OnActivityResult 不会使用 Picasso 更新 ImageView

Question

使用以下代码查看ImageView 中捕获的图像

@Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if(this.requestCode == requestCode && resultCode == RESULT_OK) {  
            File imageFile = new File(Environment.getExternalStorageDirectory() + "/img.jpeg");             
            Picasso.with(MainActivity.this).load(imageFile).into(imageView);
        }
    }

问题：我如何在onActivityResult(...)中刷新ImageView，正如你所看到的，我使用上面的代码，但总是得到旧图像的预览，而我在存储中得到新图像

Answer 1

您可以将代码替换为以下代码行：-

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if(this.requestCode == requestCode && resultCode == RESULT_OK) {  
        File imageFile = new   File(Environment.getExternalStorageDirectory() + "/img.jpeg");             
        Picasso.with(MainActivity.this)
        .load(imageFile)
        .memoryPolicy(MemoryPolicy.NO_CACHE)
        .networkPolicy(NetworkPolicy.NO_CACHE)
        .error(R.drawable.ic_lanucher)
        .noFade()
        .into(imageView)
    }
}

Answer 2

如果要加载捕获的图像，则需要从数据（即Intent对象）中获取位图。

if (responseCode == RESULT_OK && data != null) {
			Bitmap bitmap = (Bitmap) data.getExtras().get("data");
			if (bitmap != null) {
				
			// Here you will get bitmap , set bitmap in imageview
			}
		}