<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" > <!--注意名稱 --> <com.marine.study.LineEditText android:id="@+id/myEdit" android:layout_width="fill_parent" android:layout_height="wrap_content" style="?android:attr/textViewStyle" android:background="@null" android:textColor="@null" /> </LinearLayout> //請在這里添加您的包名 import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.util.AttributeSet; import android.widget.EditText; public class LineEditText extends EditText { private Paint mPaint; /** * @param context * @param attrs */ public LineEditText(Context context, AttributeSet attrs) { super(context, attrs); // TODO Auto-generated constructor stub mPaint = new Paint(); mPaint.setStyle(Paint.Style.STROKE); mPaint.setColor(Color.BLUE); } @Override public void onDraw(Canvas canvas) { super.onDraw(canvas); // 畫底線 canvas.drawLine(0,this.getHeight()-1, this.getWidth()-1, this.getHeight()-1, mPaint); } } import android.app.Activity; import android.content.Context; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Rect; import android.os.Bundle; import android.text.InputFilter; import android.util.AttributeSet; import android.widget.EditText; public class LineEditTextTest extends Activity { /** Called when the activity is first created. */ private EditText mEdit; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mEdit=(LineEditText)findViewById(R.id.myEdit); mEdit.setHint("從這里開始輸入..."); mEdit.setSingleLine(); mEdit.setFilters(new InputFilter[]{new InputFilter.LengthFilter(20)}); } }

轉(zhuǎn)載于:https://www.cnblogs.com/Joanna-Yan/p/4758303.html

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