【Android】使用Gallery组件实现循环显示图像
16lz
2021-01-26
刚刚写完博文http://blog.csdn.net/jueblog/article/details/12209969之后,就想着能不能让图片循环播放呢?
试验出一个简便易行的方法。
Activity作如下改进:
只需修改第36行即可:
imagedemo.setImageDrawable(getResources().getDrawable(iViews[position%iViews.length]));
即:
package com.app.test01;import com.app.adapter.ImageAdapter;import android.app.Activity;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.Gallery;import android.widget.ImageView;public class GalleryTest extends Activity{Gallery gallery;ImageView imagedemo;ImageAdapter iAdapter = new ImageAdapter(this);@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(R.layout.activity_gallery);gallery = (Gallery) findViewById(R.id.gallery1);imagedemo = (ImageView) findViewById(R.id.imagedemo);gallery.setAdapter(iAdapter);gallery.setOnItemClickListener(new AdapterView.OnItemClickListener() {@Overridepublic void onItemClick(AdapterView<?> parent, View view,int position, long id) {// TODO Auto-generated method stubInteger[] iViews = iAdapter.getmImageIds();imagedemo.setImageDrawable(getResources().getDrawable(iViews[position%iViews.length]));}});}}
对BaseAdapter适配器做如下改进:
package com.app.adapter;import com.app.test01.R;import android.content.Context;import android.content.res.TypedArray;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.Gallery;import android.widget.ImageView;public class ImageAdapter extends BaseAdapter { private Context mContext; public ImageAdapter(Context c) { mContext = c; } public int getCount() { /* 重写方法getCount,传回图片数目总数 */ return Integer.MAX_VALUE; } public Object getItem(int position) {/* 重写的getItem,传回position */ return position; } public long getItemId(int position) {/*重写方法getItemId,传回position */ return position; } public View getView(int position, View convertView, ViewGroup parent) { ImageView i = new ImageView(mContext); i.setImageResource(mImageIds[position%mImageIds.length]);/* 设定图片给imageView对象 */ i.setLayoutParams(new Gallery.LayoutParams(150,75)); return i; } public Integer[] getmImageIds() {return mImageIds;}public void setmImageIds(Integer[] mImageIds) {this.mImageIds = mImageIds;}private Integer[] mImageIds = { R.drawable.image01, R.drawable.image02, R.drawable.image03, R.drawable.image04, R.drawable.image05, R.drawable.image06, R.drawable.image07, R.drawable.image08, R.drawable.image09, };}
如你所见,仅需修改21行和34行。从而即可实现Gallery组件的循环播放。
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