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
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);
}
}
其他回答
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
如果你想从你的活动中处理IMM(虚拟)键盘窗口的显示/隐藏，你需要子类化你的布局并覆盖onMesure方法(这样你就可以确定你的布局的测量宽度和测量高度)。之后，通过setContentView()将子类布局设置为Activity的主视图。现在您将能够处理IMM显示/隐藏窗口事件。也许这听起来很复杂，但事实并非如此。代码如下:
main。xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="horizontal" >
<EditText
android:id="@+id/SearchText"
android:text=""
android:inputType="text"
android:layout_width="fill_parent"
android:layout_height="34dip"
android:singleLine="True"
/>
<Button
android:id="@+id/Search"
android:layout_width="60dip"
android:layout_height="34dip"
android:gravity = "center"
/>
</LinearLayout>
现在在布局的Activity声明子类中(main.xml)
public class MainSearchLayout extends LinearLayout {
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");
final int proposedheight = MeasureSpec.getSize(heightMeasureSpec);
final int actualHeight = getHeight();
if (actualHeight > proposedheight){
// Keyboard is shown
} else {
// Keyboard is hidden
}
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
}
您可以从代码中看到，我们在子类构造函数中为Activity扩展布局
inflater.inflate(R.layout.main, this);
现在只需设置Activity的子类布局的内容视图。
public class MainActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
MainSearchLayout searchLayout = new MainSearchLayout(this, null);
setContentView(searchLayout);
}
// rest of the Activity code and subclassed layout...
}
这可能不是最有效的解决方案。但这对我每次都有效……我调用这个函数每当我需要听软键盘。
boolean isOpened = false;
public void setListenerToRootView() {
final View activityRootView = getWindow().getDecorView().findViewById(android.R.id.content);
activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
int heightDiff = activityRootView.getRootView().getHeight() - activityRootView.getHeight();
if (heightDiff > 100) { // 99% of the time the height diff will be due to a keyboard.
Toast.makeText(getApplicationContext(), "Gotcha!!! softKeyboardup", 0).show();
if (isOpened == false) {
//Do two things, make the view top visible and the editText smaller
}
isOpened = true;
} else if (isOpened == true) {
Toast.makeText(getApplicationContext(), "softkeyborad Down!!!", 0).show();
isOpened = false;
}
}
});
}
注意: 如果用户使用浮动键盘，这种方法将导致问题。
你也可以检查第一个DecorView的子底部填充。当键盘显示时，它将被设置为非零值。
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
View view = getRootView();
if (view != null && (view = ((ViewGroup) view).getChildAt(0)) != null) {
setKeyboardVisible(view.getPaddingBottom() > 0);
}
super.onLayout(changed, left, top, right, bottom);
}
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);
}
}
推荐文章
- 模块是用不兼容的Kotlin版本编译的。其元数据的二进制版本为1.5.1，预期版本为1.1.15
- 如何在Android工作室添加“libs”文件夹?
- 使用什么api来绘制其他应用程序(如Facebook的Chat Heads)?
- getDefaultSharedPreferences和getSharedPreferences的区别
- 如何模拟按钮点击使用代码?
- Android Webview给出net::ERR_CACHE_MISS消息
- Parcelable遇到IOException写入序列化对象getactivity()
- 如何在Android中动态更改菜单项文本
- 如何将Base64字符串转换为位图图像，以显示在一个ImageView?
- 新版本的Android模拟器问题-模拟器进程已终止
- 没有与请求版本匹配的NDK版本
- 检测浏览器自动填充
- 如何将一个颜色整数转换为十六进制字符串在Android?
- 格式浮动到小数点后n位
- 移除一个onclick监听器
