如图效果
类似于QQ登入界面,软键盘弹出的时候,不遮挡登入按钮,整体的界面在软键盘之上
直接上干货
监听软键盘弹出及收起事件
步骤1。指定windowSoftInputMode =“adjustResize”
在AndroidManifest.xml中相应的Activity设置android：windowSoftInputMode =“adjustResize”，也可以在java代码中设置。
第2步。监听contentView宽高（布局）变化
使用这个帮助类
public class KeyBoardHelper {
private Activity activity;
private OnKeyBoardStatusChangeListener onKeyBoardStatusChangeListener;
private int screenHeight;
// 空白高度 = 屏幕高度 - 当前 Activity 的可见区域的高度
// 当 blankHeight 不为 0 即为软键盘高度。
private int blankHeight = 0;
public KeyBoardHelper(Activity activity) {
this.activity = activity;
screenHeight = activity.getResources().getDisplayMetrics().heightPixels;
activity.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_ADJUST_RESIZE);
if (activity.getRequestedOrientation() != ActivityInfo.SCREEN_ORIENTATION_PORTRAIT) {
activity.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
}
}
public void onCreate() {
View content = activity.findViewById(android.R.id.content);
// content.addOnLayoutChangeListener(listener); 这个方法有时会出现一些问题
content.getViewTreeObserver().addOnGlobalLayoutListener(onGlobalLayoutListener);
}
public void onDestory() {
View content = activity.findViewById(android.R.id.content);
content.getViewTreeObserver().removeOnGlobalLayoutListener(onGlobalLayoutListener);
}
private OnGlobalLayoutListener onGlobalLayoutListener = new OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
Rect rect = new Rect();
activity.getWindow().getDecorView().getWindowVisibleDisplayFrame(rect);
int newBlankheight = screenHeight - rect.bottom;
if (newBlankheight != blankHeight) {
if (newBlankheight > blankHeight) {
// keyboard pop
if (onKeyBoardStatusChangeListener != null) {
onKeyBoardStatusChangeListener.OnKeyBoardPop(newBlankheight);
}
} else { // newBlankheight < blankHeight
// keyboard close
if (onKeyBoardStatusChangeListener != null) {
onKeyBoardStatusChangeListener.OnKeyBoardClose(blankHeight);
}
}
}
blankHeight = newBlankheight;
}
};
public void setOnKeyBoardStatusChangeListener(
OnKeyBoardStatusChangeListener onKeyBoardStatusChangeListener) {
this.onKeyBoardStatusChangeListener = onKeyBoardStatusChangeListener;
}
public interface OnKeyBoardStatusChangeListener {
void OnKeyBoardPop(int keyBoardheight);
void OnKeyBoardClose(int oldKeyBoardheight);
}
}具体的实现案例
xml布局文件
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:background="@drawable/login_map"
android:focusable="false"
android:orientation="vertical">
<LinearLayout
android:id="@+id/layout_content"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="@dimen/padding_0"
android:layout_marginTop="@dimen/padding_30"
android:layout_weight="1"
android:focusable="false">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="@dimen/padding_50"
android:focusable="false"
android:src="@drawable/login_welcome" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="@dimen/padding_0"
android:layout_weight="2"
android:focusable="false"
android:gravity="center"
android:orientation="vertical">
<EditText
android:id="@+id/et_login_input"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="@dimen/padding_20"
android:background="@drawable/dialog_box"
android:hint="@string/login_input"
android:paddingBottom="@dimen/padding_15"
android:paddingLeft="@dimen/padding_20"
android:paddingTop="@dimen/padding_15"
android:singleLine="true"
android:textColor="@color/bg_white"
android:textColorHint="@color/bg_white" />
<TextView
android:id="@+id/tv_login"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_margin="@dimen/padding_20"
android:background="@drawable/login_button"
android:focusable="false"
android:gravity="center"
android:padding="@dimen/padding_15"
android:text="@string/login_text"
android:textColor="@color/bg_white"
android:textSize="@dimen/padding_20" />
</LinearLayout>
<TextView
android:id="@+id/layout_bottom"
android:layout_width="match_parent"
android:layout_height="10dp"
android:layout_alignParentBottom="true"
android:text="" />
</LinearLayout>
</RelativeLayout>效果图
主要功能的代码(我这里是在fragment里面写的查找id省略)
//关键的代码
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_login, container, false);
initView(view);
boardHelper = new KeyBoardHelper(getActivity());
boardHelper.onCreate();
boardHelper.setOnKeyBoardStatusChangeListener(onKeyBoardStatusChangeListener);
layoutBottom.post(new Runnable() {
@Override
public void run() {
bottomHeight = layoutBottom.getHeight();
}
});
return view;
}
private KeyBoardHelper.OnKeyBoardStatusChangeListener onKeyBoardStatusChangeListener = new KeyBoardHelper.OnKeyBoardStatusChangeListener() {
@Override
public void OnKeyBoardPop(int keyBoardheight) {
final int height = keyBoardheight;
if (bottomHeight > height) {
layoutBottom.setVisibility(View.GONE);
} else {
int offset = bottomHeight - height;
final ViewGroup.MarginLayoutParams lp = (ViewGroup.MarginLayoutParams) layoutContent
.getLayoutParams();
lp.topMargin = offset;
layoutContent.setLayoutParams(lp);
}
}
@Override
public void OnKeyBoardClose(int oldKeyBoardheight) {
if (View.VISIBLE != layoutBottom.getVisibility()) {
layoutBottom.setVisibility(View.VISIBLE);
}
final ViewGroup.MarginLayoutParams lp = (ViewGroup.MarginLayoutParams) layoutContent
.getLayoutParams();
if (lp.topMargin != 0) {
lp.topMargin = 0;
layoutContent.setLayoutParams(lp);
}
}
};