捕获图像并将其传递给android中的另一个活动

Question

I had gone through similar answers and what i came up with is i hav tried coding my first app. Now i am running into errors.

I have an ImageView in one activity, which onclick calls a method (defined in corresponding class)

this method invokes camera , captures image and send it to another activity for display. when i try to display image in same activity where it was captured, it just works fine but when i try to pass it via intent it gives me error and erros.

here is my code Activity1 (fragment_selfin_review.xml)

    <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.ardortech.restofun.SelfinReview$PlaceholderFragment" 
android:background="@color/black"
>
    <ImageView
    android:id="@+id/click_selfie"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_below="@id/blank_space"
    android:layout_centerHorizontal="true"
    android:contentDescription="@string/click_selfie"
    android:gravity="center"
    android:src="@drawable/ic_camera"
    android:clickable="true"
    android:onClick="clickSelfie" />
</RelativeLayout>

and here is the code for java class

    package com.mysite.myapp;

    import java.io.ByteArrayOutputStream;
    import java.io.File;

    import android.app.Activity;
    import android.content.ContentResolver;
    import android.content.Intent;
    import android.graphics.Bitmap;
    import android.net.Uri;
    import android.os.Bundle;
    import android.os.Environment;
    import android.provider.MediaStore;
    import android.support.v4.app.Fragment;
    import android.support.v7.app.ActionBarActivity;
    import android.view.LayoutInflater;
    import android.view.Menu;
    import android.view.MenuItem;
    import android.view.View;
    import android.view.ViewGroup;
    import android.widget.Toast;
    public class SelfinReview extends ActionBarActivity {
    public static final int TAKE_PICTURE = 0;
    private Uri mUri;
    private Bitmap mPhoto;

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

        if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
            .add(R.id.container, new PlaceholderFragment()).commit();
        }
    }
     /**  Code for onclick Camera Image Method
     * 
     */

    public void clickSelfie(View v){

        Intent i = new Intent("android.media.action.IMAGE_CAPTURE");

        File f = new File(Environment.getExternalStorageDirectory(),  "photo.jpg");
        i.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
       mUri = Uri.fromFile(f);
      startActivityForResult(i, TAKE_PICTURE);
    }

     @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
            super.onActivityResult(requestCode, resultCode, data);


           switch (requestCode) {
           case TAKE_PICTURE:
               if (resultCode == Activity.RESULT_OK) {
             getContentResolver().notifyChange(mUri, null);
                  ContentResolver cr = getContentResolver();
                  try {
                      Intent selfiSrc = new Intent(this,SelfiEdit.class);
                      selfiSrc.putExtra("imgurl", mUri.toString());
                       startActivity(selfiSrc);

                   } catch (Exception e) {
                        Toast.makeText(this, e.getMessage(),Toast.LENGTH_SHORT).show();
                      } 

                 }
           }
    }

       /**
     * A placeholder fragment containing a simple view.
     */
    public static class PlaceholderFragment extends Fragment {

        public PlaceholderFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_selfin_review,
                    container, false);
            return rootView;
        }
    }       


     }

And in the receiving activity, here how i get my intent

    @Override
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_selfi_edit);
        if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
        .add(R.id.container, new PlaceholderFragment()).commit();
        }
    /**
     * Receiving image data from the Previous activity
     */
        ImageView previewThumbnail = (ImageView) findViewById(R.id.selfie_holder);
        String rcvimgpath=getIntent().getStringExtra("imgurl");
        previewThumbnail.setImageBitmap(BitmapFactory.decodeFile(rcvimgpath));

    }

but when i am running, i am getting this error like

06-19 08:38:25.108: D/(1112): HostConnection::get() New Host Connection established
    0xb8eae210, tid 1112
    06-19 08:38:25.238: W/EGL_emulation(1112): eglSurfaceAttrib not implemented
    06-19 08:38:25.288: D/OpenGLRenderer(1112): Enabling debug mode 0
    06-19 08:38:28.438: W/EGL_emulation(1112): eglSurfaceAttrib not implemented
    06-19 08:38:44.078: W/EGL_emulation(1112): eglSurfaceAttrib not implemented
    06-19 08:38:44.668: E/BitmapFactory(1112): Unable to decode stream:
   java.io.FileNotFoundException: /file:/storage/sdcard/photo.jpg: open failed: ENOENT (No
   such file or directory)
    06-19 08:38:44.758: D/AndroidRuntime(1112): Shutting down VM
    06-19 08:38:44.758: W/dalvikvm(1112): threadid=1: thread exiting with uncaught
    exception (group=0xb4a3fba8)
    06-19 08:38:45.018: E/AndroidRuntime(1112): FATAL EXCEPTION: main
    06-19 08:38:45.018: E/AndroidRuntime(1112): Process: com.mysite.myapp, PID: 1112
    06-19 08:38:45.018: E/AndroidRuntime(1112): java.lang.RuntimeException: Unable to start
    activity ComponentInfo{com.mysite.myapp/com.mysite.myapp.SelfiEdit}:
    java.lang.NullPointerException
    06-19 08:38:45.018: E/AndroidRuntime(1112):at
    android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195)
    06-19 08:38:45.018: E/AndroidRuntime(1112):     at
    android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
    06-19 08:38:45.018: E/AndroidRuntime(1112):     at
    android.app.ActivityThread.access$800(ActivityThread.java:135)
    06-19 08:38:45.018: E/AndroidRuntime(1112):     at
    android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
    06-19 08:38:45.018: E/AndroidRuntime(1112):     at
    android.os.Handler.dispatchMessage(Handler.java:102)
    06-19 08:38:45.018: E/AndroidRuntime(1112):     at
    android.os.Looper.loop(Looper.java:136)
    06-19 08:38:45.018: E/AndroidRuntime(1112):     at
    android.app.ActivityThread.main(ActivityThread.java:5017)
    06-19 08:38:45.018: E/AndroidRuntime(1112):     at
    java.lang.reflect.Method.invokeNative(Native Method)
    06-19 08:38:45.018: E/AndroidRuntime(1112):     at
    java.lang.reflect.Method.invoke(Method.java:515)
    06-19 08:38:45.018: E/AndroidRuntime(1112):     at
    com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
    06-19 08:38:45.018: E/AndroidRuntime(1112):     at
    com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
    06-19 08:38:45.018: E/AndroidRuntime(1112):     at
    dalvik.system.NativeStart.main(Native Method)
    06-19 08:38:45.018: E/AndroidRuntime(1112): Caused by: java.lang.NullPointerException
    06-19 08:38:45.018: E/AndroidRuntime(1112):     at
    com.mysite.myapp.SelfiEdit.onCreate(SelfiEdit.java:47)
    06-19 08:38:45.018: E/AndroidRuntime(1112):     at
    android.app.Activity.performCreate(Activity.java:5231)
    06-19 08:38:45.018: E/AndroidRuntime(1112):     at
    android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
    06-19 08:38:45.018: E/AndroidRuntime(1112):     at
    android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)

i tried displaying image in the same activity where it was captured, and that worked like a charm. But its giving error when passing image url to another activity.

can anybody point me what is going wrong?? Thanks

Answer 1

Change the clickSelfie method like this

public void clickSelfie() {  
  Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
    startActivityForResult(cameraIntent, TAKE_PICTURE); 
}

onactivityResult like this

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == TAKE_PICTURE && resultCode == RESULT_OK) {  
        Uri u = data.getData();
        Intent selfiSrc = new Intent(this, SelfiEdit.class);
    selfiSrc.putExtra("imgurl", u);
    startActivity(selfiSrc);
    } 

}

And the receiving activities oncreate like this

Bundle extras= getIntent().getExtras();
if(extras!=null)
{
   path = (Uri) extras.get("imgurl");
}
ImageView img = (ImageView)findViewById(R.id.click_selfie);
 img.setImageURI(path);

It works like a charm in my device

this can help you more for wide number of devices