帶有右側(cè)點(diǎn)擊圖片顯示和隱藏密碼的功能.

 <com.yuanin.aimifinance.view.PasswordEditText
            android:id="@+id/etPwd"
            style="@style/passwordEditText"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="@dimen/small_margin"
            android:background="@mipmap/login_edittext_bg"
            android:drawableLeft="@mipmap/login_password"
            android:drawablePadding="@dimen/margin_eight"
            android:gravity="center_vertical"
            android:hint="@string/input_login_password"
            android:paddingLeft="@dimen/margin_eight"
            android:paddingRight="@dimen/margin_eight"
            android:textColor="@color/text_black"
            android:textColorHint="@color/text_light_gray"
            android:textSize="@dimen/normal_text"/>

public class PasswordEditText extends EditText implements View.OnFocusChangeListener,
        TextWatcher {
    //EditText右側(cè)的眼睛按鈕
    private Drawable mHideDrawable, mShowDrawable, mCurrentDrawable;
    private boolean hasFoucs;
    private boolean isShowPwd = false;

    public PasswordEditText(Context context) {
        this(context, null);
    }

    public PasswordEditText(Context context, AttributeSet attrs) {
        this(context, attrs, android.R.attr.editTextStyle);
    }

    public PasswordEditText(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }

    private void init() {
        // 獲取EditText的DrawableRight,假如沒有設(shè)置我們就使用默認(rèn)的圖片,獲取圖片的順序是左上右下（0,1,2,3,）
        mHideDrawable = getResources().getDrawable(
                R.mipmap.login_hide_pwd);
        mShowDrawable = getResources().getDrawable(
                R.mipmap.login_show_pwd);
        mHideDrawable.setBounds(0, 0, mHideDrawable.getIntrinsicWidth(),
                mHideDrawable.getIntrinsicHeight()+10);

        mCurrentDrawable = mHideDrawable;
        // 默認(rèn)設(shè)置隱藏圖標(biāo)
        setClearIconVisible(false);
        // 設(shè)置焦點(diǎn)改變的監(jiān)聽
        setOnFocusChangeListener(this);
        // 設(shè)置輸入框里面內(nèi)容發(fā)生改變的監(jiān)聽
        addTextChangedListener(this);
    }

    /* *@說明：isInnerWidth, isInnerHeight為ture盒粮，觸摸點(diǎn)在刪除圖標(biāo)之內(nèi)嚷闭，則視為點(diǎn)擊了刪除圖標(biāo)
     * event.getX() 獲取相對(duì)應(yīng)自身左上角的X坐標(biāo)
     * event.getY() 獲取相對(duì)應(yīng)自身左上角的Y坐標(biāo)
     * getWidth() 獲取控件的寬度
     * getHeight() 獲取控件的高度
     * getTotalPaddingRight() 獲取刪除圖標(biāo)左邊緣到控件右邊緣的距離
     * getPaddingRight() 獲取刪除圖標(biāo)右邊緣到控件右邊緣的距離
     * isInnerWidth:
     *  getWidth() - getTotalPaddingRight() 計(jì)算刪除圖標(biāo)左邊緣到控件左邊緣的距離
     *  getWidth() - getPaddingRight() 計(jì)算刪除圖標(biāo)右邊緣到控件左邊緣的距離
     * isInnerHeight:
     *  distance 刪除圖標(biāo)頂部邊緣到控件頂部邊緣的距離
     *  distance + height 刪除圖標(biāo)底部邊緣到控件頂部邊緣的距離
     */
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_UP) {
            if (getCompoundDrawables()[2] != null) {
                int x = (int) event.getX();
                int y = (int) event.getY();
                Rect rect = getCompoundDrawables()[2].getBounds();
                int height = rect.height();
                int distance = (getHeight() - height) / 2;
                boolean isInnerWidth = x > (getWidth() - getTotalPaddingRight()) && x < (getWidth() - getPaddingRight());
                boolean isInnerHeight = y > distance && y < (distance + height);
                if (isInnerWidth && isInnerHeight) {
                    if (isShowPwd) {
                        //設(shè)置EditText文本為隱藏的
                        this.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
                        mHideDrawable.setBounds(0, 0, mHideDrawable.getIntrinsicWidth(),
                                mHideDrawable.getIntrinsicHeight()+10);
                        mCurrentDrawable = mHideDrawable;
                        setClearIconVisible(true);
                    } else {
                        //設(shè)置EditText文本為可見的
                        this.setInputType(InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
                        mShowDrawable.setBounds(0, 0, mShowDrawable.getIntrinsicWidth(),
                                mShowDrawable.getIntrinsicHeight()+10);
                        mCurrentDrawable = mShowDrawable;
                        setClearIconVisible(true);
                    }
                    isShowPwd = !isShowPwd;
                    this.setSelection(TextUtils.isEmpty(this.getText()) ? 0 : this.length());//光標(biāo)挪到最后
                }
            }
        }
        return super.onTouchEvent(event);
    }

    /**
     * 當(dāng)ClearEditText焦點(diǎn)發(fā)生變化的時(shí)候，
     * 輸入長度為零卤恳，隱藏刪除圖標(biāo)鳞滨，否則洞焙，顯示刪除圖標(biāo)
     */
    @Override
    public void onFocusChange(View v, boolean hasFocus) {
        this.hasFoucs = hasFocus;
    }

    protected void setClearIconVisible(boolean visible) {
        Drawable right = visible ? mCurrentDrawable : null;
        setCompoundDrawables(getCompoundDrawables()[0],
                getCompoundDrawables()[1], right, getCompoundDrawables()[3]);
    }

    @Override
    public void onTextChanged(CharSequence s, int start, int count, int after) {
        if (hasFoucs) {
            setClearIconVisible(s.length() > 0);
        }
    }

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

    }

    @Override
    public void afterTextChanged(Editable s) {

    }


}

<style name="passwordEditText">
        <item name="android:inputType">textPassword</item>
        <item name="android:maxLength">16</item>
</style>