Button to go back to MainActivity

问题:

I want to create a button that would lead the user straight back to main activity which doesn't have the android name="com.example.example".
It has android.intent.etc...
How can I reference my button to go back to this activity?

回答1:

Lets say your main activity is called Main.java.

btnBack.setOnClickListener(new OnClickListener(){

  private void onClick(){
    Intent intent = new Intent(currentActivity.this, Main.class);
    intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);   
    startActivity(intent);
  }
});

回答2:

use startActivity(intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));

回答3:

Sometimes you can just call activity.finish() to end current activity, so the main (first created) activity will pop out.

If this is not your case, do this:

Intent intent = new Intent(getApplicationContext(), Main.class);
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)             
startActivity(intent);

回答4:

Intent intent = new Intent(this, Main.class);
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(intent);

回答5:

Well from wherever you are just call startActivity() with the required parameters inside the buttons onClick method. That's it.

回答6:

public void onBackPressed(){
    finish();
}