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android - 如何将活动实例转换为 gson

问题描述

在下面的代码中，我试图将活动转换为 JSON 对象，以便可以通过意图将此类对象传递给服务。请参阅 code_1 和 code_2 部分中发布的代码。但是，当应用程序执行时，我收到下面发布的错误。

    java.lang.IllegalArgumentException: class android.content.res.ColorStateList declares multiple JSON fields named mChangingConfigurations

请让我知道为什么我会收到这样的错误以及如何解决它。

代码_1：

public class JsonConverterAndroidOS implements IConvertToJson {
    @Override
    public String convertToJosn(Context ctx) {
    Gson gson = new Gson();
    Log.i("", "gson.toJson(ctx) : " + gson.toJson(ctx));
    return gson.toJson(ctx);
    }
}

代码_2：

this.mBtn_Start_GPS_Readings.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            Toast.makeText(getApplicationContext(), "GPS_READINGS", Toast.LENGTH_SHORT).show();
            Intent intentStartGPSService = new Intent(getApplicationContext(), GPSService.class);
            intentStartGPSService.setAction(ACTION_START_GPS_READING);

            //activity to json conversion
            IConvertToJson converter = new JsonConverterAndroidOS();
            String convertedToJson = converter.convertToJosn(MainActivity.this);
            intentStartGPSService.putExtra(KEY_MAIN_ACTIVITY_INSTANCE, convertedToJson);
            //startService(intentStartGPSService);
        }
    });

错误：

2019-06-15 10:45:12.898 1983-2013/com.example.gps_v10 E/eglCodecCommon: glUtilsParamSize: unknow param 0x000082da
2019-06-15 10:45:12.899 1983-2013/com.example.gps_v10 E/eglCodecCommon: glUtilsParamSize: unknow param 0x000082da
2019-06-15 10:45:26.411 1983-1983/com.example.gps_v10 E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.gps_v10, PID: 1983
java.lang.IllegalArgumentException: class android.content.res.ColorStateList declares multiple JSON fields named mChangingConfigurations
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:172)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:102)
    at com.google.gson.Gson.getAdapter(Gson.java:457)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:117)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:166)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:102)
    at com.google.gson.Gson.getAdapter(Gson.java:457)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:117)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:166)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:102)
    at com.google.gson.Gson.getAdapter(Gson.java:457)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.createBoundField(ReflectiveTypeAdapterFactory.java:117)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.getBoundFields(ReflectiveTypeAdapterFactory.java:166)
    at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory.create(ReflectiveTypeAdapterFactory.java:102)
    at com.google.gson.Gson.getAdapter(Gson.java:457)
    at com.google.gson.Gson.toJson(Gson.java:695)
    at com.google.gson.Gson.toJson(Gson.java:682)
    at com.google.gson.Gson.toJson(Gson.java:637)
    at com.google.gson.Gson.toJson(Gson.java:617)
    at com.example.gps_v10.JsonConverterAndroidOS.convertToJosn(JsonConverterAndroidOS.java:12)
    at com.example.gps_v10.MainActivity$1.onClick(MainActivity.java:49)
    at android.view.View.performClick(View.java:6256)
    at android.view.View$PerformClick.run(View.java:24701)
    at android.os.Handler.handleCallback(Handler.java:789)
    at android.os.Handler.dispatchMessage(Handler.java:98)
    at android.os.Looper.loop(Looper.java:164)
    at android.app.ActivityThread.main(ActivityThread.java:6541)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
2019-06-15 10:45:26.422 1983-1990/com.example.gps_v10 I/zygote: Do partial code cache collection, code=30KB, data=26KB
2019-06-15 10:45:26.422 1983-1990/com.example.gps_v10 I/zygote: After code cache collection, code=30KB, data=26KB
2019-06-15 10:45:26.422 1983-1990/com.example.gps_v10 I/zygote: Increasing code cache capacity to 128KB

标签： androidjsongson

解决方案

看起来您需要服务内部的上下文，因此您正在尝试将 Activity 对象转换为 JSON 对象（根据我的理解）。解决方案是只在服务内部使用这个关键字， Context context = this;因为服务仅由上下文组成，也许更多细节可以帮助您在服务中获取上下文

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