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(),);