Android 监控软件盘的关闭（更好的优化IM 消息展示）

由于本人在写IM聊天案例中，在聊天界面利用RecyclerView展示消息item。为了更好的展示消息item在软件盘的打开与关闭的移动，需要对软件盘进行监听。

首先，自定义EditTextView

package cn.xie.imchat.view;

import android.content.Context;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.widget.EditText;

/**
* 拦截键盘向下的 EditTextView
*
* @author xiejinbo
* @date 2019/9/29 0029 13:44
*/
public class MyEditTextView extends EditText {

public MyEditTextView(Context context) {
super(context);
}

public MyEditTextView(Context context, AttributeSet attrs) {
super(context, attrs);
}

public MyEditTextView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}

@Override
public boolean onKeyPreIme(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_BACK && event.getAction() == 1) {
super.onKeyPreIme(keyCode, event);
onKeyBoardHideListener.onKeyHide(keyCode, event);
return false;
}
return super.onKeyPreIme(keyCode, event);
}

/**
* 键盘监听接口
*/
OnKeyBoardHideListener onKeyBoardHideListener;

public void setOnKeyBoardHideListener(OnKeyBoardHideListener onKeyBoardHideListener) {
this.onKeyBoardHideListener = onKeyBoardHideListener;
}

public interface OnKeyBoardHideListener {
void onKeyHide(int keyCode, KeyEvent event);
}
}

布局实现

<cn.xie.imchat.view.MyEditTextView
android:layout_toRightOf="@+id/input_voice"
android:layout_toLeftOf="@+id/input_emotion"
android:layout_centerVertical="true"
android:layout_marginLeft="10dp"
android:paddingLeft="5dp"
android:id="@+id/input_text"
android:layout_width="match_parent"
android:layout_height="40dp"
android:background="@drawable/round_input_bg"
android:gravity="center_vertical"
android:inputType="textNoSuggestions"/>

实际调用

//软件盘监听
inputText.setOnKeyBoardHideListener(new MyEditTextView.OnKeyBoardHideListener() {
@Override
public void onKeyHide(int keyCode, KeyEvent event) {
//是否铺满屏幕监听
recyclerView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
//铺满屏幕时
if (manager.findLastCompletelyVisibleItemPosition() < adapter.getItemCount() - 1) {
manager.setStackFromEnd(true);
recyclerView.setLayoutManager(manager);
recyclerView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
} else {
//未铺满时
manager.setStackFromEnd(false);
recyclerView.setLayoutManager(manager);
}
}
});
//滚动到最底部
if (chatMessageList.size() > 0) {
recyclerView.smoothScrollToPosition(chatMessageList.size() - 1);
}
}
});