点击EditText之外的区域隐藏键盘

SampleActivity.java

import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.view.MotionEvent;
import android.view.View;
import android.view.inputmethod.InputMethodManager;
import android.widget.EditText;

public class SampleActivity extends AppCompatActivity {

    @Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        if (ev.getAction() == MotionEvent.ACTION_DOWN) {
            View currentFocus = getCurrentFocus();
            if (shouldHideSoftInput(currentFocus, ev)) {
                InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
                if (imm != null) {
                    imm.hideSoftInputFromWindow(currentFocus.getWindowToken(), 0);
                }
                currentFocus.clearFocus();
            }
        }
        return super.dispatchTouchEvent(ev);
    }

    private boolean shouldHideSoftInput(View view, MotionEvent event) {
        if (view != null && (view instanceof EditText)) {
            int[] leftTop = {0, 0};
            view.getLocationInWindow(leftTop);
            int left = leftTop[0];
            int top = leftTop[1];
            int bottom = top + view.getHeight();
            int right = left + view.getWidth();
            return !(event.getRawX() > left && event.getRawX() < right
                    && event.getRawY() > top && event.getRawY() < bottom);
        }
        return false;
    }
}