我不能能夠把我的圖片到新的活動，從SD卡裝載

Question

圖片活動

public class ImageAdapter extends BaseAdapter { 


private Context context; 
Bitmap bm; 

ArrayList<String>images = new ArrayList<String>(); 



// Integer[] images; 
void add(String path) { 
    images.add(path); 
} 


public ImageAdapter(Context c) { 
    context = c; 
} 

@Override 
public int getCount() { 
    return images.size(); 
} 

@Override 
public Object getItem(int position) { 

    return images; 
} 

@Override 
public long getItemId(int position) { 
    return 0; 
} 

@Override 
public View getView(int position, View convertView, ViewGroup parent) { 

    ImageView imageView = new ImageView(context); 
    if (convertView == null) { 
     //  imageView.setImageResource(images[position]); 
     // imageView.setImageBitmap(images); 
     imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE); 
     imageView.setLayoutParams(new GridView.LayoutParams(240, 240)); 
     return imageView; 
    } else { 
     imageView = (ImageView) convertView; 

    } 
    bm = decodeSampledBitmapFromUri(images.get(position), 220, 220); 
    imageView.setImageBitmap(bm); 
return imageView; 
} 

private Bitmap decodeSampledBitmapFromUri(String path, int reqWidth, int reqHeight) { 
    Bitmap bm = null; 
    // First decode with inJustDecodeBounds=true to check dimensions 
    final BitmapFactory.Options options = new BitmapFactory.Options(); 
    options.inJustDecodeBounds = true; 
    BitmapFactory.decodeFile(path, options); 

    // Calculate inSampleSize 
    options.inSampleSize = calculateInSampleSize(options, reqWidth, reqHeight); 

    // Decode bitmap with inSampleSize set 
    options.inJustDecodeBounds = false; 
    bm = BitmapFactory.decodeFile(path, options); 

    return bm; 
} 
public int calculateInSampleSize(

     BitmapFactory.Options options, int reqWidth, int reqHeight) { 
    // Raw height and width of image 
    final int height = options.outHeight; 
    final int width = options.outWidth; 
    int inSampleSize = 1; 

    if (height > reqHeight || width > reqWidth) { 
     if (width > height) { 
      inSampleSize = Math.round((float)height/(float)reqHeight); 
     } else { 
      inSampleSize = Math.round((float)width/(float)reqWidth); 
     } 
    } 

    return inSampleSize; 
} 
} 

主要活動

gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
     @Override 
     public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 
      Intent i= new Intent(getApplicationContext(), FullImageActivity.class); 
      i.putExtra("id", position); 
      startActivity(i); 

     } 
    }); 

FullImageActivity

protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_full_image); 

    Intent i=getIntent(); 

    int position= i.getExtras().getInt("id"); 
    ImageAdapter imageAdapter= new ImageAdapter(this); 





    ImageView imageView=(ImageView)findViewById(R.id.imageView); 

    imageView.setImageBitmap(imageAdapter.bm); \\here I have to show my images that are read from Storage 


} 

我可以」能夠正確傳遞它，因爲我的數組列表是字符串。我嘗試了很多我知道但卻無法正常工作的方式。我也嘗試從互聯網也沒有工作。 我無法通過全圖活動顯示我的圖像。我從SD卡上讀取圖像，因此無法全屏顯示。在此先感謝

Answer 1

您的代碼未正確執行，因爲它沒有正確設置。 首先，請考慮使用Picasso或Glide或UniversalImageLoader將圖像加載到佔位符中，以避免在圖像中滾動顯示笨重的用戶體驗。其次，將位置傳遞給第二個活動並不是你的目標。你正在嘗試傳遞圖像。因此，通過圖像笑，

First on your getItem() 

你應該返回基於位置images.get（位置）個人形象

而不是返回圖像。

其次在點擊處理

無論是把它作爲一個額外的像

intent.addExtra(myAdapter.getItem(position)) 

，或者如果你有名單已經只是做

intent.addExtra(myList.get(position)) 

or simply cheat with ActivityTwo.imageToShow = myList.get(position) 
startActivityTwo 

這些人將正常工作。