strtum+tcp://作为前缀一直
参考
https://code.i-harness.com/zh-CN/q/d89a07
OneKeyClearEditText
package view;
import android.annotation.SuppressLint;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.support.v4.graphics.drawable.DrawableCompat;
import android.support.v7.widget.AppCompatEditText;
import android.text.Editable;
import android.text.TextPaint;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import com.zstart.btc.R;
import common.utils.LogUtils;
/**
* 一键清除的EditText
*
* @author yuhao
*/
public class OneKeyClearEditText extends AppCompatEditText implements View.OnFocusChangeListener, TextWatcher {
private int OriginalPaddingLeft = -1;
private String preFixText;
private Drawable mClearDrawable;// 一键删除的按钮
private int drawableColor = 0;
private boolean hasFocus;// 控件是否有焦点
public OneKeyClearEditText(Context context) {
this(context, null);
}
public OneKeyClearEditText(Context context, AttributeSet attrs) {
this(context, attrs, R.attr.editTextStyle);
}
@SuppressLint("InlinedApi")
public OneKeyClearEditText(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
TypedArray array = context.getTheme().obtainStyledAttributes(new int[]{android.R.attr.colorAccent});
array.recycle();
TypedArray array2 = context.obtainStyledAttributes(attrs, R.styleable.OneKeyClearEditText);
drawableColor = array2.getColor(R.styleable.OneKeyClearEditText_deletecolor, -1);
preFixText = array2.getString(R.styleable.OneKeyClearEditText_prefixText);
preFixText = preFixText == null ? "" : preFixText;
array2.recycle();
initClearDrawable(context);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
restPaddingLeft();
}
public void setPrefixText(String mPrefixString) {
this.preFixText = mPrefixString;
invalidate();
}
/**
* 重新设置paddingLeft
*/
private void restPaddingLeft() {
if (OriginalPaddingLeft < 0) {
final int length = preFixText.length();
if (length <= 0) return;
final double paddingLeft = getPaint().measureText(preFixText);
OriginalPaddingLeft = getCompoundPaddingLeft();
setPadding((int) (OriginalPaddingLeft + paddingLeft), getPaddingTop(), getPaddingRight(), getPaddingBottom());
}
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
onDrawPrefix(canvas);
}
private void onDrawPrefix(Canvas canvas) {
final int length = preFixText.length();
if (length <= 0) return;
TextPaint paint = new TextPaint();
paint.setTextSize(getPaint().getTextSize());
paint.setColor(Color.parseColor("#888888"));
Paint paint_util = new Paint();
paint_util.setColor(Color.argb(30, 255, 0, 0));
int textY = getLineBounds(0, null);
int textX = OriginalPaddingLeft;
float prefixWidth = paint.measureText(preFixText);
float textWidth = getPaint().measureText(getText().toString());
if ((getGravity() & Gravity.LEFT) == Gravity.LEFT) {
/*getScrollX()单行移动时x滑动的距离 否则绘制前缀会看不到*/
textX = OriginalPaddingLeft + getScrollX();
} else if ((getGravity() & Gravity.RIGHT) == Gravity.RIGHT) {
textX = getScrollX() + OriginalPaddingLeft;
float rv = getMeasuredWidth() - (textWidth + getCompoundPaddingRight() + getCompoundPaddingLeft());
if (rv > 0) {
textX = (int) (textX + rv);
}
/* Paint paint_util2 = new Paint();
paint_util2.setColor(Color.argb(255, 0, 255, 255));
canvas.drawRect(0, 0, getRight() / 2 + getScrollX(), getMeasuredHeight(), paint_util2);*/
}
float fontHeight = paint.getFontMetrics().descent - paint.getFontMetrics().ascent;
float fontTop = textY + paint.getFontMetrics().ascent;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
canvas.drawRoundRect(textX, fontTop, textX + prefixWidth, fontHeight + fontTop, 10, 10, paint_util);
} else {
canvas.drawRect(textX, fontTop, textX + prefixWidth, fontHeight + fontTop, paint_util);
}
canvas.drawText(preFixText, textX, textY, paint);
}
private void log(String s) {
LogUtils.log(getClass(), "tag" + getTag() + s);
}
@SuppressLint("NewApi")
private void initClearDrawable(Context context) {
mClearDrawable = getCompoundDrawables()[2];// 获取EditText的DrawableRight,假如没有设置我们就使用默认的图片
if (mClearDrawable == null) {
mClearDrawable = getResources().getDrawable(R.drawable.btn_search_close);
}
if (drawableColor != -1) {
DrawableCompat.setTint(mClearDrawable, drawableColor);// 设置删除按钮的颜色和TextColor的颜色一致
}
mClearDrawable.setBounds(0, 0, (int) getTextSize(), (int) getTextSize());// 设置Drawable的宽高和TextSize的大小一致
setClearIconVisible(true);
// 设置焦点改变的监听
setOnFocusChangeListener(this);
// 设置输入框里面内容发生改变的监听
addTextChangedListener(this);
}
/**
* 设置清除图标的显示与隐藏，调用setCompoundDrawables为EditText绘制上去
*
* @param visible
*/
private void setClearIconVisible(boolean visible) {
Drawable right = visible ? mClearDrawable : null;
setCompoundDrawables(getCompoundDrawables()[0], getCompoundDrawables()[1], right, getCompoundDrawables()[3]);
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (mClearDrawable != null && event.getAction() == MotionEvent.ACTION_UP) {
int x = (int) event.getX();
// 判断触摸点是否在水平范围内
boolean isInnerWidth = (x > (getWidth() - getTotalPaddingRight()))
&& (x < (getWidth() - getPaddingRight()));
// 获取删除图标的边界，返回一个Rect对象
Rect rect = mClearDrawable.getBounds();
// 获取删除图标的高度
int height = rect.height();
int y = (int) event.getY();
// 计算图标底部到控件底部的距离
int distance = (getHeight() - height) / 2;
// 判断触摸点是否在竖直范围内(可能会有点误差)
// 触摸点的纵坐标在distance到（distance+图标自身的高度）之内，则视为点中删除图标
boolean isInnerHeight = (y > distance) && (y < (distance + height));
if (isInnerHeight && isInnerWidth) {
this.setText("");
}
}
return super.onTouchEvent(event);
}
/**
* 当输入框里面内容发生变化的时候回调的方法
*/
@Override
public void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
if (hasFocus) {
setClearIconVisible(text.length() > 0);
}
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
// TODO Auto-generated method stub
}
@Override
public void setEnabled(boolean enabled) {
super.setEnabled(enabled);
if (!enabled) {
setClearIconVisible(false);
}
}
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
}
@Override
public void onFocusChange(View v, boolean hasFocus) {
this.hasFocus = hasFocus;
if (hasFocus) {
setClearIconVisible(getText().length() > 0);
} else {
setClearIconVisible(false);
}
}
}
主要代码
onDrawPrefix 绘制前缀 考虑左右对齐
restPaddingLeft 重新设置左边距 给前缀留空间，好Canvas前缀