Android:Textview中的格线/水平线 [英] Android: Ruled/horizontal lines in Textview

问题描述

在Android中，我有一个TextView，其内容将是动态的.我想在每行文本之后显示一条水平线.我搜索了很多内容，并找到了EditText(如何使用格线/水平线在Android的EditText中对齐文本?

In Android, I have a TextView and its content will be dynamic. I want to show a horizontal line after each line of text. I have searched a lot and found it for EditText( How to use ruled/horizontal lines to align text in EditText in Android?). I was planing to draw dynamic TextView and a horizontal line under them. But I don't know how can I detect an end of line. Any help will be highly appreciated. I want to have the same effect as the attached image of How to use ruled/horizontal lines to align text in EditText in Android?

推荐答案

我正在使用在 EditText 中的每行文本之间绘制线条的技术，然后将创建 EditText 不可编辑，方法是将 setKeyListener(null)设置为自定义EditText对象，以便EditText像 TextView :)

I'm using the technique of drawing lines between each line of text in EditText and then I will make the EditText non-editable by setting setKeyListener(null) to the custom EditText object so that, the EditText acts like a TextView :)

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

    // we need this constructor for LayoutInflater
    public LinedEditText(Context context, AttributeSet attrs) {
        super(context, attrs);

        mRect = new Rect();
        mPaint = new Paint();
        mPaint.setStyle(Paint.Style.STROKE);
        mPaint.setColor(0x800000FF);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        int count = getLineCount();
        Rect r = mRect;
        Paint paint = mPaint;

        for (int i = 0; i < count; i++) {
            int baseline = getLineBounds(i, r);

            canvas.drawLine(r.left, baseline + 1, r.right, baseline + 1, paint);
        }

        super.onDraw(canvas);
    }
} 

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现在在需要 TextView 并使它不可编辑的地方使用 LinedEditText 类的对象.

---

Now use object of LinedEditText class where you need your TextView and make it non-editable.

public class HorizontalLine extends Activity{
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {   
        super.onCreate(savedInstanceState);
        setTitle("Android: Ruled/horizonal lines in Textview");

        LinearLayout ll = new LinearLayout(this);
        ll.setOrientation(LinearLayout.VERTICAL);
        LayoutParams textViewLayoutParams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

        LinedEditText et = new LinedEditText(this, null);
        et.setText("The name of our country is Bangladesh. I am proud of my country :)");
        et.setLayoutParams(textViewLayoutParams);
        et.setKeyListener(null);

        ll.addView(et);
        this.setContentView(ll);

    }

}

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et.setKeyListener(null)使EditText不可编辑，因此它就像TextView.

---

et.setKeyListener(null) makes the EditText non-editable so, it acts like a TextView.

如果仅使用 et.setKeyListener(null)，则它只是不监听键，而是 用户可以在EditText上看到光标.如果您不希望此光标通过添加以下行来禁用EditText:

If you use et.setKeyListener(null) only then it is just not listening to keys but user can see a cursor on the EditText. If you don't want this cursor just disable the EditText by adding this line:

 et.setEnabled(false);

这篇关于Android:Textview中的格线/水平线的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！