侦听键盘操作

作者：追风剑情 发布于：2015-7-26 17:19 分类：Android 

  1. package com.example.androidtest;
  2.  
  3. import android.app.Activity;
  4. import android.os.Bundle;
  5. import android.view.KeyEvent;
  6. import android.view.Menu;
  7. import android.view.MenuItem;
  8. import android.widget.Toast;
  9.  
  10. public class UIActivityActivity extends Activity {
  11.  
  12. 	@Override
  13. 	protected void onCreate(Bundle savedInstanceState) {
  14. 		super.onCreate(savedInstanceState);
  15. 		setContentView(R.layout.activity_uiactivity);
  16. 	}
  17. 	
  18. 	/**
  19. 	 * @return true:告诉系统您已经处理完此事件并且系统不要再作进一步的处理。
  20. 	 */
  21. 	@Override
  22. 	public boolean onKeyDown(int keyCode, KeyEvent event)
  23. 	{
  24. 		switch (keyCode)
  25. 		{
  26. 		case KeyEvent.KEYCODE_DPAD_CENTER:
  27. 			Toast.makeText(getBaseContext(), "Center was clicked", Toast.LENGTH_LONG).show();
  28. 			break;
  29. 		case KeyEvent.KEYCODE_DPAD_LEFT:
  30. 			Toast.makeText(getBaseContext(), "Left arrow was clicked", Toast.LENGTH_LONG).show();
  31. 			break;
  32. 		case KeyEvent.KEYCODE_DPAD_RIGHT:
  33. 			Toast.makeText(getBaseContext(), "Right arrow was clicked", Toast.LENGTH_LONG).show();
  34. 			break;
  35. 		case KeyEvent.KEYCODE_DPAD_UP:
  36. 			Toast.makeText(getBaseContext(), "Up arrow was clicked", Toast.LENGTH_LONG).show();
  37. 			break;
  38. 		case KeyEvent.KEYCODE_DPAD_DOWN:
  39. 			Toast.makeText(getBaseContext(), "Down arrow was clicked", Toast.LENGTH_LONG).show();
  40. 			break;
  41. 		}
  42. 		return false;
  43. 	}
  44. 	
  45. 	@Override
  46. 	public boolean onKeyUp(int keyCode, KeyEvent event)
  47. 	{
  48. 		switch (keyCode)
  49. 		{
  50. 		
  51. 		}
  52. 		return false;
  53. 	}
  54. }

标签: Android

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