如何使用所选图像更新显示的对话框图像视图？

Question

我正在使用Alert对话框来获取用户团队图片的图像，然后我想在已经打开的对话框上显示图像预览。

我正在将图像文件传递到我的对话框显示的那个片段，但是我如何更新那个在对话框中的ImageView我试图更新适配器，我可以通过它来通知数据但是在调用该片段之后我仍然得到null适配器

  public void passingImage(Image image) {
    testAdapter.notifyImage(image);
}

这是我的警报对话框代码

public void showDialogForTeam(ChallengeData mData) {
    this.mData = mData;
    dialogForTeam = new Dialog(activity);
    dialogForTeam.requestWindowFeature(Window.FEATURE_NO_TITLE);
    dialogForTeam.setContentView(R.layout.dialog_team_selection);
    dialogForTeam.setTitle("Select Team");
    spinner = (Spinner) dialogForTeam.findViewById(R.id.spinner);
    imgClose = (ImageView) dialogForTeam.findViewById(R.id.imageView);


    RecyclerView.LayoutManager layoutManager5 = new LinearLayoutManager(getActivity());
    rvLogo = (RecyclerView) dialogForTeam.findViewById(R.id.rv_logo);
    rvLogo.setHasFixedSize(true);
    rvLogo.setLayoutManager(layoutManager5);

    rvLogo.setAdapter(testAdapter);
    btnUpload = (TextView) dialogForTeam.findViewById(R.id.btn_upload_icon);
    tealLogo = (ImageView) dialogForTeam.findViewById(R.id.team_logo);


    btnUpload.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            int permissionCheck = ContextCompat.checkSelfPermission(activity, Manifest.permission.WRITE_EXTERNAL_STORAGE);
            if (permissionCheck == PackageManager.PERMISSION_GRANTED) {
                openGallery();

            } else {
                Nammu.askForPermission(activity, Manifest.permission.WRITE_EXTERNAL_STORAGE, new PermissionCallback() {
                    @Override
                    public void permissionGranted() {
                        openGallery();

                    }

                    @Override
                    public void permissionRefused() {

                    }
                });
            }

        }
    });
    GridView gridView = (GridView) dialogForTeam.findViewById(R.id.grid_view);
    // Instance of ImageAdapter Class
    gridView.setAdapter(new ImageAdapter(activity, this));
    Spinner spinner1 = (Spinner) dialogForTeam.findViewById(R.id.spinner1);
    final LinearLayout llMyteam = (LinearLayout) dialogForTeam.findViewById(R.id.ll_m_team);
    final RecyclerView recyclerViewTeam = (RecyclerView) dialogForTeam.findViewById(R.id.rv_team);
    String[] strings = new String[0];
    if (mData.getIsTeamcreater().equals("true")) {
        strings = new String[]{"Join as Team Member", "Create Team"};
    } else
        strings = new String[]{"Join as Team Member"};
    spinner.setAdapter(new ArrayAdapter<>(activity, R.layout.row_simple_text, strings));
    spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
            if (parent.getItemAtPosition(position).toString().equals("Join as Team Member")) {
                llMyteam.setVisibility(View.GONE);
                recyclerViewTeam.setVisibility(View.VISIBLE);
            } else {
                llMyteam.setVisibility(View.VISIBLE);
                recyclerViewTeam.setVisibility(View.GONE);
            }
        }

        @Override
        public void onNothingSelected(AdapterView<?> parent) {

        }
    });
    spinner1.setAdapter(new ArrayAdapter<>(activity, R.layout.row_simple_text, strings));
    if (mData.getTeams() != null && mData.getTeams().size() > 0) {
        RecyclerView.LayoutManager layoutManager4 = new LinearLayoutManager(activity);
        recyclerViewTeam.setHasFixedSize(true);
        recyclerViewTeam.setLayoutManager(layoutManager4);
        JoinTeamChallengeAdapter allTeamAdapter = new JoinTeamChallengeAdapter(activity, mData.getTeams(), this);
        recyclerViewTeam.setAdapter(allTeamAdapter);
    }

    imgClose.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            dialogForTeam.dismiss();
        }
    });
    dialogForTeam.show();

}

public void openGallery() {
    ImagePicker.create(activity)
            .folderMode(true) // folder mode (false by default)
            .folderTitle("Folder") // folder selection title
            .imageTitle("Tap to select") // image selection title
            .single() // single mode
            .limit(1) // max images can be selected (99 by default)
            .showCamera(true) // show camera or not (true by default)
            .imageDirectory("Camera") // directory name for captured image  ("Camera" folder by default)
            .start(9686); // start image picker activity with request code
}

MianActivity

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    Log.e(TAG, "onActivityResult    :" + requestCode);
    if (requestCode == 9686) {
        ArrayList<Image> images = data.getParcelableArrayListExtra(ImagePickerActivity.INTENT_EXTRA_SELECTED_IMAGES);
        if (images.size() > 0 && images.size() == 1){
            image = images.get(0);
            mainHomeFragment.passingImage(image);
        }

    } else if (requestCode == 9687) {
        ArrayList<Image> images = data.getParcelableArrayListExtra(ImagePickerActivity.INTENT_EXTRA_SELECTED_IMAGES);
        if (images.size() > 0 && images.size() == 1)
            onPhotoReturned(images.get(0));
    }

    super.onActivityResult(requestCode, resultCode, data);

}

Answer 1

在Point下的Android Developer页面获取缩略图是一个示例，它显示了如何在使用Intent捕获它后在Activity的现有ImageView中添加Photo。 我希望这正是你要找的。

编辑：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
        Bundle extras = data.getExtras();
        Bitmap imageBitmap = (Bitmap) extras.get("data");
        mImageView.setImageBitmap(imageBitmap);
    }
}

如您所见，您可以通过需要Bitmap的命令setImageBitmap(image)更改Image视图。 如果这对您没有帮助，请尝试查看ImageView的Api