当我单击地图中的某个项目时,会出现一个显示"路由到"的正按钮.问题,如何从正面按钮开始活动？
我也这样用,
dialog.setPositiveButton("Tampilkan Rute", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int Button) {
Intent i = new Intent(this, Rute.class);
startActivity(i);
}
});
开始进入Rute类但它总是说"删除参数匹配intent()"然后我不知道该怎么做.
这是我的代码
@Override
protected boolean onTap(int index) {
OverlayItem item = items.get(0);
AlertDialog.Builder dialog = new AlertDialog.Builder(mContext);
dialog.setTitle(item.getTitle());
dialog.setMessage(item.getSnippet());
dialog.setPositiveButton("Tampilkan Rute", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int Button) {
Intent i = new Intent(this, Rute.class);
startActivity(i);
}
});
dialog.setNegativeButton("Kembali", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int Button) {
dialog.cancel();
}
}); …很抱歉问一个奇怪的问题,我是java的新手,我会制作一个Android应用程序,它可以从c = a + b进行计数,但它总是返回nullpointerexception
这是我的代码
public class Kreasi extends Activity {
// Inisialisasi
private EditText e1;
private EditText e2;
private Spinner s1;
private Button b1;
private Button b2;
private TextView t1;
private TextView t2;
private TextView t3;
private TextView t4;
private TextView t5;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.kreasi);
// INISIALISASI VARIABEL
e1 = (EditText)findViewById(R.id.isiharga);
e1 = (EditText)findViewById(R.id.isilaba);
s1 = (Spinner)findViewById(R.id.spin);
b1 = (Button)findViewById(R.id.process);
b2 = (Button)findViewById(R.id.reset);
t1 = (TextView)findViewById(R.id.hMax);
t2 = (TextView)findViewById(R.id.angPokok);
t3 = (TextView)findViewById(R.id.angSewa);
t4 = …