Android ScrollView的使用

核心提示：1. package com.Aina.Android;2.3. import android.app.Activity;4. import android.os.Bundle;5. import android.os.Handler;6. import android.view.KeyEvent;7. import

1. package com.Aina.Android;

2.

3. import android.app.Activity;

4. import android.os.Bundle;

5. import android.os.Handler;

6. import android.view.KeyEvent;

7. import android.view.View;

8. import android.widget.Button;

9. import android.widget.LinearLayout;

10. import android.widget.ScrollView;

11. import android.widget.TextView;

12.

13. public class Test_ScrollView extends Activity {

14. /** Called when the activity is first created. */

15. private LinearLayout mLayout;

16. private ScrollView sView;

17. private final Handler mHandler = new Handler();

18.

19. @Override

20. public void onCreate(Bundle savedInstanceState) {

21. super.onCreate(savedInstanceState);

22. setContentView(R.layout.main);

23. // 创建一个线性布局

24. mLayout = (LinearLayout) this.findViewById(R.id.LinearLayout);

25. // 创建一个ScrollView对象

26. sView = (ScrollView) this.findViewById(R.id.ScrollView);

27. Button mBtn = (Button) this.findViewById(R.id.Button);

28. mBtn.setOnClickListener(mClickListener);// 添加点击事件监听

29. }

30.

31. public boolean onKeyDown(int keyCode, KeyEvent event){

32. Button b = (Button) this.getCurrentFocus();

33. int count = mLayout.getChildCount();

34. Button bm = (Button) mLayout.getChildAt(count-1);

35.

36. if(keyCode==KeyEvent.KEYCODE_DPAD_UP && b.getId()==R.id.Button){

37. bm.requestFocus();

38. return true;

39. }else if(keyCode==KeyEvent.KEYCODE_DPAD_DOWN && b.getId()==bm.getId()){

40. this.findViewById(R.id.Button).requestFocus();

41. return true;

42. }