我正在编写一个涉及选择多个图像并将它们上传到解析服务器的 Android 应用程序。我已经使用 Telegram Android Gallery 选择器实现了多个图像选择，我现在可以将它们上传到 Parse，但是将它们转换为位图会使应用程序冻结 15 分钟，所以我试图将这部分代码在后台移动到 no有用，我最终保存了一个空数组。我假设任务在保存之前没有结束或者执行不正确。欢迎所有输入！
谢谢！这是代码：
public class AddProductActivity extends AppCompatActivity implements View.OnClickListener {
private Bitmap bitmap;
private byte[] byteArray;
private List<String> photos;
private ArrayList<ParseFile> images;
private ImageButton imageButton;
private Future future;
private ExecutorService executorService;
@Override
public void onClick(View view) {
if (view.getId() == R.id.addImageBtn) {
GalleryConfig config = new GalleryConfig.Build()
.limitPickPhoto(8)
.singlePhoto(false)
.hintOfPick("Vous pouvez choisir un max de 8 photos.")
.filterMimeTypes(new String[]{"image/*"})
.build();
GalleryActivity.openActivity(AddProductActivity.this, 2, config);
}
}
public void publish(View view) {
EditText productName = (EditText) findViewById(R.id.productNameField);
EditText productDescription = (EditText) findViewById(R.id.productDescriptionField);
EditText productPrice = (EditText) findViewById(R.id.priceField);
if (productName.getText().toString().matches("")
|| productDescription.getText().toString().matches("")
|| productPrice.getText().toString().matches("")) {
Toast.makeText(this, "Tous les champs sont requis", Toast.LENGTH_SHORT).show();
} else {
if (byteArray == null) {
Toast.makeText(AddProductActivity.this, "Ajoutez des images de l'article!", Toast.LENGTH_SHORT).show();
} else {
ParseObject object = new ParseObject("Product");
object.put("name", productName.getText().toString());
object.put("description", productDescription.getText().toString());
object.put("price", productPrice.getText().toString());
object.put("city", ParseUser.getCurrentUser().get("City").toString());
object.put("username", ParseUser.getCurrentUser().getUsername());
object.addAll("productImages", images);
object.saveInBackground(new SaveCallback() {
@Override
public void done(ParseException ex) {
if (ex == null) {
executorService.shutdown();
// Try uploading the ParseFiles using the save method before associating them with the Parse Object
Intent intent = new Intent(getApplicationContext(), MainActivity.class);
startActivity(intent);
} else {
Toast.makeText(AddProductActivity.this, "Il y a eu un soucis, réessayer dans 5mins!", Toast.LENGTH_SHORT).show();
}
}
});
}
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
//async task
photos = (List<String>) data.getSerializableExtra(GalleryActivity.PHOTOS);
executorService = Executors.newSingleThreadExecutor();
future = executorService.submit(new Callable(){
public Object call() throws Exception {
images = new ArrayList<ParseFile>();
for (String photo : photos) {
bitmap = BitmapFactory.decodeFile(photo);
ByteArrayOutputStream stream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, stream);
byteArray = stream.toByteArray();
ParseFile file = new ParseFile("image.png", byteArray);
try {
file.save();
} catch (ParseException e) {
e.printStackTrace();
}
images.add(file);
Log.i("Size", String.valueOf(images.size()));
}
return images;
}
});
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_add_product);
imageButton = (ImageButton) findViewById(R.id.addImageBtn);
imageButton.setOnClickListener(this);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowTitleEnabled(false);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
if (checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
requestPermissions(new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, 2);
}
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// handle arrow click here
if (item.getItemId() == android.R.id.home) {
finish(); // close this activity and return to preview activity (if there is any)
}
return super.onOptionsItemSelected(item);
} }
这是XML文件
<LinearLayout
android:id="@+id/activity_add_product"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.shopapp.AddProductActivity"
android:orientation="vertical"
android:weightSum="1">
<!-- our toolbar -->
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary"
android:minHeight="?attr/actionBarSize"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>
<TextView
android:text="@string/addProductTextview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/addProductTextview"
android:textAlignment="center"
android:textSize="24sp"
android:textStyle="normal|bold"
android:textColor="?attr/actionModeSplitBackground" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textPersonName"
android:ems="10"
android:id="@+id/productNameField"
android:hint="@string/productNameField" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="textMultiLine"
android:ems="10"
android:id="@+id/productDescriptionField"
android:hint="@string/productDrescriptionField" />
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="numberDecimal"
android:ems="10"
android:id="@+id/priceField"
android:hint="@string/productPriceField" />
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:srcCompat="@android:drawable/ic_menu_camera"
android:id="@+id/addImageBtn"
android:contentDescription="@string/addImageProductBtnDescription" />
<Button
android:text="@string/publishProductBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/publishProductBtn"
android:onClick="publish" />