private void showMyDialog(int layoutId){      AlertDialog myDialog = new      AlertDialog.Builder(context).create();      myDialog.show();      Window window = myDialog.getWindow();      window.setContentView(layoutId);      window.setGravity(Gravity.CENTER);      window.setLayout(LayoutParams.MATCH_PARENT,          LayoutParams.WRAP_CONTENT); }

方法 2 

private void showMyDialog(int layoutId){     LayoutInflater inflater = LayoutInflater.from(mContext);     View fourView = inflater.inflate(layoutId, null);     AlertDialog myDialog = new                 AlertDialog.Builder(context).create();     myDialog.show();     myDialog.getWindow().setContentView(fourView); }

以上二种方法都可以自定义Dialog,并且效果还不错，但是如果Dialog里面有EditText就会遇到一个问题，怎么样 

都打不开软键盘，也就无法输入，如果碰到这种情况的话，请看第三种写法： 

方法 3 

private void showMyDialog(int layoutId){     LayoutInflater inflater = LayoutInflater.from(mContext);     View fourView = inflater.inflate(layoutId, null);     AlertDialog myDialog = new     AlertDialog.Builder(context).create();     //加上以下这句代码     myDialog.setView(((Activity)         mContext).getLayoutInflater().inflate(layoutId, null))     myDialog.show();     myDialog.getWindow().setContentView(fourView); }

全屏覆盖状态栏显示加上以下代码： 

window.setType(WindowManager.LayoutParams.TYPE_APPLICATION_PANEL); window.setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); window.setLayout(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT);

弹出软键盘：

window.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE); InputMethodManager inputManager = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE); inputManager.showSoftInput(passwordEt, InputMethodManager.SHOW_FORCED);

隐藏软键盘：

getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN); InputMethodManager inputManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); inputManager.hideSoftInputFromWindow(mPasswordInputEt.getWindowToken(),0);