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                                                            GridView
   
 

We are discussing how to implement grid-view in android. Very easy  you can  create project in eclipse ,you click on File option left side in eclipse. the Grid View is very important layout in android. In this grid view implement image with text.

 first , you can drop grid view in activity_main.xml, show example.

<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"
    tools:context=".MainActivity" >

    <GridView
         android:numColumns="2"
         android:gravity="center"
         android:columnWidth="100dp"
         android:stretchMode="columnWidth"
         android:layout_width="fill_parent"
         android:layout_height="fill_parent"
         android:id="@+id/griditem"
         />


</LinearLayout>

Second, you can create a new item.xml class. res/layout/grid_item.xml. show example

grid_viewitem.xml


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

    <ImageView
        android:id="@+id/grid_image"
        android:layout_width="100dp"
        android:layout_height="100dp">
    </ImageView>

    <TextView
        android:id="@+id/grid_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="15dp"
        android:textSize="9sp" >
    </TextView>

</LinearLayout>



then, the items(for example Image & text) bind in customiseGridView extend baseAdapter in java class. show example.


CustomGrid_Androidbegnner.java

package com. Androidbeginnerpoint.gridview;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class CustomGrid_Androidbegnner extends BaseAdapter{
    private Context mContext;
    private final String[] web;
    private final int[] Imageid;

      public CustomGrid_Androidbegnner(Context c,String[] web,int[] Imageid ) {
          mContext = c;
          this.Imageid = Imageid;
          this.web = web;
      }

      @Override
      public int getCount() {
          // TODO Auto-generated method stub
          return web.length;
      }

      @Override
      public Object getItem(int position) {
          // TODO Auto-generated method stub
          return null;
      }

      @Override
      public long getItemId(int position) {
          // TODO Auto-generated method stub
          return 0;
      }

      @Override
      public View getView(int position, View convertView, ViewGroup parent) {
          // TODO Auto-generated method stub
          View grid;
          LayoutInflater inflater = (LayoutInflater) mContext
              .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

          if (convertView == null) {

              grid = new View(mContext);
              grid = inflater.inflate(R.layout.grid_viewitem, null);
              TextView textView = (TextView) grid.findViewById(R.id.grid_text);
              ImageView imageView = (ImageView)grid.findViewById(R.id.grid_image);
              textView.setText(web[position]);
              imageView.setImageResource(Imageid[position]);
          } else {
              grid = (View) convertView;
          }

          return grid;
      }
}

then , you can used find GirdView and setAdapter() in MainActiviy.java class ,and used ImagArray and textArray  the Array bind in BaseAdapter.



MainActivity.java

package com.CustomGrid_Androidbegnner .gridview;

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

import android.os.Bundle;
import android.app.Activity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.GridView;
import android.widget.Toast;

public class MainActivity extends Activity {
    GridView grid;
    String[] web = {
            "image1",
            "image2",
            "image3",
            "image4",
            "image5",
            "image6",
            "image7",
            "image8"
            

    } ;
    int[] imageId = {
            R.drawable.image,
            R.drawable.imageone,
            R.drawable.imagetwo,
            R.drawable.imagethree,
            R.drawable.imagefour,
            R.drawable.imagefive,
            R.drawable.imagesix,
            R.drawable.imageeight

    };

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

        CustomGrid_Androidbegnner adapter = new CustomGrid_Androidbegnner(MainActivity.this, web, imageId);
        grid=(GridView)findViewById(R.id.griditem);
                grid.setAdapter(adapter);
                grid.setOnItemClickListener(new AdapterView.OnItemClickListener() {

                    @Override
                    public void onItemClick(AdapterView<?> parent, View view,
                                            int position, long id) {
                        Toast.makeText(MainActivity.this, "You Clicked at " +web[+ position], Toast.LENGTH_SHORT).show();

                    }
                });

    }

}




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                        Android Camra & Video

 

I have describe how to integrate camra in our application in android. The camra used two way, first In built in android device,and second one making camra Api in our application.1.Create new android project file-new-android project-android application,open class MainActivity.java.2.camra need set a hardware permission in androidManifest.xml
<!-- Accessing camera hardware -->
<uses-feature android:name="android.hardware.camera" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />

MainActivity.java

package info.androidhive.androidbignnerpoint;

import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

import android.app.Activity;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
import android.widget.VideoView;

public class MainActivity extends Activity {

    // Activity request codes
    private static final int CAMERA_CAPTURE_IMAGE_REQUEST_CODE = 100;
    private static final int CAMERA_CAPTURE_VIDEO_REQUEST_CODE = 200;
    public static final int MEDIA_TYPE_IMAGE = 1;
    public static final int MEDIA_TYPE_VIDEO = 2;

    // directory name to store captured images and videos
    private static final String IMAGE_DIRECTORY_NAME = "Hello Camera";

    private Uri fileUri; // file url to store image/video

    private ImageView imgPreview;
    private VideoView videoPreview;
    private Button btnCapturePicture, btnRecordVideo;

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

        imgPreview = (ImageView) findViewById(R.id.imgPreview);
        videoPreview = (VideoView) findViewById(R.id.videoPreview);
        btnCapturePicture = (Button) findViewById(R.id.btnCapturePicture);
        btnRecordVideo = (Button) findViewById(R.id.btnRecordVideo);

       
        // * Capture image button click event
        
        btnCapturePicture.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // capture picture
                captureImage();
            }
        });

       
         //* Record video button click event
        
        btnRecordVideo.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // record video
                recordVideo();
            }
        });

        // Checking camera availability
        if (!isDeviceSupportCamera()) {
            Toast.makeText(getApplicationContext(),
                    "Sorry doesn't support camera",
                    Toast.LENGTH_LONG).show();
            // will close the app if the device does't have camera
            finish();
        }
    }

   
    // * Checking device has camera hardware or not
    
    private boolean isDeviceSupportCamera() {
        if (getApplicationContext().getPackageManager().hasSystemFeature(
                PackageManager.FEATURE_CAMERA)) {
            // this device has a camera
            return true;
        } else {
            // no camera on this device
            return false;
        }
    }

   
     //* Capturing Camera Image will lauch camera app requrest image capture
    
    private void captureImage() {
        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

        fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);

        intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);

        // start the image capture Intent
        startActivityForResult(intent, CAMERA_CAPTURE_IMAGE_REQUEST_CODE);
    }

   
    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);

        // save file url in bundle as it will be null on scren orientation
        // changes
        outState.putParcelable("file_uri", fileUri);
    }

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

        // get the file url
        fileUri = savedInstanceState.getParcelable("file_uri");
    }

   
   // Recording video
    
    private void recordVideo() {
        Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE);

        fileUri = getOutputMediaFileUri(MEDIA_TYPE_VIDEO);

        // set video quality
        intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);

        intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // set the image file
                                                            // name

        // start the video capture Intent
        startActivityForResult(intent, CAMERA_CAPTURE_VIDEO_REQUEST_CODE);
    }

   
     //* Receiving activity result method will be called after closing the camera
    
    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        // if the result is capturing Image
        if (requestCode == CAMERA_CAPTURE_IMAGE_REQUEST_CODE) {
            if (resultCode == RESULT_OK) {
                // successfully captured the image
                // display it in image view
                previewCapturedImage();
            } else if (resultCode == RESULT_CANCELED) {
                // user cancelled Image capture
                Toast.makeText(getApplicationContext(),
                        "User cancelled image capture", Toast.LENGTH_SHORT)
                        .show();
            } else {
                // failed to capture image
                Toast.makeText(getApplicationContext(),
                        "Sorry! Failed to capture image", Toast.LENGTH_SHORT)
                        .show();
            }
        } else if (requestCode == CAMERA_CAPTURE_VIDEO_REQUEST_CODE) {
            if (resultCode == RESULT_OK) {
                // video successfully recorded
                // preview the recorded video
                previewVideo();
            } else if (resultCode == RESULT_CANCELED) {
                // user cancelled recording
                Toast.makeText(getApplicationContext(),
                        "User cancelled video recording", Toast.LENGTH_SHORT)
                        .show();
            } else {
                // failed to record video
                Toast.makeText(getApplicationContext(),
                        "Sorry! Failed to record video", Toast.LENGTH_SHORT)
                        .show();
            }
        }
    }

   
   //  * Display image from a path to ImageView
    
    private void previewCapturedImage() {
        try {
            // hide video preview
            videoPreview.setVisibility(View.GONE);

            imgPreview.setVisibility(View.VISIBLE);

            // bimatp factory
            BitmapFactory.Options options = new BitmapFactory.Options();

            // downsizing image as it throws OutOfMemory Exception for larger
            // images
            options.inSampleSize = 8;

            final Bitmap bitmap = BitmapFactory.decodeFile(fileUri.getPath(),
                    options);

            imgPreview.setImageBitmap(bitmap);
        } catch (NullPointerException e) {
            e.printStackTrace();
        }
    }

   
    // * Previewing recorded video
    
    private void previewVideo() {
        try {
            // hide image preview
            imgPreview.setVisibility(View.GONE);

            videoPreview.setVisibility(View.VISIBLE);
            videoPreview.setVideoPath(fileUri.getPath());
            // start playing
            videoPreview.start();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    
   
     //* ------------ Helper Methods ----------------------
    

   
     //* Creating file uri to store image/video
   
    public Uri getOutputMediaFileUri(int type) {
        return Uri.fromFile(getOutputMediaFile(type));
    }

   
     //* returning image / video
    
    private static File getOutputMediaFile(int type) {

        // External sdcard location
        File mediaStorageDir = new File(
                Environment
                        .getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
                IMAGE_DIRECTORY_NAME);

        // Create the storage directory if it does not exist
        if (!mediaStorageDir.exists()) {
            if (!mediaStorageDir.mkdirs()) {
                Log.d(IMAGE_DIRECTORY_NAME, "Oops! Failed create "
                        + IMAGE_DIRECTORY_NAME + " directory");
                return null;
            }
        }

        // Create a media file name
        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss",
                Locale.getDefault()).format(new Date());
        File mediaFile;
        if (type == MEDIA_TYPE_IMAGE) {
            mediaFile = new File(mediaStorageDir.getPath() + File.separator
                    + "IMG_" + timeStamp + ".jpg");
        } else if (type == MEDIA_TYPE_VIDEO) {
            mediaFile = new File(mediaStorageDir.getPath() + File.separator
                    + "VID_" + timeStamp + ".mp4");
        } else {
            return null;
        }

        return mediaFile;
    }

}
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