android 更具File 启动不同的intent

import java.io.File;
import java.util.HashMap;

import android.content.Intent;
import android.net.Uri;

public class FileIntentUtil {

	private static final int INTENT_IMAGE = 1;
	private static final int INTENT_AUDIO = 2;
	private static final int INTENT_VIDEO = 3;
	private static final int INTENT_PACHAGE = 4;
	private static final int INTENT_WEBTEXT = 5;
	private static final int INTENT_TEXT = 6;
	private static final int INTENT_WORD = 7;
	private static final int INTENT_EXCEL = 8;
	private static final int INTENT_PPT = 9;
	private static final int INTENT_PDF = 10;
	private static final int INTENT_CHM = 11;
	private static final int INTENT_MAX = 12;

	private static FileIntentUtil _instance;
	private static Object lockObj = new Object();
	private final HashMap<String, Integer> map;

	public Intent getFileIntent(String filepath) {
		return getFileIntent(new File(filepath));
	}

	public Intent getFileIntent(File file) {

		String filename = file.getName();
		String[] ss = filename.split("\\.");
		int type = -1;
		if (ss.length > 1) {
			String ext = ss[ss.length - 1];
			if (ext != null && map.containsKey(ext)) {
				type = map.get(ext);
			}
		}
		if (type > 0 && type < INTENT_MAX) {

			Intent intent = new Intent();
			intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
			intent.setAction(Intent.ACTION_VIEW);
			Uri uri = Uri.fromFile(file);

			switch (type) {
			case INTENT_AUDIO:
				intent.putExtra("oneshot", 0);
				intent.putExtra("configchange", 0);
				intent.setDataAndType(uri, "audio/*");
				break;
			case INTENT_CHM:
				intent.setDataAndType(uri, "application/x-chm");
				break;
			case INTENT_EXCEL:
				intent.setDataAndType(uri, "application/vnd.ms-excel");
				break;
			case INTENT_IMAGE:
				intent.setDataAndType(uri, "image/*");
				break;
			case INTENT_PDF:
				intent.setDataAndType(uri, "application/pdf");
				break;
			case INTENT_PACHAGE:
				intent.setDataAndType(Uri.fromFile(file),
						"application/vnd.android.package-archive");
				break;
			case INTENT_PPT:
				intent.setDataAndType(uri, "application/vnd.ms-powerpoint");
				break;
			case INTENT_TEXT:
				intent.setDataAndType(uri, "text/plain");
				break;
			case INTENT_VIDEO:
				intent.putExtra("oneshot", 0);
				intent.putExtra("configchange", 0);
				intent.setDataAndType(uri, "video/*");
				break;
			case INTENT_WEBTEXT:
				uri = Uri.fromFile(file).buildUpon()
						.encodedAuthority("com.android.htmlfileprovider")
						.scheme("content").encodedPath(file.toString()).build();
				intent.setDataAndType(uri, "text/html");

				break;
			case INTENT_WORD:
				intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
				intent.setDataAndType(uri, "application/msword");
				break;
			}
			return intent;
		}
		return null;
	}

	private FileIntentUtil() {
		map = new HashMap<String, Integer>();

		// images
		map.put("png", INTENT_IMAGE);
		map.put("gif", INTENT_IMAGE);
		map.put("jpg", INTENT_IMAGE);
		map.put("jpeg", INTENT_IMAGE);
		map.put("bmp", INTENT_IMAGE);

		// audio
		map.put("mp3", INTENT_AUDIO);
		map.put("wav", INTENT_AUDIO);
		map.put("ogg", INTENT_AUDIO);
		map.put("midi", INTENT_AUDIO);

		// video
		map.put("mp4", INTENT_VIDEO);
		map.put("rmvb", INTENT_VIDEO);
		map.put("avi", INTENT_VIDEO);
		map.put("flv", INTENT_VIDEO);

		// package
		map.put("jar", INTENT_PACHAGE);
		map.put("zip", INTENT_PACHAGE);
		map.put("rar", INTENT_PACHAGE);
		map.put("gz", INTENT_PACHAGE);
		map.put("apk", INTENT_PACHAGE);
		map.put("img", INTENT_PACHAGE);

		// web text
		map.put("htm", INTENT_WEBTEXT);
		map.put("html", INTENT_WEBTEXT);
		map.put("php", INTENT_WEBTEXT);
		map.put("jsp", INTENT_WEBTEXT);

		// text
		map.put("txt", INTENT_TEXT);
		map.put("java", INTENT_TEXT);
		map.put("c", INTENT_TEXT);
		map.put("cpp", INTENT_TEXT);
		map.put("py", INTENT_TEXT);
		map.put("xml", INTENT_TEXT);
		map.put("json", INTENT_TEXT);
		map.put("log", INTENT_TEXT);

		// word
		map.put("doc", INTENT_WORD);
		map.put("docx", INTENT_WORD);

		// excel
		map.put("xls", INTENT_EXCEL);
		map.put("xlsx", INTENT_EXCEL);

		// ppt
		map.put("ppt", INTENT_PPT);
		map.put("pptx", INTENT_PPT);

		// pdf
		map.put("pdf", INTENT_PDF);

		// chm
		map.put("chm", INTENT_CHM);

	}

	public static FileIntentUtil instance() {
		if (_instance == null) {
			synchronized (lockObj) {
				if (_instance == null) {
					_instance = new FileIntentUtil();
				}
			}
		}
		return _instance;
	}

}