以下是捕获返回键事件的方法:
1. 扩展editText视图以覆盖onKeyPreIme方法。
package com.test.test;
import android.content.Context;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.widget.EditText;
public class ChatEditText extends EditText
{
public ChatEditText(Context context, AttributeSet attrs)
{
super(context, attrs);
}
private KeyImeChange keyImeChangeListener;
public void setKeyImeChangeListener(KeyImeChange listener)
{
keyImeChangeListener = listener;
}
public interface KeyImeChange
{
public void onKeyIme(int keyCode, KeyEvent event);
}
@Override
public boolean onKeyPreIme(int keyCode, KeyEvent event)
{
if (keyImeChangeListener != null)
{
keyImeChangeListener.onKeyIme(keyCode, event);
}
return false;
}
}
在xml中使用的聊天输入框(ChatEditText)
<com.test.test.ChatEditText
android:id = "@+id/messageEditText"
android:layout_width = "match_parent"
android:layout_height = "wrap_content"
android:layout_gravity = "bottom"
android:layout_marginLeft = "12dp"
android:layout_marginRight = "30dp"
android:background = "@null"
android:hint = "Type your message"
android:inputType = "textMultiLine"
android:singleLine = "false"
android:textColorHint = "#c4c0bd"
android:textSize = "18sp"/>
然后将一个监听器(setKeyImeChangeListener)附加到编辑文本框上:
private ChatEditText messageEditText;
messageEditText =
(ChatEditText) findViewById(R.id.messageEditText);
messageEditText.setKeyImeChangeListener(new ChatEditText.KeyImeChange(){
@Override
public void onKeyIme(int keyCode, KeyEvent event)
{
if (KeyEvent.KEYCODE_BACK == event.getKeyCode())
{
}
}});