When I am starting Stack activity a blank page is being displayed, so could you please help me out.
public class Stack extends Activity {
LinearLayout linear;
ScrollView scroll;
@override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
scroll = new ScrollView(this);
linear = new LinearLayout(this);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
linear.setLayoutParams(lp);
linear.setOrientation(LinearLayout.HORIZONTAL);
scroll.setLayoutParams(lp);
linear.addView(new AnimateNode(this));
scroll.addView(linear);
setContentView(scroll);
}
public class AnimateNode extends View {
public AnimateNode(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
@override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
Paint paint = new Paint();
paint.setStyle(Style.STROKE);
paint.setPathEffect(new DashPathEffect(new float[] { 10, 20 }, 0));
canvas.drawLine(0, 10, 200, 10, paint);
}
}
}
Related
Hi, I am developping a home screen app, and I want only certain apps to be able tu be launched from my home screen.
I want to do it exactly like Surelock:
When the user tries to open an app that doesn't belong to my list of accepted apps, he should receive a toast saying something like example: "com.android.settings blocked by this app".
I need that type of security, I came across a piece of code on the web, but it does not work...
Could you help me out either by suggesting something new or by helping me understand and fix this one?
public class MonitorService extends Service {
private Handler handler;
Runnable runnable;
@override
public void onCreate() {
// TODO Auto-generated method stub
super.onCreate();
handler = new Handler();
runnable = new Runnable() {
@override
public void run() {
new Thread(new Runnable() {
@override
public void run() {
ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
List<ActivityManager.RunningTaskInfo> taskInfo = am
.getRunningTasks(1);
ComponentName componentInfo = taskInfo.get(0).topActivity;
String currentActivityName=componentInfo.getClassName();
String packageName=componentInfo.getPackageName();
if(whitelist.contains(currentActivityName)){
Intent launchIntent = new Intent();
launchIntent.setComponent(new ComponentName(blockActivityPackageName,
blockActivityName));
launchIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(launchIntent);
}
}
}).start();
handler.postDelayed(this, 1000);
}
};
handler.postDelayed(runnable, 1000);
}
@override
public void onStart(Intent intent, int startId) {
super.onStart(intent, startId);
}
@override
public IBinder onBind(Intent intent) {
return null;
}
@override
public void onDestroy() {
super.onDestroy();
Intent intent = new Intent(this, MonitorService.class);
startService(intent);
}
@override
public int onStartCommand(Intent intent, int flags, int startId) {
return START_STICKY;
}}
When I am starting Stack activity a blank page is being displayed, so could you please help me out.
public class Stack extends Activity {
LinearLayout linear;
ScrollView scroll;
@override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
scroll = new ScrollView(this);
linear = new LinearLayout(this);
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(
LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
linear.setLayoutParams(lp);
linear.setOrientation(LinearLayout.HORIZONTAL);
scroll.setLayoutParams(lp);
linear.addView(new AnimateNode(this));
scroll.addView(linear);
setContentView(scroll);
}
public class AnimateNode extends View {
public AnimateNode(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
@override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
Paint paint = new Paint();
paint.setStyle(Style.STROKE);
paint.setPathEffect(new DashPathEffect(new float[] { 10, 20 }, 0));
canvas.drawLine(0, 10, 200, 10, paint);
}
}
}
Hello,
Please post your question here:
http://forum.xda-developers.com/general/help
The members there will be able to help you, good luck.
Code:
public class ThreeFragment extends Fragment {
public View ThreeFragmentView = null;
public static TextView internalMemoryInfo;
public static Button IntBtn;
public ThreeFragment() {
// Required empty public constructor
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
if (ThreeFragmentView == null) ThreeFragmentView = inflater.inflate(R.layout.fragment_three, container, false);
internalMemoryInfo = (TextView) ThreeFragmentView.findViewById(R.id.textViewInternalMemoryInfo);
IntBtn = (Button) ThreeFragmentView.findViewById(R.id.InternalBtn);
return ThreeFragmentView;
}
public static void showText(String text) {
internalMemoryInfo.setText(text);
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
registerForContextMenu(IntBtn);
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
switch (v.getId()){
case R.id.InternalBtn:
menu.setHeaderTitle("Internal Memory Menu");
menu.add(0, ClearCacheMet, 0, "Clear Cache");
menu.add(0, Common, 0, "Go to Common Tab");
menu.add(0, ITEM_CANCEL, 0, "Cancel");
break;
}
}
@Override
public boolean onContextItemSelected(MenuItem item) {
switch (item.getItemId()) {
case ClearCacheMet:
ClearCache(); <-------This not working
break;
case Common:
tabLayout.getTabAt(0).select(); <-------This working
break;
case ITEM_CANCEL:
ins.closeContextMenu(); <-------This working
break;
}
return true;
}
public static boolean deleteDir(File dir){
if (dir != null && dir.isDirectory()) {
String[] children = dir.list();
for (int i = 0; i < children.length; i++) {
boolean success = deleteDir(new File(dir, children[i]));
if (!success) {
return false;
}
}
}
return dir.delete();
}
public static void ClearCache() {
File cache = ins.getCacheDir();
File appDir = new File(cache.getParent());
if (appDir.exists()) {
String[] children = appDir.list();
for (String s : children) {
if (!s.equals("lib")) {
deleteDir(new File(appDir, s));
}
}
}
try{
/*if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
((ActivityManager) ins.getSystemService(Context.ACTIVITY_SERVICE)).clearApplicationUserData();
} else {*/
File externalcache = ins.getExternalCacheDir();
File externalappDir = new File(externalcache.getParent());
if (externalappDir.exists()) {
String[] children = externalappDir.list();
for (String s : children) {
if (!s.equals("lib")) {
deleteDir(new File(externalappDir, s));
}
}
} else {
Log.d(TAG, "No externalappDir");
}
/*}*/
} catch (Exception e) {
Log.d(TAG, "MainActivity in ClearCache");
}
}
I have fragment(ThreeFragment) with button(InternalBtn) that have a context menu. Context menu registered with registerForContextMenu(IntBtn); Menu item ClearCacheMet not working. I cannot see neither Toast.makeText().show(); nor Log.d(TAG, "ClearCache"); Common and ITEM_CANCEL items working. I cannot understand why? Please help me.
Toast.makeText(getActivity(), "Called !", Toast.LENGTH_SHORT).show(); not called in ClearCache() function. ClearCacheMet and Common were initialized in other fragment.
public class OneFragment extends Fragment {
public View OneFragmentView = null;
public static final int Common = 25;
public static final int ClearCacheMet = 50;
My MainActivity has a RecyclerView adapter, and data to this RecyclerView is added through a AlertDialog which passes the entered text to the MainActivity. The recycler view gets refreshed somehow when the positive button in the dialog is pressed even though I never call notifyItemInserted() or notifyDatasetChange() after passing the new input. I want to know how this happens, my guess is the recyclerview is somehow refreshed after the positive button is pressed in the dialog box.
Custom AlertDialog Code:
Code:
public class CustomDialog extends AppCompatDialogFragment {
OnNoteAddedListener onNoteAddedListener;
public interface OnNoteAddedListener {
public void onClick(String note);
}
public CustomDialog(OnNoteAddedListener onNoteAddedListener) {
this.onNoteAddedListener = onNoteAddedListener;
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
// Get the layout inflater
final LayoutInflater inflater = getActivity().getLayoutInflater();
final View dialogLayout = inflater.inflate(R.layout.dialog_box, null);
// Inflate and set the layout for the dialog
// Pass null as the parent view because its going in the dialog layout
builder.setView(dialogLayout).setPositiveButton("Ok", new DialogInterface.OnClickListener() {@Override
public void onClick(DialogInterface dialog, int id) {
EditText addNote = dialogLayout.findViewById(R.id.note_text);
String note = addNote.getText().toString();
onNoteAddedListener.onClick(note);
}
}).setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
CustomDialog.this.getDialog().cancel();
}
});
return builder.create();
}
}
Adapter code:
Code:
class RecyclerViewAdapter extends RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder>
{
private static final String TAG = "RecyclerViewAdapter";
private List<String> notesList;
private Context mContext;
private SendPositionConnector sendPositionConnector;
public interface SendPositionConnector
{
public void sendPosition(int position);
}
public RecyclerViewAdapter(List<String> notesList, Context mContext)
{
this.notesList = notesList;
this.mContext = mContext;
this.sendPositionConnector = (MainActivity)mContext;
}
@NonNull
@Override
public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType)
{
View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_listitem, parent, false);
ViewHolder holder = new ViewHolder(view);
return holder;
}
@Override
public void onBindViewHolder(@NonNull ViewHolder viewHolder, final int position)
{
Log.d(TAG, "onBindViewHandler: called");
viewHolder.noteContent.setText(notesList.get(position));
viewHolder.parentLayout.setOnLongClickListener(new View.OnLongClickListener(){
@Override
public boolean onLongClick(View view)
{
Log.d(TAG, "onLongClick: long clicked on");
sendPositionConnector.sendPosition(position);
return false;
}
});
}
@Override
public int getItemCount()
{
return notesList.size();
}
public class ViewHolder extends RecyclerView.ViewHolder
{
TextView noteContent;
RelativeLayout parentLayout;
ImageView bullet;
public ViewHolder(@NonNull View itemView)
{
super(itemView);
bullet = itemView.findViewById(R.id.bullet);
noteContent = itemView.findViewById(R.id.text_content);
parentLayout = itemView.findViewById(R.id.parent_layout);
}
}
}
Main Activity:
Code:
public class MainActivity extends AppCompatActivity implements RecyclerViewAdapter.SendPositionConnector
{
private static final String TAG = "MainActivity";
private List<String> notesList = new ArrayList<>();
private RecyclerView recyclerView;
private RecyclerViewAdapter adapter;
private int position;
public AgentAsyncTask agentAsyncTask;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
recyclerView = findViewById(R.id.my_recycler_view);
registerForContextMenu(recyclerView);
recyclerView.setLayoutManager(new LinearLayoutManager(this));
agentAsyncTask = new AgentAsyncTask(notesList, getApplicationContext(), true, new AgentAsyncTask.OnRead(){
@Override
public void onRead(List<String> notesList)
{
if(!notesList.isEmpty())
MainActivity.this.notesList = notesList;
adapter = new RecyclerViewAdapter(notesList, MainActivity.this);
recyclerView.setAdapter(adapter);
}
});
agentAsyncTask.execute();
}
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.add_menu, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
// Handle item selection
switch (item.getItemId())
{
case R.id.add_note:
showDialogBox(item);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
@Override
protected void onStop()
{
super.onStop();
new AgentAsyncTask(notesList, getApplicationContext(), false, new AgentAsyncTask.OnRead(){
@Override
public void onRead(List<String> notesList)
{
if(!notesList.isEmpty())
MainActivity.this.notesList = notesList;
}
}).execute();
}
@Override
protected void onDestroy()
{
super.onDestroy();
}
private boolean showDialogBox(MenuItem menuItem)
{
AppCompatDialogFragment dialogFragment = new CustomDialog(new CustomDialog.OnNoteAddedListener(){
@Override
public void onClick(String note)
{
Log.d(TAG, "onClick: "+ note);
notesList.add(note);
}
});
dialogFragment.show(getSupportFragmentManager(),"Adding");
return true;
}
@Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo)
{
super.onCreateContextMenu(menu, v, menuInfo);
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.context_menu, menu);
}
@Override
public boolean onContextItemSelected(MenuItem menuItem)
{
switch(menuItem.getItemId())
{
case R.id.delete:
notesList.remove(position);
adapter.notifyItemRemoved(position);
adapter.notifyItemRangeChanged(position, notesList.size());
return true;
default:
return false;
}
}
@Override
public void sendPosition(int position)
{
this.position = position;
}
private static class AgentAsyncTask extends AsyncTask<Void, Void, List<String>>
{
private List<String> notesList;
private boolean flag;
OnRead onRead;
Context context;
AppDataBase dataBase;
private static final String TAG = "AgentAsyncTask";
public interface OnRead
{
public void onRead(List<String> notesList);
}
private AgentAsyncTask(List<String> notesList,Context context,boolean flag, OnRead onRead)
{
this.notesList = notesList;
this.onRead = onRead;
this.flag = flag;
this.context = context;
}
@Override
protected List<String> doInBackground(Void... params)
{
dataBase = Room.databaseBuilder(context, AppDataBase.class, "database-name").build();
if(!flag)
{
Gson gson = new Gson();
Type type = new TypeToken<List<String>>() {}.getType();
String json = gson.toJson(notesList, type);
Log.d(TAG, "doInBackground: "+json);
Notes notes = new Notes();
notes.setNoteContent(json);
notes.setUid(1);
dataBase.notesDao().insertNotes(notes);
return notesList;
}
else
{
Gson gson = new Gson();
String notesListContent = dataBase.notesDao().getNotes();
if(dataBase.notesDao().getCount() != 0)
{
notesList = gson.fromJson(notesListContent, new TypeToken<List<String>>()
{
}.getType());
}
else
{
return notesList;
}
return notesList;
}
}
@Override
protected void onPostExecute(List<String> notesList)
{
super.onPostExecute(notesList);
if(flag)
onRead.onRead(notesList);
}
}
}
Adapter code:
public class ItemAdapter extends RecyclerView.Adapter<ItemAdapter.MyViewHolder> {
private Context mContext;
private List<Item> itemList;
public class MyViewHolder extends RecyclerView.ViewHolder {
public TextView title, count;
public ImageView thumbnail, overflow;
public MyViewHolder(View view) {
super(view);
title = (TextView) view.findViewById(R.id.title);
count = (TextView) view.findViewById(R.id.count);
thumbnail = (ImageView) view.findViewById(R.id.thumbnail);
overflow = (ImageView) view.findViewById(R.id.overflow);
}
}
public ItemAdapter(Context mContext, List<Item> itemList) {
this.mContext = mContext;
this.itemList = itemList;
}
@override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View itemView = LayoutInflater.from(parent.getContext())
.inflate(R.layout.row_list_item, parent, false);
return new MyViewHolder(itemView);
}
@override
public void onBindViewHolder(final MyViewHolder holder, int position) {
Item item = itemList.get(position);
holder.title.setText(item.getName());
holder.count.setText("address: " + item.getAddress());
// loading album cover using Glide library
Glide.with(mContext).load(item.getThumbnail()).into(holder.thumbnail);
holder.overflow.setOnClickListener(new View.OnClickListener() {
@override
public void onClick(View view) {
showPopupMenu(holder.overflow);
}
});
}
/**
* Showing popup menu when tapping on 3 dots
*/
private void showPopupMenu(View view) {
// inflate menu
PopupMenu popup = new PopupMenu(mContext, view);
MenuInflater inflater = popup.getMenuInflater();
inflater.inflate(R.menu.menu_item, popup.getMenu());
popup.setOnMenuItemClickListener(new MyMenuItemClickListener());
popup.show();
}
/**
* Click listener for popup menu items
*/
class MyMenuItemClickListener implements PopupMenu.OnMenuItemClickListener {
public MyMenuItemClickListener() {
}
@override
public boolean onMenuItemClick(MenuItem menuItem) {
switch (menuItem.getItemId()) {
case R.id.action_like:
Toast.makeText(mContext, "Like", Toast.LENGTH_SHORT).show();
return true;
case R.id.action_unlike:
Toast.makeText(mContext, "Unlike", Toast.LENGTH_SHORT).show();
return true;
default:
}
return false;
}
}
@override
public int getItemCount() {
return itemList.size();
}
}