我想根据是否显示虚拟键盘来改变布局。我已经搜索了API和各种博客,但似乎找不到任何有用的东西。
这可能吗?
谢谢!
我想根据是否显示虚拟键盘来改变布局。我已经搜索了API和各种博客,但似乎找不到任何有用的东西。
这可能吗?
谢谢!
当前回答
基于Nebojsa Tomcic的代码,我开发了以下relativelayout子类:
import java.util.ArrayList;
import android.content.Context;
import android.util.AttributeSet;
import android.widget.RelativeLayout;
public class KeyboardDetectorRelativeLayout extends RelativeLayout {
public interface IKeyboardChanged {
void onKeyboardShown();
void onKeyboardHidden();
}
private ArrayList<IKeyboardChanged> keyboardListener = new ArrayList<IKeyboardChanged>();
public KeyboardDetectorRelativeLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public KeyboardDetectorRelativeLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
public KeyboardDetectorRelativeLayout(Context context) {
super(context);
}
public void addKeyboardStateChangedListener(IKeyboardChanged listener) {
keyboardListener.add(listener);
}
public void removeKeyboardStateChangedListener(IKeyboardChanged listener) {
keyboardListener.remove(listener);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
final int proposedheight = MeasureSpec.getSize(heightMeasureSpec);
final int actualHeight = getHeight();
if (actualHeight > proposedheight) {
notifyKeyboardShown();
} else if (actualHeight < proposedheight) {
notifyKeyboardHidden();
}
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
private void notifyKeyboardHidden() {
for (IKeyboardChanged listener : keyboardListener) {
listener.onKeyboardHidden();
}
}
private void notifyKeyboardShown() {
for (IKeyboardChanged listener : keyboardListener) {
listener.onKeyboardShown();
}
}
}
这工作得很好… 注意,当你的活动的软输入模式设置为" windowmanager . layoutparm . soft_input_adjust_resize "时,这个解决方案才会工作
其他回答
桑德,我相信你是想展示被软键盘挡住的视野。试试这个http://android-developers.blogspot.com/2009/04/updating-applications-for-on-screen.html。
隐藏|显示事件键盘可以通过简单的hack在OnGlobalLayoutListener监听:
final View activityRootView = findViewById(R.id.top_root);
activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
public void onGlobalLayout() {
int heightDiff = activityRootView.getRootView().getHeight() - activityRootView.getHeight();
if (heightDiff > 100) {
// keyboard is up
} else {
// keyboard is down
}
}
});
这里activityRootView是Activity的根视图。
尽管本页上投票最多的解决方案说,有一个setWindowInsetsAnimationCallback的ViewCompat版本一直工作到Android 21。
所以现在,这个解决方案的方法一直适用于21。
来源:https://developer.android.com/reference/androidx/core/view/ViewCompat setWindowInsetsAnimationCallback (android.view.View androidx.core.view.WindowInsetsAnimationCompat.Callback)
不确定是否有人发布这篇文章。发现这个解决方案简单易用!SoftKeyboard类在gi.github.com上。但是当键盘弹出/隐藏事件回调时,我们需要一个处理程序来正确地在UI上做事情:
/*
Somewhere else in your code
*/
RelativeLayout mainLayout = findViewById(R.layout.main_layout); // You must use your root layout
InputMethodManager im = (InputMethodManager) getSystemService(Service.INPUT_METHOD_SERVICE);
/*
Instantiate and pass a callback
*/
SoftKeyboard softKeyboard;
softKeyboard = new SoftKeyboard(mainLayout, im);
softKeyboard.setSoftKeyboardCallback(new SoftKeyboard.SoftKeyboardChanged()
{
@Override
public void onSoftKeyboardHide()
{
// Code here
new Handler(Looper.getMainLooper()).post(new Runnable() {
@Override
public void run() {
// Code here will run in UI thread
...
}
});
}
@Override
public void onSoftKeyboardShow()
{
// Code here
new Handler(Looper.getMainLooper()).post(new Runnable() {
@Override
public void run() {
// Code here will run in UI thread
...
}
});
}
});
我已经解决了单行文本视图回编码的问题。
package com.helpingdoc;
import android.content.Context;
import android.util.AttributeSet;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.LinearLayout;
public class MainSearchLayout extends LinearLayout {
int hieght = 0;
public MainSearchLayout(Context context, AttributeSet attributeSet) {
super(context, attributeSet);
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
inflater.inflate(R.layout.main, this);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
Log.d("Search Layout", "Handling Keyboard Window shown");
if(getHeight()>hieght){
hieght = getHeight();
}
final int proposedheight = MeasureSpec.getSize(heightMeasureSpec);
final int actualHeight = getHeight();
System.out.println("....hieght = "+ hieght);
System.out.println("....actualhieght = "+ actualHeight);
System.out.println("....proposedheight = "+ proposedheight);
if (actualHeight > proposedheight){
// Keyboard is shown
} else if(actualHeight<proposedheight){
// Keyboard is hidden
}
if(proposedheight == hieght){
// Keyboard is hidden
}
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}