Android学习笔记进阶19之给图片加边框

//设置颜色 public void setColour(int color){ co = color; } //设置边框宽度 public void setBorderWidth(int width){ borderwidth = width; }

具体实现：

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

main.xml

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

package xiaosi.imageborder; import android.content.Context; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.Rect; import android.util.AttributeSet; import android.widget.ImageView; public class myImageView extends ImageView { private int co; private int borderwidth; public myImageView(Context context) { super(context); } public myImageView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } public myImageView(Context context, AttributeSet attrs) { super(context, attrs); } //设置颜色 public void setColour(int color){ co = color; } //设置边框宽度 public void setBorderWidth(int width){ borderwidth = width; } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); // 画边框 Rect rec = canvas.getClipBounds(); rec.bottom--; rec.right--; Paint paint = new Paint(); //设置边框颜色 paint.setColor(co); paint.setStyle(Paint.Style.STROKE); //设置边框宽度 paint.setStrokeWidth(borderwidth); canvas.drawRect(rec, paint); } }

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