Fragment加入页面切换动画——FragmentCustomAnimationSupport

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public class FragmentCustomAnimationSupport extends FragmentActivity {    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 = getSupportFragmentManager().beginTransaction();            ft.add(R.id.simple_fragment, newFragment).commit();        } else {            mStackLevel = savedInstanceState.getInt("level");        }    }    //当页面销毁时存储状态字段    @Override    public void onSaveInstanceState(Bundle outState) {        super.onSaveInstanceState(outState);        outState.putInt("level", mStackLevel);    }    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 = getSupportFragmentManager().beginTransaction();        //添加了fragment之前切换动画        ft.setCustomAnimations(R.anim.fragment_slide_left_enter,                R.anim.fragment_slide_left_exit,                R.anim.fragment_slide_right_enter,                R.anim.fragment_slide_right_exit);        ft.replace(R.id.simple_fragment, newFragment);        ft.addToBackStack(null);        ft.commit();    }    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;        }    }}

</pre><pre code_snippet_id="1618044" snippet_file_name="blog_20160321_3_4316788" name="code" class="java">xml:

<pre name="code" class="html"><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:gravity="center_horizontal"    android:orientation="vertical"    android:padding="4dip">    <FrameLayout        android:id="@+id/simple_fragment"        android:layout_width="match_parent"        android:layout_height="0px"        android:layout_weight="1"></FrameLayout>    <LinearLayout        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_weight="0"        android:orientation="horizontal">        <Button            android:id="@+id/home"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="@string/home">            <requestFocus />        </Button>        <Button            android:id="@+id/new_fragment"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="@string/new_fragment"></Button>        <Button            android:id="@+id/delete_fragment"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="@string/delete_fragment"></Button>    </LinearLayout></LinearLayout>

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