Android 判斷軟鍵盤的狀態（顯示，隱藏）

先上截圖，有圖有真相：

自定義RelativeLayout

1. package com.demo.softkeyboard;
3. import Android.content.Context;
4. import android.util.AttributeSet;
5. import android.widget.RelativeLayout;
7. public class KeyboardListenRelativeLayout extends RelativeLayout {
9. private static final String TAG = KeyboardListenRelativeLayout.class.getSimpleName();
11. public static final byte KEYBOARD_STATE_SHOW = -3;
12. public static final byte KEYBOARD_STATE_HIDE = -2;
13. public static final byte KEYBOARD_STATE_INIT = -1;
15. private boolean mHasInit = false;
16. private boolean mHasKeyboard = false;
17. private int mHeight;
19. private IOnKeyboardStateChangedListener onKeyboardStateChangedListener;
21. public KeyboardListenRelativeLayout(Context context) {
22. super(context);
23. }
24. public KeyboardListenRelativeLayout(Context context, AttributeSet attrs) {
25. super(context, attrs);
26. }
28. public KeyboardListenRelativeLayout(Context context, AttributeSet attrs, int defStyle) {
29. super(context, attrs, defStyle);
30. }
32. public void setOnKeyboardStateChangedListener(IOnKeyboardStateChangedListener onKeyboardStateChangedListener) {
33. this.onKeyboardStateChangedListener = onKeyboardStateChangedListener;
34. }
36. @Override
37. protected void onLayout(boolean changed, int l, int t, int r, int b) {
38. super.onLayout(changed, l, t, r, b);
39. if(!mHasInit) {
40. mHasInit = true;
41. mHeight = b;
42. if(onKeyboardStateChangedListener != null) {
43. onKeyboardStateChangedListener.onKeyboardStateChanged(KEYBOARD_STATE_INIT);
44. }
45. } else {
46. mHeight = mHeight < b ? b : mHeight;
47. }
49. if(mHasInit && mHeight > b) {
50. mHasKeyboard = true;
51. if(onKeyboardStateChangedListener != null) {
52. onKeyboardStateChangedListener.onKeyboardStateChanged(KEYBOARD_STATE_SHOW);
53. }
54. }
55. if(mHasInit && mHasKeyboard && mHeight == b) {
56. mHasKeyboard = false;
57. if(onKeyboardStateChangedListener != null) {
58. onKeyboardStateChangedListener.onKeyboardStateChanged(KEYBOARD_STATE_HIDE);
59. }
60. }
61. }
63. public interface IOnKeyboardStateChangedListener {
64. public void onKeyboardStateChanged(int state);
65. }
66. }

1. package com.demo.softkeyboard;
3. import com.demo.softkeyboard.KeyboardListenRelativeLayout.IOnKeyboardStateChangedListener;
5. import android.app.Activity;
6. import android.os.Bundle;
7. import android.view.View;
8. import android.widget.EditText;
9. import android.widget.TextView;
11. /**
12. * 軟鍵盤監聽Demo
13. * @author qiaoning
14. *
15. */
16. public class SoftKeyboardListenDemoActivity extends Activity {
18. private EditText editText;
19. KeyboardListenRelativeLayout relativeLayout;
21. @Override
22. public void onCreate(Bundle savedInstanceState) {
23. super.onCreate(savedInstanceState);
24. setContentView(R.layout.main);
26. relativeLayout = (KeyboardListenRelativeLayout) findViewById(R.id.keyboardRelativeLayout);
27. editText = (EditText) findViewById(R.id.editText);
29. relativeLayout.setOnKeyboardStateChangedListener(new IOnKeyboardStateChangedListener() {
31. public void onKeyboardStateChanged(int state) {
32. switch (state) {
33. case KeyboardListenRelativeLayout.KEYBOARD_STATE_HIDE://軟鍵盤隱藏
34. editText.setVisibility(View.VISIBLE);
35. break;
36. case KeyboardListenRelativeLayout.KEYBOARD_STATE_SHOW://軟鍵盤顯示
37. editText.setVisibility(View.GONE);
38. break;
39. default:
40. break;
41. }
42. }
43. });
44. }
45. }

1. <?xml version="1.0" encoding="utf-8"?>
2. <com.demo.softkeyboard.KeyboardListenRelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
3. android:id="@+id/keyboardRelativeLayout"
4. android:layout_width="fill_parent"
5. android:layout_height="fill_parent">
6. <ScrollView android:layout_width="fill_parent"
7. android:layout_height="fill_parent"
8. android:layout_alignParentLeft="true"
9. android:layout_alignParentTop="true"
10. android:fillViewport="true">
11. <LinearLayout android:layout_width="fill_parent"
12. android:layout_height="wrap_content"
13. android:orientation="vertical">
14. <EditText android:id="@+id/editText"
15. android:layout_width="fill_parent"
16. android:layout_height="wrap_content"/>
17. </LinearLayout>
18. </ScrollView>
19. </com.demo.softkeyboard.KeyboardListenRelativeLayout>

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具體下載目錄在 /2012年資料/6月/30日/Android 判斷軟鍵盤的狀態（顯示，隱藏）