CODEWITHSUNDEEP
javaandroid
brian
brian

Reputation: 6912

Press back button to another activity

I try the code below to call another activity while pressing the back button:

@Override
public boolean onKeyUp(int keyCode, KeyEvent msg) {
   switch(keyCode) {
       case(KeyEvent.KEYCODE_BACK):
       Intent intent = new Intent(AActivity.this, BActivity.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);  
       Window w = NASGroup.group.getLocalActivityManager().startActivity("BActivity", intent);  
       View view = w.getDecorView();  
       MyGroup.group.setContentView(view);  
       return true; 
   }
   return false;
}

But when I press the back button, it get out of the app. I see the logcat, it does not run the function onKeyUp and doesn't output any message. The same code in onKeyUp, I try to below code to a button in layout and it works.

cancel.setOnClickListener(new OnClickListener() {
   @Override
   public void onClick(View v) {
      Intent intent = new Intent(AActivity.this, BActivity.class).addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);  
      Window w = NASGroup.group.getLocalActivityManager().startActivity("BActivity", intent);  
      View view = w.getDecorView();  
      MyGroup.group.setContentView(view);  
   }
});

How can I modify it?

Upvotes: 4

Views: 14982

Answers (5)

user1213202
user1213202

Reputation: 1305

Try like this...

    @Override
    public void onBackPressed() {
    Intent BackpressedIntent = new Intent();
    BackpressedIntent .setClass(getApplicationContext(),TargetActivity.class);
    BackpressedIntent .setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
    startActivity(BackpressedIntent );
    finish();
}

Upvotes: 2

Sadeshkumar Periyasamy
Sadeshkumar Periyasamy

Reputation: 4908

If you are within Activity you can use onBackPressed which is a built-in method to handle back key press.

Upvotes: 1

Rakshi
Rakshi

Reputation: 6856

To handle back press you have to override Onbackpress method.

@Override
public void onBackPressed() {

    finish();
    Intent intent = new Intent(Myactivity.this, other.class);
    startActivity(intent);
}

Upvotes: 18

deepa
deepa

Reputation: 2494

For back button you have to override the OnBackPressed() in your activity as 

   @Override
  public void onBackPressed() {
        Intent intent=new Intent(currentclass.this,nextActivity.class);
        startActivity(intent);
        finish();


}

if you didnt finish the previous activity then no need to use intent and startActivity just call finish(); in the onBackPressed it will finish the current activity and previous activity will started.

Upvotes: 1

Talihawk
Talihawk

Reputation: 1339

Try overriding the activity's onBackPressed() method

from the docs : onBackPressed

Upvotes: 2

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