Skip to main content

Featured post

Simple RecyclerView example with filter option in Android

Hi Guys, Maybe you all are expert in terms of using RecyclerView in android. This blog is simple example for using filter option with RecyclerView adapter. As for now you will instantiate RecyclerView and set the adapter to RecyclerView as following way. RecyclerView list = (RecyclerView) findViewById(R.id.list); list.setLayoutManager(new LinearLayoutManager(this)); list.setHasFixedSize(true); ArrayList&ltNumber&gt numbers = new ArrayList&lt&gt(); String ONEs[] = {"ZERO", "ONE", "TWO", "THREE", "FOUR", "FIVE", "SIX", "SEVEN", "EIGHT", "NINE", "TEN"}; String TENs[] = {"ZERO", "TEN", "TWENTY", "THIRTY", "FOURTY", "FIFTY", "SIXTY", "SEVENTY", "EIGHTY", "NINETY", "HUNDRED"}; String HUNDREDS[] = {"ZERO", "HUNDRED", "TWO HUND
50 comments

Simple example of Using JobScheduler in Android

JobScheduler is the Android framework API for scheduling tasks or work. It first became available in Android 5.0 (API level 21), and remains under active development. Notably, Android 7.0 (API level 24) added the ability to trigger jobs based on ContentProvider changes.

If your app targets Android 5.0 (API level 21), we recommend that you use the JobScheduler to execute background tasks.

Here is the simple example of Scheduling and Cancelling the scheduled job. MainActivity.java
  
public class MainActivity extends AppCompatActivity {

    int count;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);
    }

    public void addJob(View view) {
        count++;
        JobScheduler scheduler = (JobScheduler) getSystemService(Context.JOB_SCHEDULER_SERVICE);
        ComponentName componentName = new ComponentName(this, MyJobService.class);
        JobInfo.Builder builder = new JobInfo.Builder(count, componentName);
        builder.setMinimumLatency(15000);//Start after 15 seconds
        PersistableBundle bundle = new PersistableBundle();
        bundle.putString("Title", "Job " + count);
        builder.setExtras(bundle);
        if (scheduler != null) {
            int result = scheduler.schedule(builder.build());
            if (result == JobScheduler.RESULT_SUCCESS) {
                showToast("Job scheduled successfully");
            } else {
                showToast("Job scheduling failed");
            }
        }
    }

    private void showToast(String s) {
        Toast.makeText(this, s, Toast.LENGTH_LONG).show();
    }

    public void allJobs(View view) {
        startActivity(new Intent(this, AllJobsActivity.class));
    }
}


content_main.xml
  
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior="@string/appbar_scrolling_view_behavior"
    xmlns:tools="http://schemas.android.com/tools"
    tools:showIn="@layout/activity_main">

    <Button
        android:id="@+id/buttonAddJob"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="addJob"
        android:text="Add Job"
        app:layout_constraintBottom_toTopOf="@id/buttonShowAllJob"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

    <Button
        android:id="@+id/buttonShowAllJob"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="allJobs"
        android:text="All Jobs"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/buttonAddJob" />
</android.support.constraint.ConstraintLayout>


MyJobService.java
public class MyJobService extends JobService {
    private static final String TAG = MyJobService.class.getSimpleName();

    @Override
    public boolean onStartJob(JobParameters jobParameters) {
        PersistableBundle bundle = jobParameters.getExtras();
        Log.v(TAG, bundle.getString("Title") + " started");
        jobFinished(jobParameters, false);
        return true;
    }

    @Override
    public boolean onStopJob(JobParameters jobParameters) {
        Log.v(TAG, "Job completed");
        return true;
    }
}
MyJobService should be registered in manifest as below. 
<service
    android:name=".MyJobService"
    android:permission="android.permission.BIND_JOB_SERVICE" />
MyJobService.java
public class AllJobsActivity extends AppCompatActivity {

    private List<JobInfo> pendingJobs = null;
    private JobsAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_all_jobs);
        Toolbar toolbar = findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        RecyclerView recyclerView = findViewById(R.id.myJobList);
        recyclerView.setHasFixedSize(true);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        final JobScheduler scheduler = (JobScheduler) getSystemService(Context.JOB_SCHEDULER_SERVICE);
        if (scheduler != null) {
            pendingJobs = scheduler.getAllPendingJobs();
            adapter = new JobsAdapter(pendingJobs);
            recyclerView.setAdapter(adapter);
        }

        ItemTouchHelper.SimpleCallback callback = new ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT) {
            @Override
            public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
                return false;
            }

            @Override
            public void onSwiped(final RecyclerView.ViewHolder viewHolder, int direction) {
                AlertDialog.Builder builder = new AlertDialog.Builder(AllJobsActivity.this);
                builder.setTitle("Cancel Job");
                builder.setMessage("Are you sure to cancel this Job");
                builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        JobInfo info = pendingJobs.get(viewHolder.getAdapterPosition());
                        scheduler.cancel(info.getId());
                        pendingJobs.remove(viewHolder.getAdapterPosition());
                        dialogInterface.dismiss();
                        adapter.notifyDataSetChanged();
                    }
                });
                builder.setNegativeButton("No", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        dialogInterface.dismiss();
                        adapter.notifyDataSetChanged();
                    }
                });
                builder.create().show();
            }

            @Override
            public void onChildDraw(Canvas c, RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, float dX, float dY, int actionState, boolean isCurrentlyActive) {
                View view = viewHolder.itemView;
                Paint p = new Paint();
                p.setColor(Color.RED);
                RectF rectF;
                if (dX > 0) {
                    rectF = new RectF(view.getLeft(), view.getTop(), dX, view.getBottom());
                } else {
                    rectF = new RectF(view.getRight() + dX, view.getTop(), view.getRight(), view.getBottom());
                }
                c.drawRect(rectF, p);
                super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive);
            }
        };
        ItemTouchHelper helper = new ItemTouchHelper(callback);
        helper.attachToRecyclerView(recyclerView);
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    }

}
JobsAdapter.java
public class JobsAdapter extends RecyclerView.Adapter {
    private List pendingJobs;

    public JobsAdapter(List pendingJobs) {
        this.pendingJobs = pendingJobs;
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.my_list_item, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        holder.bind(position);
    }

    @Override
    public int getItemCount() {
        return pendingJobs.size();
    }

    class ViewHolder extends RecyclerView.ViewHolder {
        private TextView textView;

        ViewHolder(View itemView) {
            super(itemView);
            textView = itemView.findViewById(R.id.text);
        }

        void bind(int position) {
            JobInfo info = pendingJobs.get(position);
            PersistableBundle bundle = info.getExtras();
            textView.setText(bundle.get("Title").toString());
        }
    }
}

Here is the full video tutorial


Interesting right?


If you are really interested in this code, then please share this post with your friends.


Text WhatsApp message to +91-99654 70689 To join Android Developers WhatsApp group.
Join WhatsApp group by this link
Thank You


Comments

Post a Comment

Popular posts from this blog

Simple example of OCRReader in Android.

Hi Friends, Maybe you all heard/used text scanning using camera feature or extracting text from Image. But this sample made it very easy for you. You can made it in very simple line of code. You can download the source code from OCRSample and import the library as a module into your project. Example usage : MainActivity.java public class MainActivity extends AppCompatActivity { private TextView textView; private final int CAMERA_SCAN_TEXT = 0; private final int LOAD_IMAGE_RESULTS = 1; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); textView = findViewById(R.id.textView); } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.menu_main, menu); return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSele
18 comments
Read more

Simple example of using Spinner in Kotlin | Android

Though Kotlin has lot massive features to speedup the development time, here is the simple way of using Spinner in Android. In Kotlin we don't need to declare and initialize Spinner. We can simply access the id of Spinner from xml. Ex : import android.os.Bundle import android.support.v7.app.AppCompatActivity import android.view.View import android.widget.AdapterView import android.widget.ArrayAdapter import android.widget.Toast import android.widget.Toast.LENGTH_LONG import kotlinx.android.synthetic.main.activity_main.* class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) //String array. val myStrings = arrayOf("One", "Two", "Three", "Four", "Five") //Adapter for spinner mySpinner.adapter = ArrayAdapter(this, android.R.layout.simple_spinner_dropdown_i
179 comments
Read more

Set limit for fraction in decimal numbers in EditText

            Already we know that we can set which type of input the edittext should accept from user using android:inputType="numberDecimal" But there is no predefined function to set the limit for the edittext to How many digit it should accept after the decimal point from user . We can achieve this by using TextWatcher . Full code example. Following program creates a Decimal Filter. DecimalFilter.java import android.text.Editable; import android.text.InputFilter; import android.text.TextWatcher; import android.view.KeyEvent; import android.view.View; import android.view.View.OnKeyListener; import android.widget.EditText; public class DecimalFilter implements TextWatcher { int count= -1 ; EditText et; Activity activity; public DecimalFilter(EditText edittext, Activity activity) { et = edittext; this.activity = activity; } public void afterTextChanged(Editable s) { if (s.length() > 0) { String str = et.getText().toString(); et.setOnKeyListener(new OnKeyL
11 comments
Read more