提问人:Shardul Birje 提问时间:10/19/2021 更新时间:10/19/2021 访问量:170
在 Android 中使用 api 将图像上传到 Imgur 时出错
Error while uploading images to Imgur with api in Android
问:
我正在使用 Imgur API 上传图像。使用相机单击图像并存储为位图,该位图进一步转换为 Base-64 字符串。
然后,我将 Base-64 字符串传递给一个函数,该函数应将图像上传到 Imgur。但是代码返回错误:android.os.NetworkOnMainThreadException
图像捕获并转换为 Base-64:
ActivityResultLauncher<Intent> someActivityResultLauncher = registerForActivityResult(
new ActivityResultContracts.StartActivityForResult(),
new ActivityResultCallback<ActivityResult>() {
@Override
public void onActivityResult(ActivityResult result) {
if (result.getResultCode() == Activity.RESULT_OK) {
//Bitmap part
Intent data = result.getData();
Bitmap captureImage=(Bitmap) data.getExtras().get("data");
//Base-64 part
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
captureImage.compress(Bitmap.CompressFormat.PNG, 100, byteArrayOutputStream);
byte[] byteArray = byteArrayOutputStream .toByteArray();
String encoded = Base64.encodeToString(byteArray, Base64.DEFAULT);
upload(encoded);
//profilePic.setImageBitmap(captureImage);
}
}
});
imageButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//Camera Capture
Intent intent=new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
someActivityResultLauncher.launch(intent);
}
});
要上传的代码:
public void upload(String encoded){
OkHttpClient client = new OkHttpClient().newBuilder()
.build();
MediaType mediaType = MediaType.parse("text/plain");
RequestBody body = new MultipartBody.Builder().setType(MultipartBody.FORM)
.addFormDataPart("image",encoded)
.build();
Request request = new Request.Builder()
.url("https://api.imgur.com/3/image")
.method("POST", body)
.addHeader("Authorization", "Client-ID {{MY_ID}}")
.build();
try {
Response response = client.newCall(request).execute();
Log.wtf("RESPONSE",""+response);
} catch (IOException e) {
e.printStackTrace();
}
}
如果这很重要,我正在使用 Android Studio 并在 AVD (API-30) 上运行该应用程序。
答:
1赞
Danish
10/19/2021
#1
在后台线程上运行 upload() 函数:
ActivityResultLauncher<Intent> someActivityResultLauncher = registerForActivityResult(
new ActivityResultContracts.StartActivityForResult(),
new ActivityResultCallback<ActivityResult>() {
@Override
public void onActivityResult(ActivityResult result) {
if (result.getResultCode() == Activity.RESULT_OK) {
//Bitmap part
Intent data = result.getData();
Bitmap captureImage=(Bitmap) data.getExtras().get("data");
//Base-64 part
ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
captureImage.compress(Bitmap.CompressFormat.PNG, 100, byteArrayOutputStream);
byte[] byteArray = byteArrayOutputStream .toByteArray();
String encoded = Base64.encodeToString(byteArray, Base64.DEFAULT);
new Thread(new Runnable() {
@Override
public void run() {
upload(encoded); //background stuff
runOnUiThread(new Runnable() {
public void run() {
// do onPostExecute stuff
}
});
}
}).start();
//profilePic.setImageBitmap(captureImage);
}
}
})
注意:上述解决方案不是执行异步任务的最佳方式。最好的选择是 Rxjava/RxAndroid 来执行异步任务。
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upload()