Android自定义Toast，多次弹出时取消上次弹出，最后一次弹出为准，androidtoast,Android的Toas

Android自定义Toast，多次弹出时取消上次弹出，最后一次弹出为准，androidtoast,Android的Toas

Android的Toast用队列管理弹出的消息，这个自定义的Toast用于频繁弹出Toast时取消之前的toast，只显示最后一个Toast，前后文字长度相差较大时，两个Toast提示的切换不太理想，大神们有啥建议还望不吝赐教。```java

public abstract class Toast { public static final int LENGTH_SHORT = android.widget.Toast.LENGTH_SHORT; public static final int LENGTH_LONG = android.widget.Toast.LENGTH_LONG;

private static android.widget.Toast toast;private static Handler handler = new Handler();private static Runnable run = new Runnable() {    public void run() {        toast.cancel();    }};private static void toast(Context ctx, CharSequence msg, int duration) {    handler.removeCallbacks(run);    // handler的duration不能直接对应Toast的常量时长，在此针对Toast的常量相应定义时长    switch (duration) {    case LENGTH_SHORT:// Toast.LENGTH_SHORT值为0，对应的持续时间大概为1s        duration = 1000;        break;    case LENGTH_LONG:// Toast.LENGTH_LONG值为1，对应的持续时间大概为3s        duration = 3000;        break;    default:        break;    }    if (null != toast) {        toast.setText(msg);    } else {        toast = android.widget.Toast.makeText(ctx, msg, duration);    }    handler.postDelayed(run, duration);    toast.show();}/** * 弹出Toast *  * @param ctx *            弹出Toast的上下文 * @param msg *            弹出Toast的内容 * @param duration *            弹出Toast的持续时间 */public static void show(Context ctx, CharSequence msg, int duration)        throws NullPointerException {    if (null == ctx) {        throw new NullPointerException("The ctx is null!");    }    if (0 > duration) {        duration = LENGTH_SHORT;    }    toast(ctx, msg, duration);}/** * 弹出Toast *  * @param ctx *            弹出Toast的上下文 * @param msg *            弹出Toast的内容的资源ID * @param duration *            弹出Toast的持续时间 */public static void show(Context ctx, int resId, int duration)        throws NullPointerException {    if (null == ctx) {        throw new NullPointerException("The ctx is null!");    }    if (0 > duration) {        duration = LENGTH_SHORT;    }    toast(ctx, ctx.getResources().getString(resId), duration);}

}

```