Basic Android : May 2016

Sunday, May 15, 2016

Change DNS in Ubuntu

Change DNS in Ubuntu to go to facebook or do something

Change DNS in Android

Saturday, May 7, 2016

Split audio from video Youtube with Dirpy

Wednesday, May 4, 2016

RecyclerView Loadmore

activity_layout

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

 android:layout_width="match_parent"

 android:layout_height="match_parent"

 android:fitsSystemWindows="true"

 android:orientation="vertical">

    <android.support.v7.widget.RecyclerView

 android:id="@+id/my_recycler_view"

 android:layout_width="match_parent"

 android:layout_height="0dp"

 android:layout_margin="5dp"

 android:layout_weight="1"

 android:scrollbars="vertical" />


    <TextView

 android:id="@+id/empty_view"

 android:layout_width="match_parent"

 android:layout_height="match_parent"

 android:gravity="center"

 android:text="No Records"

 android:visibility="gone" />


</LinearLayout>

list_row

<?xml version="1.0" encoding="utf-8"?>

<android.support.v7.widget.CardView

xmlns:android="http://schemas.android.com/apk/res/android"

 xmlns:card_view="http://schemas.android.com/apk/res-auto"

 android:layout_width="match_parent"

 android:layout_height="wrap_content"

 android:orientation="horizontal"

card_view:cardCornerRadius="5dp"

 card_view:cardUseCompatPadding="true">

    <RelativeLayout

 android:layout_width="match_parent"

 android:layout_height="match_parent"

 android:background="?android:selectableItemBackground">

        <TextView

 android:id="@+id/tvName"

 android:layout_width="match_parent"

 android:layout_height="wrap_content"

 android:layout_margin="5dp"

 android:text="Name"

 android:textColor="@android:color/black"

 android:textSize="18sp" />

        <TextView

 android:id="@+id/tvEmailId"

 android:layout_width="match_parent"

 android:layout_height="wrap_content"

 android:layout_below="@+id/tvName"

 android:layout_margin="5dp"

 android:text="Email Id"

 android:textColor="@android:color/black"

 android:textSize="12sp" />
    </RelativeLayout>

</android.support.v7.widget.CardView>

progressbar_item

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout

 xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

 android:layout_height="match_parent"

 android:orientation="vertical" >

    <ProgressBar

 android:id="@+id/progressBar1"

 android:layout_width="wrap_content"

 android:layout_gravity="center_horizontal"

 android:layout_height="wrap_content" />

</LinearLayout>

OnLoadMoreListener

public interface OnLoadMoreListener {
    void onLoadMore();
}

DataAdapter

public class DataAdapter extends RecyclerView.Adapter {
    private final int VIEW_ITEM = 1;
    private final int VIEW_PROG = 0;

    private List<Student> studentList;

    // The minimum amount of items to have below your current scroll position

 // before loading more.

 private int visibleThreshold = 5;
    private int lastVisibleItem, totalItemCount;
    private boolean loading;
    private OnLoadMoreListener onLoadMoreListener;


    public DataAdapter(List<Student> students, RecyclerView recyclerView) {
        studentList = students;
        if (recyclerView.getLayoutManager() instanceof LinearLayoutManager) {
            final LinearLayoutManager linearLayoutManager = (LinearLayoutManager) recyclerView.getLayoutManager();
            recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
                @Override

 public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
                    super.onScrolled(recyclerView, dx, dy);

                    totalItemCount = linearLayoutManager.getItemCount();
                    lastVisibleItem = linearLayoutManager

 .findLastVisibleItemPosition();
                    if (!loading && totalItemCount <= (lastVisibleItem + visibleThreshold)) {
                        // End has been reached

 // Do something                        if (onLoadMoreListener != null) {
                            onLoadMoreListener.onLoadMore();
                        }
                        loading = true;
                    }
                }
            });
        }
    }

    @Override

 public int getItemViewType(int position) {
        return studentList.get(position) != null ? VIEW_ITEM : VIEW_PROG;
    }

    @Override

 public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        RecyclerView.ViewHolder vh;
        if (viewType == VIEW_ITEM) {
            View v = LayoutInflater.from(parent.getContext()).inflate(
                    R.layout.list_row, parent, false);
            vh = new StudentViewHolder(v);
        } else {
            View v = LayoutInflater.from(parent.getContext()).inflate(
                    R.layout.progress_item, parent, false);
            vh = new ProgressViewHolder(v);
        }
        return vh;
    }

    @Override

 public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
        if (holder instanceof StudentViewHolder) {
            Student singleStudent = (Student) studentList.get(position);
            ((StudentViewHolder) holder).tvName.setText(singleStudent.getName());
            ((StudentViewHolder) holder).tvEmailId.setText(singleStudent.getEmailId());
            ((StudentViewHolder) holder).student = singleStudent;
        } else {
            if (((ProgressViewHolder) holder).progressBar != null)
                ((ProgressViewHolder) holder).progressBar.setIndeterminate(true);
        }
    }

    public void setLoaded() {
        loading = false;
    }

    @Override

 public int getItemCount() {
        return studentList.size();
    }

    public void setOnLoadMoreListener(OnLoadMoreListener onLoadMoreListener) {
        this.onLoadMoreListener = onLoadMoreListener;
    }

    public static class StudentViewHolder extends RecyclerView.ViewHolder {
        public TextView tvName;
        public TextView tvEmailId;
        public Student student;

        public StudentViewHolder(View v) {
            super(v);
            tvName = (TextView) v.findViewById(R.id.tvName);
            tvEmailId = (TextView) v.findViewById(R.id.tvEmailId);
            v.setOnClickListener(new OnClickListener() {
                @Override

 public void onClick(View v) {
                    Toast.makeText(v.getContext(),
                            "OnClick :" + student.getName() + " \n " + student.getEmailId(),
                            Toast.LENGTH_SHORT).show();
                }
            });
        }
    }

    public static class ProgressViewHolder extends RecyclerView.ViewHolder {
        public ProgressBar progressBar;

        public ProgressViewHolder(View v) {
            super(v);
            progressBar = (ProgressBar) v.findViewById(R.id.progressBar1);
        }
    }
}

 
MainActivity

public class MainActivity extends AppCompatActivity {
    private TextView tvEmptyView;
    private RecyclerView mRecyclerView;
    private DataAdapter mAdapter;
    private LinearLayoutManager mLayoutManager;
    private List<Student> studentList;
    protected Handler handler;

    @Override    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        tvEmptyView = (TextView) findViewById(R.id.empty_view);
        mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);
        studentList = new ArrayList<Student>();
        handler = new Handler();
        loadData();
        mRecyclerView.setHasFixedSize(true);
        mLayoutManager = new LinearLayoutManager(this);
        mRecyclerView.setLayoutManager(mLayoutManager);
        mAdapter = new DataAdapter(studentList, mRecyclerView);
        mRecyclerView.setAdapter(mAdapter);
        if (studentList.isEmpty()) {
            mRecyclerView.setVisibility(View.GONE);
            tvEmptyView.setVisibility(View.VISIBLE);
        } else {
            mRecyclerView.setVisibility(View.VISIBLE);
            tvEmptyView.setVisibility(View.GONE);
        }
        mAdapter.setOnLoadMoreListener(new OnLoadMoreListener() {
            @Override            public void onLoadMore() {
                studentList.add(null);
                mAdapter.notifyItemInserted(studentList.size() - 1);
                handler.postDelayed(new Runnable() {
                    @Override                    public void run() {
                        studentList.remove(studentList.size() - 1);
                        mAdapter.notifyItemRemoved(studentList.size());
                        int start = studentList.size();
                        int end = start + 20;
                        for (int i = start + 1; i <= end; i++) {
                            studentList.add(new Student("Student " + i, "AndroidStudent" + i + "@gmail.com"));
                            mAdapter.notifyItemInserted(studentList.size());
                        }
                        mAdapter.setLoaded();
                    }
                }, 2000);
            }
        });
    }
    private void loadData() {
        for (int i = 1; i <= 20; i++) {
            studentList.add(new Student("Student " + i, "androidstudent" + i + "@gmail.com"));
        }
    }
}

RecyclerView Swipe Item

RecyclerView Swipe to Dismiss
activity_layout

<android.support.v7.widget.RecyclerView

 xmlns:android="http://schemas.android.com/apk/res/android"

 android:id="@+id/movie_recycler_view"

 android:layout_width="match_parent"

 android:layout_height="match_parent"/>

list_item_movie layout

<?xml version="1.0" encoding="utf-8"?>

 <android.support.v7.widget.CardView
    xmlns:android="http://schemas.android.com/apk/res/android"

 xmlns:card_view="http://schemas.android.com/apk/res-auto"

 android:layout_width="match_parent"

 android:layout_height="wrap_content"

 android:layout_margin="8dp"

 card_view:cardCornerRadius="2dp">

    <TextView

 android:id="@+id/movie_name"

 android:layout_width="match_parent"

 android:layout_height="wrap_content"

 android:textAppearance="?android:attr/textAppearanceMedium"

 android:padding="8dp"/>
    
</android.support.v7.widget.CardView>

build.gradle

apply plugin: 'com.android.application'
android {
    compileSdkVersion 23

 buildToolsVersion "23.0.2"
    defaultConfig {
        applicationId "map.conghuy.com.myapplication"

 minSdkVersion 15

 targetSdkVersion 23

 versionCode 1

 versionName "1.0"    }
    buildTypes {
        release {
            minifyEnabled false

 proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

 }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'

 compile 'com.android.support:appcompat-v7:23.3.0'

 compile 'com.android.support:design:23.3.0'

 compile 'com.android.support:cardview-v7:23.0.0'}

MovieTouchHelper

public class MovieTouchHelper extends ItemTouchHelper.SimpleCallback {
    private MovieAdapter mMovieAdapter;

    public MovieTouchHelper(MovieAdapter movieAdapter){
        super(ItemTouchHelper.UP | ItemTouchHelper.DOWN, ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT);
        this.mMovieAdapter = movieAdapter;
    }

    @Override

 public boolean onMove(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder, RecyclerView.ViewHolder target) {
        mMovieAdapter.swap(viewHolder.getAdapterPosition(), target.getAdapterPosition());
        return true;
    }

    @Override

 public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {
        mMovieAdapter.remove(viewHolder.getAdapterPosition());
    }
}

MovieAdapter

public class MovieAdapter extends RecyclerView.Adapter<MovieAdapter.ViewHolder> {
    private Context mContext;
    private List<Movie> mMovies;

    public MovieAdapter(Context context, List<Movie> movies){
        this.mContext = context;
        this.mMovies = movies;
    }

    @Override

 public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        return new ViewHolder(LayoutInflater.from(mContext).inflate(R.layout.list_item_movie, parent, false));
    }

    @Override

 public void onBindViewHolder(ViewHolder holder, int position) {
        holder.bindMovie(mMovies.get(position));
    }

    @Override

 public int getItemCount() {
        return mMovies.size();
    }

    public void remove(int position) {
        mMovies.remove(position);
        notifyItemRemoved(position);
    }

    public void swap(int firstPosition, int secondPosition){
        Collections.swap(mMovies, firstPosition, secondPosition);
        notifyItemMoved(firstPosition, secondPosition);
    }

    public class ViewHolder extends RecyclerView.ViewHolder{
        public final TextView movieNameTextView;

        public ViewHolder(View view){
            super(view);
            movieNameTextView = (TextView) view.findViewById(R.id.movie_name);
        }

        public void bindMovie(Movie movie){
            this.movieNameTextView.setText(movie.getName());
        }
    }
}

Movie

public class Movie {
    private String name;

    public Movie(String name){
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

MainActivity

public class MainActivity extends AppCompatActivity {

    @Override

 protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Setup RecyclerView

 RecyclerView movieRecyclerView = (RecyclerView) findViewById(R.id.movie_recycler_view);
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
        linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
        movieRecyclerView.setLayoutManager(linearLayoutManager);

        // Setup Adapter

 MovieAdapter movieAdapter = new MovieAdapter(this, getMovies());
        movieRecyclerView.setAdapter(movieAdapter);

        // Setup ItemTouchHelper

 ItemTouchHelper.Callback callback = new MovieTouchHelper(movieAdapter);
        ItemTouchHelper helper = new ItemTouchHelper(callback);
        helper.attachToRecyclerView(movieRecyclerView);
    }

    private List<Movie> getMovies(){
        List<Movie> movieList = new ArrayList<>();
        movieList.add(new Movie("Harry Potter"));
        movieList.add(new Movie("Twilight"));
        movieList.add(new Movie("Star Wars"));
        movieList.add(new Movie("Star Trek"));
        movieList.add(new Movie("Galaxy Quest"));
        return movieList;
    }
}