从库中选择图像到imageview

Question

我在从图库中选择图像并将其设置为图像时遇到问题imageview.假设我有两个活动; mainActivity包含图库的按钮,secondactivity包含imageview图像必须显示的按钮.

 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....

Answer 1

这是从库加载图像的代码:

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));

        }


    }
}

Answer 2

用Picasso它可以在一行完成,你不需要制作cursor query

我已经扩展它以便更好地理解: -

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));
                }

            }
        }