By

文章目录

根据源码里面的，直接调用Toast.makeText()方法每次会new一个Toast，所以要使Toast不重复显示就是整个Application或者同一个界面用同一个toast，当有需要显示的直接调用setText()和show()方法，之前的显示就会被覆盖掉。如果直接用Toast.makeText().show();事实上是新new 一个Toast在显示

源码截图

解决Toast重复显示的问题

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
42
43
44
45
46
47
48
49
 public class ToastManager {
    private static ToastManager manager;
	private Context context;
	private Toast toast;

	public ToastManager() {
		init();
	}

	public static ToastManager getManager() {
		if (manager == null)
			synchronized (ToastManager.class) {
              if (manager == null)
                manager = new ToastManager();
            }	
			}
		return manager;
	}

	private void init() {
		context = AppApplication.getInstance();
		toast = Toast.makeText(context, null, Toast.LENGTH_SHORT);
	}

	public void show(int resId) {
		show(resId,Toast.LENGTH_SHORT);
	}

	public void show(String hint) {
		show(hint,Toast.LENGTH_SHORT);
	}

	public void show(int resId, int duration) {
		toast.setDuration(duration);
		toast.setText(resId);
		toast.show();
	}

	public void show(String hint, int duration) {
		toast.setDuration(duration);
		toast.setText(hint);
		toast.show();
	}
	public void onDestroy() {
		toast.cancel();
		toast = null;
		manager = null;
	}
}
文章目录