在android中的内联编辑文本 [英] Lined edit text in android

问题描述

任何想法都可以在android中创建像记事本一样的内衬编辑文本。

any idea to create a lined edit text like note pad, in android.

推荐答案

看起来很漂亮它在Android开发者网站上的教程中有所介绍。



http://developer.android.com/resources/tutorials/notepad/index.html [ ^ ]

By the looks of it it's covered in this tutorial on the android developer site.

http://developer.android.com/resources/tutorials/notepad/index.html[^]

import android.content.Context;

import android.graphics .Canvas;

导入android.graphics.Color;

导入android.graphics.Paint;

导入android.graphics.Rect;

导入android.graphics.Typeface;

导入android.util.AttributeSet;

导入android.util.Log;

import android.view.KeyEvent;



/ **

*情人节于2015年9月28日创建。

* /

公共类LinedEditText扩展android.support.v7.widget.AppCompatEditText {



private Rect rect;

private Paint paint;





public LinedEditText（Context context，AttributeSet attrs）{

super（context，attrs）;



rect = new Rect（）;

paint = new Paint（）;



paint.setStyle（Paint.Style.STROKE）;

paint.setColor（Color.parseColor（＃909090））;





setTypeface（context）;

}



public void setLineColor（int color）{

paint.setColor（颜色）;

}



@Override

protected void onDraw（Canvas canvas）{

int height = getHeight（）;

int lineHeight = getLineHeight（）;

int count = height / lineHeight;



//对于滚动的长文本

if（getLineCount（）>数）{

count = getLineCount（）;

}



//画第一行

int baseline = getLineBounds（0，rect）;



rect.left = getPaddingLeft（） - 100;

< br $>


rect.offset（5,5）;



for（int i = 0; i< count; i ++）{



Log.e（基线：，+基线）;





canvas.drawLine（rect.left，baseline + 40，rect.right，baseline + 40，paint）;



baseline + = getLineHeight（）;

}

super.onDraw（画布）;

}



@Override

public boolean onKeyPreIme（int keyCode，KeyEvent event）{

if（event.getKeyCode（）== KeyEvent.KEYCODE_BACK）{

dispatchKeyEvent（event）;

返回false;

}

返回super.onKeyPreIme（keyCode，event）;

}



private void setTypeface（Context context） ）{

this.setTypeface（Typeface.createFromAsset（context.getAssets（），avenirnextregular.ttf））;

}

}

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.util.Log;
import android.view.KeyEvent;

/**
* Created by Valentine on 9/28/2015.
*/
public class LinedEditText extends android.support.v7.widget.AppCompatEditText {

private Rect rect;
private Paint paint;


public LinedEditText(Context context, AttributeSet attrs) {
super(context, attrs);

rect = new Rect();
paint = new Paint();

paint.setStyle(Paint.Style.STROKE);
paint.setColor(Color.parseColor("#909090"));


setTypeface(context);
}

public void setLineColor(int color) {
paint.setColor(color);
}

@Override
protected void onDraw(Canvas canvas) {
int height = getHeight();
int lineHeight = getLineHeight();
int count = height / lineHeight;

// For long text with scrolling
if (getLineCount() > count) {
count = getLineCount();
}

// Draw first line
int baseline = getLineBounds(0, rect);

rect.left = getPaddingLeft() - 100;


rect.offset(5, 5);

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

Log.e("Base line : ", "" + baseline);


canvas.drawLine(rect.left, baseline + 40, rect.right, baseline + 40, paint);

baseline += getLineHeight();
}
super.onDraw(canvas);
}

@Override
public boolean onKeyPreIme(int keyCode, KeyEvent event) {
if (event.getKeyCode() == KeyEvent.KEYCODE_BACK) {
dispatchKeyEvent(event);
return false;
}
return super.onKeyPreIme(keyCode, event);
}

private void setTypeface(Context context) {
this.setTypeface(Typeface.createFromAsset(context.getAssets(), "avenirnextregular.ttf"));
}
}

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