自定义 密码是否可见 的EditView 右侧带个小眼睛

package com.qyk.douban.widget;

import android.content.Context;

import android.text.Editable;

import android.text.InputType;

import android.text.Selection;

import android.text.TextWatcher;

import android.util.AttributeSet;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.ViewGroup;

import android.widget.EditText;

import android.widget.TextView;

public class EditTextPassWordVisiable extends ViewGroup implements OnClickListener {

    private TextView clearImage;

    private EditText editText;

    private boolean pswVisiable = false;

    private int clearImageRightPading = 20;

    private int drawableVisiable,drawableUnVisiable;

    private TextWatcher textWatcher = new TextWatcher() {

        @Override

        public void onTextChanged(CharSequence s, int start, int before, int count) {

        }

        @Override

        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override

        public void afterTextChanged(Editable s) {

//            if (s.length() == 0) {

//                clearImage.setVisibility(View.GONE);

//            } else {

//                clearImage.setVisibility(View.VISIBLE);

//            }

        }

    };

    public EditTextPassWordVisiable(Context context) {

        super(context);

        initViews();

    }

    public EditTextPassWordVisiable(Context context, AttributeSet attrs) {

        super(context, attrs);

        initViews();

    }

    public EditTextPassWordVisiable(Context context, AttributeSet attrs, int defStyle) {

        super(context, attrs, defStyle);

        initViews();

    }

    private void initViews() {

        final Context mContext = getContext();

        clearImage = new TextView(mContext);

        clearImage.setLayoutParams(new ViewGroup.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

        clearImage.setOnClickListener(this);

        editText = new EditText(mContext);

        editText.setLayoutParams(new ViewGroup.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT));

        editText.addTextChangedListener(textWatcher);

        editText.setSingleLine(true);

        addView(editText);

        addView(clearImage);

        requestLayout();

    }

    /**

     * 设置 清除图片 的资源

     *

     * @param drawableId

     */

    public void setClearImageDrawableId(int drawableId) {

        clearImage.setBackgroundResource(drawableId);

    }

    /**

     * 设置EditText的padding（如果调用了{@link #setEditTextBackGround(int)}

     * 方法，其背景图片是.9图的话，必须要调用此方法）

     *

     * @param paddingLeft   左边的padding

     * @param paddinTop     上边padding

     * @param paddingRight  右边padding（这个padding是指文章到 清除图片的 padding）

     * @param paddingBottom 下边padding

     */

    public void setEditTextPadding(int paddingLeft, int paddinTop, int paddingRight, int paddingBottom) {

        paddingRight += clearImageRightPading + clearImage.getBackground().getIntrinsicWidth();

        editText.setPadding(paddingLeft, paddinTop, paddingRight, paddingBottom);

    }

    /**

     * 设置删除图片距离右边的距离

     *

     * @param clearImageRightPading

     */

    public void setClearImageRightPadding(int clearImageRightPading) {

        this.clearImageRightPading = clearImageRightPading;

        requestLayout();

    }

    /**

     * 设置EditText的背景</br>Note</br>(1)调用了该方法之后，如果背景图是.9图的话，必须调用

     * {@link #setEditTextPadding(int, int, int, int)}方法 </br>(2)此方法必须是调用了

     * {@link #setClearImageDrawableId(int)}之后才能调用

     *

     * @param resid

     */

    public void setEditTextBackGround(int resid) {

        editText.setBackgroundResource(resid);

    }

    public void setTextColor(int color) {

        editText.setTextColor(color);

    }

    public void setTextSize(int size) {

        editText.setTextSize(size);

    }

    @Override

    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

        super.onMeasure(widthMeasureSpec, heightMeasureSpec);

        int width = MeasureSpec.getSize(widthMeasureSpec);

        // int height = MeasureSpec.getSize(heightMeasureSpec);

        int childCount = getChildCount();

        for (int i = 0; i < childCount; i++) {

            if (i == 0) {

                getChildAt(i).measure(MeasureSpec.makeMeasureSpec(getWidth(), MeasureSpec.EXACTLY),

                        getDefaultSize(getSuggestedMinimumHeight(), heightMeasureSpec));

            } else {

                TextView secondView = (TextView) getChildAt(i);

                secondView.measure(MeasureSpec.makeMeasureSpec(secondView.getBackground().getIntrinsicWidth(), MeasureSpec.UNSPECIFIED),

                        MeasureSpec.makeMeasureSpec(secondView.getBackground().getIntrinsicHeight(), MeasureSpec.UNSPECIFIED));

            }

        }

        setMeasuredDimension(width, getChildAt(0).getMeasuredHeight());

    }

    @Override

    protected void onLayout(boolean changed, int l, int t, int r, int b) {

        final EditText firstView = editText;

        final View secondView = clearImage;

        final int editTextWith = firstView.getMeasuredWidth();

        final int imageViewWidth = secondView.getMeasuredWidth();

        firstView.layout(0, 0, editTextWith, firstView.getMeasuredHeight());

        final int top = (firstView.getMeasuredHeight() - secondView.getMeasuredHeight()) >> 1;

        secondView.layout(editTextWith - imageViewWidth - clearImageRightPading, top, editTextWith - clearImageRightPading, top

                + secondView.getMeasuredHeight());

    }

    @Override

    public void onClick(View v) {

        pswVisiable = !pswVisiable;

        if (pswVisiable) {

            setClearImageDrawableId(getDrawableVisiable());

            editText.setInputType(InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);

            Editable etable = editText.getText();

            Selection.setSelection(etable, etable.length());

        } else {

            setClearImageDrawableId(getDrawableUnVisiable());

            editText.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);

            //下面两行代码实现: 输入框光标一直在输入文本后面

            Editable etable = editText.getText();

            Selection.setSelection(etable, etable.length());

        }

    }

    /**

     * 获得密码可见图标

     * @return

     */

    public int getDrawableVisiable() {

        return drawableVisiable;

    }

    /**

     * 获得密码不可见图标

     * @return

     */

    public int getDrawableUnVisiable() {

        return drawableUnVisiable;

    }

    /**

     * 设置密码可见的图标

     * @param drawableVisiable

     */

    public void setDrawableVisiable(int drawableVisiable) {

        this.drawableVisiable = drawableVisiable;

    }

    /**

     * 设置密码不可见的图标

     * @param drawableUnVisiable

     */

    public void setDrawableUnVisiable(int drawableUnVisiable) {

        this.drawableUnVisiable = drawableUnVisiable;

    }

}

                clearEditText.setDrawableVisiable(R.drawable.eye_open);//必须

		clearEditText.setDrawableUnVisiable(R.drawable.eye_closed);//必须

		clearEditText.setClearImageDrawableId(clearEditText.getDrawableUnVisiable());//设置默认情况的图标

//		clearEditText.setEditTextBackGround(R.drawable.bg_tab_search_edit);

		clearEditText.setEditTextPadding(30, 20, 20, 20);

		clearEditText.setClearImageRightPadding(20);

		clearEditText.setTextColor(R.color.colorPrimaryDark);