Android ImageSwitcher 图片切换 按钮点击切换
Android ImageSwitcher 图片切换 按钮点击切换
图片显示:
1. MainActivity
- package com.gamedog.test;
- import Android.app.Activity;
- import android.os.Bundle;
- 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 implements ViewFactory
- {
- private ImageSwitcher switcher;
- private Button forward;
- private Button next;
- // 图片索引
- private static int index = 0;
- // 显示的图片资源
- private static final Integer[] imagelist =
- { R.drawable.img1, R.drawable.img2, R.drawable.img3, R.drawable.img4, R.drawable.img5, R.drawable.img6 };
- @Override
- public void onCreate(Bundle savedInstanceState)
- {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- forward = (Button) findViewById(R.id.forward);
- next = (Button) findViewById(R.id.next);
- switcher = (ImageSwitcher) findViewById(R.id.image);
- switcher.setFactory(this);
- switcher.setImageResource(imagelist[index]);
- // 上一张
- forward.setOnClickListener(new View.OnClickListener()
- {
- @Override
- public void onClick(View view)
- {
- index--;
- if (index < 0)
- {
- index = imagelist.length - 1;
- }
- switcher.setImageResource(imagelist[index]);
- }
- });
- // 下一张
- next.setOnClickListener(new View.OnClickListener()
- {
- @Override
- public void onClick(View view)
- {
- index++;
- if (index >= imagelist.length)
- {
- index = 0;
- }
- switcher.setImageResource(imagelist[index]);
- }
- });
- }
- // 用于显示图片
- @Override
- public View makeView()
- {
- return new ImageView(this);
- }
- }
2.布局文件
- <?xml version="1.0" encoding="utf-8"?>
- <ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
- android:orientation="vertical"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent">
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:orientation="horizontal"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- android:gravity="center"
- android:background="#f0f0f0"
- >
- <Button
- android:id="@+id/forward"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:background="@drawable/left_btn"
- android:layout_gravity="center"
- />
- <ImageSwitcher
- android:id="@+id/image"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:layout_marginLeft="20dp"
- android:layout_marginRight="20dp"
- />
- <Button
- android:id="@+id/next"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:background="@drawable/right_btn"
- android:layout_gravity="center"
- />
- </LinearLayout>
- </ScrollView>
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