【Android 界面效果6】Android 控件之ImageSwitcher图片切换器

ImageSwitcher是Android中控制图片展示效果的一个控件，如：幻灯片效果...，颇有感觉啊。做相册一绝



源码下载

一、重要方法

　　　　setImageURI(Uri uri)：设置图片地址

　　　　setImageResource(int resid)：设置图片资源库

　　　　setImageDrawable(Drawable drawable)：绘制图片

二、实例

　　 <ImageSwitcher android:id="@+id/switcher"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:layout_alignParentTop="true"

android:layout_alignParentLeft="true"

/>

<Gallery android:id="@+id/gallery"

android:background="#55000000"

android:layout_width="match_parent"

android:layout_height="60dp"

android:layout_alignParentBottom="true"

android:layout_alignParentLeft="true"

android:gravity="center_vertical"

android:spacing="16dp"

/>

is = (ImageSwitcher) findViewById(R.id.switcher);

is.setFactory(this);

设置动画效果

is.setInAnimation(AnimationUtils.loadAnimation(this,

android.R.anim.fade_in));

is.setOutAnimation(AnimationUtils.loadAnimation(this,

android.R.anim.fade_out));

　　

三、完整代码

1.布局文件

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent">

<ImageSwitcher android:id="@+id/switcher"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:layout_alignParentTop="true"

android:layout_alignParentLeft="true"

/>

<Gallery android:id="@+id/gallery"

android:background="#55000000"

android:layout_width="match_parent"

android:layout_height="60dp"

android:layout_alignParentBottom="true"

android:layout_alignParentLeft="true"

android:gravity="center_vertical"

android:spacing="16dp"

/>

</RelativeLayout>

2.Java代码

package wjq.WidgetDemo;

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.OnItemClickListener;

import android.widget.AdapterView.OnItemSelectedListener;

import android.widget.Gallery.LayoutParams;

import android.widget.ViewSwitcher.ViewFactory;

public class ImageSwitcherDemo extends Activity implements

OnItemSelectedListener, ViewFactory {

private ImageSwitcher is;

private Gallery gallery;

private Integer[] mThumbIds = { R.drawable.b, R.drawable.c,

R.drawable.d, R.drawable.f, R.drawable.g,

};

private Integer[] mImageIds = { R.drawable.b, R.drawable.c,

R.drawable.d, R.drawable.f, R.drawable.g, };

/*

* (non-Javadoc)

*

* @see android.app.Activity#onCreate(android.os.Bundle)

*/

@Override

protected void onCreate(Bundle savedInstanceState) {

// TODO Auto-generated method stub

super.onCreate(savedInstanceState);

requestWindowFeature(Window.FEATURE_NO_TITLE);

setContentView(R.layout.imageswitcherpage);

is = (ImageSwitcher) findViewById(R.id.switcher);

is.setFactory(this);

is.setInAnimation(AnimationUtils.loadAnimation(this,

android.R.anim.fade_in));

is.setOutAnimation(AnimationUtils.loadAnimation(this,

android.R.anim.fade_out));

gallery = (Gallery) findViewById(R.id.gallery);

gallery.setAdapter(new ImageAdapter(this));

gallery.setOnItemSelectedListener(this);

}

@Override

public View makeView() {

ImageView i = new ImageView(this);

i.setBackgroundColor(0xFF000000);

i.setScaleType(ImageView.ScaleType.FIT_CENTER);

i.setLayoutParams(new ImageSwitcher.LayoutParams(

LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));

return i;

}

public class ImageAdapter extends BaseAdapter {

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;

}

public 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.e);

return i;

}

private Context mContext;

}

@Override

public void onItemSelected(AdapterView<?> parent, View view, int position,

long id) {

is.setImageResource(mImageIds[position]);

}

@Override

public void onNothingSelected(AdapterView<?> parent) {

// TODO Auto-generated method stub

}

}