Question

这个问题似乎微不足道,但我无法找到任何 n和简单的解决办法。

I ve got an activity with a EditText and a software back Button which simply calls finish() method of activity. When I click on the EditText, there is a soft keyboard shown to input the text.

I want to achieve the following functionality when clicking the back button (exactly the same as it is with the hardware back button):

- when the Keyboard is hidden, the onClick method should call finish() to end the activity

- when the Keyboard is shown, the onClick methond should hide the keyboard.

是否有这样做的简单方法?

Answer 1

Keyboard Pasition finding if keyboard is hidden or not? getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);

Selection of Back Button 1)First you have to detect the back key in functionality : here is code: start changing the ‘Back’ button, behavior, you need to override the onKeyDown() method and than check if the desired button has been pressed:

  //Override the onKeyDown method  
    @Override  
    public boolean onKeyDown(int keyCode, KeyEvent event)  
    {  
        //replaces the default  Back  button action  
        if(keyCode==KeyEvent.KEYCODE_BACK)  
        {  
            //do whatever you want the  Back  button to do  
            //as an example the  Back  button is set to start a new Activity named  NewActivity   
            this.startActivity(new Intent(YourActivity.this,NewActivity.class));  
        }  
        return true;  
    }

至少是安伯。

@Override  
public void onBackPressed()  
{  
    //do whatever you want the  Back  button to do  
    //as an example the  Back  button is set to start a new Activity named  NewActivity   
    this.startActivity(new Intent(YourActivity.this,NewActivity.class));  

    return;  
}

友情链接