眾所皆知，android的手機五花八門，其輸入法的型態也是一樣，像Sony的手機會有這個隱藏鍵盤的圖示，紅色框框處。
那該如何偵測鍵盤是否已經按下了隱藏鍵盤圖示呢？找了一些論譠和資源，發現並沒有提供，唯一的線索就是顯示軟體鍵盤時，整理的View的配置會有改變，看來是得從這邊下手了。
做法很簡單，只要Activity或Fragment所繫結的Root view layout動個手腳就可以了。假如App的畫面是佔滿螢幕畫面的話，可以參考下列的作法。
實作一個Custom View，假設Root view layout是RelativeLayout
/** * Input {@link RelativeLayout} * <p> * 為了能夠偵測鍵盤在顯示時，被按下隱藏鍵盤圖示(EX: sony的手機, htc sensation, etc....)後，做一些處理的自訂RelativeLayout * * @author Jay Lee * */ public class KeyboardAwareRelativeLayout extends RelativeLayout { private OnKeyboardHiddenListener mCallBack; /** * 鍵盤被隱藏的Listener * */ public interface OnKeyboardHiddenListener { /** * 當鍵盤被點選穩藏時要執行的動作 */ public void onKeyboardHidden(); } private boolean mKeyboardVisible = false; /** * Construct a KeyboardAwareRelativeLayout object. * * @param context * Context */ public KeyboardAwareRelativeLayout(Context context) { super(context); } /** * Construct a KeyboardAwareRelativeLayout object. * * @param context * Context * @param attrs * AttributeSet */ public KeyboardAwareRelativeLayout(Context context, AttributeSet attrs) { super(context, attrs); } /** * Construct a KeyboardAwareRelativeLayout object. * * @param context * Context * @param attrs * AttributeSet * @param defStyle * Default style */ public KeyboardAwareRelativeLayout(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); } public boolean isKeyboardVisible() { return mKeyboardVisible; } /** * 定義當隱藏鍵盤的Listener * * @param listener * OnKeyboardHiddenListener */ public void setOnKeyboardHiddenListener(OnKeyboardHiddenListener listener) { mCallBack = listener; } private void updateKeyboardVisible() { // 取得此View的高度 int viewHeight = getHeight(); // 取得手機螢幕實際高度 int displayHeight = getDisplayHeight(); // 計算時，需要包含Status Bar，而Status Bar的高度為25dp // 需要利用程式動態計算出來 Resources r = getResources(); int maxStatusBarHeight = Math.round(TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 25f, r.getDisplayMetrics())); // 當View的高度加上Status Bar的高度比螢幕小時，代表軟體鍵盤目前顯示在畫面上 boolean oldValue = mKeyboardVisible; mKeyboardVisible = (viewHeight + maxStatusBarHeight < displayHeight); if (oldValue != mKeyboardVisible && !mKeyboardVisible && mCallBack != null) { mCallBack.onKeyboardHidden(); } } private int getDisplayHeight() { WindowManager windowManager = (WindowManager) getContext().getSystemService(Context.WINDOW_SERVICE); Display display = windowManager.getDefaultDisplay(); return display.getHeight(); } /** * 如果在onLayout時無法辨識鍵盤被關閉時，也可以透過設定mKeyboardVisible的屬性 * 並且在mKeyboardVisible為false時，執行mCallBack的動作 */ public void setKeyboardVisible(boolean mKeyboardVisible) { this.mKeyboardVisible = mKeyboardVisible; if (!mKeyboardVisible && mCallBack != null ) { mCallBack.onKeyboardHidden(); } } @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { super.onLayout(changed, l, t, r, b); if (!this.isInEditMode()) { updateKeyboardVisible(); } } }
在Activity或Fragment裡面，將此View實作OnKeyboardHiddenListener
public class MyActivity extends Activity { // Views private KeyboardAwareRelativeLayout mRootLayout; // Listeners private KeyboardAwareRelativeLayout.OnKeyboardHiddenListener mRootLayoutOnKeyboardHiddenListener = new KeyboardAwareRelativeLayout.OnKeyboardHiddenListener() { @Override public void onKeyboardHidden() { // TODO 在這邊撰寫當軟體鍵盤隱藏時，要做的處理 } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mRootLayout = (KeyboardAwareRelativeLayout) view.findViewById(R.id.root); mRootLayout.setOnKeyboardHiddenListener(mRootLayoutOnKeyboardHiddenListener); } }
最後在AndroidManifest.xml裡面的<activity>節點裡面，加入android:windowSoftInputMode="adjustResize"
http://stackoverflow.com/q/3425932/1004367
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