你不能在他的范围之外调用这个方法。
protected void onActivityResult (int requestCode, int resultCode, Intent data)
如果方法像这种情况一样受到保护，您可以查看访问级别表以了解如何继续。
|-----------------------------------------------------------|
| ACCESS LEVELS |
|------------------|---------|---------|----------|---------|
| Modifier | Class | Package | Subclass | World |
|------------------|---------|---------|----------|---------|
| public | Y | Y | Y | Y |
|------------------|---------|---------|----------|---------|
| protected | Y | Y | Y | N |
|------------------|---------|---------|----------|---------|
| no modifier | Y | Y | N | N |
|------------------|---------|---------|----------|---------|
| private | Y | N | N | N |
|------------------|---------|---------|----------|---------|
如您所见，该方法只能从android.app.*包、Activity及其子类中调用。
解决方案：
你需要做这样的事情：
我们有一个类ImagePicker 用于从图库或相机或删除中选择图像。如果用户想要删除图像，这个类需要调用onActivityResult（我们不需要为我们已经知道的结果开始一个Activity）。
public class ImagePicker {
private ImagePickerDelegate delegate;
public ImagePicker (ImagePickerDelegate delegate) {
this.delegate = delegate;
}
//Will explain this two methods later
public void show() {
//Some code to show AlertDialog
}
public void handleResponse(Intent data) {
//Some code to handle onActivityResult
}
//Our interface to delegate some behavior
public interface ImagePickerDelegate {
void onImageHandled(Bitmap image);
void onImageError();
void onImageDeleted();
}
}
为了在我们的Activity 中使用这个类，我们需要实现委托方法并将我们的活动作为ImagePicker 的委托传递：
public class MyActivity extends Activity implements ImagePicker.ImagePickerDelegate {
ImagePicker imagePicker;
@OnClick(R.id.image_edit)
public void selectImage () {
imagePicker = new ImagePicker(this);
imagePicker.show();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == ImagePicker.REQUEST_IMAGE_PICKER && resultCode == RESULT_OK) {
imagePicker.handleResponse(data);
}
super.onActivityResult(requestCode, resultCode, data);
}
@Override
public void onImageHandled(Bitmap image) {
//handle image resized
imageView.setImageBitmap(image);
}
@Override
public void onImageError() {
//handle image error
Toast.makeText(this, "Whoops - unexpected error!", Toast.LENGTH_SHORT).show();
}
@Override
public void onImageDeleted() {
//handle image deleted
groupImageView.setImageBitmap(null);
groupImageView.setImageResource(R.drawable.ic_pick_picture);
}
}
最后，我们需要调用 thou 个委托方法，这发生在 show() 和 handleResponse(Intent data)：
//The show method create and dialog with 3 options,
//the important thing here, is when an option is selected
public void show() {
//Inflating some views and creating dialog...
NavigationView navView = (NavigationView)viewInflated.findViewById(R.id.navigation_menu);
navView.setNavigationItemSelectedListener( new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
switch (menuItem.getItemId()) {
case R.id.action_select_image:
Intent pickPhoto = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
activity.startActivityForResult(pickPhoto , REQUEST_IMAGE_PICKER);
break;
case R.id.action_take_picture:
Intent takePicture = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
activity.startActivityForResult(takePicture, REQUEST_IMAGE_PICKER);
break;
case R.id.action_delete_image:
delegate.onImageDeleted(); //send response to activity
break;
}
alertDialog.dismiss();
return true;
}
});
//Show dialog...
}
//this method is called from onActivityResult
public void handleResponse(Intent data) {
try {
//Retrieve and resize image...
delegate.onImageHandled(image); //send the image to activity
} catch (Exception e) {
e.printStackTrace();
delegate.onImageError(); //send error to activity
}
}
最后，我们拥有的是一个class，它可以调用Activity 中的方法而不是onActivityResult，但是当您在onActivityResult 中得到结果时，您需要在其中处理它class