在ImageView的交换图片

问题描述

我一直想实现我的应用程序的简单（我认为）的事情。我认为这将是简单的，但不知何故，这是行不通的，因为我想它想。

我试图做的是：

• 有一个在中心ImageView的活动 - 它有它自己的形象（当然，还有两个）


• 我要preSS的ImageView的（也可能是ImageButton的），打开画廊/拍照与摄像头。


• 然后，取/捡照片后，我要特别强调的ImageView显示图片的缩略图。

我的布局
                   

 ＆LT; ImageView的
                    机器人：ID =@ + ID / add_photo_left
                    机器人：layout_width =WRAP_CONTENT
                    机器人：layout_height =WRAP_CONTENT
                    机器人：layout_marginRight =20dp
                    机器人：layout_weight =1
                    机器人：adjustViewBounds =真
                    机器人：SRC =@绘制/ add_photo_button/＆GT;                ＆LT; ImageView的
                    机器人：ID =@ + ID / add_photo_right
                    机器人：layout_width =0dp
                    机器人：layout_height =WRAP_CONTENT
                    机器人：layout_weight =1
                    机器人：adjustViewBounds =真
                    机器人：SRC =@绘制/ add_photo_button/＆GT;
            ＆LT; / LinearLayout中＆GT;
 

我的code - 让图片的路径之后

  BitmapFactory.Options bmpFactoryOptions =新BitmapFactory.Options（）;
        bmpFactoryOptions.inSampleSize = 8;
        位图位图= BitmapFactory.de codeFILE（/ SD卡/ 5.png，bmpFactoryOptions）;
        lastClicked.setImageBitmap（位图）;
        //lastClicked.setImageResource(R.drawable.green_circle）;
 

我想要做的是读取文件大小（用inSampleSize）从SD卡，然后用它填充的ImageView（或ImageButton的）。
但是，使用setImageBitmap功能后，该视图中消失 - 就像刚装入空的图像（注释行正常工作 - 它只是绿点）。

也许有人已经接近类似的问题？我更AP preciate任何形式的帮助。

格尔茨，
SCANA

编辑：
OFC lastClicked：

  lastClicked =（ImageView的）findViewById（R.id.add_photo_left）;
 

解决方案

为什么不试试 lastClicked.invalidate（）

我在code。至少这样做，是这样工作的;）

I've been trying to implement simple (I think) thing in my app. I thought it would be simple, but somehow it doesn't work as I would wanted it to.

What I'm trying to do is:

• There is an activity with ImageView in center - it has it's own image (well, there's two of them).
• I want to press that ImageView (or it could be ImageButton), open the gallery/take picture with camera.
• Then, after taking/picking a picture, I want to make that ImageView display the thumbnail of picture.

My layout

                <ImageView
                    android:id="@+id/add_photo_left"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginRight="20dp"
                    android:layout_weight="1"
                    android:adjustViewBounds="true"
                    android:src="@drawable/add_photo_button" />

                <ImageView
                    android:id="@+id/add_photo_right"
                    android:layout_width="0dp"
                    android:layout_height="wrap_content"
                    android:layout_weight="1"
                    android:adjustViewBounds="true"
                    android:src="@drawable/add_photo_button" />
            </LinearLayout>

My code - after getting picture path

        BitmapFactory.Options bmpFactoryOptions = new BitmapFactory.Options();
        bmpFactoryOptions.inSampleSize = 8;
        Bitmap bitmap = BitmapFactory.decodeFile("/sdcard/5.png",bmpFactoryOptions);
        lastClicked.setImageBitmap(bitmap);
        //lastClicked.setImageResource(R.drawable.green_circle);

What I wanted to do is to read the resized file (using inSampleSize) from sdcard, and then fill ImageView (or ImageButton) with it.But after using setImageBitmap function, the view disappears - like it just loaded empty image (commented line works properly - it's just green dot).

Maybe someone has approached similar problem? I would much appreciate any kind of help.

Greetz,scana

EDIT:ofc lastClicked:

lastClicked = (ImageView)findViewById(R.id.add_photo_left);

解决方案

Why don't you try lastClicked.invalidate() ?

I do so in my code at least and it works this way ;)

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