Question

我想在取消选中CheckBox时将我的通知方法设置为false，但我的代码不起作用。我不熟悉Android上的通知，但我对Android和Java有点熟悉。谢谢您的帮助。（不得不像StackOverflow要求的那样添加细节）

这是我的代码：

package com.arvisapps.lazyscreenshot;

import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.os.Bundle;
import android.support.v4.app.NotificationCompat;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.CheckBox;
import android.widget.CompoundButton;


public class MainActivity extends Activity {


NotificationCompat.Builder builder = new NotificationCompat.Builder(this);

private void showNotification() {
    builder.setAutoCancel(false);
    builder.setContentTitle("Take Screenshot");
    builder.setContentText("");
    builder.setSmallIcon(R.drawable.ic_notification);
    builder.setOngoing(true);

    Notification notification = builder.build();
    NotificationManager manager = (NotificationManager) this.getSystemService(NOTIFICATION_SERVICE);
    manager.notify(1, notification);
}

private void dontShowNotification(){
    builder.setOngoing(false);
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    CheckBox cb1 = (CheckBox) findViewById(R.id.cb_1);

    cb1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

            if (isChecked == true) {
                showNotification();
            }

            else if(isChecked == false)
            {
                dontShowNotification();
            }
        }
    });
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();

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

    return super.onOptionsItemSelected(item);
}


}

Answer 1

执行此操作以清除过去的通知

NotificationManager nMgr = (NotificationManager) this.getSystemService(NOTIFICATION_SERVICE);
nMgr.cancel(notifyId); <-----this integer needs to be the same as the one shown.

只需运行相同的语句，但使用false。如果使用相同的整数，它将替换旧通知。

private void dontShowNotification(){
    builder.setOngoing(false);
    builder.setAutoCancel(false);
    builder.setContentTitle("Take Screenshot");
    builder.setContentText("");
    builder.setSmallIcon(R.drawable.ic_notification);
    Notification notification = builder.build();
    NotificationManager manager = (NotificationManager) this.getSystemService(NOTIFICATION_SERVICE);
    manager.notify(1, notification);
}

更好的方式

private void showNotification(boolean b) {
    builder.setAutoCancel(false);
    builder.setContentTitle("Take Screenshot");
    builder.setContentText("");
    builder.setSmallIcon(R.drawable.ic_notification);
    builder.setOngoing(b);

    Notification notification = builder.build();
    NotificationManager manager = (NotificationManager) this.getSystemService(NOTIFICATION_SERVICE);
    manager.notify(1, notification);
}

@Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    CheckBox cb1 = (CheckBox) findViewById(R.id.cb_1);

    cb1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            showNotification(isChecked);
        }
    }
});
}

如果取消选中CheckBox，如何setOnGoing（false）？

1 个答案: