我正在做一个需要倒数计时器来限制时间为1小时的项目。 我已对此进行了编码，但每次刷新活动时，倒数计时器都会从开始时开始。 我该怎么办。
这是我的代码
new CountDownTimer(3600000, 1000) {
@Override
public void onTick(long millisUntilFinished) {
long millis = millisUntilFinished;
mTimer.setText("" + String.format("%02d:%02d:%02d", TimeUnit.MILLISECONDS.toHours(millis),
TimeUnit.MILLISECONDS.toMinutes(millis) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millis)),
TimeUnit.MILLISECONDS.toSeconds(millis) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis))));
}
@Override
public void onFinish() {
mTimer.setText("");
unlock();
mStatus.setTextColor(Color.parseColor("#f9d540"));
}
}.start();
谢谢：）
这些是我的活动代码。我试过在AsyncTask中做这件事（只是//等待）
String ipParse;
long CountTimer;
TextView mName,mUsername,mLicense,mLot,mStatus, mDate, mPayment, mTel,mTimer,mconfirm;
ImageView imageView,Ask;
Button unlock, layout, logout;
private String login_name, user_license, lot_lot;
private IPManager ipManager;
private LoginManager loginManager;
AlertDialog alertDialog;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
loginManager = new LoginManager(this);
ipManager = new IPManager(this);
ipParse = ipManager.Read_ip();
login_name = getIntent().getStringExtra("username");
user_license = getIntent().getStringExtra("license");
lot_lot = getIntent().getStringExtra("lot");
mName = (TextView) findViewById(R.id.name);
mUsername = (TextView) findViewById(R.id.user_username);
mLicense = (TextView) findViewById(R.id.license_user);
mLot = (TextView) findViewById(R.id.yourlot);
mStatus = (TextView) findViewById(R.id.status_parking);
mDate = (TextView) findViewById(R.id.date);
mPayment = (TextView) findViewById(R.id.payment);
mTel = (TextView) findViewById(R.id.tel);
mTimer = (TextView) findViewById(R.id.Timer);
mconfirm = (TextView) findViewById(R.id.confirmation);
imageView = (ImageView) findViewById(R.id.pic_parking);
Ask = (ImageView) findViewById(R.id.pic_Ask);
unlock = (Button) findViewById(R.id.button_unlock);
layout = (Button) findViewById(R.id.layout_building);
logout = (Button) findViewById(R.id.log_out);
unlock.setVisibility(View.GONE);
PostFunction postM =new PostFunction();
//Check Status
try {
String resp = postM.postCheck2a(ipParse, user_license, lot_lot);
JSONObject object = new JSONObject();
try {
object = new JSONObject(resp);
int status = object.getInt("status");
int status_2a = object.getInt("status_2a");
//waiting
if (status == 0 && status_2a == 1){
unlock.setVisibility(View.VISIBLE);
Ask.setVisibility(View.GONE);
mconfirm.setText("time for confirmation");
mStatus.setTextColor(Color.parseColor("#20b2aa"));
new UpdateCountdownTask().execute();
}
//wrong lot!!!!
else if (status == 0 && status_2a == 2){
unlock.setVisibility(View.VISIBLE);
Ask.setVisibility(View.GONE);
alertDialog = new AlertDialog.Builder(this).create();
alertDialog.setTitle(" Smart Parking");
alertDialog.setMessage(" Wrong lot!! please go to your lot....");
alertDialog.show();
TextView textView = (TextView) alertDialog.findViewById(android.R.id.message);
textView.setTextSize(25);
textView.setTextColor(Color.RED);
mStatus.setTextColor(Color.RED);
Ask.setVisibility(View.GONE);
}
//Parking
else if (status == 0 && status_2a == 3){
unlock.setVisibility(View.VISIBLE);
Ask.setVisibility(View.GONE);
mStatus.setTextColor(Color.parseColor("#0dce5e"));
}
// getting out
else if (status == 0 && status_2a == 4){
mStatus.setTextColor(Color.parseColor("#f9d540"));
}
else if (status == 1) {
Toast.makeText(MainActivity.this, "Sorry the connection failed......" , Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
e.printStackTrace();
}
} catch (IOException e) {
e.printStackTrace();
}
//show User info
try {
String resp = postM.postMain(ipParse,login_name);
JSONObject object = new JSONObject();
try {
object = new JSONObject(resp);
int status = object.getInt("status");
if (status == 0) {
mName.setText(object.getString ("name"));
mUsername.setText(object.getString("username"));
mLicense.setText(object.getString("license"));
mLot.setText(object.getString("lot"));
mStatus.setText(object.getString("user_status"));
mDate.setText(object.getString("date"));
mPayment.setText(object.getString("payment"));
mTel.setText(object.getString("tel"));
} else if (status == 1) {
Toast.makeText(MainActivity.this, "Sorry something wrong..." , Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
e.printStackTrace();
}
} catch (IOException e) {
e.printStackTrace();
}
imageView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = getIntent();
finish();
startActivity(intent);
}
});
Ask.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, AskFloor.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.putExtra("username", login_name);
intent.putExtra("license", user_license);
intent.putExtra("lot", lot_lot);
startActivity(intent);
}
});
layout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this, Layout.class);
startActivity(intent);
}
});
logout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
loginManager.remove_ExistLogin();
Intent intent = new Intent(MainActivity.this, LoginActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
finish();
}
});
unlock.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
unlock();
}
});
}
public void unlock(){
PostFunction postM =new PostFunction();
try {
String resp = postM.postUnlock(ipParse ,login_name, user_license);
JSONObject object = new JSONObject();
try {
object = new JSONObject(resp);
int status = object.getInt("status");
if (status == 0) {
Toast.makeText(MainActivity.this, "UNLOCKED! thank you for coming......", Toast.LENGTH_LONG).show();
Intent intent = getIntent();
startActivity(intent);
finish();
} else if (status == 1) {
Toast.makeText(MainActivity.this, "UNLOCK FAILED...", Toast.LENGTH_LONG).show();
}
} catch (JSONException e) {
e.printStackTrace();
}
} catch (IOException e) {
e.printStackTrace();
}
}
private class UpdateCountdownTask extends AsyncTask<Long, Long, Void> {
@Override
protected Void doInBackground(Long... millisUntilFinished) {
CountDownTimer myCounter = new CountDownTimer(3600000, 1000) {
@Override
public void onTick(long millisUntilFinished) {
publishProgress(millisUntilFinished);
}
@Override
public void onFinish() {
mTimer.setText("");
unlock();
mStatus.setTextColor(Color.parseColor("#f9d540"));
}
};
myCounter.start();
return null;
}
@Override
protected void onProgressUpdate(Long... millisUntilFinished) {
super.onProgressUpdate(millisUntilFinished);
long millis = millisUntilFinished[0];
mTimer.setText("" + String.format("%02d:%02d:%02d", TimeUnit.MILLISECONDS.toHours(millis),
TimeUnit.MILLISECONDS.toMinutes(millis) - TimeUnit.HOURS.toMinutes(TimeUnit.MILLISECONDS.toHours(millis)),
TimeUnit.MILLISECONDS.toSeconds(millis) - TimeUnit.MINUTES.toSeconds(TimeUnit.MILLISECONDS.toMinutes(millis))));
}
protected void onPostExecute(Void result) {
super.onPostExecute(result);
mTimer.setText("");
}
}
}
答案 0 :(得分：0)
创建CountDown计时器： 使用静态变量，以便在Activity再次加载时不会启动：
static long v1=60000;
static long v2=1000;
new CountDownTimer(v1, v2) {
public void onTick(long millisUntilFinished) {
/*for one second*/
textViewFacebook.setText("seconds remaining: " + millisUntilFinished / v2);
//here you can have your logic to set text to edittext
}
public void onFinish() {
textViewFacebook.setText("done!");
}
}.start();
只需将此代码放入AsyncTask backgroud事件中即可在后台运行。