How to test OnClick in Appium Android Test

I am new to Appium. I try to test the OnClick function of a button. The Activity includes a Button and a TextView. When I click the Button, the text of the TextView changes (only 1 time - not toggle). However, the OnClick funtions does not work. This is my Test:

@Test
public void click_button() {
  AndroidElement text = (AndroidElement)((AndroidDriver)driver).findElementById(package_ + "text");
  AndroidElement button = (AndroidElement)((AndroidDriver)driver).findElementById(package_ + "button");
  String prevTest = text.getText();
  wait.until(ExpectedConditions.visibilityOf(button));

  //attemp 1
  button.click();
  driver.findElement(MobileBy.className("android.widget.Button")).click();

  //attempt 2
  Actions actions = new Actions(driver);
  actions.click(button);
  actions.perform();

  //attempt 3
  AndroidTouchAction touch = new AndroidTouchAction ((PerformsTouchActions) driver);
  touch.tap (TapOptions.tapOptions ()
          .withElement (ElementOption.element (button)))
          .perform ();
  String postTest = text.getText();
  assertNotEquals(prevTest, postTest);
}

This is my OnClick Function:

public void buttonClick(View view) {
    textView.setText("Clicked");
}

The test case fails. How do I fix this? Thanks in advance.