Android 如何仅在选中复选框时显示toast Measage？

我的

活动\u main.xml中有一个
复选框

我有以下代码：

public class UpdateService extends Service {

    @Override
    public void onCreate() {
        super.onCreate();
        IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
        filter.addAction(Intent.ACTION_SCREEN_OFF);
        BroadcastReceiver mReceiver = new ScreenReceiver();
        registerReceiver(mReceiver, filter);
    }

    @Override
    public void onStart(Intent intent, int startId) {
        boolean screenOn = intent.getBooleanExtra("screen_state", false);
        if (!screenOn) {
            Toast.makeText(getApplicationContext(), "Screen is turned ON. Broadcast Received", Toast.LENGTH_LONG).show();
            //Want to display this toast message only in checkbox is checked
        } else {
        }
    }

    @Override
    public IBinder onBind(Intent intent) {
        // TODO Auto-generated method stub
        return null;
    }
}

我只想在选中
复选框时显示
Toast
通知，否则不应显示该通知

CheckBox Chk = (CheckBox) findViewById(R.id.checkbox);
                    Chk.setOnCheckedChangeListener(new OnCheckedChangeListener() {

                        public void onCheckedChanged(CompoundButton buttonView,
                                boolean isChecked) {
                            if (isChecked) {
                             Toast.makeText(context, "Screen is turned ON. Broadcast Received", Toast.LENGTH_LONG).show();  
                            }
                        }
                    });

试试这个，在onCreate下这将很好地工作

   mSavePassword = (CheckBox) findViewById(R.id.checkBox1);

    mSavePassword.setOnClickListener(this);

在Onclick中

    @Override
  public void onClick(View view) 
   {

    switch(view.getId())
    {

    case R.id.checkBox1:

    Toast.makeText(context, "Screen is turned ON. Broadcast Received", Toast.LENGTH_LONG).show();
        break;
    }
   }

选中复选框后，将值存储在SharedReference中，然后选中此处。将您的值与存储的值进行比较。如果是，则显示toast消息。是否要访问服务中的复选框？是。我想访问中的复选框service@MissNoob请尝试我的答案。您不能这样做，因为复选框是GUI组件，仅在活动中可用。获取以下错误findViewById:类型UpdateService的方法findViewById（int）未定义。请告诉我正确的方法。我想不出来。