Question

我正在尝试从图库中选择图像并将其发送到其他活动。它在Kitkat上工作正常，但在android Nougat中不工作。我也尝试了普通的setImageUri和毕加索。仍然无法在Imageview上渲染图像。请参见下面的代码。

MainActivity.java-我有一个按钮，单击按钮时我要打开画廊的意图。

gallery_btn.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Intent intent = new Intent(Intent.ACTION_PICK);
                    intent.setType("image/");
                    startActivityForResult(intent, SELECT_PHOTO);
                }
     });

public void onActivityResult(int requestCode, int resultCode, Intent data) {
            if (resultCode == RESULT_OK) {
                if (requestCode == SELECT_PHOTO) {
                    Uri selectedImageUri = data.getData();
                    Log.d("vishal path", selectedImageUri.toString());
                    selectedImagePath = getPath(selectedImageUri);
                    Intent intent = new Intent(this, ImageActivity.class);
                    intent.putExtra("selectedImg", selectedImagePath);
                    startActivity(intent);
                }
            }
        }



public String getPath(Uri uri) {

        if( uri == null ) {
            return null;
        }

        // this will only work for images selected from gallery
        String[] projection = { MediaStore.Images.Media.DATA };
        Cursor cursor = managedQuery(uri, projection, null, null, null);
        if( cursor != null ){
            int column_index = cursor
                    .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
            cursor.moveToFirst();
            return cursor.getString(column_index);
        }

        return uri.getPath();
    }

通过上述方法，我可以从图库中捕获图像路径。我可以在日志监视器上看到。

ImageActivity

公共类ImageActivity扩展了AppCompatActivity {

ImageView mainImg, brushImg, fontImg;
String imgPath;

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

    mainImg = (ImageView) findViewById(R.id.imageSetMain);
    brushImg = (ImageView) findViewById(R.id.imageBrush);
    fontImg = (ImageView) findViewById(R.id.imageFont);

    mainImg.postInvalidate();;

    Bundle extras = getIntent().getExtras();
    imgPath = extras.getString("selectedImg");
    Log.d("vishal received path", imgPath);
    // mainImg.setImageURI(null);
    // mainImg.setImageURI(Uri.parse(extras.getString("selectedImg")));
    Picasso.with(ImageActivity.this).load(new File(imgPath)).into(mainImg);

    brushImg.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent(ImageActivity.this, DrawActivity.class);
            intent.putExtra("selectedImg", imgPath);
            startActivity(intent);
        }
    });

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

        }
    });
}

}

activity_image.xml

<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.example.mobilesolution.imgedit.ImageActivity">

    <ImageView
        android:id="@+id/imageSetMain"
        android:layout_width="336dp"
        android:layout_height="478dp"
        android:layout_marginLeft="8dp"
        android:layout_marginRight="8dp"
        android:layout_marginTop="16dp"
        app:layout_constraintHorizontal_bias="0.507"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <ImageView
        android:id="@+id/imageBrush"
        android:layout_width="67dp"
        android:layout_height="38dp"
        app:srcCompat="@drawable/brush"
        android:layout_marginLeft="62dp"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        android:layout_marginBottom="16dp"
        android:layout_marginStart="62dp"
        app:layout_constraintRight_toLeftOf="@+id/imageFont"
        android:layout_marginRight="8dp"
        app:layout_constraintHorizontal_bias="0.08"
        android:layout_marginTop="8dp"
        app:layout_constraintTop_toBottomOf="@+id/imageSetMain"
        app:layout_constraintVertical_bias="1.0" />

    <ImageView
        android:id="@+id/imageFont"
        android:layout_width="65dp"
        android:layout_height="37dp"
        app:srcCompat="@drawable/font"
        android:layout_marginStart="8dp"
        android:layout_marginEnd="83dp"
        app:layout_constraintBottom_toBottomOf="parent"
        android:layout_marginBottom="16dp"
        android:layout_marginRight="75dp"
        app:layout_constraintRight_toRightOf="parent"
        android:layout_marginTop="8dp"
        app:layout_constraintTop_toBottomOf="@+id/imageSetMain"
        app:layout_constraintVertical_bias="1.0" />

</android.support.constraint.ConstraintLayout>

现在，主要的罪魁祸首在这里-

我正在使用Maintent在MainActivity.java中选择图像，我将图像路径传递到了下一个名为ImageActivity.java的活动。

在ImageActivity.java中，我使用了imageView.setImageUri（uri），但无法在设备上看到图像。毕加索也一样。

我为毕加索添加了以下依赖项

compile 'com.squareup.picasso:picasso:2.5.2'

我还为清单文件添加了以下权限

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.MANAGE_DOCUMENTS"/>

    <uses-feature android:name="android.hardware.camera" />
    <uses-feature android:name="android.hardware.camera.autofocus" />

任何帮助都是有意义的。

Answer 1

我认为您应该在下面检查此答案：

ACTION_PICK image picker returns diffrent uri formats

也许不同的Android OS版本会返回不同的内容uri

Answer 2

        Intent data = getIntent();
        Uri selectedImage = data.getData();

        Bitmap imageBitmap = null;

        if(selectedImage != null && selectedImage.getAuthority() != null) {
            //https://stackoverflow.com/a/30567302/1042124
            InputStream is = null;
            try {
                is = getContentResolver().openInputStream(selectedImage);
                imageBitmap = BitmapFactory.decodeStream(is);
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } finally {
                try {
                    if (is != null) {
                        is.close();
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        else {
            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();
            imageBitmap = BitmapFactory.decodeFile(picturePath);
        }

最后，如果imageBitmap不为null，则将位图通过Picasso加载到ImageView中或直接加载。

Answer 3

尝试从文件路径制作位图。然后将位图设置为您的ImageView。

            String ImagePath = getIntent().getStringExtra("selectedImg");
            Bitmap map = BitmapFactory.decodeFile(ImagePath );
            mainImg.setImageBitmap(map);

无法使用正常的setImageUri和毕加索在ImageView上设置图像-Android牛轧糖

3 个答案: