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從自定義列表視圖中選擇多個項目並傳遞到另一個 列表視圖。當我關閉應用程序時，這些選定的項目變得乾淨。如何從baseadaptor獲取共享首選項值到活動
我已經使用共享的喜好，我能不能夠獲得數據> MainActivity
MainActivity.java
public class MainActivity extends Activity {
private Button bt_inst_app;
GridView gridView, gv_shortcut;
List<AppList> installedApps;
List<AppList> res = new ArrayList<AppList>();
private String appName, appPackageName;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_layout);
gv_shortcut = (GridView) findViewById(R.id.gv_shortcut);
bt_inst_app = (Button) findViewById(R.id.bt_inst_app);
bt_inst_app.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
AlertDialog.Builder quick_links_alert = new AlertDialog.Builder(MainActivity.this);
quick_links_alert.setTitle("Edit Quick Links");
LinearLayout quick_links_layout = new LinearLayout(MainActivity.this);
quick_links_layout.setOrientation(LinearLayout.VERTICAL);
LinearLayout.LayoutParams quick_links_layoutparams = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.FILL_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
quick_links_layoutparams.setMargins(20, 0, 30, 0);
gridView = new GridView(MainActivity.this);
installedApps = getInstalledApps();
final GridViewAdapter gridViewAdapter = new GridViewAdapter(MainActivity.this, installedApps);
gridView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
gridView.setAdapter(gridViewAdapter);
gridView.setNumColumns(5);
quick_links_alert.setView(gridView);
quick_links_alert.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
final List<AppList> mArrayProducts = gridViewAdapter.getCheckedItems();
final QuickLinksGridViewAdaptor selected_apps = new QuickLinksGridViewAdaptor(MainActivity.this, mArrayProducts);
gv_shortcut.setAdapter(selected_apps);
gv_shortcut.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String s = mArrayProducts.get(position).getPackageName();
Intent PackageManagerIntent = getPackageManager().getLaunchIntentForPackage(s);//Here some time getting NULL
startActivity(PackageManagerIntent);
}
});
}
}).setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
}
});
quick_links_alert.show();
}
private List<AppList> getInstalledApps() {
List<PackageInfo> packs = getPackageManager().getInstalledPackages(0);
for (int i = 0; i < packs.size(); i++) {
PackageInfo p = packs.get(i);
//if ((isSystemPackage(p) == false)) {
if (((p.applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) != true) {
appName = p.applicationInfo.loadLabel(getPackageManager()).toString();
Drawable icon = p.applicationInfo.loadIcon(getPackageManager());
appPackageName = p.applicationInfo.packageName;
res.add(new AppList(icon, appName, appPackageName));
}
}
return res;
}
});
}
}
GridViewAdapter.java
public class GridViewAdapter<T> extends BaseAdapter {
Context mContext;
//private final int length = 9;*/
private LayoutInflater layoutInflater;
List<AppList> listStorage;
MainActivity homeactivity;
private int selectedIndex;
private int selectedColor = Color.parseColor("#1b1b1b");
SparseBooleanArray mSparseBooleanArray;
SharedPreferences settings;
public GridViewAdapter(Context context, List<AppList> customizedListView) {
layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.mContext = context;
listStorage = customizedListView;
mSparseBooleanArray = new SparseBooleanArray();
}
public void setSelectedIndex(int ind) {
selectedIndex = ind;
notifyDataSetChanged();
}
public ArrayList<T> getCheckedItems() {
ArrayList<T> mTempArry = new ArrayList<T>();
for (int i = 0; i < listStorage.size(); i++) {
if (mSparseBooleanArray.get(i)) {
mTempArry.add((T) listStorage.get(i));
}
}
return mTempArry;
}
@Override
public int getCount() {
return listStorage.size();
}
public Object getItem(int position) {
return listStorage.get(position);
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
final ViewHolder listViewHolder;
if (convertView == null) {
listViewHolder = new ViewHolder();
LayoutInflater vi = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = vi.inflate(R.layout.add_apps_grid_item, parent, false);
listViewHolder.textInListView = (TextView) convertView.findViewById(R.id.item_name);
listViewHolder.imageInListView = (ImageView) convertView.findViewById(R.id.item_type);
listViewHolder.tvPkgName = (TextView) convertView.findViewById(R.id.tvPack);
listViewHolder.select_app = (CheckBox) convertView.findViewById(R.id.select_app);
convertView.setTag(listViewHolder);
} else {
listViewHolder = (ViewHolder) convertView.getTag();
}
listViewHolder.textInListView.setText(listStorage.get(position).getName());
listViewHolder.imageInListView.setImageDrawable(listStorage.get(position).getIcon());
listViewHolder.tvPkgName.setText(listStorage.get(position).getPackageName());
listViewHolder.select_app.setTag(position);
listViewHolder.select_app.setChecked(mSparseBooleanArray.get(position));
final AppList item = listStorage.get(position);
listViewHolder.textInListView.setText(item.getName());
SharedPreferences settings = mContext.getSharedPreferences("data", Context.MODE_PRIVATE);
boolean Checked = settings.getBoolean(item.getName(), false);
listViewHolder.select_app.setChecked(Checked);
listViewHolder.select_app.setOnCheckedChangeListener(new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
Toast.makeText(mContext, "pkg name==" + listStorage.get(position).getPackageName(), Toast.LENGTH_LONG).show();
if (listViewHolder.select_app.isChecked() == true) {
SharedPreferences settings = mContext.getSharedPreferences("data", Context.MODE_PRIVATE);
// Toast.makeText(mContext, "You deselected " + Context.MODE_PRIVATE, Toast.LENGTH_SHORT).show();
mSparseBooleanArray.put((Integer) buttonView.getTag(), settings.edit().putBoolean(item.getName(), true).commit());
// Toast.makeText(mContext, "You selected " + item.getName(), Toast.LENGTH_SHORT).show();
} else {
SharedPreferences settings = mContext.getSharedPreferences("data", Context.MODE_PRIVATE);
mSparseBooleanArray.put((Integer) buttonView.getTag(), settings.edit().putBoolean(item.getName(), false).commit());
// Toast.makeText(mContext, "You deselected " + item.getName(), Toast.LENGTH_SHORT).show();
}
// Toast.makeText(mContext, "Shared prefernce---->" + mContext.toString(), Toast.LENGTH_SHORT).show();
}
});
return convertView;
}
OnCheckedChangeListener mCheckedChangeListener = new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
mSparseBooleanArray.put((Integer) buttonView.getTag(), isChecked);
}
};
static class ViewHolder {
TextView textInListView, tvPkgName;
ImageView imageInListView;
CheckBox select_app;
}
}
AppList.java
public class AppList implements Parcelable {
private String name;
private String packageName;
Drawable icon;
private boolean selected;
public AppList(Drawable icon, String name, String packageName) {
this.name = name;
this.icon = icon;
this.packageName = packageName;
}
protected AppList(Parcel in) {
name = in.readString();
packageName = in.readString();
selected = in.readByte() != 0;
}
public static final Creator<AppList> CREATOR = new Creator<AppList>() {
@Override
public AppList createFromParcel(Parcel in) {
return new AppList(in);
}
@Override
public AppList[] newArray(int size) {
return new AppList[size];
}
};
public String getName() {
return name;
}
public String getPackageName() {
return packageName;
}
public Drawable getIcon() {
return icon;
}
public String toString() {
return name;
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel parcel, int i) {
parcel.writeString(name);
parcel.writeString(packageName);
parcel.writeByte((byte) (selected ? 1 : 0));
}
public boolean isSelected() {
return selected;
}
public void setSelected(boolean selected) {
this.selected = selected;
}
}
QuickLinksGridViewAdaptor.java
public class QuickLinksGridViewAdaptor<T> extends BaseAdapter {
private Context context;
//private final int length = 9;*/
private LayoutInflater layoutInflater;
List<AppList> listStorage;
MainActivity homeactivity;
private int selectedIndex;
SparseBooleanArray mSparseBooleanArray;
int num = 1;
public QuickLinksGridViewAdaptor(Context context, List<AppList> customizedListView) {
layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
listStorage = customizedListView;
mSparseBooleanArray = new SparseBooleanArray();
}
public void setSelectedIndex(int ind) {
selectedIndex = ind;
notifyDataSetChanged();
}
public ArrayList<T> getCheckedItems() {
ArrayList<T> mTempArry = new ArrayList<T>();
for (int i = 0; i < listStorage.size(); i++) {
if (mSparseBooleanArray.get(i)) {
mTempArry.add((T) listStorage.get(i));
}
}
return mTempArry;
}
@Override
public int getCount() {
//return 8;
if(num*8 >= listStorage.size()){
return listStorage.size();
}else{
return num*8;
}
}
public Object getItem(int position) {
return listStorage.get(position);
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder listViewHolder;
if (convertView == null) {
listViewHolder = new ViewHolder();
convertView = layoutInflater.inflate(R.layout.add_apps_grid_item1, parent, false);
listViewHolder.textInListView = (TextView) convertView.findViewById(R.id.item_name1);
listViewHolder.imageInListView = (ImageView) convertView.findViewById(R.id.item_type1);
convertView.setTag(listViewHolder);
} else {
listViewHolder = (ViewHolder) convertView.getTag();
}
listViewHolder.textInListView.setText(listStorage.get(position).getName());
listViewHolder.imageInListView.setImageDrawable(listStorage.get(position).getIcon());
return convertView;
}
static class ViewHolder {
TextView textInListView;
ImageView imageInListView;
}
}
您在哪裏將數據保存在sharedPreference中。我經歷了你的代碼，但發現你只能訪問來自sharedPref的數據而沒有存儲。 –
在Gridview適配器「mContext.getSharedPreferences（」data「 – Narendra
我可以知道如何讓共享首選項數據庫適配器活動 – Narendra