关于输入法的弹出

Eidtext这个控件默认是你点击了它获得焦点之后就会自动地弹出软键盘，前提是你在竖屏的时候。但横盘的时候，不会自动弹出弹

出软键盘了。 

隐藏软件盘

法一. InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);

imm.hideSoftInputFromWindow(editText.getWindowToken(), 0);//开始时隐藏输入法

法二：AndroidManifet.xml中对Activity进行设置。如：android:windowSoftInputMode="stateUnchanged|adju//stPan"

手动弹出软键盘

 InputMethodManager im = ((InputMethodManager) getSystemService(INPUT_METHOD_SERVICE));
         im.showSoftInput(tv, 0);

写在某个点击事件中

  public void onClick(View arg0) {
                 // TODO Auto-generated method stub
                 InputMethodManager im = ((InputMethodManager) getSystemService(INPUT_METHOD_SERVICE));

                 if (im.showSoftInput(tv, InputMethodManager.SHOW_FORCED)) {
                     System.out.println(" return is true fullscreenmode"
                             + im.isFullscreenMode());
                 } else {
                     System.out.println(" return is not true");
                 }
 };

在AlertDialog中点击输入框可显示输入法，但是要选中输入法还得添加：
alertDialog.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM);

官方：http://developer.android.com/reference/android/app/Dialog.html

Often you will want to have a Dialog display on top of the current input method, because there is no reason for it to accept text. You can do this by setting the WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM window flag (assuming your Dialog takes input focus, as it the default) with the following code:

为了防止弹出输入法时 把后面的背景挤变形，可以在Manifest里添加：

android:windowSoftInputMode="adjustPan|stateHidden"