Question

使用Intent单击图像并启动Android Camera时出现问题。我通过意图数据获得的图像包含调整大小的位图图像的信息。也许我有错误的理解，但请建议我该怎么做才能纠正它。 ImageView显示我点击的相同图像，但显示的图像非常模糊

以下是基础代码：

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
InputStream stream= null;
        super.onActivityResult(requestCode, resultCode, data);
        if(this.requestCode == requestCode && resultCode == RESULT_OK){
            try{
                //stream= getContentResolver().openInputStream(data.getData());
                Bundle extras= data.getExtras();
                Bitmap bitmap = (Bitmap) extras.get("data");
                imageHolder.setImageBitmap(bitmap);
            }
            catch (Exception ex){
                ex.printStackTrace();
            }
        }
    }

Answer 1

       try{
            //stream= getContentResolver().openInputStream(data.getData());
            Bundle extras= data.getExtras();
            Bitmap bitmap = (Bitmap) extras.get("data");
            //set value Width=200, Height=200
            Bitmap resizedimg = Bitmap.createScaledBitmap(bitmap, Width, Height, true);

            imageHolder.setImageBitmap(resizedimg);
        }
        catch (Exception ex){
            ex.printStackTrace();
        }

Answer 2

也许你应该将uri传递给相机，并在ActivityResult而不是位图时从中获取图像

Answer 3

试试这个：

    public class MainActivity extends Activity {

    static int CAMERA_TAKE_PIC =1;
    Uri outPutfileUri;
    ImageView mImageView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mImageView = (ImageView) findViewById(R.id.image);
    }


    public void CameraClick(View v) {

        Intent intent= new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        File file = new File(Environment.getExternalStorageDirectory(),
                "Photo.jpg");
        outPutfileUri = Uri.fromFile(file);
        intent.putExtra(MediaStore.EXTRA_OUTPUT, outPutfileUri);
        startActivityForResult(intent, CAMERA_TAKE_PIC);
    }

    Bitmap bitmap = null;

    @Override
    protected void onActivityResult(int requestCode, int resultCode,Intent data)
    {
        if (requestCode == CAMERA_TAKE_PIC && resultCode==RESULT_OK) {

            String uri = outPutfileUri.toString();
            Log.e("uri-:", uri);
            Toast.makeText(this, outPutfileUri.toString(),Toast.LENGTH_LONG).show();

            //Bitmap myBitmap = BitmapFactory.decodeFile(uri);
           // mImageView.setImageURI(Uri.parse(uri));   OR drawable make image strechable so try bleow also

            try {
                bitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), outPutfileUri);
                Drawable d = new BitmapDrawable(getResources(), bitmap);
                mImageView.setImageDrawable(d);
            } catch (IOException e) {
                e.printStackTrace();
            }


        }
}

}

我认为图像模糊，因为意图数据仅包含图像的thumbnail。您可以将图像保存在内部/外部存储上，然后获取它。

Answer 4

图像可能模糊，因为意图数据仅包含图像的缩略图。您必须将图像保存在内部/外部存储器上，然后才能获取它。此外，您的问题应该是如何从相机获取全尺寸图像。完成此文档https://developer.android.com/training/camera/photobasics.html。

这是应该如何做的

Intent i=new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File dir=
    Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM);

output=new File(dir, "CameraContentDemo.jpeg");
i.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(output));

startActivityForResult(i, CONTENT_REQUEST);

参考可以在此链接中找到。

https://stackoverflow.com/a/32121829/3111083

位图图像大小调整

4 个答案: