How to fix The method startActivity(Intent) is undefined for the type new View.OnClickListener() syntax error

Question

I have a syntax errors with my code , in the "getView" I want to make a listener for the button "update" to move to another activity :

@Override
    public View getView(int position, View convertView, ViewGroup parent) {


        LayoutInflater l = (LayoutInflater) context.getSystemService(context.LAYOUT_INFLATER_SERVICE);
        View rowView = l.inflate(R.layout.temp, parent, false);
        TextView textView = (TextView) rowView.findViewById(R.id.textView1);
        ImageView imageView = (ImageView) rowView.findViewById(R.id.imageView1);
        Button update = (Button) rowView.findViewById(R.id.button1);

//      update.setOnClickListener(new View.OnClickListener() {
//          
//          @Override
//          public void onClick(View v) {
//
//                 Intent redirect = new Intent(getApplicationContext(),Update.class);
//                 startActivity(redirect);
//              
//          }
//      });




        textView.setText(sa.get(position));


        return rowView;
    }

I've tried to fix these errors about "Intent" but I failed :(

1. The method startActivity(Intent) is undefined for the type new View.OnClickListener()

2. The method getApplicationContext() is undefined for the type new View.OnClickListener()

and even whene I moved these statements from "onClick" method the problem didn't change !! I imported "Intent" library , how to solve that ????

Solution 1

If your adapter is in a different file you will need activity context.

You need to pass the activity context from your activity class to your adapter constructor.

http://developer.android.com/reference/android/content/Context.html#startActivity(android.content.Intent)

startActivity is a method of your activity class. So you need activity context to start the activity.

Also instead of getApplicationContext use activity context.

When to call activity context OR application context?

Check the answer by commonsware.

     update.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {

            Intent redirect = new Intent(context,Update.class);
            context.startActivity(redirect);    
      }
      });

Solution 2

Try

final Activity thisActivity = this;

update.setOnClickListener(new View.OnClickListener() {

          @Override
          public void onClick(View v) {

                 Intent redirect = new Intent(thisActivity,Update.class);
                 thisActivity.startActivity(redirect);

          }
      });

Solution 3

for similar problem for me just this helped me :

  @Override
  public void onClick(View v) {
                    Intent intent = new Intent(G.context, SecondActivity.class);
                    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                    G.context.startActivity(intent);
  }
  });

add context in G Class :

public class G extends Activity {

    public static Context context;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        context = getApplicationContext();

    }
}

Solution 4

You just need to call context.startActivity instead, can follow below steps

Three simple steps

1) Declare local Variable Context mCtx

2) intialize it with Activity context either by passing a parameter to constructor/method, or in the onCreate method if you are using above code in activity.

3) call mCtx.startActivity(intent);

or

you can call ActivityName.this.startActivity()

Edit:- As par dmon comment, You simply can use your local context instance

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