Android 软键盘的显示和隐藏

public class KeyboardUtils {

public static void showKeyboard(View view) {
InputMethodManager imm = (InputMethodManager) view.getContext()
.getSystemService(Context.INPUT_METHOD_SERVICE);
if (imm != null) {
view.requestFocus();
imm.showSoftInput(view, 0);
}
}

public static void hideKeyboard(View view){
InputMethodManager imm = (InputMethodManager) view.getContext()
.getSystemService(Context.INPUT_METHOD_SERVICE);
if (imm != null) {
imm.hideSoftInputFromWindow(view.getWindowToken(),0);
}
}
public static void toggleSoftInput(View view){
InputMethodManager imm = (InputMethodManager) view.getContext()
.getSystemService(Context.INPUT_METHOD_SERVICE);
if (imm != null) {
imm.toggleSoftInput(0,0);
}
}
}