Question

我有一个数字计数器程序。我为Plus，Minus和Clear定义了3个按钮。当我使用清除按钮清除TextView时它很好。但在使用Plus和Minus之后它就是Continuation last counter。那是我的代码。请帮助我。

public class CounterActivity extends Activity {

private Button   btnPlus;
private Button   btnMinus;
private Button   btnClear;
private TextView txtCounter;

int              counter = 0;


@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.counter_menu);

    btnPlus = (Button) findViewById(R.id.btnPlus);
    btnMinus = (Button) findViewById(R.id.btnMinus);
    btnClear = (Button) findViewById(R.id.btnClear);
    txtCounter = (TextView) findViewById(R.id.txtCounter);

    btnPlus.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View view) {
            counter++;
            txtCounter.setText(counter + "");
        }
    });

    btnMinus.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View view) {
            counter--;
            txtCounter.setText(counter + "");
        }
    });

    btnClear.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            txtCounter.setText(0 + "");
        }
    });
}
}

Answer 1

按如下方式更改您的清除按钮curl: (51) SSL: certificate verification failed (result: 5) Error: Failed to download resource "chromedriver" Download failed: https://chromedriver.storage.googleapis.com/2.22/chromedriver_mac32.zip方法：

export SSL_CERT_FILE=""
brew install something

一个简单的计数器

1 个答案: