一對一視頻聊天app源碼Android 密碼輸入框

// 按鈕寬度dp
private int           mWidth;
// 按鈕的bitmap
private Bitmap mBitmapInvisible;
private Bitmap mBitmapVisible;
// 按鈕是否可見
private boolean       isVisible;
// 清除按鈕出現動畫
private ValueAnimator mAnimatorVisible;
// 消失動畫
private ValueAnimator mAnimatorGone;
// 間隔
private int           Interval;
// 內容是否是明文
private boolean isPlaintext = false;
// 是否只在獲得焦點後顯示
private boolean focusedShow = false;

先了解這些變量含義。

/**
     * 繪製內容是否是明文的ICON
     */
    private void drawVisible(float scale, Canvas canvas) {
        int right  = (int) (getWidth() + getScrollX() - getmPaddingRight() - Interval - mWidth * (1f - scale) / 2f);
        int left   = (int) (getWidth() + getScrollX() - getmPaddingRight() - Interval - mWidth * (scale + (1f - scale) / 2f));
        int top    = (int) ((getHeight() - mWidth * scale) / 2);
        int bottom = (int) (top + mWidth * scale);
 
        rect.set(left, top, right, bottom);
        if (isPlaintext) {
            canvas.drawBitmap(mBitmapVisible, null, rect, null);
        } else {
            canvas.drawBitmap(mBitmapInvisible, null, rect, null);
        }
    }
 

 /**
     * 只在獲得焦點後顯示
     */
    private void focusedShow() {
        focusedShow(isFocusable());
    }
 

/**
 * 只在獲得焦點後顯示
 */
private void focusedShow(boolean focused) {
    if (!TextUtil.isEmpty(getText()) && isEditThis() && focused) {
        if (!isVisible) {
            isVisible = true;
            mAnimatorGone.end();
            mAnimatorVisible.end();
            mAnimatorVisible.start();
            invalidate();
        }
    } else {
        if (isVisible) {
            isVisible = false;
            mAnimatorGone.end();
            mAnimatorVisible.end();
            mAnimatorGone.start();
            invalidate();
        }
    }
}

// 按鈕資源
    private final int CLEAR = R.mipmap.icon_clear;
    // 動畫時長
    protected final int ANIMATOR_TIME = 200;
    // 按鈕左右間隔,單位PX
    private int Interval;
    // 清除按鈕寬度,單位PX
    private int mWidthClear;
    // 左內邊距
    private int mPaddingLeft;
    // 右內邊距
    private int mPaddingRight;
    // 右側多出的空間(間隔 + 按鈕寬度)
    private int mExtraWidth;
    // 清除按鈕的bitmap
    private Bitmap mBitmapClear;
    // 清除按鈕出現動畫
    private ValueAnimator mAnimatorVisible;
    // 消失動畫
    private ValueAnimator mAnimatorGone;
    // 是否顯示的記錄
    private boolean isVisible = false;
    // 右邊添加其他按鈕時使用
    private int mRight = 0;
 

/**
 * EditText內容變化的監聽
 */
@Override
protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
    if (getInputType() == (InputType.TYPE_NUMBER_FLAG_DECIMAL | InputType.TYPE_CLASS_NUMBER) && !TextUtils.isEmpty(text) && text.charAt(0) == '.') {
        if (text.length() == 1) {
            setText("0.");
        } else {
            setText(getText().replace(0, 0, "0."));
        }
        setSelection(getText().length());
    }
    super.onTextChanged(text, start, lengthBefore, lengthAfter);
    if (text.length() > 0 && isFocused() && isEditThis()) {
        if (!isVisible) {
            isVisible = true;
            startVisibleAnimator();
        }
    } else {
        if (isVisible) {
            isVisible = false;
            startGoneAnimator();
        }
    }
}

   @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        int additional = 0;
        if (getGravity() == Gravity.CENTER || getGravity() == Gravity.CENTER_HORIZONTAL) {
            additional = mExtraWidth + mRight + mPaddingRight;
        }
        // 設置內邊距
        setPadding(mPaddingLeft + additional, getPaddingTop(), mExtraWidth + mRight + mPaddingRight, getPaddingBottom());
 
        if (!TextUtil.isEmpty(getText()) && isEditThis()) {
            if (!isVisible) {
                isVisible = true;
                startVisibleAnimator();
            }
        } else {
            if (isVisible) {
                isVisible = false;
                startGoneAnimator();
            }
        }
    }

  /**
     * 晃動動畫
     *
     * @param counts 0.5秒鐘晃動多少下
     */
    private Animation shakeAnimation(int counts) {
        Animation translateAnimation = new TranslateAnimation(0, 10, 0, 0);
        translateAnimation.setInterpolator(new CycleInterpolator(counts));
        translateAnimation.setDuration(500);
        return translateAnimation;
    }
 
    /**
     * 給圖標染上當前提示文本的顏色並且轉出Bitmap
     */
    public Bitmap createBitmap(int resources, Context context) {
        final Drawable drawable = ContextCompat.getDrawable(context, resources);
        final Drawable wrappedDrawable = DrawableCompat.wrap(drawable);
        DrawableCompat.setTint(wrappedDrawable, getCurrentHintTextColor());
        return drawableToBitmap(wrappedDrawable);
    }
 

 

   /**
     * 觸控執行的監聽
     */
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_UP) {
            boolean touchable = (getWidth() - mPaddingRight - Interval - mRight - mWidthClear < event.getX())
                    && (event.getX() < getWidth() - mPaddingRight - Interval - mRight);
            if (touchable && isVisible) {
                setError(null);
                this.setText("");
            }
        }
        return super.onTouchEvent(event);
    }
 

其實主要的就是一些繪製和一些動畫的顯示，基本原理還是遵從Edittext的屬性來的。