透明状态栏导致windowSoftInputMode：adjustResize失效问题

当我们通过下面代码：

getWindow().getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN |View.SYSTEM_UI_FLAG_LIGHT_STATUS_BAR);

设置状态栏透明，当界面存在EditText时，在activity里面设置windowSoftInputMode:adjustResize 无效，软键盘依然会遮挡住EditText的焦点位置。

通过下面方式可以解决，大致解决思路是，通过监听视图树的变化，然后把界面滑动到软键盘的上面。

public class WindowSoftModeAdjustResizeExecutor {
// 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.

// CREDIT TO Joseph Johnson (http://stackoverflow.com/users/341631/joseph-johnson) for publishing the original Android solution on stackoverflow.com

public static void assistActivity(Activity activity) {
new WindowSoftModeAdjustResizeExecutor(activity);
}

private View mChildOfContent;
private int usableHeightPrevious;
private FrameLayout.LayoutParams frameLayoutParams;

private WindowSoftModeAdjustResizeExecutor(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;

frameLayoutParams.height = usableHeightSansKeyboard - heightDifference;

mChildOfContent.requestLayout();
usableHeightPrevious = usableHeightNow;
}
}

private int computeUsableHeight() {
Rect r = new Rect();
mChildOfContent.getWindowVisibleDisplayFrame(r);
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
return (r.bottom - r.top);
}
return r.bottom;
}
}

然后在setContentView()方法之后调用WindowSoftModeAdjustResizeExecutor.(this) 就ok了。