ViewFlipper的功能和用法

ViewFlipper组件继承了ViewAnimator,它可以调用addView(View v)添加多个组件向ViewFlipper中添加多个组件之后，ViewFlipper可使用动画控制多个组件之间的切换效果 ViewAnimator是一个基类，它继承的是FrameLayout，因此可以将多个View组件“叠加”在一起，ViewAnimator额外增加的功能就是可以在View切换时表现出动画效果。  ViewFlipper继承了ViewAnimation，额外增加的新功能如下：  eg.自动播放的图片库 acitivity_main.xml ~~~ <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.example.viewflippertest.MainActivity" > <!-- ViewFlipper组件，放了三个ImageView组件--> <ViewFlipper android:id="@+id/viewFlipper1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_alignParentTop="true" android:layout_marginLeft="80dp" android:layout_marginTop="34dp" android:flipInterval="1000" > <ImageView android:id="@+id/imageView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/bomb10" /> <ImageView android:id="@+id/imageView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/bomb11" /> <ImageView android:id="@+id/imageView3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/bomb12" /> </ViewFlipper> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_centerVertical="true" android:layout_marginLeft="32dp" android:onClick="prev" android:text="<" /> <Button android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerVertical="true" android:layout_toRightOf="@+id/button1" android:onClick="auto" android:text="Auto" /> <Button android:id="@+id/button3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBaseline="@+id/button2" android:layout_alignBottom="@+id/button2" android:layout_toRightOf="@+id/button2" android:onClick="next" android:text=">" /> </RelativeLayout> ~~~ MainActvity.java ~~~ package com.example.viewflippertest; import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.ViewFlipper; public class MainActivity extends Activity { ViewFlipper cf;//ViewFlipper对象 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); cf=(ViewFlipper) findViewById(R.id.viewFlipper1); } //响应按钮函数 public void prev(View v){ cf.setInAnimation(this,R.anim.slide_in_right); cf.setOutAnimation(this,R.anim.slide_out_left); cf.showPrevious(); //停止切换 cf.stopFlipping(); }; //响应按钮函数 public void auto(View v){ cf.setInAnimation(this,R.anim.slide_in_right); cf.setOutAnimation(this,R.anim.slide_out_left); cf.startFlipping(); }; //响应按钮函数 public void next(View v){ cf.setInAnimation(this,R.anim.slide_in_left); cf.setOutAnimation(this,R.anim.slide_out_right); cf.showNext(); //停止切换 cf.stopFlipping(); }; @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. int id = item.getItemId(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } } ~~~ slide_in_left.xml ~~~ <?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android"> <!-- 设置从左边拖进来的动画 android:duration指定动画持续时间 --> <translate android:fromXDelta="-100%p" android:toXDelta="0" android:duration="@android:integer/config_mediumAnimTime" /> </set> ~~~ slide_in_right.xml ~~~ <?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android"> <!-- 设置从右边拖进来的动画 android:duration指定动画持续时间 --> <translate android:fromXDelta="100%p" android:toXDelta="0" android:duration="@android:integer/config_mediumAnimTime" /> </set> ~~~ slide_out_left.xml ~~~ <?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android"> <!-- 设置从左边拖出去的动画 android:duration指定动画持续时间 --> <translate android:fromXDelta="0" android:toXDelta="-100%p" android:duration="@android:integer/config_mediumAnimTime" /> </set> ~~~ slide_out_right.xml ~~~ <?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android"> <!-- 设置从左边拖出去的动画 android:duration指定动画持续时间 --> <translate android:fromXDelta="0" android:toXDelta="100%p" android:duration="@android:integer/config_mediumAnimTime" /> </set> ~~~