onClick事件不适用于Android

debugcn 发表于 Dev

浮点数

我有一个错误，很常见，因为我在互联网上看到了几种解决方案，所有解决方案都一样。我试图在我的android代码上执行此操作，但是它不起作用。

我有一个按钮。该按钮取决于微调框上的文字，应该使我转到页面或其他页面。

这是按钮的xml代码：

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/lancer"
    android:id="@+id/startButton"
    android:layout_alignParentRight="true"
    android:layout_alignParentBottom="true"
    android:clickable="true"
    android:onClick="jumpTo"/>

和它的java类：

public class Admin extends AppCompatActivity implements View.OnClickListener {

Spinner spinner_event;
Spinner spinner_activity;
Spinner spinner_wallpaper;
ArrayAdapter<CharSequence> adapter_wallpaper;
ArrayAdapter<CharSequence> adapter_event;
ArrayAdapter<CharSequence> adapter_activity;
Button startButton;
String textActivity;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.content_admin);


    spinner_event = (Spinner)findViewById(R.id.spinner_event);
    adapter_event = ArrayAdapter.createFromResource(this, R.array.events,android.R.layout.simple_spinner_dropdown_item);
    spinner_event.setAdapter(adapter_event);


    spinner_activity = (Spinner)findViewById(R.id.spinner_activity);
    adapter_activity = ArrayAdapter.createFromResource(this, R.array.activity,android.R.layout.simple_spinner_dropdown_item);
    spinner_activity.setAdapter(adapter_activity);


    spinner_wallpaper = (Spinner)findViewById(R.id.spinner_wallpaper);
    adapter_wallpaper = ArrayAdapter.createFromResource(this, R.array.wallpapers,android.R.layout.simple_spinner_dropdown_item);
    spinner_wallpaper.setAdapter(adapter_wallpaper);

    startButton = (Button)findViewById(R.id.startButton);
    startButton.setOnClickListener(this);
    }

@Override
public void onClick(View v) {
    textActivity = spinner_activity.getSelectedItem().toString();
    switch(v.getId()){

        case R.id.startButton:
        {
            if(textActivity == "Entree"){
                Intent i = new Intent(this, BadgeEntree.class);
                startActivity(i);
            }
            break;
        }
    }
}
}

我应该去我的BadgeEntree。两者都在AndroidManifest.xml上定义，我很迷路，似乎一切正常，但事实并非如此，我在做什么错？

谢谢您的帮助

IntelliJ Amiya

去掉

     startButton.setOnClickListener(this);
    }

@Override
public void onClick(View v) {
    textActivity = spinner_activity.getSelectedItem().toString();
    switch(v.getId()){

        case R.id.startButton:
        {
            if(textActivity == "Entree"){
                Intent i = new Intent(this, BadgeEntree.class);
                startActivity(i);
            }
            break;
        }
    }

做

首先，您应该致电if(textActivity.equals("Entree")而不是==

供参考

现在，当您单击按钮时，Android系统将调用活动的jumpTo（View）方法。为了使它起作用，该方法必须是公共的并且接受View作为其唯一参数。

public void jumpTo(View i)
{
textActivity = spinner_activity.getSelectedItem().toString();
if(textActivity.equals("Entree"){
                Intent i = new Intent(this, BadgeEntree.class);
                startActivity(i);
            }
            else
            {
            Log.d("Else","Wrong");
            }
}

最后

public class Admin extends AppCompatActivity  {

Spinner spinner_event;
Spinner spinner_activity;
Spinner spinner_wallpaper;
ArrayAdapter<CharSequence> adapter_wallpaper;
ArrayAdapter<CharSequence> adapter_event;
ArrayAdapter<CharSequence> adapter_activity;
Button startButton;
String textActivity;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    setContentView(R.layout.content_admin);


    spinner_event = (Spinner)findViewById(R.id.spinner_event);
    adapter_event = ArrayAdapter.createFromResource(this, R.array.events,android.R.layout.simple_spinner_dropdown_item);
    spinner_event.setAdapter(adapter_event);


    spinner_activity = (Spinner)findViewById(R.id.spinner_activity);
    adapter_activity = ArrayAdapter.createFromResource(this, R.array.activity,android.R.layout.simple_spinner_dropdown_item);
    spinner_activity.setAdapter(adapter_activity);


    spinner_wallpaper = (Spinner)findViewById(R.id.spinner_wallpaper);
    adapter_wallpaper = ArrayAdapter.createFromResource(this, R.array.wallpapers,android.R.layout.simple_spinner_dropdown_item);
    spinner_wallpaper.setAdapter(adapter_wallpaper);

    startButton = (Button)findViewById(R.id.startButton);

    }


public void jumpTo(View i)
{
textActivity = spinner_activity.getSelectedItem().toString();
if(textActivity.equals("Entree"){
                Intent i = new Intent(this, BadgeEntree.class);
                startActivity(i);
            }
            else
            {
            Log.d("Else","Wrong");
            }
}


}

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