从相册中获取选定的图像并显示在ImageView中

Question

我在从图库中选择图片并将其设置到imageview中遇到了问题。假设我有两个活动：mainActivity包含用于访问图库的按钮，而secondactivity包含要显示图像的imageview。

 b1.setOnClickListener(new OnClickListener() {
    public void onClick(View v) {
    Intent i = new Intent(
    Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
    startActivityForResult(i, RESULT_LOAD_IMAGE);
   }
   });

请给我两个人的代码，以便我们可以将他们添加到我们的IT系统中。

- amanjain4all

---

Stack Overflow并不是用来找人帮你写代码的。告诉我们你遇到了什么错误或意外结果，并发布更多的代码，这样我们才能提供帮助。 - Chad Bingham

Answer 1

以下是从图库加载图片的代码：

public class ImageGalleryDemoActivity extends Activity {


    private static int RESULT_LOAD_IMAGE = 1;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Button buttonLoadImage = (Button) findViewById(R.id.buttonLoadPicture);
        buttonLoadImage.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View arg0) {

                Intent i = new Intent(
                        Intent.ACTION_PICK,
                        android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);

                startActivityForResult(i, RESULT_LOAD_IMAGE);
            }
        });
    }


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

        if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
            Uri selectedImage = data.getData();
            String[] filePathColumn = { MediaStore.Images.Media.DATA };

            Cursor cursor = getContentResolver().query(selectedImage,
                    filePathColumn, null, null, null);
            cursor.moveToFirst();

            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
            String picturePath = cursor.getString(columnIndex);
            cursor.close();

            ImageView imageView = (ImageView) findViewById(R.id.imgView);
            imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));

        }


    }
}

- Hamad

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非常感谢您的回答，但我想在新的活动中打开或传递图像..... - amanjain4all

@amanjain4all 然后将这两个selectedImage和filePathColumn放入意图的putExtra中，并在下一个活动中接收它们以加载所选的图像。 - Hamad

Answer 2

使用 Picasso，只需一行代码就能实现，而且无需进行游标查询

我对此进行了扩展以更好地理解：

选择图片

    public void pickImage() {

        Intent intent = new Intent();
        intent.setType("image/*");
        intent.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(Intent.createChooser(intent, "Select Picture"), SELECT_PICTURE);

    }

加载图片

 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
            super.onActivityResult(requestCode, resultCode, data);
            if (resultCode == RESULT_OK) {
                if (requestCode == SELECT_PICTURE) {
    
                    Uri selectedImageURI = data.getData();
    
                    Picasso.with(MainActivity1.this).load(selectedImageURI).noPlaceholder().centerCrop().fit()
                            .into((ImageView) findViewById(R.id.imageView1));
                }
    
            }
        }

- Hitesh Sahu

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SELECT_PICTURE 是什么？ - David Kern

一个随机整数常量，用于标识onActivityResult()回调。在startActivityForResult方法中传递的SELECT_PICTURE常量值应该与onActivityResult的resultCode匹配。 - Hitesh Sahu

Glide 有类似的方法吗？ - Kartik Watwani

Answer 3

在我的情况下，这个解决方案起到了作用。

 private void OpenGallery(){
    Intent getImageIntent = new Intent(Intent.ACTION_GET_CONTENT);
    getImageIntent .setType("image/*");
    startActivityForResult(getImageIntent , IMAGE_PICKER );
}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode== IMAGE_PICKER  && resultCode == RESULT_OK) {
        Uri fullPhotoUri = data.getData();
        imageView.setImageURI(fullPhotoUri);
    }
}

您可以使用putExtra（“fullPhotoUri”，fullPhotoUri.toString（））在活动之间共享URI。

- human

Answer 4

从相册中选择图片，请使用以下代码：

To Pick Image from gallery, use this code.

btn_imageSetter.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        Intent intent = new Intent();
        intent.setType("image/*");
        intent.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(Intent.createChooser(intent, "Select Picture"), IMAGE_PICKER);

    }
});

现在使用此方法将图像设置到ImageViewer中。

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

    if (requestCode == IMAGE_PICKER && resultCode == RESULT_OK && null != data) {
        try{
            final Uri uriImage = data.getData();
            final InputStream inputStream = getContentResolver().openInputStream(uriImage);
            final Bitmap imageMap = BitmapFactory.decodeStream(inputStream);
            iv_image.setImageBitmap(imageMap);
        }
        catch (FileNotFoundException e) {
            e.printStackTrace();
            Toast.makeText(context, "Image was not found", Toast.LENGTH_SHORT).show();
        }

    }


}

- Muhammad Sheharyar

Answer 5

尝试一下。

 b1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View arg0) {
                Intent i = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
                startActivityForResult(i, RESULT_LOAD_IMAGE);
            }
        });



    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) {
            Uri selectedImage = data.getData();
            String[] filePathColumn = { MediaStore.Images.Media.DATA };
            Cursor cursor = getContentResolver().query(selectedImage,filePathColumn, null, null, null);
            cursor.moveToFirst();
            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
            String picturePath = cursor.getString(columnIndex);
            cursor.close();
            ImageView imageView = (ImageView) findViewById(R.id.imgView);
            imageView.setImageBitmap(BitmapFactory.decodeFile(picturePath));
        }
    }

这里是一些例子。

http://viralpatel.net/blogs/pick-image-from-galary-android-app/

http://www.coderzheaven.com/2012/04/20/select-an-image-from-gallery-in-android-and-show-it-in-an-imageview/

- Hariharan

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我想要在不同的活动中打开图库图片？所以请分别给出代码......... - amanjain4all