标签：android-edittext android

我尝试在我的应用加载时默认在Edittext中添加10行.我为编辑文本定义了一个固定的高度.

无论我做什么,默认情况下它仅显示一行,并且当我按Enter键时会添加更多行.下面是我的代码.属性minHeight和minLines不起作用

<com.example.EditTextt
                android:id="@+id/editText1"
                android:layout_width="match_parent"
                android:layout_height="600dp"
                android:minLines="10"
                android:background="@android:color/transparent"
                android:fadingEdge="vertical"
                android:gravity="top"
                android:padding="10dp"
                android:scrollbars="vertical"
                android:textSize="22sp" >

                <requestFocus />
            </com.example.EditTextt>

参见下图.当我一次又一次按Enter键时,出现这些行.我希望这些行默认显示为记事本.

这是我的EditText的自定义类：
EditTextt.Java

package com.example;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.widget.EditText;

public class LineEditText extends EditText {
    private Rect mRect;
    private Paint mPaint;

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

    mRect = new Rect();
    mPaint = new Paint();
    mPaint.setStyle(Paint.Style.FILL);
    mPaint.setColor(getResources().getColor(R.color.Exzeoblue)); //SET YOUR OWN COLOR HERE
}

@Override
protected void onDraw(Canvas canvas) {

    // Gets the number of lines of text in the View.
    int count = getLineCount();

    // Gets the global Rectangle and Paint objects
    Rect r = mRect;
    Paint paint = mPaint;

    // Draws one line in the rectangle for every line of text in the EditText
    for (int i = 0; i < count; i++) {

        // Gets the baseline coordinates for the current line of text
        int baseline = getLineBounds(i, r);

        /*
         * Draws a line in the background from the left of the rectangle to the
         * right, at a vertical position one dip below the baseline, using the
         * "paint" object for details.
         */
        canvas.drawLine(r.left, baseline + 1, r.right, baseline + 1, paint);
        baseline += getLineHeight();//next line
    }

    // Finishes up by calling the parent method
    super.onDraw(canvas);
}
}

现在此代码一次只绘制一行.默认情况下,我无法绘制10条线

解决方法:

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.widget.EditText;

public class LineEditText extends EditText {
    private Rect mRect;
    private Paint mPaint;

    int initialCount = 0;

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

        mRect = new Rect();
        mPaint = new Paint();
        mPaint.setStyle(Paint.Style.FILL);
        mPaint.setColor(Color.BLUE);
        initialCount = getMinLines();
        setLines(initialCount);

    }

    @Override
    protected void onDraw(Canvas canvas) {

        // Gets the number of lines of text in the View.
        int count = getBaseline();
        // Gets the global Rectangle and Paint objects
        Rect r = mRect;
        Paint paint = mPaint;
        // Gets the baseline coordinates for the current line of text
        int baseline = getLineBounds(0, r);
        // Draws one line in the rectangle for every line of text in the EditText
        for (int i = 0; i < count; i++) {
            /*
             * Draws a line in the background from the left of the rectangle to the
             * right, at a vertical position one dip below the baseline, using the
             * "paint" object for details.
             */
            canvas.drawLine(r.left, baseline + 1, r.right, baseline + 1, paint);
            baseline += getLineHeight();//next line
        }

        // Finishes up by calling the parent method
        super.onDraw(canvas);
    }
}

标签：android-edittext,android
来源： https://codeday.me/bug/20191122/2060057.html

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