Question

我的代码出了什么问题？ if if语句为10按钮10活动。我上传了我的代码图片。我的代码出了什么问题？ if if语句为10按钮10活动。我上传了我的代码图片。？

    public void showGreeting (View view) {
    String button_text;
    button_text = ((Button) view).getText().toString();
    if (button_text.equals("Chapter 2 and 6")) {

    } else (button_text.equals("Chapter 7 Part 1"))
    {
        Intent intent = new Intent(this, SecindActivity.class);
        startActivity(intent);
    }

    else (button_text.equals("Chapter 7 Part 2"))
    {
        Intent intent = new Intent(this, ThirdActivity.class);
        startActivity(intent);
    }

    else (button_text.equals("Chapter 8 and Chapter 9 Part 1"))
    {
        Intent intent = new Intent(this, FourthActivity.class);
        startActivity(intent);
    }

    else (button_text.equals("Chapter 9 Part 2"))
    {
        Intent intent = new Intent(this, FifthActivity.class);
        startActivity(intent);
    }

    else (button_text.equals("Chapter 10"))
    {
        Intent intent = new Intent(this, SixthActivity.class);
        startActivity(intent);
    }

    else (button_text.equals("Chapter 11 Part 1"))

    {
        Intent intent = new Intent(this, SeventhActivity.class);
        startActivity(intent);
    }

    else (button_text.equals("Chapter 11 Part 2 and Chapter 12 Part 1"))
    {
        Intent intent = new Intent(this, EighthActivity.class);
        startActivity(intent);
    }

    else (button_text.equals("Chapter 12 Part 2"))
    {
        Intent intent = new Intent(this, NinthActivity.class);
        startActivity(intent);
    }
    else if (button_text.equals("Credit")) {
        Intent intent = new Intent(this, TenthActivity.class);
        startActivity(intent);
    }
}

Answer 1

试试这个：

isUserAuthenticated

public class MainActivity extends ActionBarActivity { private Button button1; //create the 10 buttons here public void showGreetings(Button button) { Intent intent; switch (button.getId()) { case R.id.button: intent = new Intent(this, SecindActivity.class); startActivity(intent); break; case R.id.button2: intent = new Intent(this, ThirdActivity.class); startActivity(intent); break; case R.id.button3: intent = new Intent(this, FourthActivity.class); startActivity(intent); break; case R.id.button4: intent = new Intent(this, FifthActivity.class); startActivity(intent); break; case R.id.button5: intent = new Intent(this, SixthActivity.class); startActivity(intent); break; case R.id.button6: intent = new Intent(this, SeventhActivity.class); startActivity(intent); break; case R.id.button7: intent = new Intent(this, EighthActivity.class); startActivity(intent); break; case R.id.button8: intent = new Intent(this, NinthActivity.class); startActivity(intent); break; case R.id.button9: intent = new Intent(this, TenthActivity.class); startActivity(intent); break; case R.id.button10: intent = new Intent(this, Eleventh_Activity.class); startActivity(intent); break; } } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); button1 = (Button) findViewById(R.id.button); button1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { showGreetings((Button) view); } }); button2 = (Button) findViewById(R.id.button2); button2.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { showGreetings((Button) view); } }); //do the same with the other 9 buttons }中获取的ID是您为xml中的按钮指定的ID。您可以用这种方式进行比较，而不是使用很多其他if语句。

否则，您也可以执行以下操作，使其更容易，更清晰。

b.getId()

你需要再做一次这样的活动：

public class MainActivity extends ActionBarActivity {

private Button button1;
private Button button2;
//create the other 8 buttons here

public void showGreetings(Button button) {
    Intent intent = new Intent(this, SecindActivity.class);
    switch (button.getId()) {
        case R.id.button:
            intent.putExtra("POSITION", 1);
            startActivity(intent);
            break;
        case R.id.button2:
            intent.putExtra("POSITION", 2);
            startActivity(intent);
            break;
        case R.id.button3:
            intent.putExtra("POSITION", 3);
            startActivity(intent);
            break;
        case R.id.button4:
            intent.putExtra("POSITION", 4);
            startActivity(intent);
            break;
        case R.id.button5:
            intent.putExtra("POSITION", 5);
            startActivity(intent);
            break;
        case R.id.button6:
            intent.putExtra("POSITION", 6);
            startActivity(intent);
            break;
        case R.id.button7:
            intent.putExtra("POSITION", 7);
            startActivity(intent);
            break;
        case R.id.button8:
            intent.putExtra("POSITION", 8);
            startActivity(intent);
            break;
        case R.id.button9:
            intent.putExtra("POSITION", 9);
            startActivity(intent);
            break;
        case R.id.button10:
            intent.putExtra("POSITION", 10);
            startActivity(intent);
            break;

    }
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    button1 = (Button) findViewById(R.id.button);
    button1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            showGreetings((Button) view);
        }
    });
    button2 = (Button) findViewById(R.id.button);
    button2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            showGreetings((Button) view);
        }
    });

    //do the same with the other 9 buttons
}
}

我的代码出了什么问题？ if if语句为10按钮10活动

1 个答案: