android - 让图像通过 AlertDialog 时出现问题

Question

我有一些代码可以从相机库中获取照片。当您使用 Activity 中的按钮获取图片并将图片放在该 Activity 上时，它工作正常，但是当我尝试使用 AlertDialog 上的按钮时，我无法将它放到我的 Imageview 中。有帮助吗？

这段代码本身没问题

    ((Button)dialogView.findViewById(R.id.button3))
            .setOnClickListener(new OnClickListener() {
                public void onClick(View arg0) {
                    Intent intent = new Intent();
                    intent.setType("image/*");
                    intent.setAction(Intent.ACTION_GET_CONTENT);
                    startActivityForResult(Intent.createChooser(intent,"Select Picture"),SELECT_PICTURE);}
                public void onActivityResult(int requestCode, int resultCode, Intent data) {
                    if (resultCode == RESULT_OK) {
                        if (requestCode == SELECT_PICTURE) {
                            Uri selectedImageUri = data.getData();
                            selectedImagePath = getPath(selectedImageUri);
                            System.out.println("Image Path : " + selectedImagePath);
                            im1.setImageURI(selectedImageUri);}}}
                public String getPath(Uri uri) {
                    String[] projection = { MediaStore.Images.Media.DATA };
                    Cursor cursor = managedQuery(uri, projection, null, null, null);
                    int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
                    cursor.moveToFirst();
                    return cursor.getString(column_index);}});

但是当您将此代码添加到 AlertDialog 时，它将不再起作用

        lay1.setOnLongClickListener(new OnLongClickListener() {
            public boolean onLongClick(View v) {
                LayoutInflater myLayout = LayoutInflater.from(context);
                final View dialogView = myLayout.inflate(R.layout.alerthelp, null);
                AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(context);
                alertDialogBuilder.setView(dialogView);
                final AlertDialog alertDialog = alertDialogBuilder.create();


                ((Button) dialogView.findViewById(R.id.button3))
                        .setOnClickListener(new OnClickListener() {
                            public void onClick(View arg0) {
                                Intent intent = new Intent();
                                intent.setType("image/*");
                                intent.setAction(Intent.ACTION_GET_CONTENT);
                                startActivityForResult(Intent.createChooser(intent, "Select Picture"), SELECT_PICTURE);
                            }

                            public void onActivityResult(int requestCode, int resultCode, Intent data) {
                                if (resultCode == RESULT_OK) {
                                    if (requestCode == SELECT_PICTURE) {
                                        Uri selectedImageUri = data.getData();
                                        selectedImagePath = getPath(selectedImageUri);
                                        System.out.println("Image Path : " + selectedImagePath);
                                        im1.setImageURI(selectedImageUri);
                                    }
                                }
                            }

                            public String getPath(Uri uri) {
                                String[] projection = {MediaStore.Images.Media.DATA};
                                Cursor cursor = managedQuery(uri, projection, null, null, null);
                                int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
                                cursor.moveToFirst();
                                return cursor.getString(column_index);
                            }
                        });
                alertDialog.show();
                return true;
            }
        });

我已经从 Button 测试了另一个 Activity 的代码，它工作正常，但是当我打开 alertDialog 来执行它时，我无法将图片返回到我的 imageview。我仍然可以进入我的图库并单击图片，但是当我尝试保存它时，它不会将图片放入 imageView。

Answer 1

尝试将方法 onActivityResult 与其他 Activity 方法一起移到点击监听器之外，就像这样

public class MyActivity extends Activity {

// other methods and fields

private ImageView im1;

// initialize im1 in your onCreate() method

    public void onActivityResult(int requestCode, int resultCode, Intent data) {
                                if (resultCode == RESULT_OK) {
                                    if (requestCode == SELECT_PICTURE) {
                                        Uri selectedImageUri = data.getData();
                                        selectedImagePath = getPath(selectedImageUri);
                                        System.out.println("Image Path : " + selectedImagePath);
                                        im1.setImageURI(selectedImageUri);
                                    }
                                }
     }
}