如果文字转到下一行,我输入EditText
时会以编程方式创建一个EditText
,然后我想在EditText
内绘制水平线。我怎样才能实现它?
答案 0 :(得分:2)
根据Raghunandan评论,您可以在项目中使用此类
<强> LinedEditText.java 强>
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.widget.EditText;
public class LinedEditText extends EditText {
private Paint mPaint = new Paint();
public LinedEditText(Context context) {
super(context);
initPaint();
}
public LinedEditText(Context context, AttributeSet attrs) {
super(context, attrs);
initPaint();
}
public LinedEditText(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
initPaint();
}
private void initPaint() {
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setColor(0x80000000);
}
@Override protected void onDraw(Canvas canvas) {
int left = getLeft();
int right = getRight();
int paddingTop = getPaddingTop();
int paddingBottom = getPaddingBottom();
int paddingLeft = getPaddingLeft();
int paddingRight = getPaddingRight();
int height = getHeight();
int lineHeight = getLineHeight();
int count = (height-paddingTop-paddingBottom) / lineHeight;
for (int i = 0; i < count; i++) {
int baseline = lineHeight * (i+1) + paddingTop;
canvas.drawLine(left+paddingLeft, baseline, right-paddingRight, baseline, mPaint);
}
super.onDraw(canvas);
}
}
在布局文件中使用它
<yourpackagename.LinedEditText
android:id="@+id/editText2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:background="@android:color/transparent"
android:ems="10"
android:gravity="top"
android:hint="@string/note_body"
android:inputType="textMultiLine"
android:lineSpacingExtra="4dp"
android:textColor="#000000"
android:textColorHint="#e2e2e2" />