Android exemple qui utilise onResume, onStart et onRestart

package com.test;
import stuff here
public class Pick_Color extends Activity implements OnClickListener
{
private Button b11; 
private Button b12; 
private Button b13; 
private Button b14; 
private Button b_final;
private EditText RED;
private EditText GREEN;
private EditText BLUE;
static int temp_red;
static int temp_green;
static int temp_blue;
public void onCreate(Bundle savedInstanceState) 
{
super.onCreate(savedInstanceState);
setContentView(R.layout.pickcolor);
Log.d("pick color","on create");
b11=(Button)findViewById(R.id.buttonR1C1); 
b12=(Button)findViewById(R.id.buttonR1C2); 
b13=(Button)findViewById(R.id.buttonR1C3); 
b14=(Button)findViewById(R.id.buttonR1C4); 
b11.setBackgroundColor(Color.argb(255, 255, 255,0));
b12.setBackgroundColor(Color.argb(255, 255, 0,255));
b13.setBackgroundColor(Color.argb(255, 0, 255,255));
b14.setBackgroundColor(Color.argb(255, 102, 153,51));
b11.setOnClickListener(this);
b12.setOnClickListener(this);
b13.setOnClickListener(this);
b14.setOnClickListener(this);
RED=(EditText) findViewById(R.id.RED_TEXT);
GREEN=(EditText) findViewById(R.id.GREEN_TEXT);
BLUE=(EditText) findViewById(R.id.BLUE_TEXT);
RED.setText(Integer.toString(temp_red));
GREEN.setText(Integer.toString(temp_green));
BLUE.setText(Integer.toString(temp_blue));
b_final=(Button)findViewById(R.id.button_result);
b_final.setBackgroundColor(Color.argb(255,temp_red,temp_green,temp_blue));
b_final.setOnClickListener(this);
OnKeyListener text_listener= new OnKeyListener() 
{
public boolean onKey(View v, int keyCode, KeyEvent event)
{
int flag=0;
try
{
switch(v.getId())
{
case R.id.RED_TEXT:
flag=1;
temp_red=Integer.parseInt(RED.getText().toString());
if(temp_red<0 || temp_red>255)
throw new NumberFormatException();
// Log.d("Pick_Color","temp_red = "+temp_red);
break;
case R.id.GREEN_TEXT:
flag=2;
temp_green=Integer.parseInt(GREEN.getText().toString());
if(temp_green<0 || temp_green>255)
throw new NumberFormatException();
// Log.d("Pick_Color","temp_green = "+temp_green);
break;
case R.id.BLUE_TEXT:
flag=3;
temp_blue=Integer.parseInt(BLUE.getText().toString());
if(temp_blue<0 || temp_blue>255)
throw new NumberFormatException();
// Log.d("Pick_Color","temp_blue = "+temp_blue);
break;
}
}
catch(NumberFormatException n)
{
if(flag==1)
{
RED.setText("");
Log.d("Pick Color","Red Error");
}
if(flag==2)
{
GREEN.setText("");
Log.d("Pick Color","Green Error");
}
if(flag==3)
{
BLUE.setText("");
Log.d("Pick Color","Blue Error");
}
}
Log.d("Pick Color","temp_red = "+temp_red+" temp_green = "+temp_green+" temp_blue = "+temp_blue+"");
b_final.setBackgroundColor(Color.argb(255,temp_red, temp_green, temp_blue));
return false;
}
};
RED.setOnKeyListener(text_listener);
GREEN.setOnKeyListener(text_listener);
BLUE.setOnKeyListener(text_listener);
}
protected void onResume()
{
super.onResume();
RED.setText(Integer.toString(temp_red));
GREEN.setText(Integer.toString(temp_green));
BLUE.setText(Integer.toString(temp_blue));
b_final.setBackgroundColor(Color.argb(255,temp_red,temp_green,temp_blue));
}
public void onClick(View v)
{
switch (v.getId()) 
{
//--------------  FIRST ROW --------------
case R.id.buttonR1C1:
RED.setText("255");
GREEN.setText("255");
BLUE.setText("0");
temp_red=Integer.parseInt(RED.getText().toString());
temp_green=Integer.parseInt(GREEN.getText().toString());
temp_blue=Integer.parseInt(BLUE.getText().toString());
b_final.setBackgroundColor(Color.argb(255,255,255,0));
writeColor("Color 255 255 255 0");
break;
case R.id.buttonR1C2:
RED.setText("255");
GREEN.setText("0");
BLUE.setText("255");
temp_red=Integer.parseInt(RED.getText().toString());
temp_green=Integer.parseInt(GREEN.getText().toString());
temp_blue=Integer.parseInt(BLUE.getText().toString());
b_final.setBackgroundColor(Color.argb(255,255,0,255));
writeColor("Color 255 255 0 255");
break;
case R.id.buttonR1C3:
RED.setText("0");
GREEN.setText("255");
BLUE.setText("255");
temp_red=Integer.parseInt(RED.getText().toString());
temp_green=Integer.parseInt(GREEN.getText().toString());
temp_blue=Integer.parseInt(BLUE.getText().toString());
b_final.setBackgroundColor(Color.argb(255,0,255,255));
writeColor("Color 255 0 255 255");
break;
case R.id.buttonR1C4:
RED.setText("102");
GREEN.setText("153");
BLUE.setText("51");
temp_red=Integer.parseInt(RED.getText().toString());
temp_green=Integer.parseInt(GREEN.getText().toString());
temp_blue=Integer.parseInt(BLUE.getText().toString());
b_final.setBackgroundColor(Color.argb(255,102,153,51));
writeColor("Color 255 102 153 51");
break;
case R.id.button_result:
writeColor("Color 255 "+temp_red+" "+temp_green+" "+temp_blue);
finish();
break;
}
}
public void writeColor(String string) 
{
TouchList.Current_Color=string;
try 
{
TouchList.dos.writeUTF(TouchList.Current_Color);
} 
catch (IOException e) 
{
e.printStackTrace();
}
}
}

OriginalL'auteur Abhishek Susarla