OnBackPressed并打开一个软键盘 [英] OnBackPressed with a SoftKeyboard open

问题描述

我想在打开软键盘时完成一项活动，我想覆盖该软键盘的back事件并完成该活动.

I want to finish an activity when the soft keyboard is open, I want to override the back event of the soft keyboard and finish the activity.

我正在使用它，但是不起作用，有什么主意吗?

I'm using this but it's not working , any Idea ?

 public boolean onKeyPreIme(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK &&
                event.getAction() == KeyEvent.ACTION_UP) {
            this.finish();
            return false;
        }
        return super.dispatchKeyEvent(event);
    }

推荐答案

onKeyDown()和onBackPressed()在这种情况下不起作用.您必须使用onKeyPreIme.

onKeyDown() and onBackPressed() doesn't work for this case. You have to use onKeyPreIme.

最初，您必须创建扩展EditText的自定义编辑文本.然后，您必须实现控制KeyEvent.KEYCODE_BACK的onKeyPreIme方法.此后，一按就足以解决您的问题.该解决方案非常适合我.

Initially, you have to create custom edit text that extends EditText. And then you have to implement onKeyPreIme method which controls KeyEvent.KEYCODE_BACK. After this, one back press enough for solve your problem. This solution works for me perfectly.

CustomEditText.java

CustomEditText.java

public class CustomEditText extends EditText {

    Context context;

    public CustomEditText(Context context, AttributeSet attrs) {
        super(context, attrs);
        this.context = context;
    }

    @Override
    public boolean onKeyPreIme(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_BACK) {
            // User has pressed Back key. So hide the keyboard
            InputMethodManager mgr = (InputMethodManager)         
                context.getSystemService(Context.INPUT_METHOD_SERVICE);
            mgr.hideSoftInputFromWindow(this.getWindowToken(), 0);
            // TODO: Hide your view as you do it in your activity
        }
        return false;
}

使用您的XML

<com.YOURAPP.CustomEditText
     android:id="@+id/CEditText"
     android:layout_height="wrap_content"
     android:layout_width="match_parent"/> 

在您的活动中

public class MainActivity extends Activity {
   private CustomEditText editText;

   @Override
   public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      editText = (CustomEditText) findViewById(R.id.CEditText);
   }
}

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