Android►setOnTouchListener

实现左右点击图片预览

#欢迎来到风的博客

###实现左右点击图片预览

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
public class MainActivity extends Activity {
	private ImageView iv;
	int img_[] = new int[] { R.drawable.img_1, R.drawable.img_2,
			R.drawable.img_3, R.drawable.img_4, R.drawable.img_5,
			R.drawable.img_6, R.drawable.img_7, R.drawable.img_8,
			R.drawable.img_9, };
	int count = 0;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		final int width = this.getWindowManager().getDefaultDisplay()
				.getWidth();
		iv = (ImageView) findViewById(R.id.imageView1);
		iv.setOnTouchListener(new View.OnTouchListener() {
			@Override
			public boolean onTouch(View v, MotionEvent event) {
				ImageView view = (ImageView) v;
				int x = (int) event.getX();
				if (x >= (width / 2)) {
					if (count == 8) {
						count = -1;
					}
					view.setImageResource(img_[++count]);
				} else {
					if (x < (width / 2)) {
						if (count == 0) {
							count = 9;
						}
						view.setImageResource(img_[--count]);
					}
				}
				return false;
			}
		});
	}
}