如何在 textview 上显示最新的附加文本? [英] How can I show the latest append text on textview?
本文介绍了如何在 textview 上显示最新的附加文本?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
我正在开发一款聊天应用.每当我提交或接收短信时,我都会将它们附加到聊天框.当列表变长时,我需要向下滚动才能看到它们.如何让它自动滚动到新追加的文本?
I working on a chat app. Whenever I submit or receive a text message, I append them to the chatbox. When the list get longer, I need to scroll down to see them. How can I make it to autoscroll to the newly append text?
<ScrollView
android:id="@+id/scrollView01"
android:layout_width="fill_parent"
android:layout_height="100px" >
<TextView
android:id="@+id/txtChat"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text=""
/>
</ScrollView>
//
SendMsg.setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
String name = txtName.getText().toString();
String message = txtMessage.getText().toString();
if (message.length() > 0) {
sendMsg(name, message);
String myMessage = message + "\n";
tvChat.append(myMessage);
}
else
Toast.makeText(getBaseContext(),
"Please enter both name and message.", Toast.LENGTH_SHORT).show();
}
});
推荐答案
我遇到了同样的问题,这是我正在使用的:
I had the same issue, this is what I'm using:
//delay must be expressed in milliseconds. For 3 seconds, delay = 3000
private void scrollToBottom(int delay) {
// If we don't call fullScroll inside a Runnable, it doesn't scroll to
// the bottom but to the (bottom - 1)
mChatBox.postDelayed(new Runnable() {
public void run() {
mChatBox.fullScroll(ScrollView.FOCUS_DOWN);
}
}, delay);
}
mChatBox 在哪里:
where mChatBox is:
ScrollView mChatBox;
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