Veritcal List using RecyclerView Example in Android

activity_main.xml

<?xml version="1.0" encoding="utf-8"?><android.support.v7.widget.RecyclerView
android:id="@+id/recycler_view"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/white"
android:layout_gravity="center"
/>

item_view.xml 

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:background="#efefef"

android:layout_margin="5dp">

<ImageView

android:id="@+id/item_icon"

android:layout_width="40dp"

android:layout_height="40dp"

android:layout_centerVertical="true"

android:layout_alignParentBottom="true"

android:layout_alignParentLeft="true"

android:layout_alignParentStart="true"

android:layout_alignParentTop="true"

android:layout_marginRight="6dip"

android:src="@android:drawable/ic_notification_overlay"/>

<LinearLayout

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_toRightOf="@id/item_icon"

android:layout_centerVertical="true"

android:layout_margin="5dp"

android:padding="5dp"

android:background="@android:color/white"

android:orientation="vertical">

<TextView

android:id="@+id/item_text"

android:layout_width="match_parent"

android:layout_height="26dp"

android:ellipsize="marquee"

android:singleLine="true"

android:textColor="@android:color/black"

android:textSize="16sp"/>

<TextView

android:id="@+id/item_text2"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text=":)"

android:textColor="@android:color/holo_blue_bright"

android:textSize="12sp"/>

</LinearLayout>

</RelativeLayout>

MyRecyclerHolder.java

 package com.rajeshvijayakumar.recycler;

import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;

public class MyRecyclerHolder extends RecyclerView.ViewHolder {

 

public TextView textView;

public ImageView imageView;

public TextView textView2;

 

    public MyRecyclerHolder(View view) {

      super(view);

      this.imageView = (ImageView) view.findViewById(R.id.item_icon);

      this.textView = (TextView) view.findViewById(R.id.item_text);

      this.textView2 =(TextView) view.findViewById(R.id.item_text2);

    }

}

MyRecyclerAdapter.java

package com.rajeshvijayakumar.recycler;

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

public class MyRecyclerAdapter extends RecyclerView.Adapter<MyRecyclerHolder> {

String[] menus;
Context adapContext; public MyRecyclerAdapter(Context context, String[] menu) { adapContext = context; menus = menu;
} @Override
public MyRecyclerHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View view = LayoutInflater.from(viewGroup.getContext()).inflate(
R.layout.item, null);
MyRecyclerHolder viewHolder = new MyRecyclerHolder(view); return viewHolder;
} @Override
public void onBindViewHolder(MyRecyclerHolder viewHolder, int i) { // int length = (menus != null && menus.length > 0) ? menus.length : 0; if (i < length) {
viewHolder.textView.setText(menus[i]);
}
} @Override
public int getItemCount() { return (null != menus ? menus.length : 0);
} //

}

RecyclerDemoActivity.java

package com.rajeshvijayakumar.recycler;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;

public class RecyclerDemoActivity extends AppCompatActivity {

private RecyclerView mRecyclerView;
private MyRecyclerAdapter adapter;
private String[] menus = { "item1", "item2", "item3", "item4", "item5", "item6", "item7", "item8", "item9", "item10",
"item11", "item12", "item13", "item14", "item15", "item16", "item17", "item18", "item19", "item20"};

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

// Initialize recycler view mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
LinearLayoutManager layoutManager = new LinearLayoutManager(this);
layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
mRecyclerView.setLayoutManager(layoutManager);
adapter = new MyRecyclerAdapter(this, menus);
mRecyclerView.setAdapter(adapter);
}
}

Output :

Show Case View Example in Android

activity_main.xml

<RelativeLayout 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"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="This is Original View" />

</RelativeLayout>

overlay_view.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <ImageView
        android:id="@+id/over_lay_image"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:background="#50220000" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginTop="30dp"
        android:text="This is Overlay View" />

</RelativeLayout>

MainActivity.java

package com.rajeshvijayakumar.overlay;

import android.app.Activity;
import android.app.Dialog;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageView;

public class MainActivity extends Activity {

    private ImageView mOverLayImage;
   
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
       
        final Dialog overlayInfo = new Dialog(MainActivity.this);
        overlayInfo.requestWindowFeature(Window.FEATURE_NO_TITLE);
        overlayInfo.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
        overlayInfo.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);
        overlayInfo.setContentView(R.layout.overlay_view);
        overlayInfo.show();
       
        mOverLayImage = (ImageView) overlayInfo.findViewById(R.id.over_lay_image);
        mOverLayImage.setOnClickListener(new OnClickListener() {
           
            @Override
            public void onClick(View v) {               
                overlayInfo.cancel();
            }
        });       
    }
}

Output :

Source Code: Download this Example Here

Sending ArrayList of Objects as extras from one Activity to Other

Question.java

public class Question implements Serializable {

    private int[] operands;
    private int[] choices;
    private int userAnswerIndex;

    public Question(int[] operands, int[] choices) {
        this.operands = operands;
        this.choices = choices;
        this.userAnswerIndex = -1;
    }

    public int[] getChoices() {
        return choices;
    }

    public void setChoices(int[] choices) {
        this.choices = choices;
    }

    public int[] getOperands() {
        return operands;
    }

    public void setOperands(int[] operands) {
        this.operands = operands;
    }

    public int getUserAnswerIndex() {
        return userAnswerIndex;
    }

    public void setUserAnswerIndex(int userAnswerIndex) {
        this.userAnswerIndex = userAnswerIndex;
    }

    public int getAnswer() {
        int answer = 0;
        for (int operand : operands) {
            answer += operand;
        }
        return answer;
    }

    public boolean isCorrect() {
        return getAnswer() == choices[this.userAnswerIndex];
    }

    public boolean hasAnswered() {
        return userAnswerIndex != -1;
    }

    @Override
    public String toString() {
        StringBuilder builder = new StringBuilder();

        // Question
        builder.append("Question: ");
        for(int operand : operands) {
            builder.append(String.format("%d ", operand));
        }
        builder.append(System.getProperty("line.separator"));

        // Choices
        int answer = getAnswer();
        for (int choice : choices) {
            if (choice == answer) {
                builder.append(String.format("%d (A) ", choice));
            } else {
                builder.append(String.format("%d ", choice));
            }
        }
        return builder.toString();
       }

      }

In your Source Activity, use this :

List<Question> mQuestionList = new ArrayList<Question>;

int[] ops = {1,2,3,4,5};

int[] choices = {12,45,23,16};

mQuestionList.add(new Question(ops, choices));

ops1 = {11,22,33,44,55};

choices1 = {122,453,423,516};

mQuestionList.add(new Question(ops1, choices1));

Intent intent = new Intent(SourceActivity.this, TargetActivity.class);

intent.putExtra("QuestionListExtra", ArrayList<Question>mQuestionList);

In your Target Activity, use this :

List<Question> questions = new ArrayList<Question>();

 questions = (ArrayList<Question>)getIntent().getSerializableExtra("QuestionListExtra");

Switching between Activities and passing extras in Android

First, create  user interface layouts that are needed as follows and your project structure should like this :

Project Structure :

main.xml

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >

        <TextView
            android:id="@+id/textView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_alignParentTop="true"
            android:layout_marginLeft="22dp"
            android:layout_marginTop="31dp"
            android:text="UserName"
            android:textAppearance="?android:attr/textAppearanceSmall" />

        <EditText
            android:id="@+id/editText1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignBottom="@+id/textView1"
            android:layout_alignParentRight="true"
            android:ems="10"
            android:inputType="textPersonName" />


        <TextView
            android:id="@+id/textView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignLeft="@+id/textView1"
            android:layout_below="@+id/textView1"
            android:layout_marginTop="38dp"
            android:text="Password"
            android:textAppearance="?android:attr/textAppearanceMedium" />

        <EditText
            android:id="@+id/editText2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignBottom="@+id/textView2"
            android:layout_alignLeft="@+id/editText1"
            android:ems="10"
            android:inputType="textPassword" />

        <Button
            android:id="@+id/button1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_centerVertical="true"
            android:layout_toRightOf="@+id/textView1"
            android:text="Done" />

    </RelativeLayout>

target_layout.xml

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" >

        <TextView
            android:id="@+id/uname_view"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignBaseline="@+id/textView1"
            android:layout_alignBottom="@+id/textView1"
            android:layout_alignParentRight="true"
            android:layout_marginRight="56dp"
            android:text="Large Text"
            android:textAppearance="?android:attr/textAppearanceSmall" />

        <TextView
            android:id="@+id/textView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_alignParentTop="true"
            android:layout_marginLeft="24dp"
            android:layout_marginTop="18dp"
            android:text="UserName"
            android:textAppearance="?android:attr/textAppearanceLarge" />

        <TextView
            android:id="@+id/textView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignLeft="@+id/textView1"
            android:layout_below="@+id/textView1"
            android:layout_marginTop="22dp"
            android:text="EmailId"
            android:textAppearance="?android:attr/textAppearanceLarge" />

        <TextView
            android:id="@+id/pass_view"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignBaseline="@+id/textView2"
            android:layout_alignBottom="@+id/textView2"
            android:layout_toRightOf="@+id/textView1"
            android:text="Large Text"
            android:textAppearance="?android:attr/textAppearanceSmall" />

    </RelativeLayout>

After creating and defining layouts, then you define the following activities

HelloAndroidActivity.java

package com.example.helloandroid;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

public class HelloAndroidActivity extends Activity implements OnClickListener {

    private EditText mUsername;
    private EditText mPassword;
    private Button mDoneButton;

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

        setContentView(R.layout.main);

        mUsername = (EditText) findViewById(R.id.editText1);
        mPassword = (EditText) findViewById(R.id.editText2);
        mDoneButton = (Button) findViewById(R.id.button1);
        mDoneButton.setOnClickListener(this);

    }

    @Override
    public void onClick(View v) {

        if (v.getId() == R.id.button1) {

            String username = mUsername.getText().toString();
            String pass = mPassword.getText().toString();
           
            Intent intent = new Intent(HelloAndroidActivity.this, TargetActivity.class);      
            intent.putExtra("uname", username);
            intent.putExtra("pass", pass);
            startActivity(intent);

        }

    }

}

TargetActivity.java

package com.example.helloandroid;

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

public class TargetActivity extends Activity {

    private TextView mNameView;
    private TextView mPassView;
   
    private String uname;
    private String pass;
   
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.target_layout);
   
        uname = getIntent().getExtras().getString("uname");
        pass = getIntent().getExtras().getString("pass");
   
        mNameView = (TextView) findViewById(R.id.uname_view);
        mPassView = (TextView) findViewById(R.id.pass_view);
       
        mNameView.setText(uname);
        mPassView.setText(pass);
    }   
}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.helloandroid"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk  android:minSdkVersion="7"  android:targetSdkVersion="16" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
       
        <activity
            android:name=".HelloAndroidActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".TargetActivity" />
       
    </application>

</manifest>

Output :

 

 

Source :   Download this Example Here