这是实验室管理系统的客户端，适用于Android系统。.zip

package andios.org.activity; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.graphics.Bitmap; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.provider.MediaStore; import android.support.annotation.Nullable; import android.support.v7.app.AlertDialog; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.EditText; import android.widget.Spinner; import android.widget.TextView; import android.widget.Toast; import com.android.volley.AuthFailureError; import com.android.volley.Request; import com.android.volley.Response; import com.android.volley.VolleyError; import com.android.volley.toolbox.StringRequest; import com.google.gson.Gson; import com.google.gson.reflect.TypeToken; import java.io.File; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import andios.org.R; import andios.org.bean.UserBean; import andios.org.tool.IntentTools; import andios.org.tool.PictureUtil; import andios.org.tool.ProgressDialogUtil; import andios.org.custom_view.CircleImageView; import andios.org.tool.Constance; import andios.org.appplection.MyApplication; import andios.org.tool.SharedHelper; import static andios.org.tool.Constance.picture_path; import static andios.org.tool.Constance.user_id; public class LoginActivity extends AppCompatActivity implements View.OnClickListener ,CompoundButton.OnCheckedChangeListener,AdapterView.OnItemSelectedListener { private EditText user_name; private EditText password; private Button login; private TextView forget_password; private CheckBox checkBox1,checkBox2; private SharedHelper sharedHelper; private Context context; private Spinner spinner; private List<String> list; private ArrayAdapter adapter; private CircleImageView circleImageView; private PictureUtil pictureUtil; private List<UserBean> userBeanList; private Gson gson; private static final int PHOTO_REQUEST_CAREMA = 1;// 拍照 private static final int PHOTO_REQUEST_GALLERY = 2;// 从相册中选择 private static final int PHOTO_REQUEST_CUT = 3;// 结果 /** 首先默认个文件保存路径 */ private static final String SAVE_REAL_PATH = Environment.getExternalStorageDirectory().getAbsolutePath()+"/good/savePic";//保存的确切位置 private static final String PHOTO_FILE_NAME = "temp_photo.jpg"; private File tempFile; private AlertDialog.Builder builder; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { getSupportActionBar().hide(); super.onCreate(savedInstanceState); setContentView(R.layout.activity_login); init(); } /** * 初始化控件 */ private void init(){ initData(); pictureUtil=new PictureUtil(); user_name=findViewById(R.id.user_name); password=findViewById(R.id.password); login=findViewById(R.id.login); checkBox1=findViewById(R.id.remember); checkBox2=findViewById(R.id.self_login); forget_password=findViewById(R.id.login_forget_password); spinner = findViewById(R.id.user_id); circleImageView=findViewById(R.id.u_logo); adapter=new ArrayAdapter<>(this,android.R.layout.simple_spinner_item,list); adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); spinner.setAdapter(adapter); context=getApplicationContext(); sharedHelper=new SharedHelper(context); login.setOnClickListener(this); forget_password.setOnClickListener(this); checkBox1.setOnCheckedChangeListener(this); checkBox2.setOnCheckedChangeListener(this); circleImageView.setOnClickListener(this); } private void initData(){ list=new ArrayList<>(); list.add("请选择登录者身份"); list.add("管理员"); list.add("教师"); list.add("学生"); } /** * 设置监听事件 * @param v */ @Override public void onClick(View v) { switch (v.getId()){ case R.id.login: String url= Constance.url+"servlet/LoginServlet?"; String u_username = user_name.getText().toString(); String u_password = password.getText().toString(); String u_id=String.valueOf(spinner.getSelectedItemPosition()); if(u_id.equals("0")){ Toast.makeText(this, "请选择用户身份！", Toast.LENGTH_SHORT).show(); break; } if (checkBox2.isChecked()){ sharedHelper.save(u_id,u_username,u_password,picture_path); setU_index(u_username,u_password); } login(url,u_id,u_username,u_password); break; case R.id.login_forget_password: IntentTools.getInstance().intent(LoginActivity.this,ForgetActivity.class,null); break; case R.id.u_logo: createDialog(); break; } } private void login(String url,final String userId,final String userName, final String password){ ProgressDialogUtil.showProgressDialog(LoginActivity.this,"登录中请稍后..."); StringRequest request=new StringRequest(Request.Method.POST, url, new Response.Listener<String>() { @Override public void onResponse(String s) { if (s.equals("200")){ ProgressDialogUtil.dismiss(); Intent intent=new Intent(LoginActivity.this,MainActivity.class); startActivity(intent); LoginActivity.this.finish(); }else if(s.equals("404")) { ProgressDialogUtil.dismiss(); Toast.makeText(LoginActivity.this,"用户名或密码输入错误",Toast.LENGTH_SHORT).show(); } } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError volleyError) { ProgressDialogUtil.dismiss(); Toast.makeText(LoginActivity.this,"网络连接超时，请检查您的网络设置！",Toast.LENGTH_SHORT).show(); } }){ @Override protected Map<String, String> getParams() throws AuthFailureError { Map map=new HashMap(); map.put("user_id",userId); map.put("user_name",userName); map.put("password",password); return map; } }; request.setTag("LoginActivity"); MyApplication.getHttpQueues().add(request); } @Override protected void onStart() { super.onStart(); Map<String,String> data=sharedHelper.read(); user_name.setText(data.get("username")); password.setText(data.get("password"));//如果没有设置密码，值为“”，不为null。 if (!data.get("username").equals("")){ spinner.setSelection(Integer.parseInt(data.get("user_id")),true); checkBox1.setChecked(true); checkBox2.setChecked(true); } if (!data.get("picture_path").equals("")){ circleImageView.setImageBitmap(pictureUtil.getLocalBitmap(data.get("picture_path"))); } } @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { String u_username = user_name.getText().toString(); String p_password = password.getText().toString(); switch (buttonView.getId()){ case R.id.r