Android ImageSwitcher和Gallery 综合使用

转载地址：点击打开链接

一个简易的相册

功能描述： 点击按钮进入下一屏，在屏幕上面展示一个大图，在屏幕的下面是一组可以滚动的图片，点击滚动的图片可以显示在上面的控件中。

开发环境：eclipse3.4.2  AndroidSDK2.0 ADT0.9.7

代码：

1.MainActivity 单击按钮时，跳转到 ImageShowActivity

package com.small.photos;import com.small.photos.R;import android.widget.*;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;public class MainActivity extends Activity {OnClickListener listener0 = null;Button button0;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);// 单击按钮跳转到ImageShowActivitylistener0 = new OnClickListener() {public void onClick(View v) {Intent intent = new Intent(MainActivity.this,ImageShowActivity.class);startActivity(intent);}};button0 = (Button) findViewById(R.id.image_show_button);button0.setOnClickListener(listener0);}}

 2. main.xml  定义入口按钮

<?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"    > <Button android:id="@+id/image_show_button"              android:text="ImageSwitcher Gallery"              android:layout_width="wrap_content"              android:layout_height="wrap_content">      </Button>  </LinearLayout>

3.image_show.xml 

    ImageSwitcher是用来图片显示那块区域的控件  Gallery 是来控制底下那个图标列表索引用的

<?xml version="1.0" encoding="utf-8"?><RelativeLayout   xmlns:android="http://schemas.android.com/apk/res/android"   android:layout_width="fill_parent"   android:layout_height="fill_parent">    <ImageSwitcher android:id="@+id/ImageSwitcher01"     android:layout_height="fill_parent"    android:layout_width="fill_parent"    android:layout_alignParentTop="true"  android:layout_alignParentLeft="true">  </ImageSwitcher>       <Gallery      android:id="@+id/gallery"     android:background="#55000000"     android:layout_width="fill_parent"     android:layout_height="60dp"     android:layout_alignParentBottom="true"     android:layout_alignParentLeft="true"     android:gravity="center_vertical"     android:spacing="16dp" />  </RelativeLayout>

 4.ImageShowActivity

 R.drawable.sample_thumb_0 为图片的标识

图片放在res/drawable/目录下  图片名称为sample_thumb_0.gif

package com.small.photos;import android.app.Activity;import android.content.Context;import android.os.Bundle;import android.view.View;import android.view.ViewGroup;import android.view.Window;import android.view.animation.AnimationUtils;import android.widget.AdapterView;import android.widget.BaseAdapter;import android.widget.Gallery;import android.widget.ImageSwitcher;import android.widget.ImageView;import android.widget.AdapterView.OnItemSelectedListener;import android.widget.RelativeLayout.LayoutParams;import android.widget.ViewSwitcher.ViewFactory;public class ImageShowActivity extends Activity implements ViewFactory,OnItemSelectedListener {/** Called when the activity is first created. */ImageSwitcher mSwitcher;private Integer[] mThumbIds = { R.drawable.sample_thumb_0,R.drawable.sample_thumb_1, R.drawable.sample_0, R.drawable.sample_1 };private Integer[] mImageIds = { R.drawable.sample_thumb_0,R.drawable.sample_thumb_1, R.drawable.sample_0, R.drawable.sample_1 };@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);requestWindowFeature(Window.FEATURE_NO_TITLE);setContentView(R.layout.image_show);setTitle("ImageShowActivity");mSwitcher = (ImageSwitcher) findViewById(R.id.ImageSwitcher01);// 系统的anim中的fade_in.xmlmSwitcher.setFactory(this);mSwitcher.setInAnimation(AnimationUtils.loadAnimation(this,android.R.anim.fade_in));mSwitcher.setOutAnimation(AnimationUtils.loadAnimation(this,android.R.anim.fade_out));Gallery g = (Gallery) findViewById(R.id.gallery);// 为缩略图浏览器指定一个适配器g.setAdapter(new ImageAdapter(this));// 响应 在缩略图列表上选中某个缩略图后的 事件g.setOnItemSelectedListener(this);}@SuppressWarnings("unchecked")public void onItemSelected(AdapterView parent, View v, int position, long id) {mSwitcher.setImageResource(mImageIds[position]);}@SuppressWarnings("unchecked")public void onNothingSelected(AdapterView parent) {}@Overridepublic View makeView() {ImageView i = new ImageView(this);i.setBackgroundColor(0xFF000000);i.setScaleType(ImageView.ScaleType.FIT_CENTER);i.setLayoutParams(new ImageSwitcher.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));return i;}public class ImageAdapter extends BaseAdapter {private Context mContext;public ImageAdapter(Context c) {mContext = c;}public int getCount() {return mThumbIds.length;}public Object getItem(int position) {return position;}public long getItemId(int position) {return position;}        //getView方法动态生成一个ImageView,然后利用setLayoutParams、setImageResource、//setBackgroundResource分别设定图片大小、图片源文件和图片背景。当图片被显示到当前//屏幕的时候，这个函数就会被自动回调来提供要显示的ImageViewpublic View getView(int position, View convertView, ViewGroup parent) {ImageView i = new ImageView(mContext);i.setImageResource(mThumbIds[position]);i.setAdjustViewBounds(true);i.setLayoutParams(new Gallery.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));i.setBackgroundResource(R.drawable.picture_frame);return i;}}}

  5.AndroidManifest.xml  标识MainActivity为一个程序的开始

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"      package="com.small.photos"      android:versionCode="1"      android:versionName="1.0">    <application android:label="@string/app_name">        <activity android:name=".ImageShowActivity"                  android:label="@string/app_name">                    </activity>    <activity android:name="MainActivity"><intent-filter><action android:name="android.intent.action.MAIN"></action><category android:name="android.intent.category.LAUNCHER"></category></intent-filter></activity></application></manifest> 

然后运行就行了！