BeatBox.java
package com.example.aster.beatbox;
import android.content.Context;
import android.content.res.AssetManager;
import android.util.Log;
import java.io.IOException;
public class BeatBox {
private static final String TAG = "BeatBox";
private static final String SOUNDS_FOLDER = "sample_sounds";
private AssetManager mAssets;
public BeatBox(Context context) {
mAssets = context.getAssets();
loadSounds();
}
private void loadSounds() {
String[] soundNames;
try {
soundNames = mAssets.list(SOUNDS_FOLDER);
Log.i(TAG, "Found " + soundNames.length + " sounds");
} catch (IOException ioe) {
Log.e(TAG, "Could not list assets", ioe);
return;
}
}
}
BeatBoxActivity.java
package com.example.aster.beatbox;
import android.support.v4.app.Fragment;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
public class BeatBoxActivity extends SingleFragmentActivity {
@Override
protected Fragment createFragment() {
return BeatBoxFragment.newInstance();
}
}
BeatBoxFragment.java
package com.example.aster.beatbox;
import android.databinding.DataBindingUtil;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.example.aster.beatbox.databinding.FragmentBeatBoxBinding;
import com.example.aster.beatbox.databinding.ListItemSoundBinding;
public class BeatBoxFragment extends Fragment {
public static BeatBoxFragment newInstance() {
return new BeatBoxFragment();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
FragmentBeatBoxBinding binding = DataBindingUtil
.inflate(inflater, R.layout.fragment_beat_box, container, false);
binding.recyclerView.setLayoutManager(new GridLayoutManager(getActivity(), 3));
binding.recyclerView.setAdapter(new SoundAdapter());
return binding.getRoot();
}
private class SoundHolder extends RecyclerView.ViewHolder {
private ListItemSoundBinding mBinding;
private SoundHolder(ListItemSoundBinding binding) {
super(binding.getRoot());
mBinding = binding;
}
}
private class SoundAdapter extends RecyclerView.Adapter<SoundHolder> {
@Override
public SoundHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater inflater = LayoutInflater.from(getActivity());
ListItemSoundBinding binding = DataBindingUtil
.inflate(inflater, R.layout.list_item_sound, parent, false);
return new SoundHolder(binding);
}
@Override
public void onBindViewHolder(SoundHolder holder, int position) {
}
@Override
public int getItemCount() {
return 0;
}
}
}
SingleFragmentActivity.java
package com.example.aster.beatbox;
import android.os.Bundle;
import android.support.annotation.LayoutRes;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v7.app.AppCompatActivity;
public abstract class SingleFragmentActivity extends AppCompatActivity {
protected abstract Fragment createFragment();
@LayoutRes
protected int getLayoutResId() {
return R.layout.activity_fragment;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(getLayoutResId());
FragmentManager fm = getSupportFragmentManager();
Fragment fragment = fm.findFragmentById(R.id.fragment_container);
if (fragment == null) {
fragment = createFragment();
fm.beginTransaction().add(R.id.fragment_container, fragment).commit();
}
}
}
avtivity_fragment.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/fragment_container"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
fragment_beat_box.xml
<?xml version="1.0" encoding="utf-8"?>
<layout
xmlns:android="http://schemas.android.com/apk/res/android">
<android.support.v7.widget.RecyclerView
android:id="@+id/recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</layout>
list_item_sound.xml
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<Button
android:layout_width="match_parent"
android:layout_height="120dp"
tools:text="Sound name"/>
</layout>