从非 activity class 调用 startActivityForResult() 并在现有 activity 或片段中获取结果

Question

我的 IntentHelper class 是

public class IntentHelper {

    private Activity activity;

    // Camera activity request code
    public static final int CAMERA_CAPTURE_IMAGE_REQUEST_CODE = 100;
    //Gallery activity request code
    public static final int GALLERY_OPEN_IMAGE_REQUEST_CODE = 101;

    public IntentHelper(Activity activity){
        this.activity = activity;
    }

    /**
     * Launching gallery to get image
     */
    public void getGalleryImage(){

        Intent intent = new Intent();
        intent.setType("image/*");
        intent.setAction(Intent.ACTION_GET_CONTENT);
        intent.putExtra("aspectX", 1);
        intent.putExtra("aspectY", 1);
        intent.putExtra("scale", true);
        intent.putExtra("outputFormat",
                Bitmap.CompressFormat.JPEG.toString());

        activity.startActivityForResult(Intent.createChooser(intent, "Select Image"),GALLERY_OPEN_IMAGE_REQUEST_CODE);
    }
}

我将片段中的 class 称为：

IntentHelper intentHelper = new IntentHelper(getActivity());
intentHelper.getGalleryImage();

按照这个逻辑，我的图库意图已经成功打开。但是:

 @Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    // following if condition is not executing
    if(requestCode == IntentHelper.GALLERY_OPEN_IMAGE_REQUEST_CODE)
    {
        if(resultCode == RESULT_OK){

            SnackbarHelper.showSnackBar("Image browsed sucessfully",getView());
            Toast.makeText(getContext(), "Image browsed successfully", Toast.LENGTH_SHORT).show();

        }
        else if(requestCode == RESULT_CANCELED){
            SnackbarHelper.showSnackBar("Image browsed cancelled",getView());
        }
    }
}

我不知道为什么会这样。我的意图被完美地调用并且让我返回相同的 activity 那为什么这个 onActivityResult() 条件不起作用？？？

My all code is in fragment. But I don't think so it cause this problem

编辑 - 解决方案

因为@laalto 给出的答案是正确的。我必须使用片段实例启动 startActivityForResult() 。

因此我将 IntentHelper class 更改为：

public class IntentHelper {
/*
* Instead of Activity use Fragment
*/
private Fragment fragment;

// Camera activity request code
public static final int CAMERA_CAPTURE_IMAGE_REQUEST_CODE = 100;
//Gallery activity request code
public static final int GALLERY_OPEN_IMAGE_REQUEST_CODE = 101;

public IntentHelper(Fragment fragment){
    this.fragment = fragment;
}

/**
 * Launching gallery to get image
 */
public void getGalleryImage()  {
    Intent intent = new Intent();
    intent.setType("image/*");
    intent.setAction(Intent.ACTION_GET_CONTENT);
    intent.putExtra("aspectX", 1);
    intent.putExtra("aspectY", 1);
    intent.putExtra("scale", true);
    intent.putExtra("outputFormat",
            Bitmap.CompressFormat.JPEG.toString());

    // Use fragment for startActivityForResult() to initiate.
    fragment.startActivityForResult(Intent.createChooser(intent, "Select Image"),GALLERY_OPEN_IMAGE_REQUEST_CODE);
}

}

IntentHelper 启动为：

IntentHelper intentHelper = new IntentHelper(this);
intentHelper.getGalleryImage();

修改后一切正常！！！

Answer 1

我想你可以在 activity 的 onActivityResult 中试试这个，调用 super.onActivityResult()

在片段中在你的片段中确保你调用

startActivityForResult(intent,111); instead of getActivity().startActivityForResult(intent,111); inside your fragment.

Answer 2

你必须打电话 super.onActivityResult(requestCode, resultCode, data); 在 onActivityResult() 的 activity 中容纳片段之前片段本身可以接收 onActivityResult() 触发。只需将以下内容放入 Activity:

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
}

Answer 3

My all code is in fragment. But I don't think so it cause this problem

就是这个问题。

如果您调用 Activity#startActivityForResult()，您会在 activity 中收到 onActivityResult。

如果您调用 Fragment#startActivityForResult()，您会在该片段中收到 onActivityResult。

（这是如何在引擎盖下完成的，FragmentActivity 将片段索引编码为那些结果应该转到片段的调用的请求代码。）

因此，在 activity 中调用 startActivityForResult() 并期望在片段中看到结果是行不通的。要么将请求移动到片段，要么将响应处理移动到 activity.

此外，如果您不处理结果，请将其传递给 super 实施。

从非 activity class 调用 startActivityForResult() 并在现有 activity 或片段中获取结果

call to startActivityForResult() from non activity class and getting result in existing activity or fragment

android

startactivityforresult