一般 *android:windowSoftInputMode="adjustResize" *就能解决软键盘遮住输入框的问题，但是当Activity设为Full Screen这个设置就无效了。

下面这个类就能解决这个问题：

public class AndroidBugWorkaround {

// For more information, see https://code.google.com/p/android/issues/detail?id=5497

// To use this class, simply invoke assistActivity() on an Activity that already has its content view set.

public static void assistActivity (Activity activity) {

new AndroidBugWorkaround(activity);

}

private View mChildOfContent;

private int usableHeightPrevious;

private FrameLayout.LayoutParams frameLayoutParams;

private AndroidBugWorkaround(Activity activity) {

FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content);

mChildOfContent = content.getChildAt(0);

mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {

public void onGlobalLayout() {

possiblyResizeChildOfContent();

}

});

frameLayoutParams = (FrameLayout.LayoutParams) mChildOfContent.getLayoutParams();

}

private void possiblyResizeChildOfContent() {

int usableHeightNow = computeUsableHeight();

if (usableHeightNow != usableHeightPrevious) {

int usableHeightSansKeyboard = mChildOfContent.getRootView().getHeight();

int heightDifference = usableHeightSansKeyboard - usableHeightNow;

if (heightDifference > (usableHeightSansKeyboard/4)) {

// keyboard probably just became visible

frameLayoutParams.height = usableHeightSansKeyboard - heightDifference;

} else {

// keyboard probably just became hidden

frameLayoutParams.height = usableHeightSansKeyboard;

}

mChildOfContent.requestLayout();

usableHeightPrevious = usableHeightNow;

}

}

private int computeUsableHeight() {

Rect r = new Rect();

mChildOfContent.getWindowVisibleDisplayFrame(r);

return r.bottom;

}

}

只需要在Activity中的 onCreate() 方法中 setContentView() 后面添加

AndroidBugWorkaround.assistActivity(this);即可。

备注：computeUsableHeight() 方法返回值根据fitSystemWindows的设置值来决定，如果布局中fitsSystemWindows="false", return r.bottom; 如果fitsSystemWindows="true", return (r.bottom - r.top);