试试这个:
findViewById(R.id.v).setBackgroundColor(getResources().getColor(android.R.color.transparent));
答案 1 :(得分:1)
<?xml version="1.0" encoding="utf-8"?>
<resources>
<style name="Theme.Transparent" parent="android:Theme">
<item name="android:windowIsTranslucent">true</item>
<item name="android:windowBackground">@android:color/transparent</item>
<item name="android:windowContentOverlay">@null</item>
<item name="android:windowNoTitle">true</item>
<item name="android:windowIsFloating">true</item>
<item name="android:backgroundDimEnabled">false</item>
</style>
</resources>
然后在清单
中<activity android:name=".SampleActivity" android:theme="@style/Theme.Transparent">
...
</activity>
答案 2 :(得分:0)
添加以下属性
android:background="@android:color/transparent"