仿微信支付密码输入框

两种不同实现，使用系统键盘和使用自定义键盘

1.简单功能，可结合自定义键盘使用，未处理系统键盘输入
布局

<?xml version="1.0" encoding="utf-8"?><merge xmlns:android="http://schemas.android.com/apk/res/android"              android:orientation="vertical"              android:layout_width="match_parent"              android:layout_height="match_parent">    <TextView        android:id="@+id/input1"        android:layout_width="@dimen/dimen_36_dip"        android:layout_height="@dimen/dimen_36_dip"        android:textSize="20sp"        android:textColor="#000000"        android:gravity="center"        android:background="@drawable/shape_bg_single_input"/>    <TextView        android:id="@+id/input2"        android:layout_width="@dimen/dimen_36_dip"        android:layout_height="@dimen/dimen_36_dip"        android:layout_marginLeft="-1dp"        android:textSize="20sp"        android:textColor="#000000"        android:gravity="center"        android:background="@drawable/shape_bg_single_input"/>    <TextView        android:id="@+id/input3"        android:layout_width="@dimen/dimen_36_dip"        android:layout_height="@dimen/dimen_36_dip"        android:layout_marginLeft="-1dp"        android:textSize="20sp"        android:textColor="#000000"        android:gravity="center"        android:background="@drawable/shape_bg_single_input"/>    <TextView        android:id="@+id/input4"        android:layout_width="@dimen/dimen_36_dip"        android:layout_height="@dimen/dimen_36_dip"        android:layout_marginLeft="-1dp"        android:textSize="20sp"        android:textColor="#000000"        android:gravity="center"        android:background="@drawable/shape_bg_single_input"/>    <TextView        android:id="@+id/input5"        android:layout_width="@dimen/dimen_36_dip"        android:layout_height="@dimen/dimen_36_dip"        android:layout_marginLeft="-1dp"        android:textSize="20sp"        android:textColor="#000000"        android:gravity="center"        android:background="@drawable/shape_bg_single_input"/>    <TextView        android:id="@+id/input6"        android:layout_width="@dimen/dimen_36_dip"        android:layout_height="@dimen/dimen_36_dip"        android:layout_marginLeft="-1dp"        android:textSize="20sp"        android:textColor="#000000"        android:gravity="center"        android:background="@drawable/shape_bg_single_input"/></merge>

代码：

public class VerifyCodeView extends LinearLayout {    private static final int MESSAGE_VERIFY_LENGTH = 6;    private int mCurrent;    private StringBuilder mMessageVerify = new StringBuilder();    private InputCompleteListener mCompleteListener;    public VerifyCodeView(Context context) {        super(context);        init();    }    public VerifyCodeView(Context context, AttributeSet attrs) {        super(context, attrs);        init();    }    public VerifyCodeView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        init();    }    private void init() {        setOrientation(LinearLayout.HORIZONTAL);        setGravity(Gravity.CENTER);        LayoutInflater.from(getContext()).inflate(R.layout.view_single_input, this);        mCurrent = 0;    }    public void append(String num) {        if (mCurrent == MESSAGE_VERIFY_LENGTH) {            return;        }        mMessageVerify.append(num);        ((TextView) getChildAt(mCurrent)).setText(num);        mCurrent++;        if (mCurrent == MESSAGE_VERIFY_LENGTH && mCompleteListener != null) {            mCompleteListener.onComplete();            clearContent();            return;        }    }    public void delete() {        if (mCurrent > 0) {            mCurrent--;            mMessageVerify.delete(mCurrent, mCurrent);            ((TextView) getChildAt(mCurrent)).setText("");        }    }    public void clearContent() {        mCurrent = 0;        mMessageVerify = new StringBuilder();        for (int i = 0; i < MESSAGE_VERIFY_LENGTH; i++) {            ((TextView) getChildAt(i)).setText("");        }    }    public String getMessage() {        return mMessageVerify.toString();    }    public interface InputCompleteListener {        void onComplete();    }    public void setCompleteListener(InputCompleteListener completeListener) {        mCompleteListener = completeListener;    }}

2.系统键盘输入

public class VerifyCodeView extends LinearLayout implements View.OnFocusChangeListener, TextWatcher, VerifyEditText.EmptyBackListener {    private static final int MESSAGE_VERIFY_LENGTH = 6;    private int mCurrent;    private StringBuilder mMessageVerify = new StringBuilder();    private VerifyEditText mItem1;    private VerifyEditText mItem2;    private VerifyEditText mItem3;    private VerifyEditText mItem4;    private VerifyEditText mItem5;    private VerifyEditText mItem6;    public VerifyCodeView(Context context) {        super(context);        init();    }    public VerifyCodeView(Context context, AttributeSet attrs) {        super(context, attrs);        init();    }    public VerifyCodeView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        init();    }    private void init() {        setOrientation(LinearLayout.HORIZONTAL);        setGravity(Gravity.CENTER);        LayoutInflater.from(getContext()).inflate(R.layout.view_single_input, this);        mItem1 = (VerifyEditText) findViewById(R.id.input1);        initEditText(mItem1, 1);        mItem2 = (VerifyEditText) findViewById(R.id.input2);        initEditText(mItem2, 2);        mItem3 = (VerifyEditText) findViewById(R.id.input3);        initEditText(mItem3, 3);        mItem4 = (VerifyEditText) findViewById(R.id.input4);        initEditText(mItem4, 4);        mItem5 = (VerifyEditText) findViewById(R.id.input5);        initEditText(mItem5, 5);        mItem6 = (VerifyEditText) findViewById(R.id.input6);        initEditText(mItem6, 6);        mCurrent = 0;    }    private void initEditText(VerifyEditText item, int tag) {        item.setOnFocusChangeListener(this);        item.setTag(tag);        item.setListener(this);        item.addTextChangedListener(this);    }    public void append(String num) {        if (mCurrent == MESSAGE_VERIFY_LENGTH) {            return;        }        mMessageVerify.append(num);        mCurrent++;    }    public void delete() {        if (mCurrent > 0) {            mMessageVerify = mMessageVerify.deleteCharAt(mCurrent - 1);            mCurrent--;        }    }    public void clearContent() {        mCurrent = 0;        mMessageVerify = new StringBuilder();        for (int i = 0; i < MESSAGE_VERIFY_LENGTH; i++) {            ((TextView) getChildAt(i)).setText("");        }    }    public String getMessage() {        return mMessageVerify.toString();    }    @Override    public void onFocusChange(View v, boolean hasFocus) {        if (hasFocus && (int) v.getTag() != mCurrent) {            if (mCurrent < MESSAGE_VERIFY_LENGTH) {                getChildAt(mCurrent).requestFocus();            } else {                getChildAt(MESSAGE_VERIFY_LENGTH - 1).requestFocus();            }        }    }    @Override    public void beforeTextChanged(CharSequence s, int start, int count, int after) {    }    @Override    public void onTextChanged(CharSequence s, int start, int before, int count) {    }    @Override    public void afterTextChanged(Editable s) {        if (!TextUtils.isEmpty(s.toString())) {            append(s.toString());            if (mCurrent < MESSAGE_VERIFY_LENGTH) {                getChildAt(mCurrent).requestFocus();            }        } else if (mCurrent == MESSAGE_VERIFY_LENGTH) {            delete();            EditText edt = (EditText) getChildAt(mCurrent);            edt.setText(null);            edt.requestFocus();        }    }    @Override    public void onEmptyBack() {        delete();        EditText edt = (EditText) getChildAt(mCurrent);        edt.setText(null);        edt.requestFocus();    }}

public class VerifyEditText extends AppCompatEditText {    private EmptyBackListener mListener;    public VerifyEditText(Context context) {        super(context);    }    public VerifyEditText(Context context, AttributeSet attrs) {        super(context, attrs);    }    public VerifyEditText(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);    }    public void setListener(EmptyBackListener listener) {        mListener = listener;    }    @Override    public boolean onKeyDown(int keyCode, KeyEvent event) {        if (TextUtils.isEmpty(getText()) && keyCode == KeyEvent.KEYCODE_DEL && mListener != null) {            mListener.onEmptyBack();        }        return super.onKeyDown(keyCode, event);    }    interface EmptyBackListener {        void onEmptyBack();    }}