Android--去除EditText边框，添加下划线

转载：

????? http://blog.sina.com.cn/s/blog_59b30fd40100q56c.html

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//请在这里添加您的包名   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;              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);              //      画底线           canvas.drawLine(0,this.getHeight()-1,  this.getWidth()-1, this.getHeight()-1, mPaint);       }   }   //请在这里添加您的包名 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; 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); // 画底线 canvas.drawLine(0,this.getHeight()-1, this.getWidth()-1, this.getHeight()-1, mPaint); } } 其次:设置LineEditTextJava代码  <?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"       >   <!--注意名称 -->   <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>   <?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" > <!--注意名称 --> <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> 其中background，可以设置成其他颜色等textColor不一定要是null，可以设置字体颜色 最后：应用LineEditText Java代码  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 {              private EditText mEdit;       @Override       public void onCreate(Bundle savedInstanceState) {           super.onCreate(savedInstanceState);           setContentView(R.layout.main);                      mEdit=(LineEditText)findViewById(R.id.myEdit);           mEdit.setHint("从这里开始输入...");           mEdit.setSingleLine();           mEdit.setFilters(new InputFilter[]{new InputFilter.LengthFilter(20)});       }          } 

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