标题：

gson 序列化model 闪退

错误信息：

java.lang.NumberFormatException: empty String

错误原因：

类型不统一，gson 后台 string 转 int时，“” 导致崩溃

eg:

{

"name" : "Test1",

"business_type" : "90"

}

{

"name" : "Test1",

"business_type" : ""

}

@SerializedName("business_type")

int businessType;

解决方案：

Gson gson = new Gson();

替换为

private Gson gson = new GsonBuilder()

.registerTypeAdapter(int.class, new IntTypeAdapter())

.registerTypeAdapter(Integer.class, new IntTypeAdapter()).create();

工具类如下

class IntTypeAdapter extends TypeAdapter {

@Override

public void write(JsonWriter out, Number value)

throws IOException {

out.value(value);

}

@Override

public Number read(JsonReader in) throws IOException {

if (in.peek() == JsonToken.NULL) {

in.nextNull();

return null;

}

try {

String result = in.nextString();

if ("".equals(result)) {

return null;

}

return Integer.parseInt(result);

} catch (NumberFormatException e) {

throw new JsonSyntaxException(e);

}

}

}