Question

在android sdk中，我编写了2个按钮，带我进入2种不同的布局。但是，只有我编程的第一个才能工作，而第二个则完全没有。如果你能抓到我错过的任何东西，我会提供代码，请告诉我你的想法。这是我在Android上运行的第一个应用程序之一，所以尽可能简单地解释你的建议。

代码：

  public class MainActivity extends Activity {
        private final String T = "Settings";
        @Override 
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            settingsButton();
        }
        private final String T2 = "ManualAdd";
        protected void onCreate1(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            feederButton();
        }


        private void settingsButton() {
            Button messageButton = (Button) findViewById(R.id.Settings);
            View.OnClickListener myListener = new View.OnClickListener() {@
                Override
                public void onClick(View v) {
                    Log.i(T, "You clicked the settings button!");
                    startActivity(new Intent(MainActivity.this, SettingsActivity.class));
                }
            };
            messageButton.setOnClickListener(myListener);
        }
        private void feederButton() {
            Button feedButton = (Button) findViewById(R.id.AddFeeder);
            View.OnClickListener my2ndListener = new View.OnClickListener() {
                public void onClick(View v) {
                    Log.i(T2, "You clicked the add button!");
                    startActivity(new Intent(MainActivity.this, ManualAdd.class));
                }
            };
            feedButton.setOnClickListener(my2ndListener);
        }
    }

Answer 1

您无法为拥有的每个按钮设置不同的onCreate()方法。只有一个按钮工作的原因是因为仅 onCreate()方法才被调用。系统不知道onCreate1()。要让两个按钮都正常工作

@Override 
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    settingsButton();
}

到

@Override 
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    settingsButton();
    feederButton();
}

您可以从源代码中完全删除onCreate1()，现在已经过时了。

最好按照官方的Android "First App"教程进行操作。

Answer 2

试试此代码

public class MainActivity extends Activity {

    Button Your_Button_Name;
    Button Your_Button_Name;
    Activity activity;

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.Your_Layout_Name);

        //In (R.id.Your_Btn_Name) that's the name that you gave your button in the XML
        activity = this;
        Your_Button_Name = (Button) findViewById(R.id.Your_Btn_Name);
        Your_Button_Name = (Button) findViewById(R.id.Your_Btn_Name);
        Your_Button_Name.setOnClickListener(listener);
        Your_Button_Name.setOnClickListener(listener);

    }

    private View.OnClickListener listener = new View.OnClickListener() {
        public void onClick(View v) {

            switch (v.getId()) {
                case (R.id.Your_Btn_Name):
                    startActivity(new Intent(MainActivity.this, Your_Layout_Name.class));

                    break;

                case (R.id.Your_Btn_Name):
                    startActivity(new Intent(MainActivity.this, Your_Layout_Name.class));

                    break;
            }
        }
    };
}

在我的Android布局中有2个按钮，只有1个可以工作

2 个答案: