1 package com.example.administrator.library1; 2 3 import android.content.Intent; 4 import android.support.v7.app.AppCompatActivity; 5 import android.os.Bundle; 6 import android.view.Menu; 7 import android.view.MenuItem; 8 import android.view.View; 9 import android.widget.Button; 10 import android.widget.Toast; 11 12 import org.litepal.LitePal; 13 /*------ 14 郭志---18年暑假 15 */ 16 17 public class MainActivity extends AppCompatActivity { 18 19 private Button button_introduce,button_information,button_ranking,button_newBooks,button_register_student,button_blacklist; 20 @Override 21 public boolean onCreateOptionsMenu(Menu menu) { 22 getMenuInflater().inflate(R.menu.main,menu); 23 return true; 24 } 25 26 @Override 27 public boolean onOptionsItemSelected(MenuItem item) { 28 switch (item.getItemId()) 29 { 30 case R.id.student_id: 31 Intent intent_student=new Intent(MainActivity.this,Login_student.class); 32 startActivity(intent_student); 33 break; 34 /*case R.id.teacher_id: 35 Intent intent_teacher=new Intent(MainActivity.this,Login_teacher.class); 36 startActivity(intent_teacher); 37 break;*/ 38 case R.id.staff_id: 39 Intent intent_staff=new Intent(MainActivity.this,Login_staff.class); 40 startActivity(intent_staff); 41 break; 42 } 43 return true; 44 } 45 46 @Override 47 protected void onCreate(Bundle savedInstanceState) { 48 super.onCreate(savedInstanceState); 49 setContentView(R.layout.activity_main); 50 button_introduce=findViewById(R.id.introduce_id); 51 button_register_student=findViewById(R.id.registerStudent_id); 52 button_blacklist=findViewById(R.id.blacklist_id); 53 button_information=findViewById(R.id.news_id); 54 button_ranking=findViewById(R.id.ranking_id); 55 button_newBooks=findViewById(R.id.newBook_id); 56 57 button_introduce.setOnClickListener(new View.OnClickListener() { 58 @Override 59 public void onClick(View view) { 60 Intent intent=new Intent(MainActivity.this,Introduction.class); 61 startActivity(intent); 62 finish(); 63 } 64 }); 65 button_register_student.setOnClickListener(new View.OnClickListener() { 66 @Override 67 public void onClick(View view) { 68 Intent intent=new Intent(MainActivity.this,Register_student.class); 69 startActivity(intent); 70 finish(); 71 } 72 }); 73 button_blacklist.setOnClickListener(new View.OnClickListener() { 74 @Override 75 public void onClick(View view) { 76 Intent intent=new Intent(MainActivity.this,Blacklist.class); 77 startActivity(intent); 78 finish(); 79 } 80 }); 81 button_information.setOnClickListener(new View.OnClickListener() { 82 @Override 83 public void onClick(View view) { 84 Intent intent=new Intent(MainActivity.this,News.class); 85 startActivity(intent); 86 finish(); 87 } 88 }); 89 button_ranking.setOnClickListener(new View.OnClickListener() { 90 @Override 91 public void onClick(View view) { 92 Intent intent=new Intent(MainActivity.this,Ranking.class); 93 startActivity(intent); 94 finish(); 95 } 96 }); 97 button_newBooks.setOnClickListener(new View.OnClickListener() { 98 @Override 99 public void onClick(View view) { 100 Intent intent=new Intent(MainActivity.this,New_Books.class); 101 startActivity(intent); 102 finish(); 103 } 104 }); 105 106 } 107 }