Update

app/src/main/java/com/hippo/effect/ViewTransition.java

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+/*
+ * Copyright (C) 2015 Hippo Seven
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.hippo.effect;
+
+import android.animation.Animator;
+import android.animation.ObjectAnimator;
+import android.os.Build;
+import android.support.annotation.NonNull;
+import android.view.View;
+
+import com.hippo.animation.SimpleAnimatorListener;
+import com.hippo.util.ViewUtils;
+
+public class ViewTransition {
+
+    private static long ANIMATE_TIME = 300L;
+
+    private View mView1;
+    private View mView2;
+    private boolean mSwitch = false;
+
+    public ViewTransition(@NonNull View view1, @NonNull View view2) {
+        mView1 = view1;
+        mView2 = view2;
+
+        ViewUtils.setVisibility(view1, View.VISIBLE);
+        ViewUtils.setVisibility(view2, View.GONE);
+    }
+
+    public void toggle() {
+        if (mSwitch) {
+            showFirstView();
+        } else {
+            showSecondView();
+        }
+    }
+
+    public void showFirstView() {
+        if (mSwitch) {
+            mSwitch = false;
+
+            ObjectAnimator oa1 = ObjectAnimator.ofFloat(mView1, "alpha", 0f, 1f);
+            oa1.setDuration(ANIMATE_TIME);
+            oa1.addListener(new SimpleAnimatorListener() {
+                @Override
+                public void onAnimationStart(Animator animation) {
+                    ViewUtils.setVisibility(mView1, View.VISIBLE);
+                }
+            });
+            ObjectAnimator oa2 = ObjectAnimator.ofFloat(mView2, "alpha", 1f, 0f);
+            oa2.setDuration(ANIMATE_TIME);
+            oa2.addListener(new SimpleAnimatorListener() {
+                @Override
+                public void onAnimationEnd(Animator animation) {
+                    ViewUtils.setVisibility(mView2, View.GONE);
+                }
+            });
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
+                oa1.setAutoCancel(true);
+                oa2.setAutoCancel(true);
+            }
+            oa1.start();
+            oa2.start();
+        }
+    }
+
+    public void showSecondView() {
+        if (!mSwitch) {
+            mSwitch = true;
+
+            ObjectAnimator oa1 = ObjectAnimator.ofFloat(mView1, "alpha", 1f, 0f);
+            oa1.setDuration(ANIMATE_TIME);
+            oa1.addListener(new SimpleAnimatorListener() {
+                @Override
+                public void onAnimationEnd(Animator animation) {
+                    ViewUtils.setVisibility(mView1, View.GONE);
+                }
+            });
+            ObjectAnimator oa2 = ObjectAnimator.ofFloat(mView2, "alpha", 0f, 1f);
+            oa2.setDuration(ANIMATE_TIME);
+            oa2.addListener(new SimpleAnimatorListener() {
+                @Override
+                public void onAnimationStart(Animator animation) {
+                    ViewUtils.setVisibility(mView2, View.VISIBLE);
+                }
+            });
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR2) {
+                oa1.setAutoCancel(true);
+                oa2.setAutoCancel(true);
+            }
+            oa1.start();
+            oa2.start();
+        }
+    }
+}