1 public class MainActivity extends AppCompatActivity {
2
3 //定义一个访问图片的数组
4 int[] images = new int[]{
5 R.drawable.one,
6 R.drawable.two,
7 R.drawable.three,
8 R.drawable.four,
9 R.drawable.five,
10 };
11 //定义默认显示的图片
12 int currentImg = 4;
13 //定义图片的初始透明度
14 private int alpha = 255;
15 @Override
16 protected void onCreate(Bundle savedInstanceState) {
17 super.onCreate(savedInstanceState);
18 setContentView(R.layout.activity_main);
19 final Button plus=(Button)findViewById(R.id.plus);
20 final Button minus=(Button)findViewById(R.id.minus);
21 final Button next=(Button)findViewById(R.id.next);
22 final ImageView image1=(ImageView)findViewById(R.id.image1);
23 final ImageView image2=(ImageView)findViewById(R.id.image2);
24 //定义查看下一张图片的监听器
25 n