Add: floating window, layout inspector

app/src/main/java/com/stardust/widget/ViewSwitcher.java

@@ -0,0 +1,63 @@
+package com.stardust.widget;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+
+/**
+ * Created by Stardust on 2017/3/11.
+ */
+
+public class ViewSwitcher extends android.widget.ViewSwitcher {
+
+    private View mCurrentView;
+
+    public ViewSwitcher(Context context) {
+        super(context);
+    }
+
+    public ViewSwitcher(Context context, View first, View second) {
+        super(context);
+        addView(first);
+        addView(second);
+    }
+
+    public ViewSwitcher(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public View getCurrentView() {
+        return mCurrentView;
+    }
+
+    public int getCurrentViewIndex() {
+        return mCurrentView == getChildAt(0) ? 0 : 1;
+    }
+
+    public void showFirst() {
+        ensureCurrentView();
+        if (mCurrentView != getChildAt(0)) {
+            showPrevious();
+            mCurrentView = getChildAt(0);
+        }
+    }
+
+    private void ensureCurrentView() {
+        if (mCurrentView == null) {
+            mCurrentView = getChildAt(0);
+        }
+    }
+
+    public void showSecond() {
+        ensureCurrentView();
+        if (mCurrentView != getChildAt(1)) {
+            showNext();
+            mCurrentView = getChildAt(1);
+        }
+    }
+
+    public void setSecondView(View v) {
+        removeViewAt(1);
+        addView(v);
+    }
+}