android - 从一项 Activity 移动时如何以编程方式打开键盘

Question

当我从第一个 Activity 转到第二个 Activity 时，我试图打开键盘。主要 Activity 中有两个按钮1) 如果点击“NotShowKeyboard”按钮，它将打开第二个没有键盘的 java Activity 2) 如果单击“ShowKeyboard”按钮，则它将打开带有键盘的 second.java Activity 和带有焦点的 EitdText 但问题是我不知道该怎么做。我放了一些示例顶部显示键盘，但在“ShowKeyboard”按钮上单击键盘打开并立即消失。

主要.java:

    NotShowKeyboard.setOnTouchListener(new View.OnTouchListener() {
        public boolean onTouch(View v, MotionEvent event) {
            if (event.getAction() == MotionEvent.ACTION_DOWN) {
            }

            if (event.getAction() == MotionEvent.ACTION_UP) {
                bundle.putBoolean("show", false);
                Intent start = new Intent(Main.this, Start.class);
                start.putExtras(bundle);
                startActivity(start);
            }

            return false;
        }
    });

    ShowKeyboard.setOnTouchListener(new View.OnTouchListener() {
        public boolean onTouch(View v, MotionEvent event) {
            if (event.getAction() == MotionEvent.ACTION_DOWN) {
            }

            if (event.getAction() == MotionEvent.ACTION_UP) {
                bundle.putBoolean("show", true);
                Intent start = new Intent(Main.this, Start.class);
                start.putExtras(bundle);
                startActivity(start);
            }

            return false;
        }
    });

第二个.java:

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
    setContentView(R.layout.start);
    i = getIntent();
    extras = i.getExtras();
    search = (EditText) findViewById(R.id.start_edit);
    search.addTextChangedListener(myTextWatcher);
    if((extras.getBoolean("show"))==true) {
    ((InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE)).toggleSoftInput(InputMethodManager.SHOW_FORCED, InputMethodManager.HIDE_IMPLICIT_ONLY);
    }
    //getting all stuff like buttons imageViews etc.. 
}

当 NotShowButton Clicked 然后这应该打开:

当 ShowButton 单击时，这应该打开:

Answer 1

隐藏键盘:

InputMethodManager imm = (InputMethodManager)getSystemService(
  Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(myEditText.getWindowToken(), 0);

用于显示键盘:

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