OnActivityResult不會使用Picasso更新ImageView

Question

使用以下代碼在ImageView查看捕獲的圖像

@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);
        }
    }

問題：如何在onActivityResult(...)刷新ImageView ，如您所見，我正在使用上面的代碼，但是總是在預覽舊圖像，而在存儲區中卻在獲取新圖像

Answer 1

您可以將代碼替換為以下代碼行：-

@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

如果要加載捕獲的圖像，則需要從數據（即Intent對象）中獲取位圖。

 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 } }