Android軟鍵盤與EditText近乎完美的互動
阿新 • • 發佈：2019-02-05
fastandrutlis開發框架
android使用EditText的時候總是遇到一些很不爽的問題：
無圖無真相。。
1.點選螢幕其他的任何位置，軟鍵盤不會隱藏
2.軟鍵盤會把輸入框遮蓋掉
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3.軟鍵盤會把介面頂起
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由於對鍵盤和EditText的種種不爽，就弄了一個以下東西
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一.首先要知道怎麼用程式碼控制軟鍵盤的顯示隱藏
以下是軟鍵盤顯示隱藏類 KeyBoardUtils.java
import android.app.Activity; import android.content.Context; import android.view.View; import android.view.inputmethod.InputMethodManager; import android.widget.EditText; import static android.content.Context.INPUT_METHOD_SERVICE; /** * @author laijian * @version 2017/8/29 * @Copyright (C)下午2:55 , Suntektech */ public class KeyBoardUtils { /** * 開啟軟鍵盤 * * @param mEditText * @param mContext */ public static void openKeybord(EditText mEditText, Context mContext) { InputMethodManager imm = (InputMethodManager) mContext .getSystemService(INPUT_METHOD_SERVICE); imm.showSoftInput(mEditText, InputMethodManager.RESULT_SHOWN); imm.toggleSoftInput(InputMethodManager.SHOW_FORCED, InputMethodManager.HIDE_IMPLICIT_ONLY); } /** * 關閉軟鍵盤 * * @param mEditText * @param mContext */ public static void closeKeybord(EditText mEditText, Context mContext) { InputMethodManager imm = (InputMethodManager) mContext.getSystemService(INPUT_METHOD_SERVICE); imm.hideSoftInputFromWindow(mEditText.getWindowToken(), 0); } /** * des:隱藏軟鍵盤,這種方式引數為activity * * @param activity */ public static void hideInputForce(Activity activity) { if (activity == null || activity.getCurrentFocus() == null) return; ((InputMethodManager) activity.getSystemService(INPUT_METHOD_SERVICE)) .hideSoftInputFromWindow(activity.getCurrentFocus() .getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS); } /** * 開啟鍵盤 **/ public static void showInput(Context context, View view) { InputMethodManager imm = (InputMethodManager) context.getSystemService(INPUT_METHOD_SERVICE); if (imm != null) { view.requestFocus(); imm.showSoftInput(view, 0); } } }
這個類沒什麼好說的
二.要知道軟鍵盤彈出時的高度
獲取軟鍵盤彈出的高度是為了建立一個自適應的dialog，鍵盤彈出時就會在鍵盤上方顯示一個帶EditText的dialog
以下是獲取軟鍵盤高度的類 KeyBoardHeightUtils.java
import android.app.Activity; import android.graphics.Rect; import android.os.Build; import android.view.View; import android.view.ViewTreeObserver; import android.widget.FrameLayout; /** * @author laijian * @version 2017/8/31 * @Copyright (C)上午11:11 , Suntektech */ public class KeyBoardHeightUtils { private View mChildOfContent;//activity 的佈局View private int usableHeightPrevious;//activity的View的可視高度 private KeyBoardHigthListener keyBoardHigthListener; public static KeyBoardHeightUtils setKeyBoardHeigthListener(Activity activity, KeyBoardHigthListener keyBoardHigthListener) { return new KeyBoardHeightUtils(activity, keyBoardHigthListener); } public void removeKeyboardHeightListener() { if (mChildOfContent == null) { return; } if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) { mChildOfContent.getViewTreeObserver().removeGlobalOnLayoutListener(globalLayoutListener); } else { mChildOfContent.getViewTreeObserver().removeOnGlobalLayoutListener(globalLayoutListener); } } private KeyBoardHeightUtils(final Activity activity, KeyBoardHigthListener keyBoardHigthListener) { this.keyBoardHigthListener = keyBoardHigthListener; //獲取安卓activity的最頂級控制元件 FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content);// mChildOfContent = content.getChildAt(0); //監聽檢視高度變化 mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(globalLayoutListener); //點選父控制元件隱藏軟鍵盤 mChildOfContent.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { KeyBoardUtils.hideInputForce(activity); } }); } private ViewTreeObserver.OnGlobalLayoutListener globalLayoutListener = new ViewTreeObserver.OnGlobalLayoutListener() { @Override public void onGlobalLayout() { possiblyResizeChildOfContent(); } }; private void possiblyResizeChildOfContent() { int usableHeightNow = computeUsableHeight(); if (usableHeightNow != usableHeightPrevious) { int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight(); int heightDifference = usableHeightSansKeyboard - usableHeightNow; //為了去除無謂的干擾，限制下高度 if (heightDifference > (usableHeightSansKeyboard / 4)) { keyBoardHigthListener.keyBoardHigthListener(usableHeightSansKeyboard - heightDifference, true, mChildOfContent); } else { keyBoardHigthListener.keyBoardHigthListener(usableHeightSansKeyboard, false, mChildOfContent); } usableHeightPrevious = usableHeightNow; } } //獲取控制元件在螢幕的可視高度，就是介面除去了標題欄、除去了被軟鍵盤擋住的部分，所剩下的矩形區域 private int computeUsableHeight() { Rect r = new Rect(); mChildOfContent.getWindowVisibleDisplayFrame(r); return (r.bottom - r.top); } interface KeyBoardHigthListener {//這個回撥類寫的不好，請自行修改 void keyBoardHigthListener(int heigth, boolean showKeyBoard, View contentView); } }
這程式碼也不多 也不難理解
三.要知道EditText控制元件是否被遮蓋
判斷EditText控制元件是否被遮蓋是為了彈出一個帶EditText 的 dialog 這樣就不會說EditText被覆蓋後 不知道輸入了些什麼內容
以下是檢測EditText控制元件是否被覆蓋
private boolean checkViewVisiable() { Rect localRect = new Rect(); boolean visiable = edtextVew.getLocalVisibleRect(localRect); System.out.println("visiable=" + visiable); return visiable; }
以下是判斷獲取的焦點是不是EditText
View childView = contentView.findFocus();
if (childView != null) {
if (childView instanceof EditText) {
edtextVew = (EditText) childView;
以下類就是關鍵類，判斷EditText是否被覆蓋，彈dialog等
KeyBoardUI.java
import android.app.Activity;
import android.app.Dialog;
import android.content.Context;
import android.graphics.Rect;
import android.text.Editable;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.util.DisplayMetrics;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.EditText;
import android.widget.RelativeLayout;
import android.widget.TextView;
import com.univercityapp.convergelibrary.widget.NullMenuEditText;
/**
* @author laijian
* @version 2017/8/31
* @Copyright (C)上午11:57 , Suntektech
*/
public class KeyBoardUI implements KeyBoardHeightUtils.KeyBoardHigthListener {
private EditText edtextVew;//activity的輸入框
private Activity activity;
private Dialog mDialog;
private NullMenuEditText popuEdtext;//popu的輸入框
private int screenWeight = 0;//螢幕寬度
private KeyBoardHeightUtils keyBoardHeightUtils;
public static KeyBoardUI buildKeyBoardUI(Activity activity) {
return new KeyBoardUI(activity);
}
private KeyBoardUI(Activity activity) {
this.activity = activity;
getScreen();
initDialog();
keyBoardHeightUtils = KeyBoardHeightUtils.setKeyBoardHeigthListener(activity, this);
}
private void getScreen() {
DisplayMetrics dm = new DisplayMetrics();
activity.getWindowManager().getDefaultDisplay().getMetrics(dm);
screenWeight = dm.widthPixels;
}
private void initDialog() {
LayoutInflater inflater = (LayoutInflater) activity.getBaseContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View popuView = inflater.inflate(ResourcesUtils.getLayoutResources(activity, "popuwindow"), null);
RelativeLayout populay = (RelativeLayout) popuView.findViewById(ResourcesUtils.getIdResources(activity, "popu_lay"));
popuEdtext = (NullMenuEditText) popuView.findViewById(ResourcesUtils.getIdResources(activity, "ed_text"));
mDialog = new Dialog(activity, ResourcesUtils.getStyleResources(activity, "dialog"));
mDialog.setContentView(popuView);
populay.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
KeyBoardUtils.closeKeybord(popuEdtext, activity);
mDialog.dismiss();
}
});
}
@Override
public void keyBoardHigthListener(int heigth, boolean showKeyBoard, View contentView) {
if (showKeyBoard) {
if (contentView != null) {
View childView = contentView.findFocus();
if (childView != null) {
if (childView instanceof EditText) {
edtextVew = (EditText) childView;
if (!checkViewVisiable()) {
mDialog.show();
//重新調整dialog的高度
Window dialogWindow = mDialog.getWindow();
WindowManager.LayoutParams p = dialogWindow.getAttributes(); // 獲取對話方塊當前的引數值
p.height = heigth;
p.width = screenWeight;
dialogWindow.setAttributes(p);
dialogWindow.setWindowAnimations(ResourcesUtils.getStyleResources(activity, "PopupAnimation"));
onEdChange();
KeyBoardUtils.openKeybord(edtextVew, activity);
} else {
if (mDialog != null) {
mDialog.dismiss();
}
}
}
}
}
} else {
if (mDialog != null) {
mDialog.dismiss();
}
}
}
private boolean checkViewVisiable() {
Rect localRect = new Rect();
boolean visiable = edtextVew.getLocalVisibleRect(localRect);
System.out.println("visiable=" + visiable);
return visiable;
}
private void onEdChange() {
String hintStr = "";
String text = "";
if (!TextUtils.isEmpty(edtextVew.getText())) {
text = edtextVew.getText().toString();
}
if (!TextUtils.isEmpty(edtextVew.getHint())) {
hintStr = edtextVew.getHint().toString();
}
popuEdtext.findFocus();
popuEdtext.setInputType(edtextVew.getInputType());
popuEdtext.setHint(hintStr);
popuEdtext.setText(text);
popuEdtext.setSelection(text.length());
popuEdtext.setMaxEms(edtextVew.getMaxEms());
popuEdtext.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
edtextVew.setText(s);
edtextVew.setSelection(s.length());
}
@Override
public void afterTextChanged(Editable s) {
}
});
popuEdtext.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if (actionId == 0) {
KeyBoardUtils.closeKeybord(popuEdtext, activity);
mDialog.dismiss();
return true;
}
return false;
}
});
}
public void removeKeyboardHeightListener() {
keyBoardHeightUtils.removeKeyboardHeightListener();
}
}
四.禁止EditText長按出複製貼上
NullMenuEditText.java
/**
* @author laijian
* @version 2017/8/30
* @Copyright (C)下午5:26 , Suntektech
*/
import android.content.Context;
import android.util.AttributeSet;
import android.view.ActionMode;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.EditText;
/**
* Created by jianjun.lin on 16/4/12.
*/
public class NullMenuEditText extends EditText {
boolean canPaste() {
return false;
}
boolean canCut() {
return false;
}
boolean canCopy() {
return false;
}
boolean canSelectAllText() {
return false;
}
boolean canSelectText() {
return false;
}
boolean textCanBeSelected() {
return false;
}
public NullMenuEditText(Context context, AttributeSet attrs) {
super(context, attrs);
setLongClickable(false);
setTextIsSelectable(false);
setCustomSelectionActionModeCallback(new ActionMode.Callback() {
@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
return false;
}
@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
return false;
}
@Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
return false;
}
@Override
public void onDestroyActionMode(ActionMode mode) {
}
});
}
@Override
public boolean onTextContextMenuItem(int id) {
return true;
}
}
五.相關xml資源
還有一些動畫效果資源
popup_enter.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:duration="100"
android:fromYDelta="1"
android:toYDelta="0" />
<alpha
android:duration="100"
android:fromAlpha="0.0"
android:toAlpha="1.0" />
</set>
popup_exit.xml
<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
<translate
android:duration="100"
android:fromYDelta="0"
android:toYDelta="1" />
<alpha
android:duration="100"
android:fromAlpha="1.0"
android:toAlpha="0.0" />
</set>
styles資源
<style name="PopupAnimation" mce_bogus="1" parent="android:Animation">
<item name="android:windowEnterAnimation">@anim/popup_enter</item>
<item name="android:windowExitAnimation">@anim/popup_exit</item>
</style>
<style name="dialog" parent="android:style/Theme.Dialog">
<item name="android:background">#00000000</item>
<item name="android:windowBackground">@android:color/transparent</item>
<item name="android:windowNoTitle">true</item>
<item name="android:windowIsFloating">true</item>
<item name="android:backgroundDimEnabled">false</item>
</style>
layout檔案
popuwindow.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/popu_lay"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#00000000">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:background="#ffffff"
android:orientation="vertical"
android:paddingTop="2dp">
<com.univercityapp.convergelibrary.widget.NullMenuEditText
android:id="@+id/ed_text"
android:layout_width="match_parent"
android:layout_height="36dp"
android:paddingLeft="6dp"
android:background="#ffffff"
android:gravity="center_vertical"
android:inputType="text"
android:maxLines="1"
android:scrollHorizontally="true"
android:textSize="16sp" />
</LinearLayout>
</RelativeLayout>
六.獲取R的資源utils
ResourcesUtils.java
import android.content.Context;
import android.content.res.Resources;
import java.lang.reflect.Field;
/**
* Created by laijian code on 2016-10-19.
*/
public class ResourcesUtils {
public static int getIdResources(Context context, String idName) {
Resources res = context.getResources();
return res.getIdentifier(idName, "id", context.getPackageName());
}
public static int getDrawableResources(Context context, String drawableName) {
Resources res = context.getResources();
return res.getIdentifier(drawableName, "drawable", context.getPackageName());
}
public static int getColorResources(Context context, String colorName) {
Resources res = context.getResources();
return res.getIdentifier(colorName, "color", context.getPackageName());
}
public static int getStringResources(Context context, String stringName) {
Resources res = context.getResources();
return res.getIdentifier(stringName, "string", context.getPackageName());
}
public static int getLayoutResources(Context context, String LayoutName) {
Resources res = context.getResources();
return res.getIdentifier(LayoutName, "layout", context.getPackageName());
}
public static int getAttrResources(Context context, String attrName) {
Resources res = context.getResources();
return res.getIdentifier(attrName, "attr", context.getPackageName());
}
public static int getStyleResources(Context context, String attrName) {
Resources res = context.getResources();
return res.getIdentifier(attrName, "style", context.getPackageName());
}
/**
* context.getResources().getIdentifier 無法獲取到 styleable 的資料
*
* @param name
* @return
* @paramcontext
*/
public static int getStyleable(Context context, String name) {
return ((Integer) getResourceId(context, name, "styleable")).intValue();
}
/**
* 獲取 styleable 的 ID 號陣列
*
* @param name
* @return
* @paramcontext
*/
public static int[] getStyleableArray(Context context, String name) {
return (int[]) getResourceId(context, name, "styleable");
}
/**
* 對於 context.getResources().getIdentifier 無法獲取的資料 , 或者陣列
* <p/>
* 資源反射值
*
* @param name
* @param type
* @return
* @paramcontext
*/
private static Object getResourceId(Context context, String name, String type) {
String className = context.getPackageName() + ".R";
try {
Class<?> cls = Class.forName(className);
for (Class<?> childClass : cls.getClasses()) {
String simple = childClass.getSimpleName();
if (simple.equals(type)) {
for (Field field : childClass.getFields()) {
String fieldName = field.getName();
if (fieldName.equals(name)) {
System.out.println(fieldName);
return field.get(null);
}
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
七.如何使用
使用非常簡單，在需要的activity的oncreat方法新增
KeyBoardUI.buildKeyBoardUI(this);
在AndroidManifest.xml用到上面方法的activity新增
android:windowSoftInputMode="adjustResize"