我有两个XML的edittext。在一个EditText中,用户可以将一个数字作为分钟,在另一个EditText中,将一个数字作为秒。单击finish按钮后,秒EditText应该开始倒计时,并每秒钟更新一次文本。
此外,我如何才能保持它的更新,直到它达到零分零秒?
我有两个XML的edittext。在一个EditText中,用户可以将一个数字作为分钟,在另一个EditText中,将一个数字作为秒。单击finish按钮后,秒EditText应该开始倒计时,并每秒钟更新一次文本。
此外,我如何才能保持它的更新,直到它达到零分零秒?
当前回答
// the count down timer
new CountDownTimer(30000, 1000)
{
@Override
public void onTick(long l) {
}
@Override
public void onFinish() {
//on finish the count down timer finsih
}
}
}
}.start();
其他回答
如果您使用以下代码(如已接受的答案所述),
new CountDownTimer(30000, 1000) {
public void onTick(long millisUntilFinished) {
mTextField.setText("seconds remaining: " + millisUntilFinished / 1000);
//here you can have your logic to set text to edittext
}
public void onFinish() {
mTextField.setText("done!");
}
}.start();
如果不仔细清理引用,将导致使用此代码的活动实例的内存泄漏。
使用以下代码
//Declare timer
CountDownTimer cTimer = null;
//start timer function
void startTimer() {
cTimer = new CountDownTimer(30000, 1000) {
public void onTick(long millisUntilFinished) {
}
public void onFinish() {
}
};
cTimer.start();
}
//cancel timer
void cancelTimer() {
if(cTimer!=null)
cTimer.cancel();
}
你需要调用cTtimer.cancel()每当onDestroy()/onDestroyView()在拥有的活动/片段被调用。
只需复制粘贴以下代码........
MainActivity
包com.example.countdowntimer;
import java.util.concurrent.TimeUnit;
import android.app.Activity;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.widget.TextView;
public class MainActivity extends Activity {
TextView text1;
private static final String FORMAT = "%02d:%02d:%02d";
int seconds , minutes;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
text1=(TextView)findViewById(R.id.textView1);
new CountDownTimer(16069000, 1000) { // adjust the milli seconds here
public void onTick(long millisUntilFinished) {
text1.setText(""+String.format(FORMAT,
TimeUnit.MILLISECONDS.toHours(millisUntilFinished),
TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished) - TimeUnit.HOURS.toMinutes(
TimeUnit.MILLISECONDS.toHours(millisUntilFinished)),
TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished) - TimeUnit.MINUTES.toSeconds(
TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished))));
}
public void onFinish() {
text1.setText("done!");
}
}.start();
}
}
activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:layout_marginLeft="34dp"
android:layout_marginTop="58dp"
android:text="Large Text"
android:textAppearance="?android:attr/textAppearanceMedium" />
</RelativeLayout>
接口方式。
import android.os.CountDownTimer;
/**
* Created by saikiran on 07-03-2016.
*/
public class CountDownTimerCustom extends CountDownTimer {
private TimeTickListener mTickListener;
private TimeFinishListener mFinishListener;
private long millisUntilFinished;
public CountDownTimerCustom(long millisInFuture, long countDownInterval) {
super(millisInFuture, countDownInterval);
}
public void updateTickAndFinishListener(TimeTickListener tickListener) {
mTickListener = tickListener;
}
public void updateFinishListner(TimeFinishListener listener) {
mFinishListener = listener;
}
public long getCurrentMs() {
return millisUntilFinished;
}
public int getCurrentSec() {
return (int) millisUntilFinished / 1000;
}
@Override
public void onTick(long millisUntilFinished) {
this.millisUntilFinished = millisUntilFinished;
if (mTickListener != null)
mTickListener.onTick(millisUntilFinished);
}
@Override
public void onFinish() {
if (mTickListener != null)
mTickListener.onFinished();
mFinishListener.onFinished();
}
public interface TimeTickListener {
void onTick(long mMillisUntilFinished);
void onFinished();
}
public interface TimeFinishListener {
void onFinished();
}
}
试试这个方法:
private void startTimer() {
startTimer = new CountDownTimer(30000, 1000) {
public void onTick(long millisUntilFinished) {
long sec = (TimeUnit.MILLISECONDS.toSeconds(millisUntilFinished) -
TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millisUntilFinished)));
Log.e(TAG, "onTick: "+sec );
tv_timer.setText(String.format("( %02d SEC )", sec));
if(sec == 1)
{
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
tv_timer.setText("( 00 SEC )");
}
}, 1000);
}
}
public void onFinish() {
tv_timer.setText("Timer finish");
}
}.start();
}
输出:01:30
new CountDownTimer(90000, 1000) {
public void onTick(long duration) {
//tTimer.setText("seconds remaining: " + millisUntilFinished / 1000);
//here you can have your logic to set text to edittext resource id
// Duration
long Mmin = (duration / 1000) / 60;
long Ssec = (duration / 1000) % 60;
if (Ssec < 10) {
tTimer.setText("" + Mmin + ":0" + Ssec);
} else tTimer.setText("" + Mmin + ":" + Ssec);
}
public void onFinish() {
tTimer.setText("00:00");
}
}.start();