[移动开发]Android-基础教程-receiver-接收广播-动态注册

ContextWrapper ?|? Android Developers

android.content.ContextWrapper

• Public methods
  • public Intent registerReceiver (BroadcastReceiver receiver, IntentFilter filter)
  • public Intent registerReceiver (BroadcastReceiver receiver, IntentFilter filter, int flags)
  • public Intent registerReceiver (BroadcastReceiver receiver, IntentFilter filter, String broadcastPermission, Handler scheduler, int flags)
  • public Intent registerReceiver (BroadcastReceiver receiver, IntentFilter filter, String broadcastPermission, Handler scheduler)

示例代码

MainActivity.java

package com.example.learn_recevier_context_registered;

import androidx.appcompat.app.AppCompatActivity;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        AirplanModeReceiver airplanModeReceiver = new AirplanModeReceiver();

        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction("android.intent.action.AIRPLANE_MODE");

        registerReceiver(airplanModeReceiver, intentFilter);
    }

    class AirplanModeReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            Toast.makeText(context, "飞行模式", Toast.LENGTH_SHORT).show();
        }
    }
}