Category: Android

public class AsyncTaskTestActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);  

        // This starts the AsyncTask
        // Doesn't need to be in onCreate()
        new MyTask().execute("my string parameter");
    }

    // Here is the AsyncTask class:
    //
    // AsyncTask<Params, Progress, Result>.
    //    Params – the type (Object/primitive) you pass to the AsyncTask from .execute() 
    //    Progress – the type that gets passed to onProgressUpdate()
    //    Result – the type returns from doInBackground()
    // Any of them can be String, Integer, Void, etc. 

    private class MyTask extends AsyncTask<String, Integer, String> {

        // Runs in UI before background thread is called
        @Override
        protected void onPreExecute() {
            super.onPreExecute();

            // Do something like display a progress bar
        }

        // This is run in a background thread
        @Override
        protected String doInBackground(String... params) {
            // get the string from params, which is an array
            String myString = params[0];

            // Do something that takes a long time, for example:
            for (int i = 0; i <= 100; i++) {

                // Do things

                // Call this to update your progress
                publishProgress(i);
            }

            return "this string is passed to onPostExecute";
        }

        // This is called from background thread but runs in UI
        @Override
        protected void onProgressUpdate(Integer... values) {
            super.onProgressUpdate(values);

            // Do things like update the progress bar
        }

        // This runs in UI when background thread finishes
        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);

            // Do things like hide the progress bar or change a TextView
        }
    }
}

private class DownloadFilesTask extends AsyncTask<URL, Integer, Long> {
    protected Long doInBackground(URL... urls) {
        int count = urls.length;
        long totalSize = 0;
        for (int i = 0; i < count; i++) {
            totalSize += Downloader.downloadFile(urls[i]);
            publishProgress((int) ((i / (float) count) * 100));
                 // Escape early if cancel() is called
            if (isCancelled()) break;
        }
        return totalSize;
    }

    protected void onProgressUpdate(Integer... progress) {
        setProgressPercent(progress[0]);
    }

    protected void onPostExecute(Long result) {
        showDialog("Downloaded " + result + " bytes");
    }
}

    <?xml version="1.0" encoding="utf-8"?>  
    <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"  
        android:paddingBottom="@dimen/activity_vertical_margin"  
        android:paddingLeft="@dimen/activity_horizontal_margin"  
        android:paddingRight="@dimen/activity_horizontal_margin"  
        android:paddingTop="@dimen/activity_vertical_margin"  
        tools:context="com.example.test.listviewwithimage.MainActivity">  
      
        <ListView  
            android:id="@+id/list"  
            android:layout_width="match_parent"  
            android:layout_height="wrap_content"  
            android:layout_marginBottom="50dp">  
        </ListView>  
    </RelativeLayout>  

    <?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:orientation="horizontal" >  
      
        <ImageView  
            android:id="@+id/icon"  
            android:layout_width="60dp"  
            android:layout_height="60dp"  
            android:padding="5dp" />  
      
        <LinearLayout android:layout_width="wrap_content"  
            android:layout_height="wrap_content"  
            android:orientation="vertical">  
          
        <TextView  
            android:id="@+id/title"  
            android:layout_width="wrap_content"  
            android:layout_height="wrap_content"  
            android:text="Medium Text"  
            android:textStyle="bold"  
            android:textAppearance="?android:attr/textAppearanceMedium"  
            android:layout_marginLeft="10dp"  
            android:layout_marginTop="5dp"  
            android:padding="2dp"  
            android:textColor="#4d4d4d" />  
        <TextView  
            android:id="@+id/subtitle"  
            android:layout_width="wrap_content"  
            android:layout_height="wrap_content"  
            android:text="TextView"   
            android:layout_marginLeft="10dp"/>  
        </LinearLayout>  
    </LinearLayout>  

    package com.example.test.listviewwithimage;  
      
    import android.support.v7.app.AppCompatActivity;  
    import android.os.Bundle;  
    import android.view.View;  
    import android.widget.AdapterView;  
    import android.widget.ListView;  
    import android.widget.Toast;  
      
    public class MainActivity extends AppCompatActivity {  
        ListView list;  
      
        String[] maintitle ={  
                "Title 1","Title 2",  
                "Title 3","Title 4",  
                "Title 5",  
        };  
      
        String[] subtitle ={  
                "Sub Title 1","Sub Title 2",  
                "Sub Title 3","Sub Title 4",  
                "Sub Title 5",  
        };  
      
        Integer[] imgid={  
                R.drawable.download_1,R.drawable.download_2,  
                R.drawable.download_3,R.drawable.download_4,  
                R.drawable.download_5,  
        };  
        @Override  
        protected void onCreate(Bundle savedInstanceState) {  
            super.onCreate(savedInstanceState);  
            setContentView(R.layout.activity_main);  
      
            MyListAdapter adapter=new MyListAdapter(this, maintitle, subtitle,imgid);  
            list=(ListView)findViewById(R.id.list);  
            list.setAdapter(adapter);  
      
      
            list.setOnItemClickListener(new AdapterView.OnItemClickListener() {  
      
                @Override  
                public void onItemClick(AdapterView<?> parent, View view,int position, long id) {  
                    // TODO Auto-generated method stub  
                    if(position == 0) {  
                        //code specific to first list item  
                        Toast.makeText(getApplicationContext(),"Place Your First Option Code",Toast.LENGTH_SHORT).show();  
                    }  
      
                    else if(position == 1) {  
                        //code specific to 2nd list item  
                        Toast.makeText(getApplicationContext(),"Place Your Second Option Code",Toast.LENGTH_SHORT).show();  
                    }  
      
                    else if(position == 2) {  
      
                        Toast.makeText(getApplicationContext(),"Place Your Third Option Code",Toast.LENGTH_SHORT).show();  
                    }  
                    else if(position == 3) {  
      
                        Toast.makeText(getApplicationContext(),"Place Your Forth Option Code",Toast.LENGTH_SHORT).show();  
                    }  
                    else if(position == 4) {  
      
                        Toast.makeText(getApplicationContext(),"Place Your Fifth Option Code",Toast.LENGTH_SHORT).show();  
                    }  
      
                }  
            });  
        }  
    }  

package com.example.test.listviewwithimage;  
  
import android.app.Activity;  
  
import android.view.LayoutInflater;  
import android.view.View;  
import android.view.ViewGroup;  
import android.widget.ArrayAdapter;  
import android.widget.ImageView;  
import android.widget.TextView;  
  
public class MyListAdapter extends ArrayAdapter<String> {  
  
    private final Activity context;  
    private final String[] maintitle;  
    private final String[] subtitle;  
    private final Integer[] imgid;  
  
    public MyListAdapter(Activity context, String[] maintitle,String[] subtitle, Integer[] imgid) {  
        super(context, R.layout.mylist, maintitle);  
        // TODO Auto-generated constructor stub  
  
        this.context=context;  
        this.maintitle=maintitle;  
        this.subtitle=subtitle;  
        this.imgid=imgid;  
  
    }  
  
    public View getView(int position,View view,ViewGroup parent) {  
        LayoutInflater inflater=context.getLayoutInflater();  
        View rowView=inflater.inflate(R.layout.mylist, null,true);  
  
        TextView titleText = (TextView) rowView.findViewById(R.id.title);  
        ImageView imageView = (ImageView) rowView.findViewById(R.id.icon);  
        TextView subtitleText = (TextView) rowView.findViewById(R.id.subtitle);  
  
        titleText.setText(maintitle[position]);  
        imageView.setImageResource(imgid[position]);  
        subtitleText.setText(subtitle[position]);  
  
        return rowView;  
  
    };  
} 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <ListView
        android:id="@+id/listView"
        android:listSelector="@color/colorAccent"
        android:dividerHeight="2dp"
        android:divider="#ddd"
        android:layout_width="match_parent"
        android:layout_height="match_parent"></ListView>

</LinearLayout>

<?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">

    <TextView xmlns:android="http://schemas.android.com/apk/res/android"
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Medium Text"
        android:textStyle="bold"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:layout_marginLeft="10dp"
        android:layout_marginTop="5dp"
        android:padding="2dp"
        android:textColor="#4d4d4d"
        />
</LinearLayout>

<resources>
    <string name="app_name">ListViewFromArray</string>
    <string-array name="array_technology">
        <item>Android</item>
        <item>Java</item>
        <item>Php</item>
        <item>Hadoop</item>
        <item>Sap</item>
        <item>Python</item>
        <item>Ajax</item>
        <item>C++</item>
        <item>Ruby</item>
        <item>Rails</item>
        <item>.Net</item>
        <item>Perl</item>
    </string-array>
</resources>

package com.example.oleetech.listviewfromarray;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    ListView listView;
    TextView textView;
    String[] listItem;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        listView=(ListView)findViewById(R.id.listView);
        textView=(TextView)findViewById(R.id.textView);
        listItem = getResources().getStringArray(R.array.array_technology);
        final ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                R.layout.mylist,R.id.textView, listItem);
        listView.setAdapter(adapter);

        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
                // TODO Auto-generated method stub
                String value=adapter.getItem(position);
                Toast.makeText(getApplicationContext(),value,Toast.LENGTH_SHORT).show();

            }
        });
    }
}

    final ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, android.R.id.textView, listItem);

        }
    });

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.mssql">
    // For Internet Connection Use Below Line
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
    <application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:roundIcon="@mipmap/ic_launcher_round"
        android:supportsRtl="true"
        android:theme="@style/AppTheme">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>