《使用ImageSwitcher实现如下效果》

最新推荐文章于 2016-12-08 19:19:24 发布

原创最新推荐文章于 2016-12-08 19:19:24 发布 · 465 阅读

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本文探讨了Android应用开发中的关键技术和图像处理方法，包括布局设计、图像切换功能实现及OpenGL ES应用。

?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" 
    android:background="#000099">

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >

        <ImageSwitcher
            android:id="@+id/is_imageswitch"
            android:layout_width="wrap_content"
            android:layout_height="fill_parent"
            >
        </ImageSwitcher>
    </LinearLayout>

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" >

        <Button
            android:id="@+id/btn_last"
            android:layout_width="150px"
            android:layout_height="wrap_content"
            android:onClick="onClickLast"
            android:text="上一张" >
        </Button>

        <Button
            android:id="@+id/btn_next"
            android:layout_width="150px"
            android:layout_height="wrap_content"
            android:onClick="onClickNext"
            android:text="下一张" >
        </Button>
    </LinearLayout>

</LinearLayout>

package com.example.test5;import android.os.Bundle;import android.app.Activity;import android.content.Context;import android.view.Menu;import android.view.View;import android.widget.Button;import android.widget.ImageSwitcher;import android.widget.ImageView;import android.widget.ViewSwitcher.ViewFactory;public class MainActivity extends Activity {private ImageSwitcher is_imageSwitcher;//存放图片id的int数组 private int[] images={ R.drawable.pic1, R.drawable.pic2, R.drawable.pic3, R.drawable.pic4, R.drawable.pic5, R.drawable.pic6, }; private Button btn_next; private Button btn_last; private int index=0;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);is_imageSwitcher=(ImageSwitcher)findViewById(R.id.is_imageswitch); btn_last=(Button)findViewById(R.id.btn_last); btn_next=(Button)findViewById(R.id.btn_next); is_imageSwitcher.setFactory(new ImageViewFactory(this)); is_imageSwitcher.setBackgroundResource(images[index]);} class ImageViewFactory implements ViewFactory { private Context context; public ImageViewFactory(Context context) { this.context = context; } public View makeView() { // TODO Auto-generated method stub //定义每个图像的显示大小 ImageView iv = new ImageView(this.context); iv.setLayoutParams(new ImageSwitcher.LayoutParams(300, 300)); return iv; } } public void onClickLast(View v) { if(index>=0&&index<images.length-1) { index++; is_imageSwitcher.setBackgroundResource(images[index]); }else { index=images.length-1; } } public void onClickNext(View v) { if(index>0&&index<images.length) { index--; is_imageSwitcher.setBackgroundResource(images[index]); }else { index=images.length-1; } }@Overridepublic 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;}}