毕加索图片在android中加载速度慢,为什么？

Question

来自毕加索图书馆的图像在点击几下后非常缓慢地加载到模拟器中.他们为什么加载这么慢？我需要做些什么才能让它们加载更快.我用png文件和jpg尝试了它.

Java代码

 private int a;
 ImageView ivImageFromUrl;


 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    ivImageFromUrl=(ImageView)findViewById(R.id.iv_image_from_url);

}

 public void buttonOnClick(View v)  {
    // do something when the button is clicked
    Button button = (Button) v;

    a = (byte) (Math.random() * 5);

    switch (a) {
        case 1:
            Picasso.with(getApplicationContext()).load("http://icons.iconarchive.com/icons/crountch/one-piece-jolly-roger/72/Luffys-flag-2-icon.png").into(ivImageFromUrl);
          break;
        case 2:
            Picasso.with(getApplicationContext()).load("http://i40.tinypic.com/2i8xait.jpg").into(ivImageFromUrl);
            break;
        case 3:
            Picasso.with(getApplicationContext()).load("http://i41.tinypic.com/2i8xahh.jpg").into(ivImageFromUrl);
            break;
        case 4:
            Picasso.with(getApplicationContext()).load("http://i42.tinypic.com/2i8xahk.jpg").into(ivImageFromUrl);
            break;
        case 5:
            Picasso.with(getApplicationContext()).load("http://i40.tinypic.com/2i8xagp.jpg").into(ivImageFromUrl);
            break;
    }
}
}

XML

  <TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Hello World!"
    android:id="@+id/textView2" />

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Image text"
    android:id="@+id/textView"
    android:layout_below="@+id/textView2"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="82dp" />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Image"
    android:id="@+id/button"
    android:onClick="buttonOnClick"
    android:layout_below="@+id/textView"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="41dp" />

<ImageView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/iv_image_from_url"
    android:layout_alignParentBottom="true"
    android:layout_alignRight="@+id/textView"
    android:layout_alignEnd="@+id/textView"
    android:layout_marginBottom="106dp" />

Answer 1

如果您的图像太大,则可能需要一些时间.

如果您需要显示配置文件图片,其布局尺寸为350x350,那么为什么要加载完整图像.根据您的要求重新调整图像大小.

Picasso.with(getApplicationContext()).load(filePath).resize(400,400).centerCrop().into(imageView);