1. 重寫EditText
-
- public class LinedEditText extends EditText {
- private Paint linePaint;
- private float margin;
- private int paperColor;
-
- public LinedEditText(Context paramContext, AttributeSet paramAttributeSet) {
- super(paramContext, paramAttributeSet);
- this.linePaint = new Paint();
- }
-
- protected void onDraw(Canvas paramCanvas) {
- paramCanvas.drawColor(this.paperColor);
- int i = getLineCount();
- int j = getHeight();
- int k = getLineHeight();
- int m = 1 + j / k;
- if (i < m)
- i = m;
- int n = getCompoundPaddingTop();
- paramCanvas.drawLine(0.0F, n, getRight(), n, this.linePaint);
- for (int i2 = 0;; i2++) {
- if (i2 >= i) {
- setPadding(10 + (int) this.margin, 0, 0, 0);
- super.onDraw(paramCanvas);
- paramCanvas.restore();
- return;
- }
- n += k;
- paramCanvas.drawLine(0.0F, n, getRight(), n, this.linePaint);
- paramCanvas.save();
- }
- }
-
- }
-
複製代碼
這段代碼,並不複雜沒有加註釋,學過Java的同窗應該不會吃力。 2.在佈局文件中使用
-
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- xmlns:tools="http://schemas.android.com/tools"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:orientation="vertical" >
-
- <com.example.storetest.LinedEditText
- android:id="@+id/et1"
- android:layout_width="fill_parent"
- android:layout_height="200dp"
- android:gravity="top"
- android:inputType="textMultiLine" />
-
- </LinearLayout>
-
複製代碼
注意:使用EditText控件時,再也不使用EditText前綴,而是重寫以後完整路徑的包名+類名(如com.example.storetest.LinedEditText)。 3.在使用時與正常調用EditText時一致。 |