Android 兩點縮放字體

Android 兩點縮放字體源碼工程下載：

免費下載地址在 http://linux.linuxidc.com/

用戶名與密碼都是www.linuxidc.com

具體下載目錄在 /pub/Android源碼集錦/2011年/11月/Android 兩點縮放字體/

MultiTouchTestActivity

2. package src.youer.text;
5. import java.io.InputStream;
7. import android.app.Activity;
8. import android.os.Bundle;
9. import android.widget.TextView;
11. public class MultiTouchTestActivity extends Activity
12. {
13. @Override
14. public void onCreate(Bundle savedInstanceState)
15. {
16. super.onCreate(savedInstanceState);
17. setContentView(R.layout.main);
18. TextView textView = (TextView) this.findViewById(R.id.text_view);
19. try
20. {
21. textView.setText(readText());
22. }
23. catch (Exception e)
24. {
25. e.printStackTrace();
26. }
27. float zoomScale = 0.5f;// 縮放比例
28. new ZoomTextView(textView, zoomScale);
29. }
31. /**
32. * 讀取txt
33. *
34. * @param str
35. * @return
36. * @throws Exception
37. */
38. public String readText() throws Exception
39. {
40. InputStream is = this.getClass()
41. .getResourceAsStream("/assets/text.txt");
42. int index = is.available();
43. byte data[] = new byte[index];
44. is.read(data);
45. return new String(data, "UTF-8");
46. }
47. }

ZoomTextView

1. package src.youer.text;
3. import android.widget.TextView;
5. public class ZoomTextView extends ZoomView<TextView>
6. {
7. /** 最小字體 */
8. public static final float MIN_TEXT_SIZE = 10f;
10. /** 最大子圖 */
11. public static final float MAX_TEXT_SIZE = 100.0f;
13. /** 縮放比例 */
14. float scale;
16. /** 設置字體大小 */
17. float textSize;
19. public ZoomTextView(TextView view, float scale)
20. {
21. super(view);
22. this.scale = scale;
23. textSize = view.getTextSize();
24. }
26. /**
27. * 放大
28. */
29. protected void zoomOut()
30. {
31. textSize += scale;
32. if (textSize > MAX_TEXT_SIZE)
33. {
34. textSize = MAX_TEXT_SIZE;
35. }
36. view.setTextSize(textSize);
37. }
39. /**
40. * 縮小
41. */
42. protected void zoomIn()
43. {
44. textSize -= scale;
45. if (textSize < MIN_TEXT_SIZE)
46. {
47. textSize = MIN_TEXT_SIZE;
48. }
49. view.setTextSize(textSize);
50. }
52. }