机器人:自定义视图布局包装 [英] android: custom view layout wrapping
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问题描述
我想有两个自定义的看法是这样的:
I want to have two custom views like this:
class LoadingView extends RelativeLayout{
//this view has a progressBar and can show and hide it.
void setIsLoading(){
// shows/hides progress bar
}
// some code ...
}
class OtherView extends LoadingView{
//some code ...
}
LoadingView有一个布局是这样的:
LoadingView has a layout like this:
<RelativeLayout>
<FrameLayout
id="@+id/content">
<!--this is where content goes-->
</FrameLayout>
<ProgressBar
id="@+id/pb"/>
</RelativeLayout>
因此,任何自定义视图,它继承自它会被注入的FrameLayout
因此,如果 OtherView
都有它自己的布局,它会被嵌套在的FrameLayout
自动,您将能够叫 myOtherView.setIsLoading(真/假)
so if OtherView
has it's own layout , it will be nested inside FrameLayout
automatically and you will be able to call myOtherView.setIsLoading(true/false)
建议你将如何做呢?
推荐答案
请引用内容的FrameLayout
充气第一种观点的时候。
Keep a reference to the content FrameLayout
when inflating the first view.
public class LoadingView extends RelativeLayout {
private ProgressBar progressBar;
private FrameLayout contentFrame;
public LoadingView(Context context) {
super(context);
initialize();
}
public LoadingView(Context context, AttributeSet attrs) {
super(context, attrs);
initialize();
}
public LoadingView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initialize();
}
private void initialize() {
View root = inflate(getContext(), R.layout.loading_view, this);
progressBar = (ProgressBar) root.findViewById(R.id.progress_bar);
contentFrame = (FrameLayout) root.findViewById(R.id.content_frame);
}
public void setLoading(boolean loading) {
progressBar.setVisibility(loading ? VISIBLE : GONE);
}
protected FrameLayout getContentFrame() {
return contentFrame;
}
}
然后充气子视图时,使用 getContentFrame
作为父视图。
public class OtherView extends LoadingView {
public OtherView(Context context) {
super(context);
initialize();
}
public OtherView(Context context, AttributeSet attrs) {
super(context, attrs);
initialize();
}
public OtherView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initialize();
}
private void initialize() {
View root = inflate(getContext(), R.layout.other_view, getContentFrame());
}
}
loading_view.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="match_parent"
android:layout_width="match_parent">
<FrameLayout
android:id="@+id/content_frame"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<ProgressBar
android:id="@+id/progress_bar"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</RelativeLayout>
other_view.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:orientation="vertical">
<TextView
android:text="Title"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<TextView
android:text="Subtitle"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
和使用这样
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="match_parent"
android:layout_width="match_parent">
<com.example.client.ui.OtherView
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</FrameLayout>
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