[转]Java Code Examples for android.util.JsonReader

/**
 * Reads an existing ModuleStats instance from a JSON file
 * @param fr The FileReader to read from
 * @throws IOException
 */
private void initModuleStatsFromJson(FileReader fr) throws IOException {
	JsonReader reader = new JsonReader(fr);

	reader.beginArray();
	while (reader.hasNext()) {
		reader.beginObject();
		int exerciseIndex = -1;
		boolean result = true;
		long timestamp = -1;

		while (reader.hasNext()){
			String name = reader.nextName();
               switch (name) {
                   case "exerciseIndex":
                       exerciseIndex = reader.nextInt();
                       break;
                   case "result":
                       result = reader.nextBoolean();
                       break;
                   case "timestamp":
                       timestamp = reader.nextLong();
                       break;
                   default:
                       reader.skipValue();
                       break;
               }
		}
		moduleAnswerList.add(new ModuleAnswer(exerciseIndex, result, timestamp));
		reader.endObject();

	} 
	reader.endArray();
	reader.close();
}

public static CardHolder readFromJson( JsonReader reader ) throws IOException
{
    CardHolder player = new CardHolder();

    reader.beginObject();
    while( reader.hasNext() )
    {
        String name = reader.nextName();
        if( name.equals( JSON_ID ) )
        {
            player.mID = reader.nextString();
        }
        else if( name.equals( JSON_NAME ) )
        {
            player.mName = reader.nextString();
        }
        else if( name.equals( JSON_CARDS ) && reader.peek() != JsonToken.NULL )
        {
            reader.beginArray();
            while( reader.hasNext() )
            {
                player.addCard( Card.readFromJson( reader ) );
            }
            reader.endArray();
        }
        else
        {
            reader.skipValue();
        }
    }
    reader.endObject();

    return player;
}

/**
 * Loads this Module‘s properties and data from the JSON data of the given Reader
 * @param r The Reader from which to read the JSON data
 * @throws IOException
 */
private void initModuleFromJson(Reader r) throws IOException {
	JsonReader reader = new JsonReader(r);

	reader.beginObject();
	while (reader.hasNext()) {
		String name = reader.nextName();
           switch (name) {
               case "moduleId":
                   this.id = reader.nextInt();
                   break;
               case "title":
                   this.title = reader.nextString();
                   break;
               case "description":
                   this.description = reader.nextString();
                   break;
               case "shortDescription":
                   this.shortDescription = reader.nextString();
                   break;
               case "lowestNote":
                   this.lowestNote = reader.nextInt();
                   break;
               case "highestNote":
                   this.highestNote = reader.nextInt();
                   break;
               case "difficulty":
                   this.difficulty = reader.nextInt();
                   break;
               case "version":
                   this.toolVersion = reader.nextString();
                   break;
               case "moduleVersion":
                   this.moduleVersion = reader.nextInt();
                   break;
               case "exerciseList":
                   reader.beginArray();
                   for (int i = 0; reader.hasNext(); i++) {
                       this.exerciseList.add(new Exercise());
                       reader.beginArray();
                       for (int j = 0; reader.hasNext(); j++) {
                           this.exerciseList.get(i).exerciseUnits.add(new ArrayList<Integer>());
                           reader.beginArray();
                           while (reader.hasNext()) {
                               this.exerciseList.get(i).exerciseUnits.get(j).add(reader.nextInt());
                           }
                           reader.endArray();
                       }
                       reader.endArray();
                   }
                   reader.endArray();
                   break;
               case "answerList":
                   reader.beginArray();
                   while (reader.hasNext()) {
                       this.answerList.add(reader.nextString());
                   }
                   reader.endArray();
                   break;
               default:
                   reader.skipValue();
                   break;
           }
	}
	reader.endObject();
	reader.close();
}