Android 控制软键盘显示、隐藏，并且添加软键盘的状态监听的终极解决办法

最近在开发中需要控制软键盘的显示隐藏，刚开始自定义了一个，感觉效果不是太理想，然后就写了一个软键盘的显示、隐藏的状态监听，特意在这里记录一下……

请看代码：

Step 1:

创建类

package xxx;import android.graphics.Rect;import android.view.View;import android.view.ViewTreeObserver;import java.util.LinkedList;import java.util.List;public class SoftKeyboardStateHelper implements ViewTreeObserver.OnGlobalLayoutListener {    public interface SoftKeyboardStateListener {        void onSoftKeyboardOpened(int keyboardHeightInPx);        void onSoftKeyboardClosed();    }    private final List<SoftKeyboardStateListener> listeners = new LinkedList<SoftKeyboardStateListener>();    private final View activityRootView;    private int        lastSoftKeyboardHeightInPx;    private boolean    isSoftKeyboardOpened;    public SoftKeyboardStateHelper(View activityRootView) {        this(activityRootView, false);    }    public SoftKeyboardStateHelper(View activityRootView, boolean isSoftKeyboardOpened) {        this.activityRootView     = activityRootView;        this.isSoftKeyboardOpened = isSoftKeyboardOpened;        activityRootView.getViewTreeObserver().addOnGlobalLayoutListener(this);    }    @Override    public void onGlobalLayout() {        final Rect r = new Rect();        //r will be populated with the coordinates of your view that area still visible.        activityRootView.getWindowVisibleDisplayFrame(r);        final int heightDiff = activityRootView.getRootView().getHeight() - (r.bottom - r.top);        if (!isSoftKeyboardOpened && heightDiff > 100) { // if more than 100 pixels, its probably a keyboard...            isSoftKeyboardOpened = true;            notifyOnSoftKeyboardOpened(heightDiff);        } else if (isSoftKeyboardOpened && heightDiff < 100) {            isSoftKeyboardOpened = false;            notifyOnSoftKeyboardClosed();        }    }    public void setIsSoftKeyboardOpened(boolean isSoftKeyboardOpened) {        this.isSoftKeyboardOpened = isSoftKeyboardOpened;    }    public boolean isSoftKeyboardOpened() {        return isSoftKeyboardOpened;    }    /**     * Default value is zero (0)     * @return last saved keyboard height in px     */    public int getLastSoftKeyboardHeightInPx() {        return lastSoftKeyboardHeightInPx;    }    public void addSoftKeyboardStateListener(SoftKeyboardStateListener listener) {        listeners.add(listener);    }    public void removeSoftKeyboardStateListener(SoftKeyboardStateListener listener) {        listeners.remove(listener);    }    private void notifyOnSoftKeyboardOpened(int keyboardHeightInPx) {        this.lastSoftKeyboardHeightInPx = keyboardHeightInPx;        for (SoftKeyboardStateListener listener : listeners) {            if (listener != null) {                listener.onSoftKeyboardOpened(keyboardHeightInPx);            }        }    }    private void notifyOnSoftKeyboardClosed() {        for (SoftKeyboardStateListener listener : listeners) {            if (listener != null) {                listener.onSoftKeyboardClosed();            }        }    }}

Step 2:

 在需要使用的类中，添加监听即可

 类实现方法

implements SoftKeyboardStateHelper.SoftKeyboardStateListener {...}

final SoftKeyboardStateHelper softKeyboardStateHelper = new SoftKeyboardStateHelper(view.findViewById(R.id.iv_product_detail_calculate));

softKeyboardStateHelper.addSoftKeyboardStateListener(this);

@Overridepublic void onSoftKeyboardOpened(int keyboardHeightInPx) {    if (!cDialog.isShowing()) {        InputMethodManager imm = (InputMethodManager) getCurActivity().getSystemService(Context.INPUT_METHOD_SERVICE);        imm.toggleSoftInput(InputMethodManager.SHOW_IMPLICIT, InputMethodManager.HIDE_NOT_ALWAYS);        imm.showSoftInput(getView(), InputMethodManager.SHOW_FORCED);    }}@Overridepublic void onSoftKeyboardClosed() {}