I try to open the preference screen with the option menu. The drawable of the option menu is visible in the right corner but when I click on it the app crashes.
Could anyone tell me why?
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == R.id.item1) {
Intent i = new Intent(this, SettingsActivity.class);
startActivity(i);
Log.d("onOptionsItemSelected","yes");
return true;
}
Log.d("onOptionsItemSelected","no");
return super.onOptionsItemSelected(item);
}
public class SettingsActivity extends AppCompatActivity {
@SuppressLint("ResourceType")
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.xml.preferences);
}
public void showDatePicker(View v) {
DialogFragment newFragment = new DatePickerFragment();
newFragment.show(getFragmentManager(), "date picker");
}
}
public class DatePickerFragment extends DialogFragment {
public Dialog onCreateDialog(Bundle savedInstanceState) {
setHasOptionsMenu(true);
final Calendar c = Calendar.getInstance();
int year = c.get(Calendar.YEAR);
int month = c.get(Calendar.MONTH);
int day = c.get(Calendar.DAY_OF_MONTH);
return new DatePickerDialog(getActivity(), dateSetListener, year, month, day);
}
private DatePickerDialog.OnDateSetListener dateSetListener =
new DatePickerDialog.OnDateSetListener() {
public void onDateSet(DatePicker view, int year, int month, int day) {
Toast.makeText(getActivity(), "selected date is " + view.getYear() +
" / " + (view.getMonth() + 1) +
" / " + view.getDayOfMonth(), Toast.LENGTH_SHORT).show();
}
};
}
```
E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.m.myfirstapp, PID: 4649 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myfirstapp/com.example.m.myfirstapp.SettingsActivity}: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class PreferenceScreen at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726) at android.app.ActivityThread.-wrap12(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6119) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776) Caused by: android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class PreferenceScreen Caused by: android.view.InflateException: Binary XML file line #0: Error inflating class PreferenceScreen Caused by: java.lang.ClassNotFoundException: Didn't find class "android.view.PreferenceScreen" on path: DexPathList[[zip file "/data/app/com.example.myfirstapp-1/base.apk", zip file "/data/app/com.example.m.myfirstapp-1/split_lib_dependencies_apk.apk", zip file "/data/app/com.example.m.myfirstapp-1/split_lib_slice_0_apk.apk", zip file "/data/app/com.example.m.myfirstapp-1/split_lib_slice_1_apk.apk", zip file "/data/app/com.example.m.myfirstapp-1/split_lib_slice_2_apk.apk", zip file "/data/app/com.example.m.myfirstapp-1/split_lib_slice_3_apk.apk", zip file "/data/app/com.example.m.myfirstapp-1/split_lib_slice_4_apk.apk", zip file "/data/app/com.example.m.myfirstapp-1/split_lib_slice_5_apk.apk", zip file "/data/app/com.example.m.myfirstapp-1/split_lib_slice_6_apk.apk", zip file "/data/app/com.example.m.myfirstapp-1/split_lib_slice_7_apk.apk", zip file "/data/app/com.example.m.myfirstapp-1/split_lib_slice_8_apk.apk", zip file "/data/app/com.example.m.myfirstapp-1/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/data/app/com.example.m.myfirstapp-1/lib/x86, /system/lib, /vendor/lib]]
