android image切换器 androidimage切换器|Android

Android图像切换器可在图像上提供动画，以从一个图像过渡到另一个图像。为了使用图像切换器，我们需要在.xml文件中实现ImageSwitcher组件。
ImageSwitcher的setFactory（）方法提供ViewFactory接口的实现。 ViewFactory接口实现其未实现的方法并返回ImageView。
图像切换器示例
让我们实现一个图像切换器。
【android image切换器】在布局文件夹中创建activity_main.xml和content_main.xml文件。
将一些图像放在可切换的文件夹中。
activity_main.xml
文件：activity_main.xml

< ?xml version="1.0" encoding="utf-8"?> < android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:fitsSystemWindows="true" tools:context="com.example.test.imageswitcher.MainActivity">< android.support.design.widget.AppBarLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:theme="@style/AppTheme.AppBarOverlay">< android.support.v7.widget.Toolbar android:id="@+id/toolbar" android:layout_width="match_parent" android:layout_height="?attr/actionBarSize" android:background="?attr/colorPrimary" app:popupTheme="@style/AppTheme.PopupOverlay" />< /android.support.design.widget.AppBarLayout> < include layout="@layout/content_main" />< /android.support.design.widget.CoordinatorLayout>

content_main.xml
文件：content_main.xml

< ?xml version="1.0" encoding="utf-8"?> < RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" 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" app:layout_behavior="@string/appbar_scrolling_view_behavior" tools:context="com.example.test.imageswitcher.MainActivity" tools:showIn="@layout/activity_main">< TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Image Switcher Example"android:id="@+id/textView" android:layout_alignParentTop="true" android:layout_centerHorizontal="true" />< ImageSwitcher android:id="@+id/imageSwitcher" android:layout_width="match_parent" android:layout_height="250dp" android:layout_marginBottom="28dp" android:layout_marginTop="40dp" />< Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Next" android:id="@+id/button" android:layout_marginBottom="47dp" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" /> < /RelativeLayout>

活动类
文件：MainActivity.java

package com.example.test.imageswitcher; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.view.View; import android.widget.Button; import android.widget.ImageSwitcher; import android.widget.ImageView; import android.widget.ViewSwitcher; import android.app.ActionBar; import android.view.animation.Animation; import android.view.animation.AnimationUtils; public class MainActivity extends AppCompatActivity { ImageSwitcher imageSwitcher; Button nextButton; int imageSwitcherImages[] = {R.drawable.cpp, R.drawable.c_sarp, R.drawable.jsp, R.drawable.mysql, R.drawable.hadoop}; int switcherImageLength = imageSwitcherImages.length; int counter = -1; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); imageSwitcher = (ImageSwitcher) findViewById(R.id.imageSwitcher); nextButton = (Button) findViewById(R.id.button); imageSwitcher.setFactory(new ViewSwitcher.ViewFactory() { @Override public View makeView() { ImageView switcherImageView = new ImageView(getApplicationContext()); switcherImageView.setLayoutParams(new ImageSwitcher.LayoutParams( ActionBar.LayoutParams.FILL_PARENT, ActionBar.LayoutParams.FILL_PARENT )); switcherImageView.setScaleType(ImageView.ScaleType.FIT_CENTER); switcherImageView.setImageResource(R.drawable.hadoop); //switcherImageView.setMaxHeight(100); return switcherImageView; } }); Animation aniOut = AnimationUtils.loadAnimation(this, android.R.anim.slide_out_right); Animation aniIn = AnimationUtils.loadAnimation(this, android.R.anim.slide_in_left); imageSwitcher.setOutAnimation(aniOut); imageSwitcher.setInAnimation(aniIn); nextButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { counter++; if (counter == switcherImageLength){ counter = 0; imageSwitcher.setImageResource(imageSwitcherImages[counter]); } else{ imageSwitcher.setImageResource(imageSwitcherImages[counter]); } } }); }}

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