Android 自定义AlertDialog的写法和弹出软键盘和覆盖状态栏

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);