Android Picasso Library NoClassDefFoundError

Question

我是Picasso库的新手，我不确定用（context）方法放入上下文参数，我尝试了这个+ getApplicationContext（）并且它失败了任何帮助都会受到赞赏

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

    ImageView iv = (ImageView) findViewById(R.id.imageView1);
    Picasso.with(this).load(R.drawable.appertizers_curly_twister_fries).into(iv);

}