Android應用技巧之給文本加邊框

BorderTextViews.java

1. package xiaosi.BorderTextView;
3. import Android.content.Context;
4. import android.graphics.Canvas;
5. import android.graphics.Color;
6. import android.graphics.Paint;
7. import android.util.AttributeSet;
8. import android.widget.TextView;
10. public class BorderTextViews extends TextView
11. {
12. private Paint paint = null;
13. private int color = Color.GRAY;
14. public BorderTextViews(Context context, AttributeSet attrs)
15. {
16. super(context, attrs);
17. }
18. //設置邊框顏色
19. public void setPaintColor(int color){
20. this.color = color;
21. }
22. @Override
23. protected void onDraw(Canvas canvas)
24. {
25. super.onDraw(canvas);
26. paint = new Paint();
27. //給邊框設置顏色
28. paint.setColor(color);
29. //上
30. canvas.drawLine(0, 0, this.getWidth()-1, 0, paint);
31. //左
32. canvas.drawLine(0, 0, 0, this.getHeight()-1, paint);
33. //下
34. canvas.drawLine(0, this.getHeight()-1, this.getWidth()-1, this.getHeight()-1, paint);
35. //右
36. canvas.drawLine(this.getWidth()-1, 0, this.getWidth()-1, this.getHeight()-1, paint);
37. }
38. }

[java]

1. package xiaosi.BorderTextView;
3. import android.app.Activity;
4. import android.graphics.Color;
5. import android.os.Bundle;
7. public class BorderTextViewActivity extends Activity {
8. /** Called when the activity is first created. */
9. private BorderTextViews borderTextView = null;
10. @Override
11. public void onCreate(Bundle savedInstanceState) {
12. super.onCreate(savedInstanceState);
13. setContentView(R.layout.main);
14. borderTextView = (BorderTextViews)findViewById(R.id.Border);
15. borderTextView.setPaintColor(Color.GRAY);
16. }
17. }

[java]

1. <?xml version="1.0" encoding="utf-8"?>
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3. android:layout_width="fill_parent"
4. android:layout_height="fill_parent"
5. android:orientation="vertical"
6. android:background="#CCFF66">
8. <xiaosi.BorderTextView.BorderTextViews
9. android:id="@+id/Border"
10. android:layout_width="wrap_content"
11. android:layout_height="wrap_content"
12. android:textColor="#C71585"
13. android:layout_marginTop="20dp"
14. android:padding="10dp"
15. android:layout_gravity="center"
16. android:text="在畫布上畫邊框" />
18. </LinearLayout>