我已經在A.Class中聲明瞭一個按鈕,並且已將其設置爲禁用。accesing從一個類到另一個按鈕
public static Button s1=(Button)findViewById(R.id.sn1);
s1.setEnabled(false);
現在我想使在另一個類(B.class) 我試圖通過給 按鈕使該按鈕這個按鈕S2 = A.s1; 但它拋出一個錯誤,說「無法進行從活動類型的靜態引用非靜態方法findViewById(int)的」
請幫助我糾正錯誤
`First Class:
public class Mapper extends Activity implements OnClickListener
{
public static int sng=0,c=0;
public static double lat;
public static double lon;
public String placenametemp;
public Bundle savedInstanceState;
public static int chk= MapMe.check;
LocationManager locman1= MapMe.locman;
MyOwnLocationOverlay mylocover=MapMe.myLocationOverlay;
public MediaPlayer msong=MapMe.mp;
***public Button s1=(Button)findViewById(R.id.sn1);***
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Add Click listeners for all buttons
View firstButton = findViewById(R.id.geocode_button);
firstButton.setOnClickListener(this);
View secondButton = findViewById(R.id.latlong_button);
secondButton.setOnClickListener(this);
View thirdButton = findViewById(R.id.presentLocation_button);
thirdButton.setOnClickListener(this);
View selectsong=findViewById(R.id.song_select);
selectsong.setOnClickListener(this);
s1.setOnClickListener(this);
s1.setEnabled(false);
}
}
Second Class :
public class MapMe extends MapActivity implements LocationListener
{
Button s1=(Button)findViewById(R.id.sn1);
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE); // Suppress title bar to give more space
setContentView(R.layout.mapme);
updateGPSprefs();
// Set up location manager for determining present location of phone
locman = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
// Listener for GPS Status...
final GpsStatus.Listener onGpsStatusChange = new GpsStatus.Listener(){
public void onGpsStatusChanged(int event){
switch(event){
case GpsStatus.GPS_EVENT_STARTED:
// Started...
break;
case GpsStatus.GPS_EVENT_FIRST_FIX:
// First Fix...
Toast.makeText(MapMe.this, "GPS has First fix",
Toast.LENGTH_LONG).show();
break;
case GpsStatus.GPS_EVENT_STOPPED:
// Stopped...
break;
case GpsStatus.GPS_EVENT_SATELLITE_STATUS:
// Satellite update
break;
}
GpsStatus status = locman.getGpsStatus(null);
Iterable<GpsSatellite> satlist = status.getSatellites();
}
};
public void fu(double a,double b,double c,double d)
{
if((val==0)&&(val1==0))
{
mp.reset();
try {
check=1;
System.out.println("matched");
mp.setDataSource(link1);
mp.prepare();
mp.start();
Toast.makeText(MapMe.this, "playing", Toast.LENGTH_LONG).show();
System.out.println("Song button1");
***s1.setEnabled(true);***
System.out.println("Song button");
}
catch(Exception e)
{
}
}
`
時仍然得到錯誤不能使從類型活動」 – Sindu
你可以把這裏的靜態引用非靜態方法findViewById(INT)什麼樣的代碼你做你的A類和B類裏面? –
我已經添加了代碼Mapper.class,我已經聲明瞭Button s1,並且我已經將它設置爲false。我想在Mapme.class中的函數fu()下啓用它; – Sindu