Android开发中，可以通过以下方法发送广播

public class MainActivity extends AppCompatActivity {
    public static  String Action = "com.example.yqwan.action.custom";


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

        Intent intent = new Intent();
        intent.putExtra("msg", "how old are you?");
        intent.setAction(MainActivity.Action);
        intent.setPackage("com.yqwan.broadcastreceive");
        MainActivity.this.sendBroadcast(intent);
    }
}