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FragmentCustomAnimation实现Fragment的界面切换
1.知识点:FragmentCustomAnimation
2.示例:来自于官网示例的简化,这样更方便于学习该知识点。
本示例的源码下载地址为:http://download.csdn.net/detail/far_sight/7932287
3.项目FragmentCustomAnimationTest1效果:重复点按钮new fragment,第点一次,数字加一,实现原因是第点一次加了一个新的Fragment在栈中。 当点返回键时,数字会减少,原因是Fragment在出栈。当最后一个出栈后再点返回键,程序退出。
两个在layout中的xml文件fragment_stack.xml与hello_world.xml
fragment_stack.xml文件内容为:
<?xml version="1.0" encoding="utf-8"?><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" > <LinearLayout android:id="@+id/simple_fragment" android:layout_width="match_parent" android:layout_height="0px" android:layout_weight="1" android:background="#ffff0000" > </LinearLayout> <Button android:id="@+id/new_fragment" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="0" android:text="new fragment" > <requestFocus /> </Button></LinearLayout>
hello_world.xml文件的内容为:
<?xml version="1.0" encoding="utf-8"?><TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/text" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center_vertical|center_horizontal" android:text="" android:textSize="40sp" />
类FragmentCustomAnimations的内容为:
package com.fs.act;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;public class FragmentCustomAnimations extends Activity { private int mStackLevel = 100; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.fragment_stack); Button button = (Button) findViewById(R.id.new_fragment); button.setOnClickListener(new OnClickListener() { public void onClick(View v) { addFragmentToStack(); } }); } void addFragmentToStack() { Fragment newFragment = CountingFragment.newInstance(++mStackLevel); FragmentTransaction ft = getFragmentManager().beginTransaction(); ft.replace(R.id.simple_fragment, newFragment); ft.addToBackStack(null); ft.commit(); } public static class CountingFragment extends Fragment { static CountingFragment newInstance(int num) { CountingFragment f = new CountingFragment(); Bundle args = new Bundle(); args.putInt("num", num); f.setArguments(args); return f; } @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 #"+ this.getArguments().getInt("num")); return v; } }}<img src=http://www.mamicode.com/"http://img.blog.csdn.net/20140917172541900?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvd2FuZ2d1YW5ncm9uZw==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />
4.项目FragmentCustomAnimationTest2加了界面切换时滑动效果。下官是在栈中加Fragment还是按返回键让Fragment从栈中出栈,都有滑动效果。其它与项目
FragmentCustomAnimationTest1相同。
(1) 在上一项目基础上在res下面增加文件夹animator,里面加下四个文件
fragment_slide_left_enter.xml
fragment_slide_left_exit.xml
fragment_slide_right_enter.xml
fragment_slide_right_exit.xml
(2)FragmentCustomAnimations.java的内容改为
package com.fs.act;import android.annotation.SuppressLint;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;public class FragmentCustomAnimations extends Activity { private int mStackLevel = 100; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.fragment_stack); Button button = (Button) findViewById(R.id.new_fragment); button.setOnClickListener(new OnClickListener() { public void onClick(View v) { addFragmentToStack(); } }); } @SuppressLint("NewApi") void addFragmentToStack() { Fragment newFragment = CountingFragment.newInstance(++mStackLevel); 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(); } public static class CountingFragment extends Fragment { static CountingFragment newInstance(int num) { CountingFragment f = new CountingFragment(); Bundle args = new Bundle(); args.putInt("num", num); f.setArguments(args); return f; } @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 #" + this.getArguments().getInt("num")); return v; } }}
完
FragmentCustomAnimation实现Fragment的界面切换