当源改变（已经使用无效）ImageView的不改变形象 [英] ImageView not changing image when source is changed (already using invalidate)

问题描述

我有一个XML格式的一套图像的ImageView的。然而，当我试图改变图像的ImageView永远不会显示第二个图像。相反，它会显示一个空白屏幕。我曾尝试code带和不带无效（）并没有改变。

  ImageView的形象;
字符串imgPath = Environment.getExternalStorageDirectory（）+/音乐/伊凡塞斯 - 唱片 -  1998-2011（320 kbps的）/专辑/ 2000原产地（限量版）（320 kbps的）/扫描覆盖/ 06.jpg@覆盖
保护无效的onCreate（捆绑savedInstanceState）{
    super.onCreate（savedInstanceState）;
    的setContentView（R.layout.activity_main）;
    图像=（ImageView的）findViewById（R.id.imageView1）;    image.setImageBitmap（BitmapFactory.de codeFILE（imgPath））;
    如果（！新文件（imgPath）.exists（））
        Log.i（AAA，文件犯规存在）;
    //从图库中选择图片
    //意图photoPickerIntent =新意图（Intent.ACTION_PICK）;
    //photoPickerIntent.setType(\"image/*）;
    // startActivityForResult（photoPickerIntent，SELECT_PHOTO）;
    Log.i（AAA，DONE IMG路径：+ imgPath）;
}
 

解决方案

我觉得像过大。

在某些设备上，而不是 java.lang.OutofMemoryError 被抛出，一个空的位图被返回。

尝试用更小的图像运行您code。如果这样的作品，你一定要学会如何显示位图在适当的Andr​​oid版

（那么你要么办法）

I have an imageView with a set image in xml. However when I try to change the image the ImageView never displays the second image. Instead it displays a blank screen. I have tried the code with and without invalidate() and there is no change.

ImageView image;
String imgPath=Environment.getExternalStorageDirectory()+"/Music/Evanescence - Discography - 1998-2011 (320 kbps)/Album's/2000 Origin (Limited Edition) (320 kbps)/Scans covers/06.jpg";

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    image=(ImageView)findViewById(R.id.imageView1);

    image.setImageBitmap(BitmapFactory.decodeFile(imgPath));
    if(!new File(imgPath).exists())
        Log.i("aaa","File doesnt exist");
    //select image from gallery
    //Intent photoPickerIntent = new Intent(Intent.ACTION_PICK);
    //photoPickerIntent.setType("image/*");
    //startActivityForResult(photoPickerIntent, SELECT_PHOTO); 
    Log.i("aaa","DONE. img path: "+imgPath);
}

解决方案

I think the image is too large.

On some devices, instead of java.lang.OutofMemoryError being thrown, a null bitmap is returned.

Try running your code with a smaller image. If that works, you have to learn how to display bitmaps properly in Android.

(Well either way you have to)

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