Showing posts with label sdcard. Show all posts

Showing posts with label sdcard. Show all posts

Friday, May 4, 2012

Android - How to Enable "Move to SD card" feature in android?

Android - How to Enable "Move to SD card" feature in android?

Android 2.2 supports application installation on external storage devices like the SD card. This should give users room for many more apps, and will also benefit certain categories, like games, that need huge assets.

The “Manage Applications” screen in the Settings app now has an “On SD Card” tab. The sizes listed in Manage Applications only include the space taken by the application on internal storage.

The Application Info screen now has either a “move to SD card” or “move to phone” button, but this is often disabled. Copy-protected apps and updates to system apps can’t be moved to the SD card, nor can those which are don’t specify that they work on the SD card.

To allow the system to install your application on the external storage, modify your manifest file to include the android:installLocation attribute in the element,android:installLocation => It defines the location where the application will install. It takes one values from the 3 values as shown below:

If you declare "auto", you indicate that your application may be installed on the external storage, but you don't have a preference of install location. The system will decide where to install your application based on several factors. The user can also move your application between the two locations.

If you declare "internalOnly" Install the application on internal storage only. This will result in storage errors if the device runs low on internal storage.

If you declare "preferExternal", you request that your application be installed on the external storage, but the system does not guarantee that your application will be installed on the external storage. If the external storage is full, the system will install it on the internal storage. The user can also move your application between the two locations.

Note: In order to compile your application, change your build target to API Level 8. This is necessary because older Android libraries don't understand theandroid:installLocation attribute and will not compile your application when it's present. So change the build target by editing the project properties (right-click on the project in Eclipse), and choose a target with at least API Level 8.

Monday, April 30, 2012

Select an Image from gallery in ANDROID and show it in an ImageView

Select an Image from gallery in ANDROID and show it in an ImageView.

Hi all
In this tutorial I will show you how to get an image from your phone gallery and show it in an imageview.
Here we use intents to open up the image gallery and get the image URI.
Here I am setting the image type as “image” to get only the images.
And on onActivityResult if the result is OK, then get the data using getData() function and converting the imageURI to the stringPath.
Then show the image in the imageview using setImageURI.

?

package pack.GetImage;

import android.app.Activity;

import android.content.Intent;

import android.database.Cursor;

import android.net.Uri;

import android.os.Bundle;

import android.provider.MediaStore;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.ImageView;

public class GetImageActivity extends Activity {

    private static final int SELECT_PICTURE = 1;

    private String selectedImagePath;

    private ImageView img;

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        img = (ImageView)findViewById(R.id.ImageView01);

        ((Button) findViewById(R.id.Button01))

                .setOnClickListener(new OnClickListener() {

                    public void onClick(View arg0) {

                        Intent intent = new Intent();

                        intent.setType("image/*");

                        intent.setAction(Intent.ACTION_GET_CONTENT);

                        startActivityForResult(Intent.createChooser(intent,"Select Picture"), SELECT_PICTURE);

                    }

                });

    }

    public void onActivityResult(int requestCode, int resultCode, Intent data) {

        if (resultCode == RESULT_OK) {

            if (requestCode == SELECT_PICTURE) {

                Uri selectedImageUri = data.getData();

                selectedImagePath = getPath(selectedImageUri);

                System.out.println("Image Path : " + selectedImagePath);

                img.setImageURI(selectedImageUri);

            }

        }

    }

    public String getPath(Uri uri) {

        String[] projection = { MediaStore.Images.Media.DATA };

        Cursor cursor = managedQuery(uri, projection, null, null, null);

        int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);

        cursor.moveToFirst();

        return cursor.getString(column_index);

    }

}

Here is the main.xml file

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

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

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    >

<TextView

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text="@string/hello"

    />

<Button android:text="Browse gallery"

    android:id="@+id/Button01"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content">

</Button>

<ImageView android:id="@+id/ImageView01"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content">

</ImageView>

</LinearLayout>

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