[英]Android Studio chronometer time through different activities
I am trying to get chronometer to maintain its time throughout different activities. 我正在尝试使天文钟在各种活动中保持其时间。 I have the chronometer in a fragment that I have at the bottom of each activity.
在每个活动的底部,我都有一个计时器。 So basically once it switches from MainActivity to Corsi I want the clock to be the same.
所以基本上,一旦它从MainActivity切换到Corsi,我希望时钟是相同的。
MainActivity 主要活动
public class MainActivity extends AppCompatActivity implements hold_undo_fragment.toggleButtonListener{
Chronometer chronometer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//runBeaconDistances();
chronometer = (Chronometer) findViewById(R.id.clock);
chronometer.setBase(SystemClock.elapsedRealtime());
chronometer.start();
}
public void toCorsi(View view){
Intent myIntent = new Intent(MainActivity.this.getBaseContext(), corsi.class);
myIntent.putExtra("time", chronometer.getBase() - SystemClock.elapsedRealtime()); // or thisSystemClock.elapsedRealtime() - chronometer.getBase() but neither works
startActivity(myIntent);
}
}
Corsi activity Corsi活动
public class corsi extends AppCompatActivity implements hold_undo_fragment.toggleButtonListener {
Chronometer chronometer;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_corsi);
Bundle timeData = getIntent().getExtras();
if (timeData == null)
return;;
long millis = timeData.getLong("time");
chronometer = (Chronometer) findViewById(R.id.clock);
chronometer.setBase(millis);
chronometer.start();
}
}
and what happens is that once I enter main activity the clock starts from 00:00 and starts counting up (like it is supposed to). 发生的事情是,一旦我进入主要活动,时钟便从00:00开始并开始计数(应该是这样)。 But once I switch to Corsi it gets the system time (27:00:..) which is not what I am trying to do.
但是一旦我切换到Corsi,它就会得到系统时间(27:00:..),这不是我要尝试的时间。 Please help, thank you.
请帮忙,谢谢。
You should start a service for this task. 您应该为此任务启动服务。 Subscribe/unsubscribe to updates from activities with a callback
通过回调订阅/取消订阅活动的更新
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