读取assessts的txt

try {
			// Return an AssetManager instance for your application's package
			InputStream is = getAssets().open("index.txt");
			int size = is.available();
			// Read the entire asset into a local byte buffer.
			byte[] buffer = new byte[size];
			is.read(buffer);
			is.close();
			// Convert the buffer into a string.
			String text = new String(buffer, "GB2312");
			// Finally stick the string into the text view.
			TextView tv = (TextView) findViewById(R.id.text);
			tv.setText(text);
		} catch (IOException e) {
			// Should never happen!
			e.getStackTrace();
		}