Question

我目前正在尝试使用AlarmManger，我已经设法让它在后台运行，我也可以举杯，但我还没想到的是我应该如何在我的UI中编辑某些东西？< / p>

实施例：我有我的MainActivity，每分钟都会调用我在BroadcastReceiver中的代码并知道我想对UI进行一些更改，例如在文本中写入＆＃34; AlarmManger已经触发x次＆＃34; （X将是一个柜台）

正确地知道我的问题我怎么能让我的闹钟响起每一个让我们说10秒而不是在TIME_KICK，因为它在接收器中注册。希望你理解！

在我的情况下，有人可以帮助我吗？

我的主要活动

       package..
       imports[]


    public class MainActivity extends ActionBarActivity {


    private PendingIntent pendingIntent;
    BroadcastReceiver broadcastReceiver;


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

        AlarmReceiver lAlarmReceiver = new AlarmReceiver(this);

        Intent alarmIntent = new Intent(MainActivity.this,AlarmReceiver.class);
        pendingIntent = PendingIntent.getBroadcast(MainActivity.this,0,alarmIntent,0);
        findViewById(R.id.btnStartCounting).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                start();
            }
        });



    }

    public void start(){
        AlarmManager manager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
        int interval = 6;
        manager.setInexactRepeating(AlarmManager.RTC_WAKEUP,System.currentTimeMillis(),interval,pendingIntent);


    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }
}

My AlarmReceiver：

public class AlarmReceiver extends BroadcastReceiver{

    Context mContext;
    public AlarmReceiver(Context mContext){
        this.mContext=mContext;
    }

    @Override
    public void onReceive(Context context, Intent intent) {
        ActivityManager am = (ActivityManager)mContext.getSystemService(Context.ACTIVITY_SERVICE);
        List<ActivityManager.RunningAppProcessInfo> runningAppProcessInfo = am.getRunningAppProcesses();
    }
}

Answer 1

请用一些代码更新问题吗？

你可以做这样的事情

（您是否需要一个确切的代码来检查它被调用的次数？）

    public class MainActivity extends ActionBarActivity {

        int s= 0;

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


          checkFiredTimes();


        }
public void checkFiredTimes(){

//Code that checks how many times is AlarmManager called
//Every time it is called
s++;



Toast.makeText(this,"AlarmManager has fired "+s+" times",Toast.LENGTH_SHORT).show();


}

    }

Answer 2

您可以使用SharedPreferences执行此操作。

在您的广播接收器中，增加您的偏好：

@Override
public void onReceive(Context context, Intent intent) {
    SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
    SharedPreferences.Editor editor = sharedPreferences.edit();

    int count = sharedPreferences.getInt("count", 0) + 1;

    editor.putInt("count", count);
    editor.commit();
}

在您的活动中，设置TextView onResume()并注册OnPreferenceChangeListener进行更改onSharedPreferenceChange()：

public class MainActivity extends ActionBarActivity implements SharedPreferences.OnSharedPreferenceChangeListener {
    SharedPreferences mSharedPreferences;
    TextView mCount;

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

        mSharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
        mCount = (TextView) findViewById(R.id.count);
    }

    @Override
    protected void onResume() {
        super.onResume();
        mSharedPreferences.registerOnSharedPreferenceChangeListener(this);
        mCount.setText(Integer.toString(mSharedPreferences.getInt("count", 0)));
    }

    @Override
    protected void onPause() {
        super.onPause();
        mSharedPreferences.unregisterOnSharedPreferenceChangeListener(this);
    }

    @Override
    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
        if(key.equals("count")){
            mCount.setText(Integer.toString(mSharedPreferences.getInt("count", 0)));
        }
    }
}

更新当前使用的应用

2 个答案: