Android學習筆記進階19之給圖片加邊框

 

//設定顏色<br />public void setColour(int color){<br />co = color;<br />}<br />//設定邊框寬度<br />public void setBorderWidth(int width){</p><p>borderwidth = width;<br />}

 

具體實現：

package xiaosi.imageborder;</p><p>import android.app.Activity;<br />import android.graphics.Color;<br />import android.os.Bundle;</p><p>public class ImageBorderActivity extends Activity {<br /> /** Called when the activity is first created. */<br />private myImageView image = null;<br />private myImageView image1 = null;<br /> @Override<br /> public void onCreate(Bundle savedInstanceState) {<br /> super.onCreate(savedInstanceState);<br /> setContentView(R.layout.main);</p><p> image = (myImageView)findViewById(R.id.iamge);<br /> image.setColour(Color.YELLOW);<br /> image.setBorderWidth(10);<br /> image1 = (myImageView)findViewById(R.id.iamge1);<br /> image1.setColour(Color.GREEN);<br /> image1.setBorderWidth(5);<br /> }<br />}

 

 

main.xml

<LinearLayout<br /> xmlns:android="http://schemas.android.com/apk/res/android"<br /> android:background="@drawable/playerbackground"<br /> android:layout_width="fill_parent"<br /> android:layout_height="fill_parent"><br /> <xiaosi.imageborder.myImageView<br /> android:id="@+id/iamge"<br /> android:layout_width="200px"<br /> android:layout_height="230px"<br /> android:layout_alignParentRight="true"<br /> android:src="@drawable/v"<br /> android:layout_centerInParent="true"<br /> android:layout_marginRight="3px"<br /> /><br /> <xiaosi.imageborder.myImageView<br /> android:id="@+id/iamge1"<br /> android:layout_width="200px"<br /> android:layout_height="230px"<br /> android:layout_alignParentRight="true"<br /> android:src="@drawable/v"<br /> android:layout_centerInParent="true"<br /> android:layout_marginRight="3px"<br /> /><br /></LinearLayout>

 

package xiaosi.imageborder;</p><p>import android.content.Context;<br />import android.graphics.Canvas;<br />import android.graphics.Paint;<br />import android.graphics.Rect;<br />import android.util.AttributeSet;<br />import android.widget.ImageView;</p><p>public class myImageView extends ImageView {</p><p>private int co;<br />private int borderwidth;<br />public myImageView(Context context) {<br />super(context);<br />}<br />public myImageView(Context context, AttributeSet attrs,<br />int defStyle) {<br />super(context, attrs, defStyle);<br />}</p><p>public myImageView(Context context, AttributeSet attrs) {<br />super(context, attrs);<br />}<br /> //設定顏色<br />public void setColour(int color){<br />co = color;<br />}<br />//設定邊框寬度<br />public void setBorderWidth(int width){</p><p>borderwidth = width;<br />}<br />@Override<br />protected void onDraw(Canvas canvas) {<br />super.onDraw(canvas);<br />// 畫邊框<br />Rect rec = canvas.getClipBounds();<br />rec.bottom--;<br />rec.right--;<br />Paint paint = new Paint();<br />//設定邊框顏色<br />paint.setColor(co);<br />paint.setStyle(Paint.Style.STROKE);<br />//設定邊框寬度<br />paint.setStrokeWidth(borderwidth);<br />canvas.drawRect(rec, paint);<br />}<br />}<br />

 

 

原始碼下載：點擊開啟連結