org.iteventviewer.app.LicenseActivity.java Source code

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Here is the source code for org.iteventviewer.app.LicenseActivity.java

Source

package org.iteventviewer.app;

import android.content.Context;
import android.content.Intent;
import android.content.res.AssetManager;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import butterknife.ButterKnife;
import butterknife.InjectView;
import com.google.common.base.Charsets;
import com.google.common.io.Closeables;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;
import org.iteventviewer.common.DividerItemDecoration;
import org.iteventviewer.common.SimpleRecyclerAdapter;
import rx.Observable;
import rx.Subscriber;
import rx.Subscription;
import rx.android.app.AppObservable;
import rx.android.schedulers.AndroidSchedulers;
import rx.functions.Action0;
import rx.functions.Action1;
import rx.schedulers.Schedulers;
import rx.subscriptions.Subscriptions;
import timber.log.Timber;

public class LicenseActivity extends ToolBarActivity {

    @InjectView(R.id.recyclerView)
    RecyclerView recyclerView;

    LicenseAdapter adapter;

    private Subscription subscription = Subscriptions.empty();

    public static void launch(Context context) {
        context.startActivity(new Intent(context, LicenseActivity.class));
    }

    @Override
    protected int contentView() {
        return R.layout.activity_license;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        recyclerView.setPadding(recyclerView.getPaddingLeft(),
                recyclerView.getPaddingTop() + getResources().getDimensionPixelSize(R.dimen.space_sm),
                recyclerView.getPaddingRight(), recyclerView.getPaddingBottom());

        recyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));

        adapter = new LicenseAdapter(this);
        recyclerView.setAdapter(adapter);

        recyclerView.addItemDecoration(
                new DividerItemDecoration(getResources().getDrawable(R.drawable.divider_sm_tranpaent)));

        Observable<String> licenseTextStream = licenseTextStream(getAssets());

        subscription = bind(licenseTextStream).subscribeOn(AndroidSchedulers.mainThread())
                .subscribe(new Action1<String>() {
                    @Override
                    public void call(String s) {
                        adapter.addItem(s);
                    }
                }, new Action1<Throwable>() {
                    @Override
                    public void call(Throwable throwable) {
                        Timber.e(throwable, throwable.getMessage());
                    }
                }, new Action0() {
                    @Override
                    public void call() {
                    }
                });
    }

    @Override
    protected void onDestroy() {
        subscription.unsubscribe();
        super.onDestroy();
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
        case android.R.id.home:
            finish();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    private static Observable<String> licenseTextStream(final AssetManager assetManager) {
        return Observable.create(new Observable.OnSubscribe<String>() {

            @Override
            public void call(Subscriber<? super String> subscriber) {

                BufferedReader reader = null;
                try {
                    String[] fileNames = assetManager.list("licenses");

                    for (String fileName : fileNames) {
                        InputStream is = assetManager.open("licenses/" + fileName);

                        reader = new BufferedReader(new InputStreamReader(is, Charsets.UTF_8));

                        StringBuilder builder = new StringBuilder();
                        char[] charBuffer = new char[8 * 1024];
                        int r;
                        while ((r = reader.read(charBuffer)) != -1) {
                            builder.append(charBuffer, 0, r);
                        }
                        subscriber.onNext(builder.toString());
                    }
                } catch (IOException e) {
                    subscriber.onError(e);
                } finally {
                    Closeables.closeQuietly(reader);
                    subscriber.onCompleted();
                }
            }
        }).observeOn(Schedulers.io());
    }

    class LicenseAdapter extends SimpleRecyclerAdapter<String, LicenseAdapter.ViewHolder> {

        private List<String> items;

        public LicenseAdapter(Context context) {
            super(context);
            items = new ArrayList<>();
        }

        public String getItem(int position) {
            return items.get(position);
        }

        public void addItem(String item) {
            items.add(item);
            notifyItemInserted(items.size() - 1);
        }

        @Override
        public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            return new ViewHolder(inflater.inflate(R.layout.item_license, parent, false));
        }

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

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

        class ViewHolder extends RecyclerView.ViewHolder {

            @InjectView(R.id.contents)
            TextView contents;

            public ViewHolder(View itemView) {
                super(itemView);
                ButterKnife.inject(this, itemView);
            }
        }
    }
}