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在我的应用程序中,我有一个设置Activity来选择应该仅在应用程序中第一次运行的语言,但它有时会在切换片段时显示。我如何让它只显示第一次运行?应用程序运行时首次运行活动正在显示
代码:MainActivity
if (isFirstTime()) {
Intent myIntent;
myIntent = new Intent(this, Settings.class);
startActivity(myIntent);
}else{
... start the normal mainactivity
}
的firstTime温控功能:
private boolean isFirstTime() {
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
boolean ranBefore = preferences.getBoolean("RanBefore1", false);
return !ranBefore;
}
设置活动:
private Spinner spinner;
private Button button;
private String lang="";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.settings_layout);
findViewByID();
setListeners();
}
private void findViewByID() {
spinner = (Spinner) findViewById(R.id.spinner);
button = (Button) findViewById(R.id.button2);
ArrayAdapter adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_spinner_item, getResources().getStringArray(R.array.langs));
spinner.setAdapter(adapter);
}
private void setListeners() {
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
switch (position) {
case 0:
lang= "en";
break;
case 1:
lang="fr";
break;
case 2:
lang="ar";
break;
} }
@Override
public void onNothingSelected(AdapterView<?> parentView) {
// your code here
}
});
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getBaseContext());
SharedPreferences.Editor editor = preferences.edit();
editor.putBoolean("RanBefore1", true);
editor.apply();
if(getLanguage()!=null&&!getLanguage().contains(lang)) {
setLanguage(lang);
Intent mainIntent = new Intent(getApplicationContext(), MainActivity.class);
startActivity(mainIntent);
}else {
Intent mainIntent = new Intent(getApplicationContext(), MainActivity.class);
startActivity(mainIntent);
}
}
});
}
当你完成后,你应该完成活动。即在启动新版本之后 –
@TimCastelijns所以应该只添加finish();在启动startActivity(mainIntent)之后的设置活动中;? – busted13