java.lang.RuntimeException: Unable to instantiate activity ComponentInfo

Question

I was trying to run a sample code While launching the application in the android 1.5 emulator , I got these errors.... Any one have some hint..?

ERROR from LogCat:<

Answer 1

I recently encountered this with fresh re-install of Eclipse. Turns out my Compiler compliance level was set to Java 1.7 and project required 1.6.

In Eclipse: Project -> Properties -> Java Compiler -> JDK Compliance

Answer 2

Right click on project > properties > android > and try with different version of the android earlier i was doing with android 4.4 then i changed to android 4.3 and it worked !

Answer 3

I had the same issue (Unable to instantiate Activity) :

FIRST reason :

I was accessing

Camera mCamera;
Camera.Parameters params = mCamera.getParameters();

before

mCamera = Camera.open();

So right way of doing is, open the camera first and then access parameters.

SECOND reason : Declare your activity in the manifest file

<activity android:name=".activities.MainActivity"/>

THIRD reason : Declare Camera permission in your manifest file.

<uses-feature android:name="android.hardware.Camera"></uses-feature>
<uses-permission android:name="android.permission.CAMERA" />

Hope this helps

Answer 4

Simply Clean your working project or restart eclipse. Then run your project. it will work.

Answer 5

You may be trying to find the view before onCreate() which is incorrect.

public class MainActivity extends Activity {

  ImageView mainImage = (ImageView) findViewById(R.id.imageViewMain); //incorrect

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

Answer 6

It is a problem of your Intent.

Please add your Activity in your AndroidManifest.xml.

When you want to make a new activity, you should register it in your AndroidManifest.xml.