Thursday, 20 November 2014

Dynamic Controls Creation in Android


DynamicFieldsActivity.java

import android.animation.LayoutTransition;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;

public class DynamicFieldsActivity extends Activity {

 EditText textIn;
 Button buttonAdd;
 LinearLayout container;
 Button buttonShowAll;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.dynamicfields);
  textIn = (EditText) findViewById(R.id.textin);
  buttonAdd = (Button) findViewById(R.id.add);
  container = (LinearLayout) findViewById(R.id.container);

  buttonAdd.setOnClickListener(new OnClickListener() {

   @Override
   public void onClick(View arg0) {
   
    
    int val=Integer.parseInt(textIn.getText().toString());
    
    
    for (int c = 1; c <=val; c++) {
     
    
     LayoutInflater layoutInflater = (LayoutInflater) getBaseContext()
       .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
     final View addView = layoutInflater.inflate(
       R.layout.dynamicrow, null);

       container.addView(addView, 0);
    
    
    }
    
    
   }
  });

  LayoutTransition transition = new LayoutTransition();
  container.setLayoutTransition(transition);

  buttonShowAll = (Button) findViewById(R.id.showall);
  buttonShowAll.setOnClickListener(new OnClickListener() {

   @Override
   public void onClick(View arg0) {

    String showallPrompt = "";

    int childCount = container.getChildCount();
    showallPrompt += "childCount: " + childCount + "\n\n";

    for (int c = 0; c < childCount; c++) {
     View childView = container.getChildAt(c);
     

     EditText etText = (EditText) (childView
       .findViewById(R.id.etname));

     
     EditText etAge = (EditText) (childView
       .findViewById(R.id.etAge));
     
     
     RadioGroup radioSexGroup = (RadioGroup) childView
       .findViewById(R.id.radioSex);
     
     int selectedId = radioSexGroup.getCheckedRadioButtonId();
     
     RadioButton radioSexButton = (RadioButton) childView.findViewById(selectedId);
     
     String childTextViewText="";

     childTextViewText += (String) (etText.getText().toString());
     
     childTextViewText +=(String)(etAge.getText().toString());
     
     
     childTextViewText +=(String)(radioSexButton.getText().toString());
     
     showallPrompt += c + ": " + childTextViewText + "\n";
    }

    Toast.makeText(DynamicFieldsActivity.this, showallPrompt,
      Toast.LENGTH_LONG).show();
   }
  });
 }
}



dynamicfields.xml


<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:layout_margin="10dp"
    android:padding="5dp" >

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content" >

        <Button
            android:id="@+id/add"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:text="Add" />

        <EditText
            android:id="@+id/textin"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_toLeftOf="@id/add"
            android:inputType="number" />
    </RelativeLayout>

    <Button
        android:id="@+id/showall"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Show Data in Fieldsl" />

    <LinearLayout
        android:id="@+id/container"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        >
    </LinearLayout>

</LinearLayout>


dynamicrow.xml


<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_margin="5dp"
    android:orientation="horizontal"
    android:padding="3dp" 
    >

    <EditText
        android:id="@+id/etname"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="3"
        android:hint="Name"
        android:inputType="textPersonName" >

        <requestFocus />
    </EditText>

    <EditText
        android:id="@+id/etAge"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:ems="10"
        android:hint="Age"
        android:inputType="number" >
    </EditText>

    <RadioGroup
        android:id="@+id/radioSex"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal" 
        android:paddingTop="5dp">

        <RadioButton
            android:id="@+id/radioMale"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:checked="true"
            android:text="M" 
            />

        <RadioButton
            android:id="@+id/radioFemale"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="F"
          />
    </RadioGroup>

</LinearLayout>







ScreenShots






Friday, 14 November 2014

Recycler view with OnClick Implementation with AppCompat




In the Previous Post, We have create list of items with Recyclerview using appcompat.

Now, we have implemented onclick event for each list item..


Clicking on the item , shows you a small toast with data.


I have used the implementation in this project from the following link.
// Implementation of onItemClick RecycleView
// http://stackoverflow.com/questions/24471109/recyclerview-onclick/26196831#26196831


Please see the update Source code 



Monday, 3 November 2014

Recyclerview with Cards example in Android with AppCompat (V7)


I have created a sample application to show RecyclerView and CardView in android with Latest Appcompat Library (V7 Library).
Step 1:
Import three Libary Project to the Eclipse
1) AppCompat 
2) RecyclerView
3) CardView
from the folder android-sdk\extras\android\support\v7
Step 2 :
Create a new Project/download the Source from below, 
and add the three Libary Projects to the MainProject as a Library Projects.

CardViewActivity.java

package com.pratap.cardviews1;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;

public class CardViewActivity extends ActionBarActivity {

 private Toolbar toolbar;

 private RecyclerView mRecyclerView;
 private RecyclerView.Adapter mAdapter;
 private RecyclerView.LayoutManager mLayoutManager;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  toolbar = (Toolbar) findViewById(R.id.toolbar);
  if (toolbar != null) {
   setSupportActionBar(toolbar);

  }

  String[] myDataset = { "Alpha", "Beta", "CupCake", "Donut", "Eclair",
    "Froyo", "Gingerbread", "Honeycomb", "Ice Cream Sandwitch",
    "JellyBean", "KitKat", "LollyPop" };

  mRecyclerView = (RecyclerView) findViewById(R.id.my_recycler_view);

  // getSupportActionBar().setIcon(R.drawable.ic_launcher);

  // getSupportActionBar().setTitle("Android Versions");

  // use this setting to improve performance if you know that changes
  // in content do not change the layout size of the RecyclerView
  mRecyclerView.setHasFixedSize(true);

  // use a linear layout manager
  mLayoutManager = new LinearLayoutManager(this);
  mRecyclerView.setLayoutManager(mLayoutManager);
  
   // specify an adapter (see also next example)
  mAdapter = new CardViewDataAdapter(myDataset);
  mRecyclerView.setAdapter(mAdapter);
 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
  // Inflate the menu; this adds items to the action bar if it is present.
  getMenuInflater().inflate(R.menu.main, 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) {
   Toast.makeText(getApplicationContext(), "Settings Clicked",
     Toast.LENGTH_SHORT).show();
   return true;
  } else if (id == R.id.action_search) {
   Toast.makeText(getApplicationContext(), "Search Clicked",
     Toast.LENGTH_SHORT).show();
   return true;
  }
  return super.onOptionsItemSelected(item);
 }
}


CardViewDataAdapter.java

package com.pratap.cardviews1;

import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class CardViewDataAdapter extends RecyclerView.Adapter<CardViewDataAdapter.ViewHolder> {
 public String[] mDataset;

 

 // Provide a suitable constructor (depends on the kind of dataset)
 public CardViewDataAdapter(String[] myDataset) {
  mDataset = myDataset;
 }

 // Create new views (invoked by the layout manager)
 @Override
 public CardViewDataAdapter.ViewHolder onCreateViewHolder(ViewGroup parent,
   int viewType) {
  // create a new view
  View itemLayoutView = LayoutInflater.from(parent.getContext()).inflate(
    R.layout.cardview_row, null);

  // create ViewHolder

  ViewHolder viewHolder = new ViewHolder(itemLayoutView);
  return viewHolder;
 }

 // Replace the contents of a view (invoked by the layout manager)
 @Override
 public void onBindViewHolder(ViewHolder viewHolder, int position) {

  // - get data from your itemsData at this position
  // - replace the contents of the view with that itemsData

  viewHolder.tvtinfo_text.setText(mDataset[position].toString());

 }

 // Return the size of your dataset (invoked by the layout manager)
 @Override
 public int getItemCount() {
  return mDataset.length;
 }

 // inner class to hold a reference to each item of RecyclerView
 public static class ViewHolder extends RecyclerView.ViewHolder {

  public TextView tvtinfo_text;

  public ViewHolder(View itemLayoutView) {
   super(itemLayoutView);
   tvtinfo_text = (TextView) itemLayoutView
     .findViewById(R.id.info_text);

  }
 }

}


toolbar.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="?attr/colorPrimaryDark"/>

activity_main.xml

<?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:background="#c9c9c9"
    android:orientation="vertical" >

    <!-- A RecyclerView with some commonly used attributes -->

    <include
        android:id="@+id/toolbar"
        layout="@layout/toolbar" />

    <android.support.v7.widget.RecyclerView
        android:id="@+id/my_recycler_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_margin="5dp"
        android:scrollbars="vertical" />

</LinearLayout>


cardview_row.xml

<?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="match_parent"
    android:layout_margin="5dp"
    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/info_text"
            android:layout_width="match_parent"
            android:layout_height="75dp"
            android:layout_centerInParent="true"
            android:gravity="center"
            android:textColor="@android:color/black"
            android:textSize="24sp" />
    </RelativeLayout>

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


Link   Source code





ScreenShots




OkHttp 3 Example in Android

Building Simple app using OkHttp Networking Library to get the users data from https://randomuser.me/ API. RecyclerView to show the users ...