[英]how to make number running from 60 to 0 and print on textview in android studio
Runnable r = new Runnable(){
public void run(){
try{
For (int i = 60; i >= 1; i--) {
System.out.print(i + "\r");
// Let the thread sleep for a while.
Thread.sleep(1000);
TextView box2 = (TextView) findViewById(R.id.box2);
box2.setText("\r" + i + " sec left");
}
} catch (InterruptedException e) {
}
}
如何使數字從 60 運行到 0 並在 android studio 中的文本視圖上打印以及在 android studio 中的文本視圖中打印的正確方法是什么。謝謝您的幫助!
首先在 onCreate() 中初始化您的 TextView:
TextView box2 = (TextView) findViewById(R.id.box2);
然后你可以使用帶有 postDelayed() 方法的處理程序來創建一個倒數計時器:
final Handler handler = new Handler();
handler.postDelayed(new Runnable(){
public void run() {
for (int i = 60; i >= 1; i--) {
box2.setText("\r" + i + " sec left");
}
handler.postDelayed(this, 1000);
}
}, 0);
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