Question

I am working on a contact list project in android and i want to make a browse button to browse an image and save it in my database for every contact.And then i want to display the image on the screen.
could you give me please a good example or tutorial of how to browse images and save it/retrieve from database?

For begin i tried just to make program to browse the image but i get an error.

here is my .java:

  package ianco.test.andrei;
  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;

  public class BrowsePicture extends Activity {

//YOU CAN EDIT THIS TO WHATEVER YOU WANT
private static final int SELECT_PICTURE = 1;

private String selectedImagePath;
//ADDED
private String filemanagerstring;

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



   Button sButton = (Button) findViewById(R.id.button1);
   sButton.setOnClickListener(new OnClickListener() {

        public void onClick(View arg0) {

            // in onCreate or any event where your want the user to
            // select a file
            Intent intent = new Intent();
            intent.setType("image/*");
            intent.setAction(Intent.ACTION_GET_CONTENT);
            startActivityForResult(Intent.createChooser(intent,
                    "Select Picture"), SELECT_PICTURE);
        }
    });
}

//UPDATED
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (resultCode == RESULT_OK) {
        if (requestCode == SELECT_PICTURE) {
            Uri selectedImageUri = data.getData();

            //OI FILE Manager
            filemanagerstring = selectedImageUri.getPath();

            //MEDIA GALLERY
            selectedImagePath = getPath(selectedImageUri);

            //DEBUG PURPOSE - you can delete this if you want
            if(selectedImagePath!=null)
                System.out.println(selectedImagePath);
            else System.out.println("selectedImagePath is null");
            if(filemanagerstring!=null)
                System.out.println(filemanagerstring);
            else System.out.println("filemanagerstring is null");

            //NOW WE HAVE OUR WANTED STRING
            if(selectedImagePath!=null)
                System.out.println("selectedImagePath is the right one for you!");
            else
                System.out.println("filemanagerstring is the right one for you!");
        }
    }
}

//UPDATED!
public String getPath(Uri uri) {
    String[] projection = { MediaStore.Images.Media.DATA };
    Cursor cursor = managedQuery(uri, projection, null, null, null);
    if(cursor!=null)
    {
        //HERE YOU WILL GET A NULLPOINTER IF CURSOR IS NULL
        //THIS CAN BE, IF YOU USED OI FILE MANAGER FOR PICKING THE MEDIA
        int column_index = cursor
        .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
        cursor.moveToFirst();
        return cursor.getString(column_index);
    }
    else return null;
}

}

Error is:12-24 00:14:07.742: E/AndroidRuntime(365): FATAL EXCEPTION: main
12-24 00:14:07.742: E/AndroidRuntime(365): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{ianco.test.andrei/ianco.test.andrei.TestareActivity}: java.lang.ClassNotFoundException: ianco.test.andrei.TestareActivity in loader dalvik.system.PathClassLoader[/data/app/ianco.test.andrei-1.apk]
12-24 00:14:07.742: E/AndroidRuntime(365): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
12-24 00:14:07.742: E/AndroidRuntime(365): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
12-24 00:14:07.742: E/AndroidRuntime(365): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
12-24 00:14:07.742: E/AndroidRuntime(365): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
12-24 00:14:07.742: E/AndroidRuntime(365): at android.os.Handler.dispatchMessage(Handler.java:99)
12-24 00:14:07.742: E/AndroidRuntime(365): at android.os.Looper.loop(Looper.java:123)
12-24 00:14:07.742: E/AndroidRuntime(365): at android.app.ActivityThread.main(ActivityThread.java:4627)
12-24 00:14:07.742: E/AndroidRuntime(365): at java.lang.reflect.Method.invokeNative(Native Method)
12-24 00:14:07.742: E/AndroidRuntime(365): at java.lang.reflect.Method.invoke(Method.java:521)
12-24 00:14:07.742: E/AndroidRuntime(365): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
12-24 00:14:07.742: E/AndroidRuntime(365): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
12-24 00:14:07.742: E/AndroidRuntime(365): at dalvik.system.NativeStart.main(Native Method)
12-24 00:14:07.742: E/AndroidRuntime(365): Caused by: java.lang.ClassNotFoundException: ianco.test.andrei.TestareActivity in loader dalvik.system.PathClassLoader[/data/app/ianco.test.andrei-1.apk]
12-24 00:14:07.742: E/AndroidRuntime(365): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
12-24 00:14:07.742: E/AndroidRuntime(365): at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
12-24 00:14:07.742: E/AndroidRuntime(365): at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
12-24 00:14:07.742: E/AndroidRuntime(365): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
12-24 00:14:07.742: E/AndroidRuntime(365): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)


Answer 1

Your manifest has a reference to a TestareActivity that does not exist:

00:14:07.742: E/AndroidRuntime(365): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{ianco.test.andrei/ianco.test.andrei.TestareActivity}: java.lang.ClassNotFoundException: ianco.test.andrei.TestareActivity in loader dalvik.system.PathClassLoader[/data/app/ianco.test.andrei-1.apk]

Either fix the manifest or add the missing activity.