android自定义密码键盘

时间:2022-04-24
本文章向大家介绍android自定义密码键盘，主要内容包括其使用实例、应用技巧、基本知识点总结和需要注意事项，具有一定的参考价值，需要的朋友可以参考一下。

先看界面布局文件

<?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="vertical" > 
 
 <EditText 
 android:id="@+id/edit" 
 android:layout_width="fill_parent" 
 android:layout_height="wrap_content" /> 
 
 <EditText 
 android:id="@+id/edit1" 
 android:layout_width="fill_parent" 
 android:layout_height="wrap_content" 
 android:password="true" /> 
 
 <RelativeLayout 
 android:layout_width="fill_parent" 
 android:layout_height="wrap_content" > 
 
 <android.inputmethodservice.KeyboardView 
 android:id="@+id/keyboard_view" 
 android:layout_width="fill_parent" 
 android:layout_height="wrap_content" 
 android:layout_alignParentBottom="true" 
 android:focusable="true" 
 android:focusableInTouchMode="true" 
 android:background="@color/lightblack" 
 android:keyBackground="@drawable/btn_keyboard_key" 
 android:keyTextColor="@color/white" 
 android:visibility="gone" /> 
 </RelativeLayout> 
 
</LinearLayout>

通过布局文件可以看出界面上有两个输入框，其中一个是密码输入框，界面上还有一个隐藏的键盘控件。

在res下新建xml文件夹，在xml文件夹中新建qwerty.xml和symbols.xml文件. qwerty.xml 是字母键盘布局，symbols.xml 是数字键盘布局，内如如下

qwerty.xml内容

<?xml version="1.0" encoding="UTF-8"?> 
<Keyboard android:keyWidth="10.000002%p" android:keyHeight="@dimen/key_height" 
 android:horizontalGap="0.0px" android:verticalGap="0.0px" 
 xmlns:android="http://schemas.android.com/apk/res/android"> 
 <Row> 
 <Key android:codes="113" android:keyEdgeFlags="left" 
 android:keyLabel="q" /> 
 <Key android:codes="119" android:keyLabel="w" /> 
 <Key android:codes="101" android:keyLabel="e" /> 
 <Key android:codes="114" android:keyLabel="r" /> 
 <Key android:codes="116" android:keyLabel="t" /> 
 <Key android:codes="121" android:keyLabel="y" /> 
 <Key android:codes="117" android:keyLabel="u" /> 
 <Key android:codes="105" android:keyLabel="i" /> 
 <Key android:codes="111" android:keyLabel="o" /> 
 <Key android:codes="112" android:keyEdgeFlags="right" 
 android:keyLabel="p" /> 
 </Row> 
 <Row> 
 <Key android:horizontalGap="4.999995%p" android:codes="97" 
 android:keyEdgeFlags="left" android:keyLabel="a" /> 
 <Key android:codes="115" android:keyLabel="s" /> 
 <Key android:codes="100" android:keyLabel="d" /> 
 <Key android:codes="102" android:keyLabel="f" /> 
 <Key android:codes="103" android:keyLabel="g" /> 
 <Key android:codes="104" android:keyLabel="h" /> 
 <Key android:codes="106" android:keyLabel="j" /> 
 <Key android:codes="107" android:keyLabel="k" /> 
 <Key android:codes="108" android:keyEdgeFlags="right" 
 android:keyLabel="l" /> 
 </Row> 
 <Row> 
 <Key android:keyWidth="14.999998%p" android:codes="-1" 
 android:keyEdgeFlags="left" android:isModifier="true" 
 android:isSticky="true" android:keyIcon="@drawable/sym_keyboard_shift" /> 
 <Key android:codes="122" android:keyLabel="z" /> 
 <Key android:codes="120" android:keyLabel="x" /> 
 <Key android:codes="99" android:keyLabel="c" /> 
 <Key android:codes="118" android:keyLabel="v" /> 
 <Key android:codes="98" android:keyLabel="b" /> 
 <Key android:codes="110" android:keyLabel="n" /> 
 <Key android:codes="109" android:keyLabel="m" /> 
 <Key android:keyWidth="14.999998%p" android:codes="-5" 
 android:keyEdgeFlags="right" android:isRepeatable="true" 
 android:keyIcon="@drawable/sym_keyboard_delete" /> 
 </Row> 
 <Row android:rowEdgeFlags="bottom"> 
 <Key android:keyWidth="20.000004%p" android:codes="-2" 
 android:keyLabel="12#" /> 
 <Key android:keyWidth="14.999998%p" android:codes="44" 
 android:keyLabel="," /> 
 <Key android:keyWidth="29.999996%p" android:codes="32" 
 android:isRepeatable="true" android:keyIcon="@drawable/sym_keyboard_space" /> 
 <Key android:keyWidth="14.999998%p" android:codes="46" 
 android:keyLabel="." /> 
 <Key android:keyWidth="20.000004%p" android:codes="-3" 
 android:keyEdgeFlags="right" android:keyLabel="完成" /> 
 </Row> 
</Keyboard>

symbols.xml 内容

<?xml version="1.0" encoding="utf-8"?> 
<Keyboard xmlns:android="http://schemas.android.com/apk/res/android" 
 android:keyWidth="25%p" android:horizontalGap="0px" 
 android:verticalGap="0px" android:keyHeight="@dimen/key_height"> 
 <Row> 
 <Key android:codes="49" android:keyLabel="1" /> 
 <Key android:codes="50" android:keyLabel="2" /> 
 <Key android:codes="51" android:keyLabel="3" /> 
 <Key android:codes="57419" android:keyEdgeFlags="right" 
 android:keyIcon="@drawable/sym_keyboard_left" /> 
 </Row> 
 <Row> 
 <Key android:codes="52" android:keyLabel="4" /> 
 <Key android:codes="53" android:keyLabel="5" /> 
 <Key android:codes="54" android:keyLabel="6" /> 
 <Key android:codes="57421" android:keyEdgeFlags="right" 
 android:keyIcon="@drawable/sym_keyboard_right" /> 
 </Row> 
 <Row> 
 <Key android:codes="55" android:keyLabel="7" /> 
 <Key android:codes="56" android:keyLabel="8" /> 
 <Key android:codes="57" android:keyLabel="9" /> 
 <Key android:codes="-3" android:keyHeight="100dip" 
 android:keyEdgeFlags="right" android:isRepeatable="true" 
 android:keyLabel="完成" /> 
 </Row> 
 <Row> 
 <Key android:codes="-2" android:keyLabel="ABC" /> 
 <Key android:codes="48" android:keyLabel="0" /> 
 <Key android:codes="-5" android:keyIcon="@drawable/sym_keyboard_delete" /> 
 </Row> 
</Keyboard>

KeydemoActivity.java

package cn.key;  
 
import android.app.Activity;  
import android.content.Context;  
import android.os.Bundle;  
import android.text.InputType;  
import android.view.MotionEvent;  
import android.view.View;  
import android.view.View.OnTouchListener;  
import android.widget.EditText;  
 
public class KeydemoActivity extends Activity {  
 private Context ctx;  
 private Activity act;  
 private EditText edit;  
 private EditText edit1;  
 
 @Override 
 public void onCreate(Bundle savedInstanceState) {  
 super.onCreate(savedInstanceState);  
                setContentView(R.layout.main);  
                ctx = this;  
                act = this;  
 
                edit = (EditText) this.findViewById(R.id.edit);  
                edit.setInputType(InputType.TYPE_NULL);  
 
                edit1 = (EditText) this.findViewById(R.id.edit1);  
 
                edit.setOnTouchListener(new OnTouchListener() {  
 @Override 
 public boolean onTouch(View v, MotionEvent event) {  
 new KeyboardUtil(act, ctx, edit).showKeyboard();  
 return false;  
                        }  
                });  
 
                edit1.setOnTouchListener(new OnTouchListener() {  
 @Override 
 public boolean onTouch(View v, MotionEvent event) {  
 int inputback = edit1.getInputType();  
                                edit1.setInputType(InputType.TYPE_NULL);  
 new KeyboardUtil(act, ctx, edit1).showKeyboard();  
                                edit1.setInputType(inputback);  
 return false;  
                        }  
                });  
 
        }  
}  

KeyboardUtil.java

package cn.key;  
 
import java.util.List;  
 
import android.app.Activity;  
import android.content.Context;  
import android.inputmethodservice.Keyboard;  
import android.inputmethodservice.KeyboardView;  
import android.inputmethodservice.Keyboard.Key;  
import android.inputmethodservice.KeyboardView.OnKeyboardActionListener;  
import android.text.Editable;  
import android.view.View;  
import android.widget.EditText;  
 
public class KeyboardUtil {  
 private Context ctx;  
 private Activity act;  
 private KeyboardView keyboardView;  
 private Keyboard k1;// 字母键盘 
 private Keyboard k2;// 数字键盘 
 public boolean isnun = false;// 是否数据键盘 
 public boolean isupper = false;// 是否大写 
 
 private EditText ed;  
 
 public KeyboardUtil(Activity act, Context ctx, EditText edit) {  
 this.act = act;  
 this.ctx = ctx;  
 this.ed = edit;  
                k1 = new Keyboard(ctx, R.xml.qwerty);  
                k2 = new Keyboard(ctx, R.xml.symbols);  
                keyboardView = (KeyboardView) act.findViewById(R.id.keyboard_view);  
                keyboardView.setKeyboard(k1);  
                keyboardView.setEnabled(true);  
                keyboardView.setPreviewEnabled(true);  
                keyboardView.setOnKeyboardActionListener(listener);  
        }  
 
 private OnKeyboardActionListener listener = new OnKeyboardActionListener() {  
 @Override 
 public void swipeUp() {  
                }  
 
 @Override 
 public void swipeRight() {  
                }  
 
 @Override 
 public void swipeLeft() {  
                }  
 
 @Override 
 public void swipeDown() {  
                }  
 
 @Override 
 public void onText(CharSequence text) {  
                }  
 
 @Override 
 public void onRelease(int primaryCode) {  
                }  
 
 @Override 
 public void onPress(int primaryCode) {  
                }  
 
 @Override 
 public void onKey(int primaryCode, int[] keyCodes) {  
                        Editable editable = ed.getText();  
 int start = ed.getSelectionStart();  
 if (primaryCode == Keyboard.KEYCODE_CANCEL) {// 完成 
                                hideKeyboard();  
                        } else if (primaryCode == Keyboard.KEYCODE_DELETE) {// 回退 
 if (editable != null && editable.length() > 0) {  
 if (start > 0) {  
                                                editable.delete(start - 1, start);  
                                        }  
                                }  
                        } else if (primaryCode == Keyboard.KEYCODE_SHIFT) {// 大小写切换 
                                changeKey();  
                                keyboardView.setKeyboard(k1);  
 
                        } else if (primaryCode == Keyboard.KEYCODE_MODE_CHANGE) {// 数字键盘切换 
 if (isnun) {  
                                        isnun = false;  
                                        keyboardView.setKeyboard(k1);  
                                } else {  
                                        isnun = true;  
                                        keyboardView.setKeyboard(k2);  
                                }  
                        } else if (primaryCode == 57419) { // go left 
 if (start > 0) {  
                                        ed.setSelection(start - 1);  
                                }  
                        } else if (primaryCode == 57421) { // go right 
 if (start < ed.length()) {  
                                        ed.setSelection(start + 1);  
                                }  
                        } else {  
                                editable.insert(start, Character.toString((char) primaryCode));  
                        }  
                }  
        };  
 
 /** 
         * 键盘大小写切换 
         */ 
 private void changeKey() {  
                List<Key> keylist = k1.getKeys();  
 if (isupper) {//大写切换小写 
                        isupper = false;  
 for(Key key:keylist){  
 if (key.label!=null && isword(key.label.toString())) {  
                                        key.label = key.label.toString().toLowerCase();  
                                        key.codes[0] = key.codes[0]+32;  
                                }  
                        }  
                } else {//小写切换大写 
                        isupper = true;  
 for(Key key:keylist){  
 if (key.label!=null && isword(key.label.toString())) {  
                                        key.label = key.label.toString().toUpperCase();  
                                        key.codes[0] = key.codes[0]-32;  
                                }  
                        }  
                }  
        }  
 
 public void showKeyboard() {  
 int visibility = keyboardView.getVisibility();  
 if (visibility == View.GONE || visibility == View.INVISIBLE) {  
            keyboardView.setVisibility(View.VISIBLE);  
        }  
    }  
 
 public void hideKeyboard() {  
 int visibility = keyboardView.getVisibility();  
 if (visibility == View.VISIBLE) {  
            keyboardView.setVisibility(View.INVISIBLE);  
        }  
    }  
 
 private boolean isword(String str){  
            String wordstr = "abcdefghijklmnopqrstuvwxyz";  
 if (wordstr.indexOf(str.toLowerCase())>-1) {  
 return true;  
                }  
 return false;  
    }  
 
} 

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