如何创建一个android的react-native组件

Step 1 - 新建react-native工程 ReactNativeSegmentedAndroid
$ react-native init ReactNativeSegmentedAndroid11

Step 2 - 将新建的工程导入Android studio然后新建空library（以react-native-segmented-android为library的名称）
Step 3 - 新建空library（以react-native-segmented-android为library的名称）
在library目录下的build.gradle中添加react-native的依赖
// file: android/react-native-segmented-android/build.gradle
...

dependencies {
...
compile 'info.hoang8f:android-segmented:1.0.6'
compile 'com.facebook.react:react-native:0.16.+'
}1234567812345678

Step 4 - 创建AndroidSegmented类继承SegmentedGroup
public class AndroidSegmented extends SegmentedGroup{

public void setSegmentOrientation(String str){
if(str.equals("horizontal")){
setOrientation(RadioGroup.HORIZONTAL);
}else if(str.equals("vertical")){
setOrientation(RadioGroup.VERTICAL);
}
}

public AndroidSegmented(ThemedReactContext context) {
super(context);
setGravity(Gravity.CENTER);

setLayoutParams(new ViewGroup.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT
));
}

private final Runnable mLayoutRunnable = new Runnable() {
@Override
public void run() {
measure(MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.EXACTLY),
MeasureSpec.makeMeasureSpec(getHeight(), MeasureSpec.EXACTLY));
layout(getLeft(), getTop(), getRight(), getBottom());
}
};

@Override
public void requestLayout() {
super.requestLayout();
post(mLayoutRunnable);
}

@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
super.onLayout(changed, l, t, r, b);
}

}