Question

 new CountDownTimer(30000, 1000) {

 public void onTick(long millisUntilFinished) {
     mTextField.setText("seconds remaining: " + millisUntilFinished / 1000);
 }

 public void onFinish() {
     mTextField.setText("done!");
 }
 }.start();

Answer 1

如果您拥有任何Android平台jar（#include <stdio.h> #include <unistd.h> #include <stdlib.h> #include "display.h" #include "move.h" #include "place.h" #define MAX 799 #define DEAD 0 #define TRUE 1 #define FALSE 0 int main() { //initialize variables struct pos { //positions int fx[MAX]; int fy[MAX]; int tx; int ty; int jx; int jy; } pos; struct score { //scores int move; int F; int J; } score; int d,q,i,k,f,followc; int p; char *z="Number of Jujus collectd "; char *y="The number of followers "; do { score.F=score.J = score.move = 0; i=k=f=followc=0; draw_map(); place(&pos.tx,&pos.ty); sleep(1); draw_symbol(pos.tx, pos.ty, 'S'); place(&pos.jx, &pos.jy); display_score(score.move); debug_wds(5,z); debug_wds(8,y); debug_num(6,score.J); debug_num(9,score.F); while(d!=DEAD && q != 'q' && q != 'Q') { pos.fx[i]=pos.tx; //store timmy's position in follower pos.fy[i]=pos.ty; //store timmy's position in follower draw_symbol(pos.jx, pos.jy, '$'); display_score(score.move); debug_wds(5,z); debug_num(6,score.J); debug_wds(8,y); debug_num(9,score.F); q = move(&pos.tx, &pos.ty); //move timmy score.move++; draw_symbol(pos.tx,pos.ty,'S'); //update timmy's position if((pos.tx ==pos.jx)&&(pos.ty == pos.jy)) //if timmy collects a juju { score.J++; //update juju score score.F++; //update follower score display_score(score.move); place(&pos.jx,&pos.jy); followc++; //update follower count } for (f=0,k=i+1-followc; f<followc; f++,k++) //check to see if timmy is same position as followers { if(pos.tx==pos.fx[k]&&pos.ty==pos.fy[k]) { d=DEAD; } draw_symbol(pos.fx[k],pos.fy[k],'O'); //draw followers } i++; } clear_screen(); printf("Number of Jujus = %d\n", score.J); printf("Ripperoni... You really need to update your server(s)..*___*\n"); printf("Enter 1 to keep playing\n"); scanf("%d",&p); } while(p==1); }），就像在外部库中一样，您可以在班级中导入android.jar。

导入后，您可以在类中创建CountDownTimer的对象：

android.os.CountDownTimer

Answer 2

您必须导入android.os.CountDownTimer。

试试这个：

import android.os.CountDownTimer;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        .....................
        ..............................

        new CountDownTimer(30000, 1000) {

            public void onTick(long millisUntilFinished) {
                mTextField.setText("seconds remaining: " + millisUntilFinished / 1000);
            }

            public void onFinish() {
                mTextField.setText("done!");
            }
        }.start();

        .....................
        ..............................
    }
}

当我输入CountDownTimer它不接受

2 个答案: