因此，我計劃將輸入的數據存儲到 JSON 文件中，并且希望將該 JSON 文件存儲到手機的本地存儲中。但是我的代碼中有這個錯誤。這是關于 JsonWriter。誰能幫我？// THIS IS MY CODEprivate void writeToFile(OutputStream out, List<Wordbank> wordList) throws IOException{ JsonWriter writer = new JsonWriter(new OutputStreamWriter(out, "UTF-8")); writer.setIndent(" "); writeWordbankArray(writer, wordList); writer.close();}public void writeWordbankArray(JsonWriter writer, List<Wordbank> wordList) throws IOException{ writer.beginArray(); for(Wordbank wl : wordList){ writeWordbank(writer, wl); } writer.endArray();}public void writeWordbank(JsonWriter writer, Wordbank wordbank) throws IOException{ writer.beginObject(); writer.name("English").value(wordbank.getEnglish()); writer.name("Cebuano").value(wordbank.getCebuano()); writer.name("Pronounciation").value(wordbank.getPronounciation()); writer.name("POS").value(wordbank.getPos()); writer.name("Audio").value(wordbank.getAudio()); if(wordbank.getImage() != null || wordbank.getFx() != null){ writer.name("Picture").value(wordbank.getImage()); writer.name("Effect").value(wordbank.getFx()); }else{ writer.name("No name").nullValue(); } writer.endObject();}// 下面是錯誤2018-10-18 18:48:52.372 4965-4965/com.example.sampleFile/AndroidRuntime: FATAL EXCEPTION: mainProcess: com.example.sampleFile, PID: 4965以上是錯誤。我需要這方面的幫助，請幫幫我！
2 回答
繁星淼淼
TA貢獻1775條經驗 獲得超11個贊
您可以使用另一種方法。以下代碼
writer.name("English").value(wordbank.getEnglish());
writer.name("Cebuano").value(wordbank.getCebuano());
writer.name("Pronounciation").value(wordbank.getPronounciation());
writer.name("POS").value(wordbank.getPos());
writer.name("Audio").value(wordbank.getAudio());
if(wordbank.getImage() != null || wordbank.getFx() != null){
writer.name("Picture").value(wordbank.getImage());
writer.name("Effect").value(wordbank.getFx());
}else{
writer.name("No name").nullValue();
}
告訴我您已經知道會發生什么，您可以創建一個 POJO 類并使用 Gson 庫將該 POJO 對象解析為 JSON 格式的字符串。稍后您可以將其用作
JSONObject jsonObj = new JSONObject(Jsonstring);
這是一個例子
ModelPOJO modelPojo = new ModelPojo();
modelPojo.setEnglish("value");
Gson gson = new Gson();
String jsonString = gson.toJson(modelPojo);
jsonString 是必需的字符串。要將其寫入本地存儲，您可以采用@jake breen 的方法。
希望能幫助到你 ！:)
白板的微信
TA貢獻1883條經驗 獲得超3個贊
try {
File file = new File("<storage location>" + filename + ".json");
Writer writer = new BufferedWriter(new FileWriter(file));
writer.write(jsonObject.toString());
writer.close();
} catch (Exception e) {
Log.e("File Exception: ", e.getMessage());
}
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