我尝试在点击选项后重新创建相同的listview活动，只是它不起作用。我尝试了SubjectSelectorActivity.this.recreate();和startActivity(new Intent(SubjectSelectorActivity.this, SubjectSelectorActivity.class));，但这并没有重置onclick结果。我可以使用哪一行代码重新创建和重置我的Activity / Adapter中的onclick结果？我还想重新创建它，以便我可以将屏幕动画向左滑动并显示新的重新创建的活动，因此如果可以将其用于代码，那将是非常棒的。此外，如果您发现我的代码有任何问题或者有更简单的方法（可能是因为我是初学者），请告诉我：）
代码：
package com.example.adend.timetable.activities;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.support.v7.app.ActionBar;
import android.support.v7.widget.Toolbar;
import android.os.Bundle;
import android.view.LayoutInflater;
import com.example.adend.timetable.R;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import com.example.adend.timetable.appwidgets.AbsThemeActivity;
import com.kabouzeid.appthemehelper.ThemeStore;
public class SubjectSelectorActivity extends AbsThemeActivity implements View.OnClickListener {
ListView lv;
Context context;
SubjectAdapter adapter;
public static int[] subjectIcons ={
R.drawable.cross,
R.drawable.tags,
R.drawable.film,
R.drawable.book,
R.drawable.food,
R.drawable.earth,
R.drawable.heart_pulse,
R.drawable.run,
R.drawable.history,
R.drawable.indo,
R.drawable.jap,
R.drawable.law,
R.drawable.calculator,
R.drawable.film,
R.drawable.library_music,
R.drawable.earth,
R.drawable.bike,
R.drawable.hammer,
R.drawable.run,
R.drawable.phsy,
R.drawable.currency_usd,
R.drawable.microscope,
R.drawable.drawing_box,
R.drawable.settings,
R.drawable.tshirt_crew,
R.drawable.drawing_box,
R.drawable.settings,
};
public static String[] subjects = {
"Christian ED",
"Coding and Informatics",
"Drama",
"English",
"Food Studies",
"Geography",
"Health",
"Health/PE",
"History",
"Indonesian",
"Japanese",
"Law and Economics",
"Mathematics",
"Media Arts",
"Music",
"Our World",
"Outdoor Education",
"PDT – Materials",
"Phys ED",
"Psychology",
"Running a Small Business",
"Science",
"Studio Arts",
"Systems Engineering",
"Textiles",
"Visual Communication Design",
"Custom",
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_subject_selector);
Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
ActionBar ab = getSupportActionBar();
ab.setDisplayHomeAsUpEnabled(true);
Button next = (findViewById(R.id.next));
Button cancel = (findViewById(R.id.cancel));
toolbar.setBackgroundColor(ThemeStore.primaryColor(this));
setStatusbarColor(ThemeStore.primaryColor(this));
next.setTextColor(ThemeStore.primaryColor(this));
next.setOnClickListener(this);
context = this;
lv = findViewById(R.id.list);
adapter = new SubjectAdapter(this, subjects, subjectIcons);
lv.setAdapter(adapter);
}
public int getCounter() {
SharedPreferences getnotch = context.getSharedPreferences("counter", MODE_PRIVATE);
int defaultValue = 0;
int notch = getnotch.getInt("counter", defaultValue);
return notch;
}
private String getPass() {
SharedPreferences pass = context.getSharedPreferences("pass", MODE_PRIVATE);
String defaultValue = null;
String passi = pass.getString("pass", defaultValue);
return passi;
}
@Override
public void onClick(View v) {
String subposition = getPass();
if (getPass() != null) {
SharedPreferences counter = getSharedPreferences("counter", MODE_PRIVATE);
SharedPreferences.Editor countereditor = counter.edit();
if (getCounter() == 0) {
SharedPreferences sharedMonP1 = getSharedPreferences("MonP1", MODE_PRIVATE);
SharedPreferences.Editor monp1editor = sharedMonP1.edit();
monp1editor.putString("MonP1", subposition);
monp1editor.commit();
countereditor.putInt("counter", getCounter() + 1);
countereditor.commit();
startActivity(new Intent(SubjectSelectorActivity.this, SubjectSelectorActivity.class));
// restart activity for a new onclick result - tried "startActivity(new Intent(SubjectSelectorActivity.this, SubjectSelectorActivity.class));"
// but it keeps the same onclick result and sets all of the SharedPreferences as the same string.
// As it restarts, animation slide to left
}
if (getCounter() == 1) {
SharedPreferences sharedMonP2 = getSharedPreferences("MonP2", MODE_PRIVATE);
SharedPreferences.Editor monp2editor = sharedMonP2.edit();
monp2editor.putString("MonP2", subposition);
monp2editor.commit();
countereditor.putInt("counter", getCounter() + 1);
countereditor.commit();
startActivity(new Intent(SubjectSelectorActivity.this, SubjectSelectorActivity.class));
// restart activity for a new onclick result - tried "startActivity(new Intent(SubjectSelectorActivity.this, SubjectSelectorActivity.class));"
// but it keeps the same onclick result and sets all of the SharedPreferences as the same string.
// As it restarts, animation slide to left
}
if (getCounter() == 2) {
SharedPreferences sharedMonP3 = getSharedPreferences("MonP3", MODE_PRIVATE);
SharedPreferences.Editor monp3editor = sharedMonP3.edit();
monp3editor.putString("MonP3", subposition);
monp3editor.commit();
countereditor.putInt("counter", getCounter() + 1);
countereditor.commit();
startActivity(new Intent(SubjectSelectorActivity.this, SubjectSelectorActivity.class));
// restart activity for a new onclick result - tried "startActivity(new Intent(SubjectSelectorActivity.this, SubjectSelectorActivity.class));"
// but it keeps the same onclick result and sets all of the SharedPreferences as the same string.
// As it restarts, animation slide to left
}
if (getCounter() == 3) {
startActivity(new Intent(SubjectSelectorActivity.this, MainActivity.class));
}
}
}
public class SubjectAdapter extends BaseAdapter {
String[] result;
int[] imageId;
Context context;
private LayoutInflater inflater = null;
public SubjectAdapter(SubjectSelectorActivity subjectSelector, String[] subjects, int[] subjectIcons) {
result = subjects;
context = subjectSelector;
imageId = subjectIcons;
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return result.length;
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return position;
}
public class Holder {
TextView tv1;
ImageView img;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (getCounter() == 3){
SharedPreferences counter = getSharedPreferences("counter", MODE_PRIVATE);
SharedPreferences.Editor countereditor = counter.edit();
countereditor.putInt("counter", 0);
countereditor.commit();
}
Holder holder = new Holder();
View rowView;
rowView = inflater.inflate(R.layout.subject, null);
holder.tv1 = rowView.findViewById(R.id.subtext);
holder.img = rowView.findViewById(R.id.subimg);
holder.tv1.setText(result[position]);
holder.img.setImageResource(imageId[position]);
rowView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String sub = result[position];
SharedPreferences passs = getSharedPreferences("pass", MODE_PRIVATE);
SharedPreferences.Editor passe = passs.edit();
passe.putString("pass", sub);
passe.commit();
}
});
return rowView;
}
}
}
答案 0 :(得分：0)
您可以使用
groovy.transform.stc每当更改提供给适配器的数据并且您想要重置listView以再次创建视图时。
如果要重新绘制listView中的所有项目，请使用
adapter.notifyDataSetChanged();