大佬教程收集整理的这篇文章主要介绍了Android从java类回调一个Activity,大佬教程大佬觉得挺不错的,现在分享给大家,也给大家做个参考。
public class TESTClass{ String text = "Test"; public TESTClass(Context context){ startActivity(new Intent(context,SomeActivity.class)); } private void sendToSomeActivity(){ //Call some method of SomeActivity and pas text as String } }
当调用sendToSomeActivity()时,我想回调已经启动的SomeActivity并将一些文本传递给Activity.在SomeActivity中我想使用文本.
注意:我想要使用的TESTClass对象已在另一个类中创建.
如何才能做到这一点?
使用BroadcastReceivers在java类和活动之间进行通信.
public class SomeActivity extends Activity{ private MyBroadcastReceiver receiver; @Override protected void onCreate(Bundle savedInstanceStatE) { super.onCreate(savedInstanceStatE); receiver = new MyBroadcastReceiver(); this.registerReceiver(receiver,new IntentFilter(MyBroadcastReceiver.ACTION)); } @Override public void onDestroy() { super.onDestroy(); thiS.UnregisterReceiver(receiver); } private class MyBroadcastReceiver extends BroadcastReceiver{ public static final String ACTION = "com.example.ACTION_SOMETHING" @Override public void onReceive(Context context,Intent intent) { String test = intent.getStringExtra("dataToPass"); } } } public class TESTClass{ private String test = "TEST"; private Context context; public TESTClass(Context context){ this.context = context; } private void sendToSomeActivity(){ Intent intent = new Intent(); intent.setAction(SomeActivity.MyBroadcastReceiver.ACTION); intent.putExtra("dataToPass",test); context.sendBroadcast(intent); } }
以上是大佬教程为你收集整理的Android从java类回调一个Activity全部内容,希望文章能够帮你解决Android从java类回调一个Activity所遇到的程序开发问题。
如果觉得大佬教程网站内容还不错,欢迎将大佬教程推荐给程序员好友。
本图文内容来源于网友网络收集整理提供,作为学习参考使用,版权属于原作者。
如您有任何意见或建议可联系处理。小编QQ:384754419,请注明来意。