Android期末考试复习资料.doc

1.登录跳转 Button btn; EditText name; EditText password; OnClickListener lis; protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btn=(Button)findViewById(R.id.button1); name=(EditText)findViewById(R.id.editText1); password=(EditText)findViewById(R.id.editText2); lis=new OnClickListener() { @Override public void onClick(View arg0) { // TODO Auto-generated method stub String namestr=name.getEditableText().toString(); String pwdstr=password.getEditableText().toString(); switch(arg0.getId()) { case R.id.button1: if(namestr.equals(lk)pwdstr.equals(123456)) { //startActivity(intent); //使用SharedPreferences保存数据 SharedPreferences sf=getPreferences(Activity.MODE_PRIVATE); Editor edit=sf.edit(); edit.putString(name, namestr); edit.putString(password, pwdstr); mit();//提交当前数据 Intent intent =new Intent(MainActivity.this,SecondActivity.class); startActivity(intent); }else //使用Toast信息提示框提示成功写入数据 Toast.makeText(MainActivity.this, error, Toast.LENGTH_SHORT).show(); break; } } }; btn.setOnClickListener(lis); } 2.Menu菜单 public class MainActivity extends Activity { TextView tv; private static final int ITEM1=Menu.FIRST; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); tv=(TextView)findViewById(R.id.tv); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.main, menu); MenuItem begin=menu.getItem(0); OnMenuItemClickListener lis=new OnMenuItemClickListener() { @Override public boolean onMenuItemClick(MenuItem item) { // TODO Auto-generated method stub switch (item.getItemId()) { case R.id.begin: Intent intent=new Intent(MainActivity.this,SecondActivity.