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Android自定义密码键盘

更新时间：2022-02-15 07:30:38

先上图
Android自定义密码键盘

先看一下键盘的布局文件control_digitpasswordkeypad.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/digitkeypadrootlayout"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
 
    <LinearLayout
        android:id="@+id/transpwdpdpanel"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:background="#000000" >
    </LinearLayout>
 
    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_weight="0"
        android:background="@drawable/keyboardbackground"
        android:gravity="bottom"
        android:orientation="vertical"
        android:paddingBottom="4dp"
        android:paddingLeft="4dp"
        android:paddingRight="4dp" >
 
        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="4dp"
            android:layout_marginRight="4dp"
            android:orientation="horizontal" >
 
            <EditText
                android:id="@+id/digitpadedittext"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:gravity="center_vertical|right"
                android:singleLine="true" />
        </LinearLayout>
 
        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >
 
            <Button
                android:id="@+id/digitkeypad_1"
                android:layout_width="wrap_content"
                android:layout_height="46dp"
                android:layout_marginLeft="4dp"
                android:layout_marginRight="2dp"
                android:layout_weight="1"
                android:background="@drawable/widget_keypad_digit"
                android:gravity="center"
                android:text="1"
                android:textSize="22sp" >
            </Button>
 
            <Button
                android:id="@+id/digitkeypad_2"
                android:layout_width="wrap_content"
                android:layout_height="46dp"
                android:layout_marginLeft="2dp"
                android:layout_marginRight="3dp"
                android:layout_weight="1"
                android:background="@drawable/widget_keypad_digit"
                android:gravity="center"
                android:text="2"
                android:textSize="22sp" >
            </Button>
 
            <Button
                android:id="@+id/digitkeypad_3"
                android:layout_width="wrap_content"
                android:layout_height="46dp"
                android:layout_marginLeft="2dp"
                android:layout_marginRight="4dp"
                android:layout_weight="1"
                android:background="@drawable/widget_keypad_digit"
                android:gravity="center"
                android:text="3"
                android:textSize="22sp" >
            </Button>
        </LinearLayout>
 
        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >
 
            <Button
                android:id="@+id/digitkeypad_4"
                android:layout_width="wrap_content"
                android:layout_height="46dp"
                android:layout_marginLeft="4dp"
                android:layout_marginRight="2dp"
                android:layout_weight="1"
                android:background="@drawable/widget_keypad_digit"
                android:text="4"
                android:textSize="22sp" >
            </Button>
 
            <Button
                android:id="@+id/digitkeypad_5"
                android:layout_width="wrap_content"
                android:layout_height="46dp"
                android:layout_marginLeft="2dp"
                android:layout_marginRight="3dp"
                android:layout_weight="1"
                android:background="@drawable/widget_keypad_digit"
                android:text="5"
                android:textSize="22sp" >
            </Button>
 
            <Button
                android:id="@+id/digitkeypad_6"
                android:layout_width="wrap_content"
                android:layout_height="46dp"
                android:layout_marginLeft="2dp"
                android:layout_marginRight="4dp"
                android:layout_weight="1"
                android:background="@drawable/widget_keypad_digit"
                android:text="6"
                android:textSize="22sp" >
            </Button>
        </LinearLayout>
 
        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >
 
            <Button
                android:id="@+id/digitkeypad_7"
                android:layout_width="80dp"
                android:layout_height="46dp"
                android:layout_marginLeft="4dp"
                android:layout_marginRight="2dp"
                android:layout_weight="1"
                android:background="@drawable/widget_keypad_digit"
                android:text="7"
                android:textSize="22sp" >
            </Button>
 
            <Button
                android:id="@+id/digitkeypad_8"
                android:layout_width="80dp"
                android:layout_height="46dp"
                android:layout_marginLeft="2dp"
                android:layout_marginRight="3dp"
                android:layout_weight="1"
                android:background="@drawable/widget_keypad_digit"
                android:text="8"
                android:textSize="22sp" >
            </Button>
 
            <Button
                android:id="@+id/digitkeypad_9"
                android:layout_width="80dp"
                android:layout_height="46dp"
                android:layout_marginLeft="2dp"
                android:layout_marginRight="4dp"
                android:layout_weight="1"
                android:background="@drawable/widget_keypad_digit"
                android:text="9"
                android:textSize="22sp" >
            </Button>
        </LinearLayout>
 
        <LinearLayout
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal" >
 
            <Button
                android:id="@+id/digitkeypad_c"
                android:layout_width="80dp"
                android:layout_height="46dp"
                android:layout_marginLeft="4dp"
                android:layout_marginRight="2dp"
                android:layout_weight="1"
                android:background="@drawable/keyboardclear"
                android:text=""
                android:textSize="22sp" >
            </Button>
 
            <Button
                android:id="@+id/digitkeypad_0"
                android:layout_width="80dp"
                android:layout_height="46dp"
                android:layout_marginLeft="2dp"
                android:layout_marginRight="3dp"
                android:layout_weight="1"
                android:background="@drawable/widget_keypad_digit"
                android:text="0"
                android:textSize="22sp" >
            </Button>
 
            <Button
                android:id="@+id/digitkeypad_ok"
                android:layout_width="80dp"
                android:layout_height="46dp"
                android:layout_marginLeft="2dp"
                android:layout_marginRight="4dp"
                android:layout_weight="1"
                android:background="@drawable/keyboardok"
                android:text=""
                android:textSize="22sp" >
            </Button>
        </LinearLayout>
    </LinearLayout>
 
</LinearLayout>

键盘布局文件截图如下：
Android自定义密码键盘
下面看一下主界面的布局文件mian.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="vertical" >
 
    <TextView
        android:id="@+id/input"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:hint="请输入数字"
        />
 
</LinearLayout>

主界面只有一个TextView控件，通过触发TextView的单击事件弹出自定义键盘

触发事件代码：

[java] view plaincopy
  1. TextView editText = (TextView)findViewById(R.id.input);  
  2. editText.setOnClickListener(new OnClickListener() {  
  3.     @Override  
  4.     public void onClick(View v) {  
  5.         showPassWdPadView();  
  6.     }  
  7. });  

弹出自定义键盘方法showPassWdPadView（）
[java] view plaincopy
  1. private void showPassWdPadView() {  
  2.         this.runOnUiThread(new Runnable() {  
  3.             public void run() {  
  4.                 // 让一个视图浮动在你的应用程序之上  
  5.                 WindowManager windowmanager = (WindowManager) content.getSystemService(Context.WINDOW_SERVICE);  
  6.                 LayoutParams layoutparams = new LayoutParams(-1, -1, WindowManager.LayoutParams.FIRST_SUB_WINDOW, WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, PixelFormat.RGBA_8888);  
  7.                 layoutparams.gravity = Gravity.BOTTOM;  
  8.                 passwdview.findViewById(R.id.transpwdpdpanel).getBackground().setAlpha(140);  
  9.                 windowmanager.addView(passwdview, layoutparams);  
  10.             }  
  11.         });  
  12. }  

这里用到了WindowManager，具体用法可参考网上。

下面是主界面的全部代码

import android.app.Activity;
import android.content.Context;
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.view.Gravity;
import android.view.View;
import android.view.WindowManager;
import android.view.View.OnClickListener;
import android.view.WindowManager.LayoutParams;
import android.widget.TextView;
 
public class AndroidInputNumberActivity extends Activity {
    private DigitPasswordKeyPad dpk;
    private View passwdview;
    private Context content ;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        content = this;
        
        dpk = new DigitPasswordKeyPad(this);
        passwdview = dpk.setup();
        
        TextView editText = (TextView)findViewById(R.id.input);
        editText.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                showPassWdPadView();
            }
        });
    }
    
    private void showPassWdPadView() {
            this.runOnUiThread(new Runnable() {
                public void run() {
                    // 让一个视图浮动在你的应用程序之上
                    WindowManager windowmanager = (WindowManager) content.getSystemService(Context.WINDOW_SERVICE);
                    LayoutParams layoutparams = new LayoutParams(-1, -1, WindowManager.LayoutParams.FIRST_SUB_WINDOW, WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE, PixelFormat.RGBA_8888);
                    layoutparams.gravity = Gravity.BOTTOM;
                    passwdview.findViewById(R.id.transpwdpdpanel).getBackground().setAlpha(140);
                    windowmanager.addView(passwdview, layoutparams);
                }
            });
    }
}

面代码中passwdview这个对象就是弹出键盘界面的View实例，passwdview这个对象是在DigitPasswordKeyPad中初始化得到。
DigitPasswordKeyPad类自定义键盘类，继承自View类

import android.content.Context;
import android.text.InputType;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
 
/**
 * 系统定制的数字密码键盘
 *
 * @author twf
 *
 */
public class DigitPasswordKeyPad extends View {
    private Context ctx = null;
    private View v;
    private String digitnum = "";
    private int length = 6;
 
    private Button digitkeypad_1;
    private Button digitkeypad_2;
    private Button digitkeypad_3;
    private Button digitkeypad_4;
    private Button digitkeypad_5;
    private Button digitkeypad_6;
    private Button digitkeypad_7;
    private Button digitkeypad_8;
    private Button digitkeypad_9;
    private Button digitkeypad_0;
    private Button digitkeypad_c;
    private Button digitkeypad_ok;
    private EditText digitkeypad_edittext;
 
    private boolean isPwd;
 
    public DigitPasswordKeyPad(Context ctx) {
        super(ctx);
        this.ctx = ctx;
    }
 
    @Override
    protected void onLayout(boolean arg0, int arg1, int arg2, int arg3, int arg4) {
    }
 
    public void setEditTextIsPwd(boolean ispwd) {
        if (ispwd) {
            digitkeypad_edittext.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
        } else {
            digitkeypad_edittext.setInputType(InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
        }
        this.isPwd = ispwd;
    }
 
    public View setup() {
        LayoutInflater lif = LayoutInflater.from(ctx);
        v = lif.inflate(R.layout.control_digitpasswordkeypad, null);
 
        // 初始化 对象
        digitkeypad_1 = (Button) v.findViewById(R.id.digitkeypad_1);
        digitkeypad_2 = (Button) v.findViewById(R.id.digitkeypad_2);
        digitkeypad_3 = (Button) v.findViewById(R.id.digitkeypad_3);
        digitkeypad_4 = (Button) v.findViewById(R.id.digitkeypad_4);
        digitkeypad_5 = (Button) v.findViewById(R.id.digitkeypad_5);
        digitkeypad_6 = (Button) v.findViewById(R.id.digitkeypad_6);
        digitkeypad_7 = (Button) v.findViewById(R.id.digitkeypad_7);
        digitkeypad_8 = (Button) v.findViewById(R.id.digitkeypad_8);
        digitkeypad_9 = (Button) v.findViewById(R.id.digitkeypad_9);
        digitkeypad_0 = (Button) v.findViewById(R.id.digitkeypad_0);
        digitkeypad_c = (Button) v.findViewById(R.id.digitkeypad_c);
        digitkeypad_ok = (Button) v.findViewById(R.id.digitkeypad_ok);
        digitkeypad_edittext = (EditText) v.findViewById(R.id.digitpadedittext);
 
        // 添加点击事件
        DigitPasswordKeypadOnClickListener dkol = new DigitPasswordKeypadOnClickListener();
        digitkeypad_1.setOnClickListener(dkol);
        digitkeypad_2.setOnClickListener(dkol);
        digitkeypad_3.setOnClickListener(dkol);
        digitkeypad_4.setOnClickListener(dkol);
        digitkeypad_5.setOnClickListener(dkol);
        digitkeypad_6.setOnClickListener(dkol);
        digitkeypad_7.setOnClickListener(dkol);
        digitkeypad_8.setOnClickListener(dkol);
        digitkeypad_9.setOnClickListener(dkol);
        digitkeypad_0.setOnClickListener(dkol);
        digitkeypad_c.setOnClickListener(dkol);
        digitkeypad_ok.setOnClickListener(new DigitPasswordKeypadFinshOnClikcListener());
 
        return v;
    }
 
    private class DigitPasswordKeypadFinshOnClikcListener implements OnClickListener {
 
        @Override
        public void onClick(View v) {
            int viewId = v.getId();
 
            if (viewId == R.id.digitkeypad_ok) {
                // 点击完成
                // 设置值回页面
                // 隐藏自己View
                // if (isPwd) {
                // jsimpl.hidePasswdPad(digitkeypad_edittext.getText().toString());
                // } else {
                // jsimpl.hideCallNumPad(digitkeypad_edittext.getText().toString());
                // }
                DigitPasswordKeyPad.this.setVisibility(View.GONE);
            }
        }
    }
 
    public void initInputLable(String str, int length) {
        str = str.trim();
        digitnum = str;
        this.length = length;
        digitkeypad_edittext.setText(digitnum);
        digitkeypad_edittext.setSelection(digitnum.length());
    }
 
    private class DigitPasswordKeypadOnClickListener implements OnClickListener {
 
        @Override
        public void onClick(View v) {
            int viewId = v.getId();
 
            switch (viewId) {
            case R.id.digitkeypad_1:
                if (digitnum.length() == length) {
                    return;
                } else {
                    digitnum += 1;
                }
                break;
            case R.id.digitkeypad_2:
                if (digitnum.length() == length) {
                    return;
                } else {
                    digitnum += 2;
                }
                break;
            case R.id.digitkeypad_3:
                if (digitnum.length() == length) {
                    return;
                } else {
                    digitnum += 3;
                }
                break;
            case R.id.digitkeypad_4:
                if (digitnum.length() == length) {
                    return;
                } else {
                    digitnum += 4;
                }
                break;
            case R.id.digitkeypad_5:
                if (digitnum.length() == length) {
                    return;
                } else {
                    digitnum += 5;
                }
                break;
            case R.id.digitkeypad_6:
                if (digitnum.length() == length) {
                    return;
                } else {
                    digitnum += 6;
                }
                break;
            case R.id.digitkeypad_7:
                if (digitnum.length() == length) {
                    return;
                } else {
                    digitnum += 7;
                }
                break;
            case R.id.digitkeypad_8:
                if (digitnum.length() == length) {
                    return;
                } else {
                    digitnum += 8;
                }
                break;
            case R.id.digitkeypad_9:
                if (digitnum.length() == length) {
                    return;
                } else {
                    digitnum += 9;
                }
                break;
            case R.id.digitkeypad_0:
                if (digitnum.length() == length) {
                    return;
                } else {
                    digitnum += 0;
                }
 
                break;
            case R.id.digitkeypad_c:// 后退
                if (digitnum.length() > 0) {
                    digitnum = digitnum.substring(0, digitnum.length() - 1);
                }
                break;
            }
            // 格式化 数据
            digitkeypad_edittext.setText(digitnum);
            digitkeypad_edittext.setSelection(null != digitnum ? digitnum.length() : 0);
        }
 
    }
}


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