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如何将图像从Gallery上传到图像视图?

onactivityresult android-image android-imageview android-intent android

TheQ · 技术社区 · 9 年前

所以我尝试将从图库中挑选的图像上传到我的图像视图中。但图像从未出现在图像视图中?程序没有崩溃或其他问题。我使用了一条toast消息来查看onActivityResult是否抓取了图像,它确实抓取了。但它无法将其加载到图像视图中。

希望你们能帮忙,下面是我的代码。

public class TakePhotoActivity extends AppCompatActivity implements View.OnClickListener {
    private View snapButton;
    private ImageButton galleryButton;
    private int RESULT_LOAD_IMAGE = 1;
    private String user_image_path;
    private boolean pickedCamera = false;
    private ImageView myImageView;
    private ProgressBar myprogressBar;

    //GPS
    private LocationManager locationManager = null;
    private LocationListener locationListener = null;

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

    private void setupCamera()
    {
        snapButton = (View) findViewById(R.id.cameraActivity_CameraButton);
        snapButton.setOnClickListener((View.OnClickListener) this);
        snapButton.setOnClickListener(this);
        galleryButton = (ImageButton) findViewById(R.id.cameraActivity_GalleryButton);
        galleryButton.setOnClickListener(this);
        myprogressBar = (ProgressBar) findViewById(R.id.myPB);
        myprogressBar.setVisibility(View.INVISIBLE);

        myImageView = (ImageView) findViewById(R.id.cameraActivity_ImageView);


    }

    private void grabImageFromGallery()
    {
        Intent imageGetter = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
        startActivityForResult(imageGetter, 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};//Array size of 1, and we put in a string
            Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
            cursor.moveToFirst();
            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
            user_image_path = cursor.getString(columnIndex);//here we have our image path.
            cursor.close();

        }
        Picasso.with(this).load(user_image_path).fit().centerCrop().into(myImageView);


    }

    @Override
    public void onClick(View v)
    {
        switch (v.getId())
        {
            case R.id.cameraActivity_GalleryButton:
                grabImageFromGallery();
                break;
        }
    }


}

这是我的xml。

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <include
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        layout="@layout/toolbar_layout">
    </include>

        <ImageView
            android:layout_width="200dp"
            android:layout_height="150dp"
            android:id="@+id/cameraActivity_ImageView"
            android:layout_marginLeft="100dp"
            android:layout_marginTop="50dp"/>




    <RelativeLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">

        <ImageButton
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:background="@drawable/circle_fb_2"
            android:src="@drawable/icon_camera_red"
            android:layout_marginTop="70dp"
            android:layout_marginLeft="70dp"
            android:id="@+id/cameraActivity_CameraButton"/>

        <ImageButton
            android:layout_width="100dp"
            android:layout_height="100dp"
            android:background="@drawable/circle_fb_2"
            android:src="@drawable/icon_gallery"
            android:layout_marginTop="70dp"
            android:layout_marginLeft="150dp"
            android:layout_alignLeft="@id/cameraActivity_CameraButton"
            android:id="@+id/cameraActivity_GalleryButton"/>

        <ProgressBar
            android:layout_width="50dp"
            android:layout_height="50dp"
            android:id="@+id/myPB"
            android:layout_below="@id/cameraActivity_CameraButton"
            android:layout_marginLeft="170dp"/>
    </RelativeLayout>



</LinearLayout>

2 回复 | 直到 9 年前

Suhas Bachewar 9 年前

加载本地映像时,您的路径应该如下“file:///image_path.jpg".

代替

Picasso.with(this).load(user_image_path).fit().centerCrop().into(myImageView);

具有

Picasso.with(this).load("file:///"+user_image_path).fit().centerCrop().into(myImageView);

Aditya Vyas-Lakhan user1796260 9 年前

尝试此方法加载图像并在imageview中显示

public class LoadImage extends Activity
{
    Activity activity=null;
    Context context=null;

    Button header_left_btn=null;
    Button header_right_btn=null;
    TextView header_text=null;
    TableLayout image_table=null;

    ArrayList<String> image_list=new ArrayList<String>();
    ArrayList<Drawable> image_drawable=new ArrayList<Drawable>();
    String path="";

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
        setContentView(R.layout.main);
        getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE,R.layout.header);

        activity=LoadImage.this;
        context=LoadImage.this;

        header_left_btn=(Button)findViewById(R.id.header_left_btn);
        header_right_btn=(Button)findViewById(R.id.header_right_btn);
        header_text=(TextView)findViewById(R.id.header_text);
        image_table=(TableLayout)findViewById(R.id.image_table);

        header_text.setText("Image Table");
        header_left_btn.setText("Select");
        header_right_btn.setText("Clear");
        registerForContextMenu(header_left_btn);

        header_left_btn.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View v)
            {
                // TODO Auto-generated method stub
                openContextMenu(header_left_btn);
            }
        });

        header_right_btn.setOnClickListener(new OnClickListener(){

            @Override
            public void onClick(View v)
            {
                // TODO Auto-generated method stub
                image_list.clear();
                image_drawable.clear();
                deletePhotos();
                updateImageTable();
            }
        });
    }

    public void deletePhotos()
    {
        String folder=Environment.getExternalStorageDirectory() +"/LoadImg";
        File f=new File(folder);
        if(f.isDirectory())
        {
            File[] files=f.listFiles();
            Log.v("Load Image", "Total Files To Delete=====>>>>>"+files.length);
            for(int i=0;i<files.length;i++)
            {
                String fpath=folder+File.separator+files[i].getName().toString().trim();
                System.out.println("File Full Path======>>>"+fpath);
                File nf=new File(fpath);
                if(nf.exists())
                {
                    nf.delete();
                }
            }
        }
    }

    @Override
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo)
    {

        super.onCreateContextMenu(menu, v, menuInfo);
        menu.setHeaderTitle("Post Image");
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.camer_menu, menu);
    }

    @Override
    public boolean onContextItemSelected(MenuItem item)
    {
      switch (item.getItemId())
      {
          case R.id.take_photo:
              //Toast.makeText(context, "Selected Take Photo", Toast.LENGTH_SHORT).show();
              takePhoto();
              break;

          case R.id.choose_gallery:
              //Toast.makeText(context, "Selected Gallery", Toast.LENGTH_SHORT).show();
              Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
              photoPickerIntent.setType("image/*");
              startActivityForResult(photoPickerIntent, 1);

              break;

          case R.id.share_cancel:
              closeContextMenu();
              break;
          default:
            return super.onContextItemSelected(item);
      }
      return true;
    }

    public void takePhoto()
    {
         Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
         File folder = new File(Environment.getExternalStorageDirectory() + "/LoadImg");

         if(!folder.exists())
         {
             folder.mkdir();
         }        
         final Calendar c = Calendar.getInstance();
         String new_Date= c.get(Calendar.DAY_OF_MONTH)+"-"+((c.get(Calendar.MONTH))+1)   +"-"+c.get(Calendar.YEAR) +" " + c.get(Calendar.HOUR) + "-" + c.get(Calendar.MINUTE)+ "-"+ c.get(Calendar.SECOND);
         path=String.format(Environment.getExternalStorageDirectory() +"/LoadImg/%s.png","LoadImg("+new_Date+")");
         File photo = new File(path);
         intent.putExtra(MediaStore.EXTRA_OUTPUT,Uri.fromFile(photo));
         startActivityForResult(intent, 2);
    }

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

        if(requestCode==1)
        {
            Uri photoUri = data.getData();
            if (photoUri != null)
            {
                String[] filePathColumn = {MediaStore.Images.Media.DATA};
                Cursor cursor = getContentResolver().query(photoUri, filePathColumn, null, null, null);
                cursor.moveToFirst();
                int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
                String filePath = cursor.getString(columnIndex);
                cursor.close();
                Log.v("Load Image", "Gallery File Path=====>>>"+filePath);
                image_list.add(filePath);
                Log.v("Load Image", "Image List Size=====>>>"+image_list.size());

                //updateImageTable();
                new GetImages().execute();
            }
        }

        if(requestCode==2)
        {
            Log.v("Load Image", "Camera File Path=====>>>"+path);
            image_list.add(path);
             Log.v("Load Image", "Image List Size=====>>>"+image_list.size());
            //updateImageTable();
             new GetImages().execute();
        }
    }

    public void updateImageTable()
    {
        image_table.removeAllViews();

        if(image_drawable.size() > 0)
        {
            for(int i=0; i<image_drawable.size(); i++)
            {
                TableRow tableRow=new TableRow(this);
                tableRow.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
                tableRow.setGravity(Gravity.CENTER_HORIZONTAL);
                tableRow.setPadding(5, 5, 5, 5);
                for(int j=0; j<1; j++)
                {
                    ImageView image=new ImageView(this);
                    image.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));

                    /*Bitmap bitmap = BitmapFactory.decodeFile(image_list.get(i).toString().trim());
                    bitmap = Bitmap.createScaledBitmap(bitmap,500, 500, true);
                    Drawable d=loadImagefromurl(bitmap);*/
                    image.setBackgroundDrawable(image_drawable.get(i));

                    tableRow.addView(image, 200, 200);
                }
                image_table.addView(tableRow);
            }
        }
    }

    public Drawable loadImagefromurl(Bitmap icon)
    {
        Drawable d=new BitmapDrawable(icon);       
        return d;
    }

    public class GetImages extends AsyncTask<Void, Void, Void>
    {
        public ProgressDialog progDialog=null;

        protected void onPreExecute()
        {
            progDialog=ProgressDialog.show(context, "", "Loading...",true);
        }
        @Override
        protected Void doInBackground(Void... params)
        {
            image_drawable.clear();
            for(int i=0; i<image_list.size(); i++)
            {
                Bitmap bitmap = BitmapFactory.decodeFile(image_list.get(i).toString().trim());
                bitmap = Bitmap.createScaledBitmap(bitmap,500, 500, true);
                Drawable d=loadImagefromurl(bitmap);

                image_drawable.add(d);
            }
            return null;
        }   

        protected void onPostExecute(Void result)
        {
            if(progDialog.isShowing())
            {
                progDialog.dismiss();
            }
            updateImageTable();
        }
    }
}

看见 this