java - Android studio 推送通知错误

Question

我有以下编译器错误:

Annotation are not allowed here

线路错误

@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
            public void make (View view){ .. 

有什么想法吗？我正在使用 android 链接与 firebase 创建消息通知。，

package com.example.mypc.thisissample;

    import android.annotation.TargetApi;
    import android.app.Notification;
    import android.app.NotificationManager;
    import android.app.PendingIntent;
    import android.content.Intent;
    import android.os.Build;
    import android.os.Bundle;
    import android.support.v7.app.AppCompatActivity;
    import android.view.View;
    import android.widget.Button;
    import android.widget.EditText;
    import android.widget.ListView;

    import com.firebase.client.Firebase;

    public class MainActivity extends AppCompatActivity {

        private EditText editText;
        private ListView listView;


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

            Firebase.setAndroidContext(this);
            final Firebase firebase = new Firebase("https://sample.firebaseio.com/");


            editText = (EditText) findViewById(R.id.editText);
            listView = (ListView) findViewById(R.id.listView);

            listView.setAdapter(new MessageAdapter(this, Message.class, R.layout.fragment_message, firebase.child("chat")));

            Button button = (Button) findViewById(R.id.button);

            button.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Message message = new Message();

                    message.setMessage(editText.getText().toString());
                    message.setAuthor("Name");

                    firebase.child("Chat").push().setValue(message);

                    editText.setText("");
                }
            });

            @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
            public void make (View view){

                Intent intent = new Intent(this, DisplayNotification.class);
                PendingIntent pending = PendingIntent.getActivity(this, 0, intent, 0);

                Notification notifications = new Notification.Builder(this)
                        .setContentTitle("New notification like message from")
                        .setContentText("Hii").setSmallIcon(R.drawable.notification)
                        .setContentIntent(pending)
                        .addAction(R.drawable.reply, "Reply", pending)
                        .addAction(R.drawable.cancel, "cancel", pending)
                        .addAction(R.drawable.settings, "settings", pending).build();

                NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
                notifications.flags |= Notification.FLAG_AUTO_CANCEL;
                manager.notify(0, notifications);

            }

        }
    }

Answer 1

Actually the problem is not with the annotation.

您无法在另一个函数内创建一个函数。您的函数 public void make(View view) 位于 onCreate 内。因此，只需将其放在 onCreate 函数之外即可。

你不能这样做

protected void Test() {
        public void anotherFunction() {

        }
    }

你必须这样做

protected void Test() {
}

public void anotherFunction() {

}