Android：如何从服务中获取int值并在活动的文本视图中设置

我的应用程序在他的服务中有一个24小时的倒计时。并在

TextView

中显示时间，即使用户离开应用程序

在服务时，我输入了一个整数=5184000。这是24小时转换为毫秒

问题：

public class MainActivity extends Activity {

TextView tv;
BroadcastReceiver broad;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    tv = (TextView) findViewById(R.id.textView1);

    Intent intent = new Intent(this, MyService.class);
    startService(intent);

    registerReceiver(broad, new IntentFilter(MyService.BROADCAST_ACTION));


    broad = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {

            Intent intent1 = getIntent();
            Bundle bundle = intent1.getExtras();
            if (bundle != null) {
                int data = bundle.getInt("DDDD");
                tv.setText(data);
            } else {
                tv.setText("00:00:00");
            }
        }

     };
}

public class MyService extends Service {

CountDownTimer cdt = null;
Intent intent1;
int h = 5184000;

public static final String BROADCAST_ACTION = "com.example.service";


@Override
public void onCreate() {
    super.onCreate();

}

@Override
public void onDestroy() {

    cdt.cancel();
    Log.i("DDD", "Timer cancelled");
    super.onDestroy();
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {



    Log.i("TIME", "Starting timer...");

    cdt = new CountDownTimer(h, 1000) {
        @Override
        public void onTick(long millisUntilFinished) {

            Log.i("TIME", "secondes: " + millisUntilFinished);

            intent1 = new Intent(BROADCAST_ACTION);
            intent1.putExtra("T", h);
            sendBroadcast(intent1);

        }

        @Override
        public void onFinish() {
            Log.i("TIME", "Timer finished");
        }
    };

    cdt.start();

    return super.onStartCommand(intent, flags, startId);
}

@Override
public IBinder onBind(Intent arg0) {
    return null;
 }
}

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="134dp"
    android:text="00:00:00"
    android:textAppearance="?android:attr/textAppearanceLarge" />

TextView

在

活动中不显示时间

我想知道当计时器等于00:00:00时，计时器重置，新时间等于23:59:59

main活动：

public class MainActivity extends Activity {

TextView tv;
BroadcastReceiver broad;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    tv = (TextView) findViewById(R.id.textView1);

    Intent intent = new Intent(this, MyService.class);
    startService(intent);

    registerReceiver(broad, new IntentFilter(MyService.BROADCAST_ACTION));


    broad = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {

            Intent intent1 = getIntent();
            Bundle bundle = intent1.getExtras();
            if (bundle != null) {
                int data = bundle.getInt("DDDD");
                tv.setText(data);
            } else {
                tv.setText("00:00:00");
            }
        }

     };
}

public class MyService extends Service {

CountDownTimer cdt = null;
Intent intent1;
int h = 5184000;

public static final String BROADCAST_ACTION = "com.example.service";


@Override
public void onCreate() {
    super.onCreate();

}

@Override
public void onDestroy() {

    cdt.cancel();
    Log.i("DDD", "Timer cancelled");
    super.onDestroy();
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {



    Log.i("TIME", "Starting timer...");

    cdt = new CountDownTimer(h, 1000) {
        @Override
        public void onTick(long millisUntilFinished) {

            Log.i("TIME", "secondes: " + millisUntilFinished);

            intent1 = new Intent(BROADCAST_ACTION);
            intent1.putExtra("T", h);
            sendBroadcast(intent1);

        }

        @Override
        public void onFinish() {
            Log.i("TIME", "Timer finished");
        }
    };

    cdt.start();

    return super.onStartCommand(intent, flags, startId);
}

@Override
public IBinder onBind(Intent arg0) {
    return null;
 }
}

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="134dp"
    android:text="00:00:00"
    android:textAppearance="?android:attr/textAppearanceLarge" />

服务：

public class MainActivity extends Activity {

TextView tv;
BroadcastReceiver broad;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    tv = (TextView) findViewById(R.id.textView1);

    Intent intent = new Intent(this, MyService.class);
    startService(intent);

    registerReceiver(broad, new IntentFilter(MyService.BROADCAST_ACTION));


    broad = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {

            Intent intent1 = getIntent();
            Bundle bundle = intent1.getExtras();
            if (bundle != null) {
                int data = bundle.getInt("DDDD");
                tv.setText(data);
            } else {
                tv.setText("00:00:00");
            }
        }

     };
}

public class MyService extends Service {

CountDownTimer cdt = null;
Intent intent1;
int h = 5184000;

public static final String BROADCAST_ACTION = "com.example.service";


@Override
public void onCreate() {
    super.onCreate();

}

@Override
public void onDestroy() {

    cdt.cancel();
    Log.i("DDD", "Timer cancelled");
    super.onDestroy();
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {



    Log.i("TIME", "Starting timer...");

    cdt = new CountDownTimer(h, 1000) {
        @Override
        public void onTick(long millisUntilFinished) {

            Log.i("TIME", "secondes: " + millisUntilFinished);

            intent1 = new Intent(BROADCAST_ACTION);
            intent1.putExtra("T", h);
            sendBroadcast(intent1);

        }

        @Override
        public void onFinish() {
            Log.i("TIME", "Timer finished");
        }
    };

    cdt.start();

    return super.onStartCommand(intent, flags, startId);
}

@Override
public IBinder onBind(Intent arg0) {
    return null;
 }
}

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="134dp"
    android:text="00:00:00"
    android:textAppearance="?android:attr/textAppearanceLarge" />

xml:

public class MainActivity extends Activity {

TextView tv;
BroadcastReceiver broad;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    tv = (TextView) findViewById(R.id.textView1);

    Intent intent = new Intent(this, MyService.class);
    startService(intent);

    registerReceiver(broad, new IntentFilter(MyService.BROADCAST_ACTION));


    broad = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {

            Intent intent1 = getIntent();
            Bundle bundle = intent1.getExtras();
            if (bundle != null) {
                int data = bundle.getInt("DDDD");
                tv.setText(data);
            } else {
                tv.setText("00:00:00");
            }
        }

     };
}

public class MyService extends Service {

CountDownTimer cdt = null;
Intent intent1;
int h = 5184000;

public static final String BROADCAST_ACTION = "com.example.service";


@Override
public void onCreate() {
    super.onCreate();

}

@Override
public void onDestroy() {

    cdt.cancel();
    Log.i("DDD", "Timer cancelled");
    super.onDestroy();
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {



    Log.i("TIME", "Starting timer...");

    cdt = new CountDownTimer(h, 1000) {
        @Override
        public void onTick(long millisUntilFinished) {

            Log.i("TIME", "secondes: " + millisUntilFinished);

            intent1 = new Intent(BROADCAST_ACTION);
            intent1.putExtra("T", h);
            sendBroadcast(intent1);

        }

        @Override
        public void onFinish() {
            Log.i("TIME", "Timer finished");
        }
    };

    cdt.start();

    return super.onStartCommand(intent, flags, startId);
}

@Override
public IBinder onBind(Intent arg0) {
    return null;
 }
}

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentTop="true"
    android:layout_centerHorizontal="true"
    android:layout_marginTop="134dp"
    android:text="00:00:00"
    android:textAppearance="?android:attr/textAppearanceLarge" />

---

您可以使用报警管理器进行此操作

查看AlarmManager的以下链接

---

5184000。这是24小时转换为毫秒不，它是not@njzk2你能告诉我为什么不能吗？你的广播接收器的onReceive被触发了吗？“你有没有试着在那里放一个演讲点？@Anuj不，我没有放，我不知道广播。请编辑我的代码。因为以毫秒为单位的24小时根本不是5184000。我看不出有什么好解释的