Android 控件之ImageSwitcher图片切换器
16lz
2021-01-23
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 }} <script type="text/javascript"></script> <!--done-->
更多相关文章
- Android常用控件的使用方法
- Android 控件在布局中按比例放置
- Android 使用Canvas在图片上绘制文字的方法
- TextView/EditText各种各样的效果
- Android中从图库中选取图片实例详解
- imageView的Selector图片选择问题