Add new API demos for fragment custom animations.

Change-Id: Ia4339d4e4c1617907a9c707e1b8c2309b303e267

samples/ApiDemos/src/com/example/android/apis/app/FragmentCustomAnimations.java

@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * 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
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * 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.example.android.apis.app;
+
+import com.example.android.apis.R;
+
+import android.app.Activity;
+import android.app.Fragment;
+import android.app.FragmentTransaction;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.TextView;
+
+/**
+ * Demonstrates the use of custom animations in a FragmentTransaction when
+ * pushing and popping a stack.
+ */
+public class FragmentCustomAnimations extends Activity {
+    int mStackLevel = 1;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.fragment_stack);
+
+        // Watch for button clicks.
+        Button button = (Button)findViewById(R.id.new_fragment);
+        button.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                addFragmentToStack();
+            }
+        });
+
+        if (savedInstanceState == null) {
+            // Do first time initialization -- add initial fragment.
+            Fragment newFragment = CountingFragment.newInstance(mStackLevel);
+            FragmentTransaction ft = getFragmentManager().beginTransaction();
+            ft.add(R.id.simple_fragment, newFragment).commit();
+        } else {
+            mStackLevel = savedInstanceState.getInt("level");
+        }
+    }
+
+    @Override
+    public void onSaveInstanceState(Bundle outState) {
+        super.onSaveInstanceState(outState);
+        outState.putInt("level", mStackLevel);
+    }
+
+//BEGIN_INCLUDE(add_stack)
+    void addFragmentToStack() {
+        mStackLevel++;
+
+        // Instantiate a new fragment.
+        Fragment newFragment = CountingFragment.newInstance(mStackLevel);
+
+        // Add the fragment to the activity, pushing this transaction
+        // on to the back stack.
+        FragmentTransaction ft = getFragmentManager().beginTransaction();
+        ft.setCustomAnimations(R.animator.fragment_slide_left_enter,
+                R.animator.fragment_slide_left_exit,
+                R.animator.fragment_slide_right_enter,
+                R.animator.fragment_slide_right_exit);
+        ft.replace(R.id.simple_fragment, newFragment);
+        ft.addToBackStack(null);
+        ft.commit();
+    }
+//END_INCLUDE(add_stack)
+
+//BEGIN_INCLUDE(fragment)
+    public static class CountingFragment extends Fragment {
+        int mNum;
+
+        /**
+         * Create a new instance of CountingFragment, providing "num"
+         * as an argument.
+         */
+        static CountingFragment newInstance(int num) {
+            CountingFragment f = new CountingFragment();
+
+            // Supply num input as an argument.
+            Bundle args = new Bundle();
+            args.putInt("num", num);
+            f.setArguments(args);
+
+            return f;
+        }
+
+        /**
+         * When creating, retrieve this instance's number from its arguments.
+         */
+        @Override
+        public void onCreate(Bundle savedInstanceState) {
+            super.onCreate(savedInstanceState);
+            mNum = getArguments() != null ? getArguments().getInt("num") : 1;
+        }
+
+        /**
+         * The Fragment's UI is just a simple text view showing its
+         * instance number.
+         */
+        @Override
+        public View onCreateView(LayoutInflater inflater, ViewGroup container,
+                Bundle savedInstanceState) {
+            View v = inflater.inflate(R.layout.hello_world, container, false);
+            View tv = v.findViewById(R.id.text);
+            ((TextView)tv).setText("Fragment #" + mNum);
+            tv.setBackgroundDrawable(getResources().getDrawable(android.R.drawable.gallery_thumb));
+            return v;
+        }
+    }
+//END_INCLUDE(fragment)
+}

samples/ApiDemos/src/com/example/android/apis/app/_index.html

@@ -101,6 +101,10 @@
   <dd>Demonstrates how to display and respond to a context menu that is
   display from a fragment's view hierarchy.</dd>
   
+  <dt><a href="FragmentCustomAnimation.html">Fragment Custom Animation</a></dt>
+  <dd>Demonstrates the use of a custom animation for pushing and popping fragments
+  on the back stack.</dd>
+
   <dt><a href="FragmentDialog.html">Fragment Dialog</a></dt>
   <dd>Demonstrates use of DialogFragment to show various types of dialogs.</dd>