要解决这个问题，你必须首先使用Edittext的setOnFocusChangeListener

edittext.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                if (!hasFocus) {
                    Log.d("focus", "focus loosed");
                    // Do whatever you want here
                } else {
                    Log.d("focus", "focused");
                }
            }
        });

然后你需要做的是覆盖dispatchTouchEvent在活动中包含的编辑文本见下面的代码

@Override
public boolean dispatchTouchEvent(MotionEvent event) {
    if (event.getAction() == MotionEvent.ACTION_DOWN) {
        View v = getCurrentFocus();
        if ( v instanceof EditText) {
            Rect outRect = new Rect();
            v.getGlobalVisibleRect(outRect);
            if (!outRect.contains((int)event.getRawX(), (int)event.getRawY())) {
                Log.d("focus", "touchevent");
                v.clearFocus();
                InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                imm.hideSoftInputFromWindow(v.getWindowToken(), 0);
            }
        }
    }
    return super.dispatchTouchEvent(event);
}

现在会发生的是当用户点击外部时首先dispatchTouchEvent会被调用它会从编辑文本中清除焦点现在你的OnFocusChangeListener会被调用焦点已经改变了现在在这里你可以做任何你想做的希望它能起作用

我在活动中实现了dispatchTouchEvent来做到这一点:

private EditText mEditText;
private Rect mRect = new Rect();
@Override
public boolean dispatchTouchEvent(MotionEvent ev) {
    final int action = MotionEventCompat.getActionMasked(ev);

    int[] location = new int[2];
    mEditText.getLocationOnScreen(location);
    mRect.left = location[0];
    mRect.top = location[1];
    mRect.right = location[0] + mEditText.getWidth();
    mRect.bottom = location[1] + mEditText.getHeight();

    int x = (int) ev.getX();
    int y = (int) ev.getY();

    if (action == MotionEvent.ACTION_DOWN && !mRect.contains(x, y)) {
        InputMethodManager input = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
        input.hideSoftInputFromWindow(mEditText.getWindowToken(), 0);
    }
    return super.dispatchTouchEvent(ev);
}

我测试过了，效果完美!

你可以很容易地覆盖onKey()事件在活动和片段隐藏键盘。

@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {

    if (event.getAction() == MotionEvent.ACTION_DOWN) {
        if (keyCode == event.KEYCODE_ENTER) {

            intiateLoginProcess();
            InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
            imm.hideSoftInputFromWindow(getWindow().getCurrentFocus()
                    .getWindowToken(), 0);

            return true;
        }
    }
    return false;
}

嘿，伙计们，我有这个问题的简单解决方案，这个解决方案可以用于简单的注册或登录形式。 我的解决方案与我在ios setontouch监听主视图中实现的解决方案相同

添加ID到你的主相对布局android: ID ="@+ ID /mainlayout"

并将此代码添加到您的活动中

  RelativeLayout mainLayout = (RelativeLayout)findViewById(R.id.mainlayout);
  mainLayout.setOnTouchListener(new OnTouchListener() {

            @Override
            public boolean onTouch(View v, MotionEvent event) {
                // TODO Auto-generated method stub
                 Log.d("Json Response", "Touch outside");
                  InputMethodManager inputMethodManager = (InputMethodManager)  MainActivity.this.getSystemService(Activity.INPUT_METHOD_SERVICE);
                    inputMethodManager.hideSoftInputFromWindow(MainActivity.this.getCurrentFocus().getWindowToken(), 0);
                return false;
            }
        });

你可以实现View。onClickListener和重写onClick方法，并将这个onClickListener设置为布局

ConstraintLayout constraintLayout;
public class MainActivity extends AppCompatActivity implements View.OnClickListener{
@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        constraintLayout = findViewById(R.id.layout);
        constraintLayout.setOnClickListener(this);
}
@Override
    public void onClick(View v) {
        if(v.getId()==R.id.layout){
            InputMethodManager inm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
            inm.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(),0);
        }
    }

只需在类中添加此代码 @Overide

public boolean dispatchTouchEvent(MotionEvent ev) {
    View view = getCurrentFocus();
    if (view != null && (ev.getAction() == MotionEvent.ACTION_UP || ev.getAction() == MotionEvent.ACTION_MOVE) && view instanceof EditText && !view.getClass().getName().startsWith("android.webkit.")) {
        int scrcoords[] = new int[2];
        view.getLocationOnScreen(scrcoords);
        float x = ev.getRawX() + view.getLeft() - scrcoords[0];
        float y = ev.getRawY() + view.getTop() - scrcoords[1];
        if (x < view.getLeft() || x > view.getRight() || y < view.getTop() || y > view.getBottom())
            ((InputMethodManager)this.getSystemService(Context.INPUT_METHOD_SERVICE)).hideSoftInputFromWindow((this.getWindow().getDecorView().getApplicationWindowToken()), 0);
    }
    return super.dispatchTouchEvent(ev);
}