我正在嘗試制作一個簡單的應用程序，當您單擊按鈕文本時會出現該應用程序。但是我遇到了一個問題，當我點擊按鈕時什么也沒有發生。public class MainActivity extends AppCompatActivity { private TextView textView; private Button button; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textView = (TextView) findViewById(R.id.textView); textView.setMovementMethod(new ScrollingMovementMethod()); button = (Button) findViewById(R.id.button); View.OnClickListener ourOnClickListener = new View.OnClickListener() { @Override public void onClick(View v) { textView.setText("It real sent your at. Amounted all shy set why followed declared. Repeated of endeavor mr position kindness offering ignorant so up. Simplicity are melancholy preference considered saw companions. Disposal on outweigh do speedily in on. Him ham although thoughts entirely drawings. Acceptance unreserved."); } }; }}XML <Button android:id="@+id/button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginBottom="84dp" android:layout_marginEnd="8dp" android:layout_marginStart="8dp" android:text="Button" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" /> <TextView android:id="@+id/textView" android:layout_width="374dp" android:layout_height="331dp" android:layout_marginEnd="8dp" android:layout_marginStart="8dp" android:layout_marginTop="16dp" android:textSize="8sp" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" />
3 回答
交互式愛情
TA貢獻1712條經驗 獲得超3個贊
您正在啟動onClickListener，但您沒有將其附加到任何對象。嘗試將 附加onClickListener到您的按鈕，如下所示：
button.setOnClickListener(ourOnClickListener);
天涯盡頭無女友
TA貢獻1831條經驗 獲得超9個贊
單擊時什么也沒有發生，因為您還沒有onClickListener在按鈕上設置，您只定義了onClick. 在您的onCreate: 中 添加這一行button.setOnClickListener(ourOnClickListener)。
一只萌萌小番薯
TA貢獻1795條經驗 獲得超7個贊
解決方案：
取而代之的是：
View.OnClickListener ourOnClickListener = new View.OnClickListener() {
@Override
public void onClick(View v) {
textView.setText("It real sent your at. Amounted all shy set why followed declared. Repeated of endeavor mr position kindness offering ignorant so up. Simplicity are melancholy preference considered saw companions. Disposal on outweigh do speedily in on. Him ham although thoughts entirely drawings. Acceptance unreserved.");
}
};
像這樣寫：
button.setOnClickListener(new View.OnClickListener) {
@Override
public void onClick(View v) {
textView.setText("It real sent your at. Amounted all shy set why followed declared. Repeated of endeavor mr position kindness offering ignorant so up. Simplicity are melancholy preference considered saw companions. Disposal on outweigh do speedily in on. Him ham although thoughts entirely drawings. Acceptance unreserved.");
}
};
希望能幫助到你。
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