一对一视频聊天app源码Android 密码输入框

// 按钮宽度dp private int mWidth; // 按钮的bitmap private Bitmap mBitmapInvisible; private Bitmap mBitmapVisible; // 按钮是否可见 private boolean isVisible; // 清除按钮出现动画 private ValueAnimator mAnimatorVisible; // 消失动画 private ValueAnimator mAnimatorGone; // 间隔 private int Interval; // 内容是否是明文 private boolean isPlaintext = false; // 是否只在获得焦点后显示 private boolean focusedShow = false;

先了解这些变量含义。

/** * 绘制内容是否是明文的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); } } /** * 只在获得焦点后显示 */ private void focusedShow() { focusedShow(isFocusable()); } /** * 只在获得焦点后显示 */ 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(); } } } // 按钮资源 private final int CLEAR = R.mipmap.icon_clear; // 动画时长 protected final int ANIMATOR_TIME = 200; // 按钮左右间隔,单位PX private int Interval; // 清除按钮宽度,单位PX private int mWidthClear; // 左内边距 private int mPaddingLeft; // 右内边距 private int mPaddingRight; // 右侧多出的空间(间隔 + 按钮宽度) private int mExtraWidth; // 清除按钮的bitmap private Bitmap mBitmapClear; // 清除按钮出现动画 private ValueAnimator mAnimatorVisible; // 消失动画 private ValueAnimator mAnimatorGone; // 是否显示的记录 private boolean isVisible = false; // 右边添加其他按钮时使用 private int mRight = 0; /** * EditText内容变化的监听 */ @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; } // 设置内边距 setPadding(mPaddingLeft + additional, getPaddingTop(), mExtraWidth + mRight + mPaddingRight, getPaddingBottom()); if (!TextUtil.isEmpty(getText()) && isEditThis()) { if (!isVisible) { isVisible = true; startVisibleAnimator(); } } else { if (isVisible) { isVisible = false; startGoneAnimator(); } } } /** * 晃动动画 * * @param counts 0.5秒钟晃动多少下 */ private Animation shakeAnimation(int counts) { Animation translateAnimation = new TranslateAnimation(0, 10, 0, 0); translateAnimation.setInterpolator(new CycleInterpolator(counts)); translateAnimation.setDuration(500); return translateAnimation; } /** * 给图标染上当前提示文本的颜色并且转出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); } /** * 触控执行的监听 */ @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); }

其实主要的就是一些绘制和一些动画的显示，基本原理还是遵从Edittext的属性来的。