Lecture 6: Development For Mobile Development PDF

Development for Mobile Lecture 6 Assoc. Prof. Mina Ibrahim activity_main2.xml  MainActivity2.java Define button b4 (id button4), button b5 (id button5), plain text t1 (id txtName), plain text t2 (id txtAddress) and text view (id resview): public class MainActivity...

Development for Mobile Lecture 6 Assoc. Prof. Mina Ibrahim activity_main2.xml  MainActivity2.java Define button b4 (id button4), button b5 (id button5), plain text t1 (id txtName), plain text t2 (id txtAddress) and text view (id resview): public class MainActivity2 extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main2); Button b4 = (Button) findViewById(R.id.button4); Button b5 = (Button) findViewById(R.id.button5); EditText t1 = (EditText) findViewById(R.id.txtName); EditText t2 = (EditText) findViewById(R.id.txtAddress); TextView Res=(TextView)findViewById(R.id.resview); b4.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { ……….. } });  MainActivity2.java onClick function to display plain text t1 for long time then disappear automatically : b4.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Toast.makeText(MainActivity2.this,t1.getText().toString(), Toast.LENGTH_LONG).show(); } });  MainActivity2.java onClick function to display plain text t1 in text view Res: b4.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Res.setText(t1.getText().toString()); } });  MainActivity2.java onClick function to add two numbers which are entered in plain text t1 and t2 then display the result in text view Res : b4.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { double num1, num2, num3; num1 = Double.parseDouble(t1.getText().toString()); num2 = Double.parseDouble(t2.getText().toString()); num3=num1+num2; Res.setText(Double.toString(num3)); } });  MainActivity2.java onClick function to subtract two numbers which are entered in plain text t1 and t2 then display the result in text view Res : b4.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { double num1, num2, num3; num1 = Double.parseDouble(t1.getText().toString()); num2 = Double.parseDouble(t2.getText().toString()); num3=num1-num2; Res.setText(Double.toString(num3)); } });  MainActivity2.java onClick function to create and display alert dialog: b4.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { AlertDialog.Builder d = new AlertDialog.Builder(MainActivity2.this); d.setTitle("hi"); d.setMessage("hello"); Title Message d.setPositiveButton("add", null); d.setNegativeButton("sub", null); d.show(); } }); Negative Positive button button  MainActivity2.java onClick function to create and display alert dialog with two functions: b4.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { AlertDialog.Builder d = new AlertDialog.Builder(MainActivity2.this); d.setTitle("hi"); d.setMessage("hello"); d.setPositiveButton("add", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { double num1, num2, num3; num1 = Double.parseDouble(t1.getText().toString()); num2 = Double.parseDouble(t2.getText().toString()); num3=num1+num2; Res.setText(Double.toString(num3)); } });  MainActivity2.java d.setNegativeButton("sub", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { double num1, num2, num3; num1 = Double.parseDouble(t1.getText().toString()); num2 = Double.parseDouble(t2.getText().toString()); num3=num1-num2; Res.setText(Double.toString(num3)); } }); d.show(); } });  MainActivity2.java onClick function to go to a web site which is entered in plain text t1: b4.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent i=new Intent(Intent.ACTION_VIEW); i.setData(Uri.parse(t1.getText().toString())); //URL of web site startActivity(i); } });  MainActivity2.java onClick function to dial a number which is entered in plain text t1: b4.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent i=new Intent(Intent.ACTION_DIAL); i.setData(Uri.parse("tel:"+t1.getText().toString())); startActivity(i); } }); ListView  activity_third.xml …… …….  ThirdActivity.java public class ThirdActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_third); ListView lView=(ListView) findViewById(R.id.listItem1); String [] s={"01200000000","01000000000","01100000000","01500000000"}; ArrayAdapter arr=new ArrayAdapter(ThirdActivity.this, android.R.layout.select_dialog_item,s); lView.setAdapter(arr); lView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView parent, View view, int position, long id) { Intent i=new Intent(Intent.ACTION_DIAL); i.setData(Uri.parse("tel:"+s[position])); startActivity(i); } }); } }