在Android中从Picasso下载多个图像

我正在使用Picasso库从URL下载图像.这是我对毕加索的第一次尝试

场景：我想从服务器下载一些图像并将它们存储到一个文件中.我知道如何存储到文件和检索.当我运行下面的代码时,我碰巧看到我只得到最后一张图片.看起来Picasso并行运行.我通过显示一个Toast消息来检查它.反正有没有解决这个问题？

问题：我只获得最后一个网址图片.

这是我的代码

static int  count = 0;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    for (int i = 0; i < url.length; i++)
    {

        // url is String array which has 2 urls. 
        ++count;   // Incrementing the count by 1
        Picasso.with(this).load(url[i])
        .into(new Target() {

            @Override
            public void onPrepareLoad(Drawable arg0) {
                // Todo Auto-generated method stub

            }

            @Override
            public void onBitmapLoaded(Bitmap arg0,LoadedFrom arg1) {
                // Todo Auto-generated method stub
                arg0 = Bitmap.createScaledBitmap(arg0,150,true);
                filePath = saveFile(arg0);   // I'm just calling this function to check how many times `onBitmapLoaded` is called. And it is called only once...!!
            }

            @Override
            public void onBitmapFailed(Drawable arg0) {
                // Todo Auto-generated method stub

            }
        });
    }
}

public String saveFile (Bitmap bm)
{

   Toast.makeText(getApplicationContext(),""+count,100).show(); // displaying the value of count,which always display as **2**. 
   return "";
}

解决方法

试试这种方式,希望这可以帮助您解决问题.

static int  count = 0;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    for (int i = 0; i < url.length; i++)
    {

        // url is String array which has 2 urls. 
        Picasso.with(this).load(url[i])
        .into(new Target() {

            @Override
            public void onPrepareLoad(Drawable arg0) {
                // Todo Auto-generated method stub

            }

            @Override
            public void onBitmapLoaded(Bitmap arg0,true);
                ++count; // Incrementing the count by 1
                filePath = saveFile(arg0);   // I'm just calling this function to check how many times `onBitmapLoaded` is called. And it is called only once...!!
            }

            @Override
            public void onBitmapFailed(Drawable arg0) {
                // Todo Auto-generated method stub

            }
        });
    }
}

public String saveFile (Bitmap bm)
{

   Toast.makeText(getApplicationContext(),which always display as **2**. 
   return "";
}

原文地址：https://www.jb51.cc/android/308780.html