How to call a method of one class from another class - android

Question

I already searched on this but couldnt find the answer as I dont know in which side I am doing wrong. Whenever I class this method I got the error from where I am calling.

I am calling from this method in checkpass.java class

 private void checking() {
    okbtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {


            TestClass testClass = new TestClass();
            testClass.testing();

        }
    });
}

I am calling this method which is located in another class

public void testing(){
    Toast.makeText(TestClass.this, "Testing class", Toast.LENGTH_SHORT).show();
}

I am getting this error:

at android.widget.Toast.makeText(Toast.java:287)
at com.futureappspk.WeTextFree.TestClass.testing(TestClass.java:18)
at com.futureappspk.WeTextFree.CheckPass$1.onClick(CheckPass.java:43)
at android.view.View.performClick(View.java:4746)

You didn't include your error. – shmosel Feb 23 '16 at 07:02 — shmosel, Feb 23 '16 at 07:02

score 6 · Accepted Answer · answered Feb 23 '16 at 07:00

6

testClass is not Activity so you failed here TestClass.this.

Better to pass context to testing(Context mContext){ and used it

public void testing(Context mContext){
Toast.makeText(mContext, "Testing class", Toast.LENGTH_SHORT).show();
}

and call from anywhere

testClass.testing(yourActivity.this);

answered Feb 23 '16 at 07:00

M D

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its very helpful and actually its working ,i ignored a big error , thnks alot u made my day – robinHood013 Feb 23 '16 at 07:09
@M D will you help me if i extended my question ? – robinHood013 Feb 23 '16 at 08:04
@ArslanAliAwan Please asked another question. Damn help you. – M D Feb 23 '16 at 08:56
@M D http://stackoverflow.com/questions/35572179/how-to-call-one-method-from-another-class-in-android?noredirect=1#comment58832539_35572179 please come on this – robinHood013 Feb 23 '16 at 09:05
@M D basically am doing this task which i mentioned u in above link, help me man if it is easy4 u . thnks in advance – robinHood013 Feb 23 '16 at 09:06

score 0 · Answer 2 · answered Feb 23 '16 at 07:04

Since you need the Context to be able to Toast, you would want to pass your Context to this other class, either when you are calling testing, or when you are initializing the Testing() object. Your context, if in an activity can be obtained by calling getApplicationContext(). Simply passing [ACTIVITY_NAME].this would also work.

** passing to function ** [I find this preferable]

otherActivityObject.testing(thisActivity.this);

** at init **

OtherActivity otherActivityObject = new OtherActivity(thisActivity.this); otherActivityObject.testing();

How to call a method of one class from another class - android

2 Answers2