我是菜鸟，所以我找到了解决这个问题的方法，我得到了答案。我使用下面的代码实现了一个正常工作的登录系统，但我刚开始收到此错误sendUserActionEvent（）mView == null，我无法再次登录。
public class Activity_Login extends Activity implements OnClickListener {
ImageView img_login,img_register;
EditText edit_email,edit_password;
ConnectiveCheckingActivity con;
Utils util;
List<UserProfile_List> ulist;
int n=0;
CheckBox check_remember;
TextView text_forgot;
Button btn_f1,btn_f2;
int reminder=0;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_login);
con = new ConnectiveCheckingActivity(Activity_Login.this);
util = new Utils(Activity_Login.this);
edit_email = (EditText)findViewById(R.id.edit_email);
edit_password = (EditText)findViewById(R.id.edit_password);
btn_f1 = (Button)findViewById(R.id.front_arrow);
btn_f2 = (Button)findViewById(R.id.front_arrow1);
edit_password = (EditText)findViewById(R.id.edit_password);
text_forgot = (TextView)findViewById(R.id.lbl_forgot);
check_remember = (CheckBox)findViewById(R.id.check_remember);
int remember=util.LoadPrefInt(Utils.REMEMBER_ME);
if(remember==1)
{
check_remember.setChecked(true);
edit_email.setText(util.LoadPref(Utils.USER_EMAIL));
edit_password.setText(util.LoadPref(Utils.USER_PASSWORD));
}
else
{
check_remember.setChecked(false);
edit_email.setText("");
edit_password.setText("");
}
check_remember.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (((CheckBox) v).isChecked()) {
util.SavePrefInt("rememberme",1);
}
else
{
util.SavePrefInt("rememberme",0);
}
}
});
img_login=(ImageView)findViewById(R.id.img_login);
img_register=(ImageView)findViewById(R.id.img_register);
img_login.setOnClickListener(this);
img_register.setOnClickListener(this);
text_forgot.setOnClickListener(this);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.img_login:
if(edit_email.getText().toString().length() == 0)
{
edit_email.setError( "Email is required!" );
}
else if(edit_password.getText().toString().length() == 0)
{
edit_password.setError( "Password is required!" );
}
else
{
String email=edit_email.getText().toString();
String password=edit_password.getText().toString();
if(con.getConnection())
{
Login(email,password);
}
else{
con.showalert();
}
}
break;
case R.id.lbl_forgot:
Intent i1=new Intent(Activity_Login.this,Activity_ForgotPassword.class);
startActivity(i1);
break;
case R.id.img_register:
Intent i=new Intent(Activity_Login.this,Activity_Register.class);
startActivity(i);
break;
case R.id.front_arrow:
edit_email.clearFocus();
edit_password.requestFocus();
break;
case R.id.front_arrow1:
edit_email.clearFocus();
edit_password.clearFocus();
img_login.requestFocus();
break;
default:
break;
}
}
public void Login(final String email,final String password) {
DialogUtils.showDialog(DialogUtils.DialogType.PROGRESS_DIALOG,
Activity_Login.this, getString(R.string.loading));
OkHttpClient client = new OkHttpClient();
RequestBody formBody = new FormEncodingBuilder()
.add("username", email)
.add("password", password)
.build();
Request request = new Request.Builder()
.get()
.url(getString(R.string.api))
.post(formBody).build();
client.newCall(request).enqueue(new Callback() {
@Override
public void onResponse(final Response response) throws IOException {
DialogUtils.dismissDialog(
DialogUtils.DialogType.PROGRESS_DIALOG, Activity_Login.this);
final String result = response.body().string().trim();
LogUtils.i("onSuccess result "+ result);
try {
if (result != null) {
n=1;
}
} catch (JsonSyntaxException e) {
e.printStackTrace();
}
runOnUiThread(new Runnable() {
public void run() {
if(n==1)
{
Log.i("username",edit_email.getText().toString());
Log.i("password",edit_password.getText().toString());
util.SavePref("useremail", email);
util.SavePref("userpassword", password);
if(result.contains("Error please enter a username or password"))
{
util.ShowToast("Error please enter a username or password");
}
else if(result.contains("Error Invalid username or password"))
{
util.ShowToast("Error Invalid username or password");
}
else
{
String resultdata =result.substring(9, result.length()-1);
try {
String userid = null;
String rid=null,zid=null,user_img=null,pcf=null,cmid=null,cmname=null,cid=null,firstname=null,lastname=null,title=null;
Gson gson = new Gson();
ulist = Arrays.asList(gson.fromJson(resultdata,
UserProfile_List[].class));
if (ulist.size() > 0) {
for (int i = 0; i < ulist.size(); i++) {
userid=ulist.get(i).id;
rid=ulist.get(i).rid;
zid=ulist.get(i).zid;
cid=ulist.get(i).cid;
user_img=ulist.get(i).img_mid;
pcf=ulist.get(i).pcf;
cmid=ulist.get(i).cmid;
cmname=ulist.get(i).cmname;
firstname=ulist.get(i).firstname;
lastname=ulist.get(i).lastname;
title=ulist.get(i).title;
}
LogUtils.i("userid"+userid);
LogUtils.i("rid"+rid);
LogUtils.i("zid"+zid);
util.SavePref("userimage", user_img);
util.SavePref("userid", userid);
util.SavePref("firstname", firstname);
util.SavePref("lastname", lastname);
util.SavePref("title", title);
util.SavePref("userid", userid);
util.LoadPref(Utils.USER_ID);
util.SavePref("rid", rid);
util.SavePref("zid", zid);
util.SavePref("cid", cid);
util.SavePref("pcf", pcf);
util.LoadPref(Utils.PCF);
util.SavePref("cmid", cmid);
util.LoadPref(Utils.CM_ID);
util.SavePref("cmname", cmname);
util.LoadPref(Utils.CM_NAME);
util.SavePref("useremail", email);
util.SavePref("userpassword", password);
String user_id = util.LoadPref(Utils.USER_ID);
Intent i=new Intent(Activity_Login.this,Activity_Home.class);
i.putExtra("tabpage", "1");
startActivity(i);
finish();
}
} catch (JsonSyntaxException e) {
}
}
}}
});
}
@Override
public void onFailure(Request arg0, IOException arg1) {
DialogUtils.dismissDialog(
DialogUtils.DialogType.PROGRESS_DIALOG, Activity_Login.this);
}
});
}
}
05-02 11：20：52.500 4397-4397 / com.soultracker D /活动：performCreate调用secproduct feature valuefalse
05-02 11：20：52.500 4397-4397 / com.soultracker D / Activity：performCreate调试弹性值truetrue
05-02 11：20：52.545 4397-4520 / com.soultracker D / OpenGLRenderer：渲染所请求的脏区：true
05-02 11：20：52.550 4397-4397 / com.soultracker D / Atlas：验证地图...... 05-02 11：20：52.615 4397-4520 / com.soultracker I / OpenGLRenderer：初始化的EGL，版本1.4
05-02 11：20：52.630 4397-4520 / com.soultracker I / OpenGLRenderer：为上下文启用了HWUI保护，＆amp; this = 0xaed09128，＆amp; mEglDisplay = 1，＆amp; mEglConfig = -1361804364
05-02 11：20：52.655 4397-4520 / com.soultracker D / OpenGLRenderer：启用调试模式0 05-02 11：20：52.940 4397-4397 / com.soultracker I /时间表：时间表：
Activity_idle id：android.os.BinderProxy@165b7f42 time：42856202 05-02 11：21：00.160 4397-4397 / com.soultracker D / ViewRootImpl：ViewPostImeInputStage ACTION_DOWN 05-02 11：21：16.540 4397-4397 / com.soultracker D / ViewRootImpl：ViewPostImeInputStage ACTION_DOWN 05-02 11：21：21.290 4397-4397 / com.soultracker D / ViewRootImpl：ViewPostImeInputStage ACTION_DOWN 05-02 11：21：21.440 4397-4397 / com.soultracker D / AbsListView：获取MotionRecognitionManager 05-02 11：21：25.740 4397-4397 / com.soultracker E / ViewRootImpl：sendUserActionEvent（）mView == null