how to use sqlite android studio
package com.example.sqliteoperations; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.EditText; public class MainActivity extends AppCompatActivity { EditText Name, Pass , updateold, updatenew, delete; myDbAdapter helper; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Name= (EditText) findViewById(R.id.editName); Pass= (EditText) findViewById(R.id.editPass); updateold= (EditText) findViewById(R.id.editText3); updatenew= (EditText) findViewById(R.id.editText5); delete = (EditText) findViewById(R.id.editText6); helper = new myDbAdapter(this); } public void addUser(View view) { String t1 = Name.getText().toString(); String t2 = Pass.getText().toString(); if(t1.isEmpty() || t2.isEmpty()) { Message.message(getApplicationContext(),"Enter Both Name and Password"); } else { long id = helper.insertData(t1,t2); if(id<=0) { Message.message(getApplicationContext(),"Insertion Unsuccessful"); Name.setText(""); Pass.setText(""); } else { Message.message(getApplicationContext(),"Insertion Successful"); Name.setText(""); Pass.setText(""); } } } public void viewdata(View view) { String data = helper.getData(); Message.message(this,data); } public void update( View view) { String u1 = updateold.getText().toString(); String u2 = updatenew.getText().toString(); if(u1.isEmpty() || u2.isEmpty()) { Message.message(getApplicationContext(),"Enter Data"); } else { int a= helper.updateName( u1, u2); if(a<=0) { Message.message(getApplicationContext(),"Unsuccessful"); updateold.setText(""); updatenew.setText(""); } else { Message.message(getApplicationContext(),"Updated"); updateold.setText(""); updatenew.setText(""); } } } public void delete( View view) { String uname = delete.getText().toString(); if(uname.isEmpty()) { Message.message(getApplicationContext(),"Enter Data"); } else{ int a= helper.delete(uname); if(a<=0) { Message.message(getApplicationContext(),"Unsuccessful"); delete.setText(""); } else { Message.message(this, "DELETED"); delete.setText(""); } } } }