我有一组单选按钮，如下面的代码按钮所示。当我单击每个单选按钮时，我想要一个不同的对话框，如下图所示。每个单选按钮一个。这些应该在对话框中。我该怎么做呢？ 最后，我只需要生成这些自定义对话框。任何人都可以帮助我如何做到这一点？
我也得到一个空指针异常。我该如何解决？
public class Availability extends Activity implements OnClickListener,
OnCheckedChangeListener {
ToggleButton override;
TextView status;
Button Overridestatus;
CharSequence[] choice = { "RemoteOffice", "Office", "Personal mobile",
"Home", "Mobile", "Temporary", "Do not Disturb",
"Working Remotely", "Non work day", "Work Day" };
RadioGroup timeperiod;
TimePicker timePicker;
int hour, minute;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.availability);
override = (ToggleButton) findViewById(R.id.tbOver);
override.setOnClickListener(this);
status = (TextView) findViewById(R.id.tvstatus);
Overridestatus = (Button) findViewById(R.id.bstatus);
Overridestatus.setOnClickListener(this);
timeperiod = (RadioGroup) findViewById(R.id.rgtimeperiod);
timeperiod.setOnCheckedChangeListener(this);
timePicker = (TimePicker) findViewById(R.id.timePicker);
timePicker.setIs24HourView(true);
}
public void onClick(View view) {
// TODO Auto-generated method stub
switch (view.getId()) {
case R.id.tbOver:
if (override.isChecked()) {
status.setText("Override");
Overridestatus.setText("Personal Mobile");
} else {
status.setText("Currently");
Overridestatus.setText("Use Schedule - Do Not Disturb");
}
break;
case R.id.bstatus:
{
if (override.isChecked()) {
showDialog(0);
}
}
break;
case R.id.rhrandmin:
}
}
@Override
protected Dialog onCreateDialog(int id) {
// TODO Auto-generated method stub
switch (id) {
case 0:
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Select System Server");
builder.setIcon(R.drawable.ic_btn_round_more_normal);
builder.setPositiveButton("OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
// TODO Auto-generated method stub
Intent menu = new Intent(Availability.this,
MenuScreen.class);
startActivity(menu);
}
});
builder.setNegativeButton("CANCEL",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
}
});
builder.setSingleChoiceItems(choice, -1,
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int item) {
// TODO Auto-generated method stub
}
});
builder.create();
builder.show();
break;
case 2:
new TimePickerDialog(this, mTimeSetListener, hour, minute,false);
break;
}
return null;
}
private TimePickerDialog.OnTimeSetListener mTimeSetListener = new TimePickerDialog.OnTimeSetListener() {
public void onTimeSet(TimePicker view, int hourOfDay, int minuteOfHour) {
hour = hourOfDay;
minute = minuteOfHour;
Toast.makeText(getBaseContext(),
"You have selected : " + hour + ":" + minute,
Toast.LENGTH_SHORT).show();
}
};
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
switch (checkedId) {
case R.id.ridefinate:
break;
case R.id.rdays:
break;
case R.id.rhrandmin:
// showDialog(2);
break;
case R.id.rtilldate:
showDialog(1);
break;
}
}
}
日志猫
10-16 19:16:16.567: E/AndroidRuntime(1137): FATAL EXCEPTION: main
10-16 19:16:16.567: E/AndroidRuntime(1137): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.avst.callxpressmobile/com.example.avst.callxpressmobile.Availability}: java.lang.NullPointerException
10-16 19:16:16.567: E/AndroidRuntime(1137): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
10-16 19:16:16.567: E/AndroidRuntime(1137): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
10-16 19:16:16.567: E/AndroidRuntime(1137): at android.app.ActivityThread.access$600(ActivityThread.java:130)
10-16 19:16:16.567: E/AndroidRuntime(1137): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
10-16 19:16:16.567: E/AndroidRuntime(1137): at android.os.Handler.dispatchMessage(Handler.java:99)
10-16 19:16:16.567: E/AndroidRuntime(1137): at android.os.Looper.loop(Looper.java:137)
10-16 19:16:16.567: E/AndroidRuntime(1137): at android.app.ActivityThread.main(ActivityThread.java:4745)
10-16 19:16:16.567: E/AndroidRuntime(1137): at java.lang.reflect.Method.invokeNative(Native Method)
10-16 19:16:16.567: E/AndroidRuntime(1137): at java.lang.reflect.Method.invoke(Method.java:511)
10-16 19:16:16.567: E/AndroidRuntime(1137): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
10-16 19:16:16.567: E/AndroidRuntime(1137): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
10-16 19:16:16.567: E/AndroidRuntime(1137): at dalvik.system.NativeStart.main(Native Method)
10-16 19:16:16.567: E/AndroidRuntime(1137): Caused by: java.lang.NullPointerException
10-16 19:16:16.567: E/AndroidRuntime(1137): at com.example.avst.callxpressmobile.Availability.onCreate(Availability.java:47)
10-16 19:16:16.567: E/AndroidRuntime(1137): at android.app.Activity.performCreate(Activity.java:5008)
10-16 19:16:16.567: E/AndroidRuntime(1137): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
10-16 19:16:16.567: E/AndroidRuntime(1137): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
10-16 19:16:16.567: E/AndroidRuntime(1137): ... 11 more