Code templates for Android Studio ref: http://qiita.com/KeithYokoma/items/c046dcb54607262c041a

Activity.java

package ${PACKAGE_NAME};

import android.app.Activity;
import android.os.Bundle;

#parse("File Header.java")
public class ${NAME} extends Activity {
    public static final String TAG = ${NAME}.class.getSimpleName();

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
    }
}

Class.java

#if (${PACKAGE_NAME} && ${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end
#parse("File Header.java")
public class ${NAME} {
    public static final String TAG = ${NAME}.class.getSimpleName();
}

Fragment.java

package ${PACKAGE_NAME};

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

#parse("File Header.java")
public class ${NAME} extends Fragment {
    public static final String TAG = ${NAME}.class.getSimpleName();

    // Note: only the system can call this constructor by reflection. 
    public ${NAME}() {}

    public static ${NAME} getInstance() {
        ${NAME} fragment = new ${NAME}();
        Bundle args = new Bundle();
        fragment.setArguments(args);
        return fragment;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return null;
    }
}

Loader.java

#if (${PACKAGE_NAME} && ${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end

import android.support.v4.content.AsyncTaskLoader;

#parse("File Header.java")
public class ${NAME} extends AsyncTaskLoader<${RESULT}> {
    public static final String TAG = ${NAME}.class.getSimpleName();

    public ${NAME}(Context context) {
        super(context);
    }

    @Override
    public ${RESULT} loadInBackground() {
        return null;
    }

    @Override
    public void onStartLoading() {
        super.onStartLoading();
        forceLoad();
    }
}

LoaderWithCache.java

#if (${PACKAGE_NAME} && ${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end

import android.support.v4.content.AsyncTaskLoader;

#parse("File Header.java")
public class ${NAME} extends AsyncTaskLoader<${RESULT}> {
    public static final String TAG = ${NAME}.class.getSimpleName();
    private ${CACHE_TYPE} mCache;

    public ${NAME}(Context context) {
        super(context);
    }

    @Override
    public ${RESULT} loadInBackground() {
        return null;
    }

    @Override
    public void deliverResult(${RESULT} data) {
        if (isReset()) {
            if (mCache != null) {
                mCache = null;
            }
            return;
        }

        mCache = data;

        if (isStarted()) {
            super.deliverResult(data);
        }
    }

    @Override
    public void onStartLoading() {
        if (this.result != null) {
            deliverResult(mCache);
        }
        if (takeContentChanged() || mCache == null) {
            forceLoad();
        }
    }

    @Override
    protected void onStopLoading() {
        super.onStopLoading();
        cancelLoad();
    }

    @Override
    protected void onReset() {
        super.onReset();
        onStopLoading();
    }
}

Parcelable.java

#if (${PACKAGE_NAME} && ${PACKAGE_NAME} != "") package ${PACKAGE_NAME};#end

import android.os.Parcel;
import android.os.Parcelable;
import android.os.Parcelable.Creator;

#parse("File Header.java")
public class ${NAME} implements Parcelable{
    public static final String TAG = ${NAME}.class.getSimpleName();
    public static final Creator<${NAME}> CREATOR = new Creator<${NAME}>() {
        @Nullable
        @Override
        public ${NAME} createFromParcel(Parcel source) {
            return new ${NAME}(source);
        }

        @Override
        public ${NAME}[] newArray(int size) {
            return new ${NAME}[size];
        }
    }

    public ${NAME}(Parcel source) {

    }

    @Override
    public int describeContents() {
        return 0;
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {

    }
}

ParcelableWithBuilder.java

#if (${PACKAGE_NAME} && ${PACKAGE_NAME} != "") package ${PACKAGE_NAME};#end

import android.os.Parcel;
import android.os.Parcelable;
import android.os.Parcelable.Creator;

#parse("File Header.java")
public class ${NAME} implements Parcelable{
    public static final String TAG = ${NAME}.class.getSimpleName();
    public static final Creator<${NAME}> CREATOR = new Creator<${NAME}>() {
        @Nullable
        @Override
        public ${NAME} createFromParcel(Parcel source) {
            return new ${NAME}(source);
        }

        @Override
        public ${NAME}[] newArray(int size) {
            return new ${NAME}[size];
        }
    }

    // Note: only the builder of this type can call this constructor.
    private ${NAME} () {}

    public ${NAME}(Parcel source) {

    }

    @Override
    public int describeContents() {
        return 0;
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {

    }

    public static class Builder {
        private final ${NAME} mTarget;

        public Builder() {
            mTarget = new ${NAME}();
        }

        public ${NAME} create() {
            return mTarget;
        }
    }
}

Singleton.java

#if (${PACKAGE_NAME} && ${PACKAGE_NAME} != "")package ${PACKAGE_NAME};#end
#parse("File Header.java")
public class ${NAME}{
    public static final String TAG = ${NAME}.class.getSimpleName();
    private static ${NAME} ourInstance = new ${NAME}();

    public static ${NAME} getInstance() {
        return ourInstance;
    }

    private ${NAME}() {
    }
}

Utility.java

#if (${PACKAGE_NAME} && ${PACKAGE_NAME} != "") package ${PACKAGE_NAME};#end
#parse("File Header.java")
public final class ${NAME} {
    private ${NAME}() {
        throw new AssertionError("constructor of the utility class should not be called");
    }
}