CODEWITHSUNDEEP
androidandroid-activity
Carlos Hernández Gil
Carlos Hernández Gil

Reputation: 1853

Is there a way to know from the end of which activity another activity is resumed

I have an Activity A that uses an intent to go to Activity B. Sometimes Activity A start also another activity, Activity C.

Is there a way for Activity A to know from which Activity (B or C) it is restarted when these activities finish?

Upvotes: 0

Views: 94

Answers (6)

techroid
techroid

Reputation: 477

From your Activity A, call following methods, suppose you have two buttons and on click of them start Activity B or Activity C:

public void StartOtherActivityB() {
        Intent aIntent = new Intent(LauncherActivity.this, OtherActivityB.class);
        startActivityForResult(aIntent, REQUEST_ACTIVITY_B);


}



public void StartOtherActivityC() {
    Intent aIntent = new Intent(LauncherActivity.this, OtherActivityC.class);
    startActivityForResult(aIntent, REQUEST_ACTIVITY_C);


}

and implement onActivityResult() method as follows

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

    if(requestCode == REQUEST_ACTIVITY_B){

        //class restarted from ACTIVITY_B

    }else if (requestCode ==REQUEST_ACTIVITY_C){

        //class restarted from ACTIVITY_C

    }
}

Upvotes: 2

Amit Vaghela
Amit Vaghela

Reputation: 22955

check out your self , you will come to know easily

public class MainActivity extends Activity {

    Button clikBtn;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Log.e("onCreate", "111111111");

        Toast.makeText(MainActivity.this,"onCreate...",Toast.LENGTH_LONG).show();
        setContentView(R.layout.activity_main);

        clikBtn = (Button)findViewById(R.id.clickBtn);

        /*clikBtn.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View view) {

            }
        });*/
    }

    public void clickButton(View v){
        Intent intent = new Intent(MainActivity.this,SecondActivity.class);
        startActivity(intent);
    }

    @Override
    protected void onStart() {
        super.onStart();
        Toast.makeText(MainActivity.this,"onStart...",Toast.LENGTH_LONG).show();
        Log.e("onStart","999999999");
    }

    @Override
    protected void onPause() {
        super.onPause();
        Toast.makeText(MainActivity.this,"onPause...",Toast.LENGTH_LONG).show();
        Log.e("onPause", "222222222");
        // notify("onPause");
    }

    @Override
    protected void onResume() {
        super.onResume();
        Toast.makeText(MainActivity.this,"onResume...",Toast.LENGTH_LONG).show();
        Log.e("onResume", "333333333");
        //notify("onResume");
    }

    @Override
    protected void onStop() {
        super.onStop();
        Toast.makeText(MainActivity.this,"onStop...",Toast.LENGTH_LONG).show();
        Log.e("onStop", "444444444");
        //notify("onStop");
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        Toast.makeText(MainActivity.this,"onDestroy...",Toast.LENGTH_LONG).show();
        Log.e("onDestroy", "55555555");
        //notify("onDestroy");
    }

    @Override
    protected void onRestart() {
        super.onRestart();
        Toast.makeText(MainActivity.this,"onRestart...",Toast.LENGTH_LONG).show();
        Log.e("onRestart","66666666");
    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);
        Toast.makeText(MainActivity.this,"onRestoreInstanceState...",Toast.LENGTH_LONG).show();
        Log.e("onRestoreInstanceState", "777777777");
        //notify("onRestoreInstanceState");
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        Toast.makeText(MainActivity.this,"onSaveInstanceState...",Toast.LENGTH_LONG).show();
        Log.e("onSaveInstanceState", "8888888888");
        //notify("onSaveInstanceState");
    }


}

Upvotes: 0

P-RAD
P-RAD

Reputation: 1341

like Juanjo Vega said, use the activitylifecycle methods to do this..... take a look at the methods.... LifecycleMethods-android

you can set up a global variable or something (as per your logic) in the onResume() method of the activity which you want to get notified. onResume() will cal after onPause which trigger your logic...

for setting up globals you can use singleTons or the Application class

Upvotes: 1

Filnik
Filnik

Reputation: 138

private boolean isB = false;

public void startActivity(Class<?> activityName){
    Intent intent = new Intent(this, activityName);
    isB = activityName.getName().equals(B.class.getName());
    startActivity(intent);
}

Upvotes: 1

Aster
Aster

Reputation: 877

You could use method startActivityForResult instead of startActivity to start your activity B or C. If B or C than returns a result that identifies itself you can read it.

Upvotes: 2

Juanjo Vega
Juanjo Vega

Reputation: 1440

Use a static variable to store the last activity started, so when activity A is resumed, you can check it.

Upvotes: 1

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