记录一下在Android使用Json解析字符串

要解析的字符串如下，是一串camera的参数：

{
    "formats": [
        {
            "index": 1,
            "type": 4,
            "default": 1,
            "size": [
                "640*480",
                "352*288",
                "320*240",
                "176*144",
                "160*120"
            ]
        }
    ]
}

ArrayList<PreviewSize> mPreviewSizes = new ArrayList<FormatParser.PreviewSize>();

	private int index;
	private int type;
	private int def;
	
	public FormatParser()
	{

	}
	
	public void parseJsonFormat(String string)
	{
		try
		{
			JSONObject mJsonObject = new JSONObject(string);
			Log.d(TAG, "JsonString:" + string);
			JSONArray mArray = mJsonObject.getJSONArray("formats");	//获取formats数组
			//formats中只有一个对象，直接从其中获取一些参数
			index = mArray.getJSONObject(0).getInt("index");		
			type = mArray.getJSONObject(0).getInt("type");
			def = mArray.getJSONObject(0).getInt("default");
			
			//从formats中获取size数组
			JSONArray mSizeArray = mArray.getJSONObject(0).getJSONArray("size");
			mPreviewSizes.clear();
			//遍历size数组，取出分辨率字符串，拆分成长和宽
			for (int i = 0; i < mSizeArray.length(); i++)
			{
				PreviewSize mSize = new PreviewSize();
				String strSize = mSizeArray.getString(i);
				String[] strs = strSize.split("*");
				mSize.width = Integer.parseInt(strs[0]);
				mSize.height = Integer.parseInt(strs[1]);
				Log.d(TAG, "width:" + mSize.width + "  height:" + mSize.height);
			}
		} catch (JSONException e)
		{
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}

	public class PreviewSize
	{
		public int width;
		public int height;
	}