安卓联系人管理

【实例简介】

手机联系人管理

【实例截图】

【核心代码】

package com.choxx.contactmanager;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;

import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.ActionBar;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Intent;
import android.graphics.Color;
import android.view.Menu;
import android.view.View;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

@SuppressLint("NewApi")
public class Login extends Activity {

EditText getPass;
File sd;
TextView forgot;

@TargetApi(Build.VERSION_CODES.HONEYCOMB)
@Override
protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
ActionBar actionBar = getActionBar();
actionBar.setIcon(android.R.drawable.sym_action_chat);

getPass=(EditText) findViewById(R.id.getPass);
forgot=(TextView) findViewById(R.id.forgot);
forgot.setTextColor(Color.BLUE);
forgot.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
// TODO Auto-generated method stub

Intent i=new Intent(Login.this,ResetPassword.class);
startActivity(i);
finish();

}
});
sd=Environment.getExternalStorageDirectory();
}

public void check(View v)
{
String tmp,pass;
tmp=getPass.getText().toString();
try {
FileInputStream fis=new FileInputStream(sd "/Contact Manager/.abcd");
int a=0;
pass="";
while((a=fis.read())>-1)
{
pass =(char)a;
}
if(pass.equals(tmp))
{
Intent i=new Intent(this,AfterRegActivity.class);
startActivity(i);
finish();
}
else
{
AlertDialog.Builder b=new AlertDialog.Builder(this);
b.setTitle("ERROR");
b.setMessage("Invalid Password!!! Try again..");
b.show();
// TODO: handle exception

}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}
public void exit(View v)
{

finish();
}

}