Android Hacks

                                Android Tips

Access the attributes use in XML by :

EditText ed_1 = findViewById(R.id.ed_1);

Add Click property to the attributes by:

btn_sum.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View view) {
//Casting to Integer:
        int num1=Integer.parseInt(ed_1.getText().toString());
        int num2=Integer.parseInt(ed_2.getText().toString());
        int sum=num1+num2;
//Casting to String:
        String Result=String.valueOf(sum);
//Set Text :
        txt_result.setText(Result);
    }
});
Intent Practice:
next_btn.setOnClickListener(new View.OnClickListener() {
     @Override
     public void onClick(View view) {
         Intent next =new Intent( MainActivity.this, MainActivity2.class);
//or
         Intent next =new Intent( getApplicationContext, MainActivity2.class);

         startActivity(next);
         finish();

     }
 });
To Hide the Action Bar:
getSupportActionBar().hide();
Write A Toast Message:
Toast.makeText(MainActivity.this, "Hii Dear", Toast.LENGTH_SHORT).show();
Send Data from one file using putExtra and receive data from 2nd file using getIntent || getStringExtra :
a.putExtra("FirstName",FirstName);
a=getIntent().getStringExtra("FirstName");
txt1.setText(a);
Splash Screen Code:
new Handler().postDelayed(new Runnable() {
    @Override
    public void run() {
        Intent i =new Intent(getApplicationContext(),MainActivity2.class);
        startActivity(i);
        finish();
    }
},5000);
Android ShortCut Key 
(to arrange code )
        alt + ctrl + L
Code for Delete button:
btndelete.(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        String s=input.getText().toString();
        s=s.substring(0,s.length()-1)setOnClickListener;
        input.setText(s);
    }
});