pocketcommunityclient/app/src/main/java/com/community/pocket/util/HttpFileResponse.java

package com.community.pocket.util;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;

import androidx.lifecycle.MutableLiveData;

import org.jetbrains.annotations.NotNull;

import java.io.IOException;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.Response;
import okhttp3.ResponseBody;

public class HttpFileResponse implements Callback {

    private static final String header = "Content-Type";

    private final MutableLiveData<Bitmap> image;

    public HttpFileResponse(MutableLiveData<Bitmap> image) {
        this.image = image;
    }

    @Override
    public void onFailure(@NotNull Call call, @NotNull IOException e) {
        e.printStackTrace();
        Log.e(HttpJSONResponse.class.getName(), e.toString());
    }

    @Override
    public void onResponse(@NotNull Call call, @NotNull Response response) {
        String contentType = response.header(header);
        if ("image/png".equals(contentType)) {
            ResponseBody responseBody = response.body();
            if (responseBody != null) {
                Bitmap bitmap = BitmapFactory.decodeStream(responseBody.byteStream());
                image.postValue(bitmap);
            }
        } else {
            onParseError(call, response, "接口不是响应图片数据，非法响应头" + header + "=" + contentType);
        }
    }

    private void onParseError(@NotNull Call call, @NotNull Response response, String err) {
        Log.e(HttpJSONResponse.class.getName(), err);
        throw new RuntimeException(err);
    }
}