Pro Tips for Optimizing Android Gradle Builds

 Following the configuration changes per your system RAM to make gradle build faster for the android project.

Step:-1 In gradle.properties turn on below line.

org.gradle.parallel=true: Excellent for parallel task execution.

Step:-2 gradle=build -x lint -x lintVitalBasicRelease

Good for development builds, excluding time-consuming lint checks. Remember to run these before release!

Step3: This is important one,Increase jvmargs memory

org.gradle.jvmargs=-Xmx8g -XX:MaxMetaspaceSize=512m -Dkotlin.daemon.jvm.options="-Xmx8g" -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8 -XX:+UseParallelGC:

• -Xmx8g: 8GB heap for Gradle daemon. Suitable for larger projects.

• -XX:MaxMetaspaceSize=512m: Metaspace size. Increase if you get OutOfMemoryError: Metaspace.

• -Dkotlin.daemon.jvm.options="-Xmx8g": Correctly sets Kotlin daemon memory.

• -XX:+HeapDumpOnOutOfMemoryError: Helps in debugging memory issues.

• -Dfile.encoding=UTF-8: Good for file encoding.

• -XX:+UseParallelGC: Enables parallel garbage collection.

Make sure the Heap memory should be increased based on host system ram range.

Step:4 Uses AndroidX,

android.useAndroidX=true

Step:5 Disables Jetifier.

android.enableJetifier=false: Disables Jetifier. This is good if you've migrated fully to AndroidX. If you still have dependencies using the old support library, this needs to be true (or the line removed, as the default is true).

Step:6 nonTransitiveRClass

android.nonTransitiveRClass=false: This can significantly improve build times, but can also cause runtime errors if not handled carefully.

Step:6 nonFinalResIds

android.nonFinalResIds=false: Prevents non-final resource IDs. Generally, keeping this false is safer, but there are potential performance gains in specific situations if set to true.

See below is your gradle.properties

org.gradle.parallel=true 

org.gradle.configuration-cache=true # Enable configuration caching 

org.gradle.caching=true # Enable the Gradle build cache

gradle=build -x lint -x lintVitalBasicRelease # Exclude lint for faster dev builds 

org.gradle.jvmargs=-Xmx8g -XX:MaxMetaspaceSize=512m -Dkotlin.daemon.jvm.options="-Xmx8g" -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8 -XX:+UseParallelGC android.useAndroidX=true 

android.enableJetifier=false # Or true, depending on your dependencies android.defaults.buildfeatures.buildconfig=true 

android.nonTransitiveRClass=true # Enable non-transitive R classes (TEST THOROUGHLY) android.nonFinalResIds=false # Keep false unless you know what you're doing

Show TextView/Text in Center in Compose

Here is a simple way to put your View/Text/TextView as a center, Use Box for showing your content as the center inside the view.

Please find below compose function.

Be noted that fontSize Modifier is part of Experimental API, It may change later.

Material design with use of android design support library

Google recently on 25 May 2015 post update in support library which have few major components which are useful for creating app which look like more materials .

You can check this official blog http://android-developers.blogspot.in/2015/05/android-design-support-library.html.

From that i have created a demo that showing uses of this library .

You can find it on https://github.com/Himanshu4003/MaterialDesign

Let ' s check android L ' s new UI RecyclerView

As per Google Document RecyclerView is a more advanced and flexible version of ListView.

This widget is a container for large sets of views that can be recycled and scrolled very efficiently. Use the RecyclerView widget when you have lists with elements that change dynamically.

The RecyclerView has been developed with extensibility in mind, so it is possible to create any kind of layout you can think of, but not without a little pain-in-the-ass dose. This is Android, so things are never easy.

If you want to use a RecyclerView, you will need to feel comfortable with three elements:

- RecyclerView.Adapter
- LayoutManager
- ItemAnimator

• A layout manager for positioning items

• Default animations for common item operations

RecyclerView is easy to use, because it provides:

You also have the flexibility to define custom layout managers and animations for this widget.

To use the RecyclerView widget, you have to specify an adapter and a layout manager. To create an adapter, you extend the RecyclerView.Adapter class. The details of the implementation depend on the specifics of your dataset and the type of views. For more information, see the examples below.

We can use RecyclerView from Api version 7 in android .

Let me make my first list with RecyclerView and share my code with you all.


Below is my Activity class which use RecycleView to show list items.

import java.util.ArrayList;

import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.RecyclerView.LayoutManager;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;

public class RecycleActivity extends ActionBarActivity {

   
    private RecyclerView mRecyclerView;
   
    private ListAdapter mListAdapter;
   
   
    private ArrayList<String> mArrayList=new ArrayList<String>();
   
   
    private LayoutManager mLayoutManager;
   
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_recycle);
      
        initView();
      
    }
   
   
    private void initView(){
      
        mRecyclerView=(RecyclerView)findViewById(R.id.recycle_view);
      
        mRecyclerView.setHasFixedSize(true);
      
        mLayoutManager=new LinearLayoutManager(this);
      
        mRecyclerView.setLayoutManager(mLayoutManager);
      
        mArrayList.clear();
      
        for (int i=0;i<30;i++){
          
            mArrayList.add("Listview Item  at Position "+ i);
          
        }
      
      
        mListAdapter=new ListAdapter(mArrayList);
      
        mRecyclerView.setAdapter(mListAdapter);
      
      
    }
   
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.recycle, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
}

Here is my Adapter Class to bind data in to RecycleView


import java.util.ArrayList;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.RecyclerView.ViewHolder;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;

public class ListAdapter extends RecyclerView.Adapter<ViewHolder>{
   
    private ArrayList<String> mArrayData;
   
   
    public ListAdapter(ArrayList<String> mArrayListUpdate){
       
        this.mArrayData=mArrayListUpdate;
       
    }
   
    public static class ViewHolder extends android.support.v7.widget.RecyclerView.ViewHolder{
       
        public ViewHolder(View view) {
            super(view);
            // TODO Auto-generated constructor stub
           
            mRlRowView=(RelativeLayout) view;
           
            mTxtView=(TextView) mRlRowView.findViewById(R.id.txt_title);
           
            mImgView=(ImageView)mRlRowView.findViewById(R.id.img_row);
           
            mCheckBox=(CheckBox)mRlRowView.findViewById(R.id.checkbox_item);
           
        }

        CheckBox mCheckBox;
       
        ImageView mImgView;
       
        TextView mTxtView;
       
        RelativeLayout mRlRowView;
    }

    @Override
    public int getItemCount() {
        // TODO Auto-generated method stub
        return mArrayData.size();
       
    }
   
   
     // Replace the contents of a view (invoked by the layout manager)
    @Override
    public void onBindViewHolder(
            android.support.v7.widget.RecyclerView.ViewHolder viewHolder, final int position) {
        // TODO Auto-generated method stub
       
        Log.i("LOG_TAG", "onBindViewHolder-->"+ position);
       
        ViewHolder mViewHolder=((ViewHolder)viewHolder);
       
        mViewHolder.mTxtView.setText(mArrayData.get(position));
       
        mViewHolder.mCheckBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
           
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
                // TODO Auto-generated method stub
               
                Log.w("LOG_TAG", "onCheckedChanged is"+ isChecked + "Position is"+ position);
               
            }
        });
   
    }

    @Override
    public android.support.v7.widget.RecyclerView.ViewHolder onCreateViewHolder(
            ViewGroup viewGroup, int viewType) {
        // TODO Auto-generated method stub
        // create a new view

        Log.i("LOG_TAG", "onCreateViewHolder-->");
        View mView=LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.list_row_item, viewGroup, false);
       
         // set the view's size, margins, paddings and layout parameters

        ViewHolder mViewHolder=new ViewHolder(mView);
       
       
        return mViewHolder;
    }
   }

Here is download link for my created Demo :
https://drive.google.com/file/d/0B-8An4Rd1nmKcU93VHU1Y1FWTG8/view?usp=sharing
It's Goog Drive link and from top there is download icons from there you can easily download whole code.