Java 活动响应方法中首选项管理器上的Google Play控制台崩溃报告
Google Play控制台崩溃报告错误:Java 活动响应方法中首选项管理器上的Google Play控制台崩溃报告,java,android,sharedpreferences,Java,Android,Sharedpreferences,Google Play控制台崩溃报告错误: java.lang.NullPointerException: at in.abc.abc.abc.abc.Event_List$2.onResponse (Event_List.java:119) at retrofit2.ExecutorCallAdapterFactory$ExecutorCallbackCall$1$1.run (ExecutorCallAdapterFactory.java:70) at an
java.lang.NullPointerException:
at in.abc.abc.abc.abc.Event_List$2.onResponse (Event_List.java:119)
at retrofit2.ExecutorCallAdapterFactory$ExecutorCallbackCall$1$1.run (ExecutorCallAdapterFactory.java:70)
at android.os.Handler.handleCallback (Handler.java:794)
at android.os.Handler.dispatchMessage (Handler.java:99)
at android.os.Looper.loop (Looper.java:176)
at android.app.ActivityThread.main (ActivityThread.java:6635)
at java.lang.reflect.Method.invoke (Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run (RuntimeInit.java:547)
at com.android.internal.os.ZygoteInit.main (ZygoteInit.java:823)
活动:
PrefManager prefManager;
@Override
protected void onCreate(Bundle savedInstanceState)
{
prefManager = new PrefManager(Event_List.this);
getAllEvents();
}
private void getAllEvents()
{
getAllEvents.enqueue(new Callback<Events>() {
@Override
public void onResponse(Call<Events> call, Response<Events> response)
{
if(!response.isSuccessful())
{
if (response.code() == 400 || response.code() == 401 )
{
prefManager.clear();
}
Toast.makeText(Event_List.this, "Please try again", Toast.LENGTH_SHORT).show();
return;
}
}
});
}
}
在运行时,我在google play控制台中为pref manager获取此错误。
任何人都可以建议在project中使用preference manager的正确方法吗?创建类:
public class MySharedPref {
public static SharedPreferences sharedPreferences;
Context context;
SharedPreferences.Editor editor;
public String getCountry() {
return sharedPreferences.getString("COUNTRY","");
}
public void setCountry(String country) {
this.country = country;
insert("COUNTRY",country);
}
// Instantiate constructor
public MySharedPref(Context context)
{
this.context = context;
sharedPreferences = context.getSharedPreferences("MY_PREF", Context.MODE_PRIVATE);
editor = sharedPreferences.edit();
}
public void insert(String key, String value) {
editor.putString(key, value);
editor.apply();
}
public void clear()
{
editor.clear();
editor.commit();
}
}
main活动
:
MySharedPref sharedPref;
String country = "";
private static final String[] COUNTRIES = new String[] {
"Belgium", "France", "Italy", "Germany", "Spain"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sharedPref = new MySharedPref(MainActivity.this);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_dropdown_item_1line, COUNTRIES);
AutoCompleteTextView textView = (AutoCompleteTextView)
findViewById(R.id.countries_list);
textView.setAdapter(adapter);
materialButton = findViewById(R.id.materialButton);
if (sharedPref.getCountry()!=null) {
textView.setText(sharedPref.getCountry());
}
textView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
String selection = (String) adapterView.getItemAtPosition(i);
sharedPref.setCountry(selection);
}
});
materialButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
sharedPref.clear();
});
MySharedPref-sharedPref;
字符串country=“”;
私有静态最终字符串[]国家/地区=新字符串[]{
“比利时”、“法国”、“意大利”、“德国”、“西班牙”};
@凌驾
创建时受保护的void(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sharedPref=newmySharedPref(MainActivity.this);
ArrayAdapter=新的ArrayAdapter(此,
android.R.layout.simple_下拉列表_项目_1行,国家/地区);
AutoCompleteTextView文本视图=(AutoCompleteTextView)
findViewById(R.id.国家/地区列表);
setAdapter(适配器);
materialButton=findViewById(R.id.materialButton);
如果(sharedPref.getCountry()!=null){
textView.setText(sharedPref.getCountry());
}
textView.setOnItemClickListener(新的AdapterView.OnItemClickListener(){
@凌驾
公共无效onItemClick(AdapterView AdapterView、View视图、int i、long l){
字符串选择=(字符串)adapterView.getItemAtPosition(i);
sharedPref.setCountry(选择);
}
});
materialButton.setOnClickListener(新视图.OnClickListener(){
@凌驾
公共void onClick(视图){
sharedPref.clear();
});
但是已经在构造函数中完成了,我们正在使用编辑器。commit()可以吗。实际上它必须正常工作。让我编辑我的代码。检查您是否已经完成了所有操作。如果您发现答案有用,请接受并投票,这样它将帮助其他同事。
MySharedPref sharedPref;
String country = "";
private static final String[] COUNTRIES = new String[] {
"Belgium", "France", "Italy", "Germany", "Spain"};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sharedPref = new MySharedPref(MainActivity.this);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_dropdown_item_1line, COUNTRIES);
AutoCompleteTextView textView = (AutoCompleteTextView)
findViewById(R.id.countries_list);
textView.setAdapter(adapter);
materialButton = findViewById(R.id.materialButton);
if (sharedPref.getCountry()!=null) {
textView.setText(sharedPref.getCountry());
}
textView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
String selection = (String) adapterView.getItemAtPosition(i);
sharedPref.setCountry(selection);
}
});
materialButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
sharedPref.clear();
});