JAVA通讯录管理系统设计与实现

package com.example.lovem.addressbook; import android.content.DialogInterface; import android.content.Intent; import android.database.Cursor; import android.database.sqlite.SQLiteDatabase; import android.provider.ContactsContract; import android.support.annotation.Nullable; import android.support.v7.app.ActionBar; import android.support.v7.app.AlertDialog; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.view.Window; import android.view.WindowManager; import android.widget.AdapterView; import android.widget.ListView; import android.widget.SimpleCursorAdapter; import android.widget.TextView; public class main_interface_Activity extends AppCompatActivity { private ListView listView; private TextView name; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.activity_main_interface_); ActionBar actionBar=getSupportActionBar(); if (actionBar!=null){ actionBar.hide(); } this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); listView = (ListView) findViewById(R.id.tv_interface_listView); getRelationFromDB(); } private void getRelationFromDB() { final DatabaseHelper dbHelper = new DatabaseHelper(this); final Cursor cursor = dbHelper.query(); final String[] from = { "name", "tel", "groupName"}; int[] to = { R.id.name, R.id.tel, R.id.group}; SimpleCursorAdapter scadapter = new SimpleCursorAdapter(getApplicationContext(), R.layout.relationlist, cursor, from, to); listView.setAdapter(scadapter); listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) { final long temp=id; AlertDialog.Builder adBuilder=new AlertDialog.Builder(main_interface_Activity.this); adBuilder.setMessage("确认要删除记录吗？").setPositiveButton("确认", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { dbHelper.del((int)temp); Cursor cursor=dbHelper.query(); String[] from={"name","tel","groupName"}; int[] to={R.id.name,R.id.tel,R.id.group}; SimpleCursorAdapter scadapter=new SimpleCursorAdapter(getApplicationContext(),R.layout.relationlist,cursor,from,to); main_interface_Activity.this.listView.setAdapter(scadapter); } }).setNegativeButton("取消", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { } }); AlertDialog alertDialog=adBuilder.create(); alertDialog.show(); } }); dbHelper.close(); } public void add(View view){ Intent intent=new Intent(main_interface_Activity.this,AddRelationActivity.class); startActivityForResult(intent,0x111); } @Override protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode==0x111&&requestCode==0x111){ getRelationFromDB(); } } }