java - OnActivityResult 没有被调用

Question

在 Activity A 中，我想打开一个对话框(CustomDialog)。在 CustomDialog 内部，它有一个用于打开相机的按钮。但是在我从图库中选择图像后，onActivityResult 没有被调用。没有显示toast。

Activity A

private void openDialog() {
        CustomDialog alert = new CustomDialog();
        alert.showDialog(this);
    }

自定义对话框

public class CustomDialog extends Activity{

    Activity activity;
    ImageView imageView;

    public void showDialog(Activity activity) {
        this.activity = activity;
        final Dialog dialog = new Dialog(activity);
        dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
        dialog.setCancelable(false);
        dialog.setContentView(R.layout.custom_dialog);
        dialog.getWindow().setBackgroundDrawableResource(android.R.color.transparent);
        dialog.setCanceledOnTouchOutside(true);

        imageView = (ImageView) dialog.findViewById(R.id.logoApp);

        Button galleryBtn = (Button) dialog.findViewById(R.id.galleryBtn);

        galleryBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                galleryIntent();
            }
        });
        dialog.show();
    }

    private void galleryIntent() {
        Intent intent = new Intent();
        intent.setType("image/*");
        intent.setAction(Intent.ACTION_GET_CONTENT);//
        activity.startActivityForResult(Intent.createChooser(intent, "Select File"), 1);
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        Toast.makeText(activity,"sdddddsss",Toast.LENGTH_LONG).show();
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == Activity.RESULT_OK) {
            if (requestCode == 1) {
                onSelectFromGalleryResult(data);
            }else{
              // ...
            }
        }
    }

    @SuppressWarnings("deprecation")
    private void onSelectFromGalleryResult(Intent data) {
        Bitmap bm=null;
        if (data != null) {
            try {
                bm = MediaStore.Images.Media.getBitmap(getApplicationContext().getContentResolver(), data.getData());
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        imageView.setImageBitmap(bm);
    }
}

我关注这个http://www.theappguruz.com/blog/android-take-photo-camera-gallery-code-sample

Answer 1

当您在 Activity A 中显示对话框时，您将对 Activity A 的引用设置为参数:alert.showDialog(this);然后在 CustomDialog 中，将此引用保存为 Activity 变量:

public void showDialog( Activity Activity ) {
this.activity = Activity ；
...}

这意味着 this.activity 是 Activity A 的实例。稍后在 galleryIntent() 中，您启动 Activity 以获得如下结果:

private void galleryIntent() {
...
Activity.startActivityForResult(Intent.createChooser(intent, "选择文件"), 1);
}

这意味着 onActivityResult 将在 Activity A 中调用，而不是您的自定义对话框，因为您使用了 activity 变量。

您有 2 个修复选项:

1) 将 activity.startActivityForResult 替换为 CustomDialog.this.startActivityForResult

2) 将 onActivityResult 代码从 CustomDialog 移至 Activity A