在Android中将图像存储在图像数组列表中

Question

如何将从服务器检索到的图像存储在位图的数组列表中？ 我试过了，但是数组列表显示空值。

以下代码从服务器获取图像：-

ParseQuery<ParseObject> imgquery = new ParseQuery<ParseObject>("ChatRecords");
imgquery.getInBackground(ChatRecordObjectID, new GetCallback<ParseObject>() 
{							
	@Override
	public void done(ParseObject object,ParseException e) 
	{
		System.out.println("in 2nd done:"+time2);	
		ParseFile fileObject = (ParseFile) object.get("ImageMessage");
				fileObject.getDataInBackground(new GetDataCallback() 
				{
					@Override
					public void done(byte[] data, ParseException e)
					{
						if (e == null) 
						{
						bmp= BitmapFactory.decodeByteArray(data, 0,data.length);
						imageBitmap.add(bmp);
						}
						else 
						{
					Log.d("test","There was a problem downloading the data.");					}
			}
		});
	}
});

Following Code to retrieve image in array list :-

for(int i=0;i<imageBitmap.size();i++)
{
	ImageView imageView = new ImageView(CurrentUserActivity.this);
	imageView.setBackgroundResource(R.drawable.msgrecv);
	imageView.setAdjustViewBounds(true);
	imageView.setMaxHeight(150);
	imageView.setMaxWidth(inScrollViewLeft.getLayoutParams().width);
	imageView.requestLayout();
	imageView.setImageBitmap(imageBitmap.get(i));
	inScrollViewLeft.addView(imageView);
	} 

错误是：

04-28 09:57:08.280: E/AndroidRuntime(2769): java.lang.IndexOutOfBoundsException: Invalid index 0, size is 0
04-28 09:57:08.280: E/AndroidRuntime(2769): at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)

Answer 1

将您的位图对象添加到ArratList 例如

ArrayList<Bitmap> images = new ArrayList<>();
images.add(downlaodedBitmap);

Answer 2

我在上面的代码中做了以下更改，有时图像是按顺序设置的，有时不是。请检查代码并告诉我更改：

public void searchChatRecord()
	{
		k=0;
				
		ParseQuery<ParseObject> pq = ParseQuery.getQuery("ChatRecords");
		pq.whereNotEqualTo("objectId", null);
		pq.orderByAscending("createdAt");
		pq.findInBackground(new FindCallback<ParseObject>() {

		@Override
		public void done(List<ParseObject> chatObjects, ParseException e) {
				
			if(e == null)
			{	
				if(chatObjects.size()>0)
				{	
				System.out.println("chatObjects.size() : "+chatObjects.size());
					for(int i =0;i<chatObjects.size();i++)
					{	
						k++;
						if(chatObjects.get(i).getString("SenderObjectID").equals(currentUser.getObjectId()) && chatObjects.get(i).getString("RecieverObjectID").equals(recieverObjectID))
						{
							addImg.add("S2R");
							ChatRecordObjectID = chatObjects.get(i).getObjectId();
							chatID.add(ChatRecordObjectID);
							time1=chatObjects.get(i).getString("date_time");	// ..po.getString("date_time");				
							System.out.println("in 1st :"+time1);
							time.add(time1);
						}
						else 
						if(chatObjects.get(i).getString("SenderObjectID").equals(recieverObjectID) && chatObjects.get(i).getString("RecieverObjectID").equals(currentUser.getObjectId()))
						{
							addImg.add("R2S");
							ChatRecordObjectID =chatObjects.get(i).getObjectId();
							chatID.add(ChatRecordObjectID);
							time2= chatObjects.get(i).getString("date_time");
							time.add(time2);
							System.out.println("in 2nd :"+time2);								
							
						}
					
								
					if(k==chatObjects.size())
					{
						System.out.println(k);
						for(int j=0;j<addImg.size();j++)
						{
							
							if(addImg.get(j).equals("S2R"))
							{
								userToReciever(chatID.get(j), time.get(j));
							}
							else
							if(addImg.get(j).equals("R2S"))
							{
								recieverToUser(chatID.get(j), time.get(j));
							}
						}
					}
				}
				}
				else
				{
					Toast.makeText(getApplicationContext(), "No chat records", Toast.LENGTH_SHORT).show();
				}
			}
		}
	});
	} 
	
	public void userToReciever(String id,final String msgTime)
	{
		ParseQuery<ParseObject> imgquery = new ParseQuery<ParseObject>("ChatRecords");
		imgquery.getInBackground(id, new GetCallback<ParseObject>() 
		{
			@Override
			public void done(ParseObject object,ParseException e) 
			{
				System.out.println("in 1st done:"+msgTime);	
				ParseFile fileObject = (ParseFile) object.get("ImageMessage");
				fileObject.getDataInBackground(new GetDataCallback() 
				{
					@Override
					public void done(byte[] data, ParseException e)
					{
						if (e == null) 
						{
							Log.d("test","We've got data in data.");
							bmp= BitmapFactory.decodeByteArray(data, 0,data.length);
																			
							TextView t = new TextView(CurrentUserActivity.this);
							t.setPadding(10,50, 0, 2);
							t.setText("me"+"   "+msgTime);
							ImageView imageView = new ImageView(CurrentUserActivity.this);
							imageView.setBackgroundResource(R.drawable.shape);
							imageView.setAdjustViewBounds(true);
							imageView.setMaxHeight(150);
							imageView.setMaxWidth(inScrollViewLeft.getLayoutParams().width);
							imageView.requestLayout();
							imageView.setImageBitmap(bmp);
							inScrollViewLeft.addView(t);
							inScrollViewLeft.addView(imageView);
							
						}
						else 
						{
								Log.d("test","There was a problem downloading the data.");
						}
					}
				});
			}
				
		});
	}
	
	
	public void recieverToUser(String id,final String msgTime) {
		
		ParseQuery<ParseObject> imgquery = new ParseQuery<ParseObject>("ChatRecords");
		imgquery.getInBackground(id, new GetCallback<ParseObject>() 
		{
			@Override
			public void done(ParseObject object,ParseException e) 
			{
				System.out.println("in 2nd done:"+msgTime);	
				ParseFile fileObject = (ParseFile) object.get("ImageMessage");
				fileObject.getDataInBackground(new GetDataCallback() 
				{
					@Override
					public void done(byte[] data, ParseException e)
					{
						if (e == null) 
						{
						Log.d("test","We've got data in data.");
						bmp= BitmapFactory.decodeByteArray(data, 0,data.length);
																		
							TextView t = new TextView(CurrentUserActivity.this);
							t.setPadding(10,50, 0, 2);
							t.setText("me"+"   "+msgTime);
							ImageView imageView = new ImageView(CurrentUserActivity.this);
							imageView.setBackgroundResource(R.drawable.msgrecv);
							imageView.setAdjustViewBounds(true);
							imageView.setMaxHeight(150);
							imageView.setMaxWidth(inScrollViewLeft.getLayoutParams().width);
							imageView.requestLayout();
							imageView.setImageBitmap(bmp);
							inScrollViewLeft.addView(t);
							inScrollViewLeft.addView(imageView);
							
						}
						else 
						{
								Log.d("test","There was a problem downloading the data.");
						}
					}
				});
			}
				
		});
		
	}