Android自己定义视图（带下划线的TextView）

沉舟侧畔千帆进，病树前头万木春。这篇文章主要讲述Android自己定义视图：带下划线的TextView相关的知识，希望能为你提供帮助。

package com.francis.underlinetextviewtest; import android.content.Context; import android.content.res.Resources; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.util.AttributeSet; import android.util.Log; import android.util.TypedValue; import android.widget.TextView; /** * Created by Francis on 14-10-13. */ public class UnderlineTextView extends TextView {private final Paint mPaint = new Paint(); private int mUnderlineHeight = 0; public UnderlineTextView(Context context) { this(context, null); }public UnderlineTextView(Context context, AttributeSet attrs) { this(context, attrs, 0); }public UnderlineTextView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); init(context, attrs); }private void init(Context context, AttributeSet attrs) { Resources r = getResources(); // mUnderlineHeight == 6 mUnderlineHeight = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 2, r.getDisplayMetrics()); }@Override public void setPadding(int left, int top, int right, int bottom) { super.setPadding(left, top, right, bottom + mUnderlineHeight); }@Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); // Draw the underline the same color as the textmPaint.setColor(getTextColors().getDefaultColor()); // 对角线上的两点。
canvas.drawRect(0, getHeight() - mUnderlineHeight, getWidth(), getHeight(), mPaint); } }

加入布局文件：

< com.francis.underlinetextviewtest.UnderlineTextView android:text=" @string/hello_world" android:layout_width=" wrap_content" android:layout_height=" wrap_content" android:textStyle=" bold" android:textColor=" #FFDDDDDD" />

【Android自己定义视图（带下划线的TextView）】