javascript - 用于清除 TextView 文本的 Android Studio 按钮

Question

我想制作一个按钮来清除 TextView 的文本。我正在使用 Android Studio。

ImageButton ImageButton3;
TextView TextView26;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    ImageButton3.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {

            TextView.text="";
        }
    });

Answer 1

您必须实例化 TextView :

ImageButton ImageButton3;
TextView TextView26;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    TextView26 = (TextView) findViewById(R.id.<your text view id>);

    ImageButton3.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {

            TextView26.setText=("");
        }
    });