Tries to create photo placeholder and launch camera app - Android Camera

Android examples for Camera:Photo

  1. HOME
  2. Android
  3. Camera
  4. Photo

Description

Tries to create photo placeholder and launch camera app

Demo Code


//package com.java2s;
import android.app.Activity;
import android.app.Fragment;
import android.content.ActivityNotFoundException;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.Cursor;
import android.net.Uri;

import android.provider.MediaStore;
import java.io.File;

public class Main {
    private static final String[] PROJECTION = new String[] { MediaStore.MediaColumns.DATA };
    private static final ContentValues CONTENT_VALUES = new ContentValues(1);
    private static final String PHOTO_SHARED_PREFS_NAME = "photo_shared";
    private static final String PHOTO_URI = "photo_uri";

    /**//  w  ww.j  ava 2 s  .  co  m
     * Tries to create photo placeholder and launch camera app
     * @param requestCode your unique code that will be returned in onActivityResult
     * @param caller caller Activity
     * @param photoKey key in Shared Preferences for taken image, can be null
     * @throws android.content.ActivityNotFoundException if no camera app was found
     * @throws Exception if there is a problem with create photo eg. SDcard is not mounted. It may be eg. {@link IllegalStateException} or {@link UnsupportedOperationException} depending on {@link ContentResolver}.
     */
    public static void launchCameraApp(int requestCode, Activity caller,
            String photoKey) throws Exception {
        if (photoKey == null) {
            photoKey = PHOTO_URI;
        }

        ContentResolver cr = caller.getContentResolver();
        Uri takenPhotoUri = cr.insert(
                MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                CONTENT_VALUES);
        if (takenPhotoUri == null) {
            throw new IllegalStateException("Photo insertion failed");
        }
        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        intent.putExtra(MediaStore.EXTRA_OUTPUT,
                getIntentUri(takenPhotoUri, cr));
        caller.startActivityForResult(intent, requestCode);

        SharedPreferences prefs = caller.getSharedPreferences(
                PHOTO_SHARED_PREFS_NAME, Context.MODE_PRIVATE);

        prefs.edit().putString(photoKey, takenPhotoUri.toString()).commit();
    }

    public static void launchCameraApp(int requestCode, Fragment caller,
            String photoKey) throws Exception {
        if (photoKey == null) {
            photoKey = PHOTO_URI;
        }

        Activity activity = caller.getActivity();
        if (activity != null) {
            ContentResolver cr = caller.getActivity().getContentResolver();
            Uri takenPhotoUri = cr.insert(
                    MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                    CONTENT_VALUES);
            if (takenPhotoUri == null) {
                throw new IllegalStateException("Photo insertion failed");
            }
            Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            intent.putExtra(MediaStore.EXTRA_OUTPUT,
                    getIntentUri(takenPhotoUri, cr));
            caller.startActivityForResult(intent, requestCode);

            SharedPreferences prefs = caller.getActivity()
                    .getSharedPreferences(PHOTO_SHARED_PREFS_NAME,
                            Context.MODE_PRIVATE);

            prefs.edit().putString(photoKey, takenPhotoUri.toString())
                    .commit();
        } else {
            throw new ActivityNotFoundException();
        }
    }

    private static Uri getIntentUri(Uri takenPhotoUri, ContentResolver cr) {
        String path = getPhotoFilePath(takenPhotoUri, cr);
        if (path == null) {
            throw new IllegalStateException("Photo resolution failed");
        }
        return Uri.fromFile(new File(path));
    }

    private static String getPhotoFilePath(Uri takenPhotoUri,
            ContentResolver cr) {
        Cursor cursor = cr.query(takenPhotoUri, PROJECTION, null, null,
                null);
        String res = null;
        if (cursor != null) {
            int dataIdx = cursor
                    .getColumnIndex(MediaStore.MediaColumns.DATA);
            if (dataIdx >= 0 && cursor.moveToFirst())
                res = cursor.getString(dataIdx);
            cursor.close();
        }
        return res;
    }
}

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