下一张图片不会在'ImageSwitcher'中刷卡显示

Question

我对android开发非常陌生，我一直在尝试创建一个图片库应用程序。除了当我滑动显示下一个或上一个图像时，一切都工作正常，没有任何显示。我该如何解决？

public class PhotosActivity extends AppCompatActivity { 
    int int_position; 
    private GridView gridView; 
    GridViewAdapter adapter; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_image_gallery); 
     gridView = (GridView)findViewById(R.id.gv_folder); 
     int_position = getIntent().getIntExtra("value", 0); 
     adapter = new GridViewAdapter(this, al_images,int_position); 
     gridView.setAdapter(adapter); 

     gridView.setOnItemClickListener(new AdapterView.OnItemClickListener() { 
      @Override 
      public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 
       String abc = "file://" + al_images.get(int_position).getAl_imagepath().get(position); 

       Intent i = new Intent(getApplicationContext(), FullImageActivity.class); 
       i.putExtra("id", position); 
       i.putExtra("abc",abc); 
       startActivity(i); 
      } 
     }); 
    } 
} 

Answer 1

当我运行你的代码时，我得到了Nullpointerexeption。所以我用

try { 
     Intent i = getIntent(); 

     // Selected image id 
     position = i.getExtras().getInt("id"); 
     Bundle extras = getIntent().getExtras(); 
     String value = extras.getString("abc"); 

     Glide.with(FullImageActivity.this) 
       .load(value) 
       .listener(new RequestListener<String, GlideDrawable>() { 
        @Override 
        public boolean onException(Exception e, String model, Target<GlideDrawable> target, boolean isFirstResource) { 
         return false; // important to return false so the error placeholder can be placed 
        } 

        @Override 
        public boolean onResourceReady(GlideDrawable resource, String model, Target<GlideDrawable> target, boolean isFromMemoryCache, boolean isFirstResource) { 
         return false; 
        } 
       }) 

       .into(images); 
    } catch (NullPointerException n) { 
     n.printStackTrace(); 
    } 

并在5个或6挥笔我能够查看Images.As你的问题问，你是不是能看到图像，所以问题是，缩略图不exist.As在我日志为每个非可视缩略图我得到这个错误

I/System.out: resolveUri failed on bad bitmap uri: content://media/external/images/thumbnails/11

希望这可能帮助。

ps：等待烤面包完成后再下一次刷卡清理。