Android阻止键盘关闭

Question

是否可以阻止用户关闭软键盘。换句话说，当我的活动可见时，屏幕上始终可以使用键盘（始终）。这可能吗？如果是这样，你将如何实现它？

Answer 1

你需要重写onKeyUp()和onKeyDown()方法，如下面，

@Override 
public boolean onKeyUp(int keyCode, KeyEvent event) { 
    if (keyCode == KeyEvent.KEYCODE_BACK)  
    { 
     ((InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE)).toggleSoftInput 
       (InputMethodManager.SHOW_FORCED,InputMethodManager.HIDE_IMPLICIT_ONLY); 
    } 
    return super.onKeyUp(keyCode, event); 
} 

@Override 
public boolean onKeyDown(int keyCode, KeyEvent event) { 
    if (keyCode == KeyEvent.KEYCODE_BACK)  
    { 
     ((InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE)).toggleSoftInput 
       (InputMethodManager.SHOW_FORCED, InputMethodManager.HIDE_IMPLICIT_ONLY); 
    } 
    return super.onKeyDown(keyCode, event); 
} 

您也可以尝试在两种方式，通过使用OnEditorActionListener，看看下面的代码，

EditText txtMyEdit = (EditText) findViewById(R.id.txtEdit); 
txtMyEdit.setOnEditorActionListener(new OnEditorActionListener() 
{ 
    public boolean onEditorAction(TextView v, int actionId, KeyEvent event) 
    { 
     if (actionId == EditorInfo.IME_ACTION_DONE) 
     { 
      // your additional processing... 
      return true; 
     } 
     else 
     { 
      return false; 
     } 
    } 
}); 

Answer 2

这应该强制键盘显示与焦点无关：

InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE); 
imm.hideSoftInputFromWindow(yourViewObject.getWindowToken(), 0); 
imm.toggleSoftInput(InputMethodManager.SHOW_FORCED,0);