使用意图发送数据 [英] Using Intent to send data
本文介绍了使用意图发送数据的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我如何使用意图发送数据如字符串从活动A到b活动不留活性的?我还需要知道如何捕捉数据b活动并将其添加到一个TextView。
How can i use intent to send data such as a string from activity A to activity B without leaving activity A? I also need to know how to capture the data in activity B and add it to a textview.
推荐答案
您正在寻找的是Brodcast Reciver:
what you are looking for is Brodcast Reciver:
活性的应该发送brodcast:
activity A should send brodcast:
public class ActivityA extends Activity
{
private void sendStringToActivityB()
{
//Make sure to have started ActivityB first, otherwise B wont be listening on the receiver:
startActivity(ActivityA.this, ActivityB.class);
//Then send the data
Intent intent = new Intent("someIntentFilterName");
intent.putExtra("someKeyName", "someValue");
sendBroadcast(intent);
}
}
和b活动应该实现接收器:
and activity B should implement receiver:
public class ActivityB extends Activity
{
private TextView mTextView;
private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver()
{
@Override
public void onReceive(Context context, Intent intent)
{
String strValueRecived = intent.getStringExtra("someKeyName","defaultValue");
mTextView.setText(strValueRecived);
}
};
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
mTextView = (TextView)findViewById(R.id.textView);
registerReceiver(mBroadcastReceiver, new IntentFilter("someIntentFilterName"));
}
}
示例中未完成,但 你可以读到它的链接: http://developer.android.com/参考/安卓/内容/ BroadcastReceiver.html
the example not complete, but you can read about it on the link: http://developer.android.com/reference/android/content/BroadcastReceiver.html
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