VideoImage.java

package com.jwzhangjie.videoplayer.share;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

import com.jwzhangjie.videoplayer.R;
import com.jwzhangjie.videoplayer.component.AppActivityClose;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.media.ThumbnailUtils;
import android.os.AsyncTask;
import android.os.Bundle;
import android.provider.MediaStore.Video.Thumbnails;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;

public class VideoImage extends Activity{
	public List<String> video_path;
	public String path;
	public static ImageAdapterVideo imageAdapterV;
	private GridView video_gridview;
	public static VideoImage instance;
	Bitmap bitmapV = null;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.videoimage);
		instance = this;
		AppActivityClose.getInstance().addActivity(this); //tianjia
		path = "/mnt/sdcard";//AppInforToCustom.getAppInforToCustomInstance().getCameraShootingPath();
		imageAdapterV = new ImageAdapterVideo(getApplicationContext());
		video_gridview = (GridView)findViewById(R.id.videoGallery);
		video_gridview.setAdapter(imageAdapterV);
		video_gridview.setOnItemClickListener(new OnItemClickListener() {
 			public void onItemClick(AdapterView<?> parent, View view,
 					int position, long id) {
 				try
				{
 					File file = new File(video_path.get(position).toString());
     				if (file.exists())
					{
     					ShareActivity.isBackground = true;
						Intent v = new Intent();
	     				v.setClass(VideoImage.this, VideoGalleryActivity.class);
	     				v.putExtra("videoPath", video_path.get(position).toString());
	     				v.putExtra("position", position);
	     				startActivity(v);
					}else {
						//如果用户在后台删除视频，这里则重新加载所有的视频
						video_path = getInSDVideo();
						imageAdapterV.notifyDataSetChanged();
						showMessage("文件已经删除");
					}
     				file = null;
				} catch (IndexOutOfBoundsException e)
				{
					e.printStackTrace();
				} catch (Exception e) {
					e.printStackTrace();
				}
 			}
 		});
		video_path = getInSDVideo();
		if (video_path.size() >= 100)
		{
			showMessage("视频大于100个以后的不显示");
		}
		getAsyncTaskVideo();
	}
	/**
     * 异步加载视频缩略图
     */
    public void getAsyncTaskVideo() {
		@SuppressWarnings("deprecation")
		final Object data = getLastNonConfigurationInstance();
		if (data == null) {
			new AsyncTaskLoadVideo(VideoImage.this, video_path).execute(); 
		} else {
			final Bitmap[] videos = (Bitmap[]) data;
			if (videos.length == 0) {
				new AsyncTaskLoadVideo(VideoImage.this,video_path).execute();
			}
			for (Bitmap photo : videos) {
				imageAdapterV.addPhoto(photo);
				imageAdapterV.notifyDataSetChanged();
			}
		}
	}
    /**
     * 视频异步类
     * @author zhangjie
     */
    class AsyncTaskLoadVideo extends AsyncTask<Object, Bitmap, Object> {
		private List<String> video_lis;
		public AsyncTaskLoadVideo(Context mContext,
				List<String> path) {
			video_lis = path;
		}
		/*
		 * 获取视频的缩图
		 * 先通过ThumbnailUtils来创建一个视频的图，然后再利用ThumbnailUtils来生成指定大小的图
		 * MICRO_KIND
		 */
		@Override
		protected Object doInBackground(Object... params) {
			Bitmap bitmapV = null;
			int size = video_lis.size();
			for(int i = 0 ; i < size; i++){
				bitmapV = getVideoThumbnail(video_lis.get(i).toString(), 190,82, Thumbnails.MICRO_KIND);
				if (bitmapV != null) {
					publishProgress(bitmapV);
				}else{
					    Bitmap bitmapP1 = BitmapFactory.decodeResource(getResources(), R.drawable.zhangjie); 
			            if(bitmapP1 !=null){
			            	bitmapV = Bitmap.createScaledBitmap(bitmapP1,190,82,true);
			            	 publishProgress(bitmapV);
			            }
				}
			}
			return null;
		}
		@Override
		protected void onPostExecute(Object result) {
		}

		@Override
		protected void onProgressUpdate(Bitmap... values) {
			for (Bitmap bitmap : values) {
				imageAdapterV.addPhoto(bitmap);
				imageAdapterV.notifyDataSetChanged();
			}
		}
    }
    /**
     * 获取视频缩略图
     * @param videoPath
     * @param width
     * @param height
     * @param kind
     * @return
     */
    private Bitmap getVideoThumbnail(String videoPath, int width , int height, int kind){
		Bitmap bitmap = null;
		bitmap = ThumbnailUtils.createVideoThumbnail(videoPath, kind);
		bitmap = ThumbnailUtils.extractThumbnail(bitmap, width, height, ThumbnailUtils.OPTIONS_RECYCLE_INPUT);
		return bitmap;
	}
	/*
	 * 获取SD卡指定目录的视频列表
	 */
	public List<String> getInSDVideo() {
		List<String> it_p = new ArrayList<String>();
		File f = new File(path);
		if (!f.exists()){
			f.mkdirs();
		}else {
			File[] files = f.listFiles();
			for(File file : files){
				if (file.isFile()) {
					String fileName = file.getName(); 
						if (fileName.endsWith(".mp4")) {
							it_p.add(file.getPath());
						}
						if (it_p.size() >= 100)
						{
							showMessage("视频文件大于100以后不显示");
							break;
						}
					}
				}
			}
		return it_p;
	}
	public void showMessage(String msg){
		Toast toast = Toast.makeText(instance, msg, Toast.LENGTH_LONG);
		toast.show();
	}
}