Android中给图片加边框
16lz
2021-01-24
需要重写ImageView
1 | //设置颜色 |
2 | public void setColour(int color){ |
3 | co = color; |
4 | } |
5 | //设置边框宽度 |
6 | public void setBorderWidth(int width){ |
7 | |
8 | borderwidth = width; |
9 | } |
具体实现：
01 | package xiaosi.imageborder; |
02 | |
03 | import android.app.Activity; |
04 | import android.graphics.Color; |
05 | import android.os.Bundle; |
06 | |
07 | public class ImageBorderActivity extends Activity { |
08 | /** Called when the activity is first created. */ |
09 | private myImageView image = null; |
10 | private myImageView image1 = null; |
11 | @Override |
12 | public void onCreate(Bundle savedInstanceState) { |
13 | super.onCreate(savedInstanceState); |
14 | setContentView(R.layout.main); |
15 | |
16 | image = (myImageView)findViewById(R.id.iamge); |
17 | image.setColour(Color.YELLOW); |
18 | image.setBorderWidth(10); |
19 | image1 = (myImageView)findViewById(R.id.iamge1); |
20 | image1.setColour(Color.GREEN); |
21 | image1.setBorderWidth(5); |
22 | } |
23 | } |
main.xml
01 | <LinearLayout |
02 | xmlns:android="http://schemas.android.com/apk/res/android" |
03 | android:background="@drawable/playerbackground" |
04 | android:layout_width="fill_parent" |
05 | android:layout_height="fill_parent"> |
06 | <xiaosi.imageborder.myImageView |
07 | android:id="@+id/iamge" |
08 | android:layout_width="200px" |
09 | android:layout_height="230px" |
10 | android:layout_alignParentRight="true" |
11 | android:src="@drawable/v" |
12 | android:layout_centerInParent="true" |
13 | android:layout_marginRight="3px" |
14 | /> |
15 | <xiaosi.imageborder.myImageView |
16 | android:id="@+id/iamge1" |
17 | android:layout_width="200px" |
18 | android:layout_height="230px" |
19 | android:layout_alignParentRight="true" |
20 | android:src="@drawable/v" |
21 | android:layout_centerInParent="true" |
22 | android:layout_marginRight="3px" |
23 | /> |
24 | </LinearLayout> |
01 | package xiaosi.imageborder; |
02 | |
03 | import android.content.Context; |
04 | import android.graphics.Canvas; |
05 | import android.graphics.Paint; |
06 | import android.graphics.Rect; |
07 | import android.util.AttributeSet; |
08 | import android.widget.ImageView; |
09 | |
10 | public class myImageView extends ImageView { |
11 | |
12 | private int co; |
13 | private int borderwidth; |
14 | public myImageView(Context context) { |
15 | super(context); |
16 | } |
17 | public myImageView(Context context, AttributeSet attrs, |
18 | int defStyle) { |
19 | super(context, attrs, defStyle); |
20 | } |
21 | |
22 | public myImageView(Context context, AttributeSet attrs) { |
23 | super(context, attrs); |
24 | } |
25 | //设置颜色 |
26 | public void setColour(int color){ |
27 | co = color; |
28 | } |
29 | //设置边框宽度 |
30 | public void setBorderWidth(int width){ |
31 | |
32 | borderwidth = width; |
33 | } |
34 | @Override |
35 | protected void onDraw(Canvas canvas) { |
36 | super.onDraw(canvas); |
37 | // 画边框 |
38 | Rect rec = canvas.getClipBounds(); |
39 | rec.bottom--; |
40 | rec.right--; |
41 | Paint paint = new Paint(); |
42 | //设置边框颜色 |
43 | paint.setColor(co); |
44 | paint.setStyle(Paint.Style.STROKE); |
45 | //设置边框宽度 |
46 | paint.setStrokeWidth(borderwidth); |
47 | canvas.drawRect(rec, paint); |
48 | } |
49 | } |
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