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   源码介绍

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实验是做一个个人通讯录，实现有一个登陆界面，可修改登陆密码，实现手机通讯录的基本功能，包括添加手机联系人，查询手机联系人，删除手机联系人，导入联系人，以及拨打电话、发送短信、发送邮件等功能。以java语言为主体，xml布局，结合Android移动开发平台等实现对安卓手机通讯录的基本操作，做到能够完好的运行。

package cn.edu.wtu.sj.mycontact.activity; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.database.ContentObserver; import android.database.Cursor; import android.os.Handler; import android.support.v7.app.AlertDialog; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.ContextMenu; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.CursorAdapter; import android.widget.EditText; import android.widget.ListView; import android.widget.TextView; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import cn.edu.wtu.sj.mycontact.R; import cn.edu.wtu.sj.mycontact.provider.ContactProvider; import cn.edu.wtu.sj.mycontact.utils.ThreadUtils; import cn.edu.wtu.sj.mycontact.utils.ToastUtils; public class MainActivity extends AppCompatActivity { private CursorAdapter mCursorAdapter; private ListView mMainLv; private MyContentObserver mMyContentObserver=new MyContentObserver(new Handler()); private Cursor mcurrentCursor;
    @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mMainLv=findViewById(R.id.mainLv);
        initData();
        initListener();
    } private void initListener() {
        registerContentObserver();
        registerForContextMenu(mMainLv);
        mMainLv.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
            @Override public boolean onItemLongClick(AdapterView<?> adapterView, View view, int i, long l) {
                mcurrentCursor= (Cursor) adapterView.getItemAtPosition(i); return false;// false 表示这个事件继续向外传播，这样才能让ContextMenu显示出来  }
        });
    }
    @Override protected void onDestroy() { super.onDestroy();
        unRegistContentObserver();
    } private void initData() {
        setOrUpdateAdapter();
    } private void setOrUpdateAdapter() {
        ThreadUtils.runInUIThread(new Runnable() {
            @Override public void run() { if(mCursorAdapter!=null){
                    mCursorAdapter.getCursor().requery(); return;
                }
                Cursor cursor=getContentResolver().query(ContactProvider.URI_CONTACT,null,null,null,null); if (cursor.getCount()==0){ return;
                }
                mCursorAdapter=new CursorAdapter(MainActivity.this,cursor,true) {
                    @Override public View newView(Context context, Cursor cursor, ViewGroup viewGroup) {
                        View view=View.inflate(context, R.layout.data_list,null); return view;
                    }
                    @Override public void bindView(View view, Context context, Cursor cursor) {
                        TextView nameTv=view.findViewById(R.id.nameTv_datalist);
                        TextView phoneTv=view.findViewById(R.id.phoneTv_datalist);
                        TextView emailTv=view.findViewById(R.id.emailTv_datalist);
                        TextView qqTv=view.findViewById(R.id.qqTv_datalist);
                        nameTv.setText(cursor.getString(1));
                        phoneTv.setText(cursor.getString(2));
                        emailTv.setText(cursor.getString(3));
                        qqTv.setText(cursor.getString(4));
                    }
                };
                mMainLv.setAdapter(mCursorAdapter);
            }
        });
    }

    @Override public boolean onCreateOptionsMenu(Menu menu) {
        menu.add(1,Menu.FIRST,1,"新建联系人").setIcon(R.drawable.new_contact);
        menu.add(1,Menu.FIRST 1,2,"查找联系人").setIcon(R.drawable.search_contact);
        menu.add(1,Menu.FIRST 2,3,"导入联系人").setIcon(R.drawable.import_contact);
        menu.add(1,Menu.FIRST 3,4,"导出联系人").setIcon(R.drawable.export_contact);
        menu.add(1,Menu.FIRST 4,4,"修改密码").setIcon(R.drawable.modify_password); return super.onCreateOptionsMenu(menu);
    }
    @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()){ case Menu.FIRST:addContact();break; case Menu.FIRST 1:searchContact();break; case Menu.FIRST 2:importContact();break;
        } return super.onOptionsItemSelected(item);
    } private void importContact() {
        Intent intent=new Intent(MainActivity.this,ImportContactActivity.class);
        startActivity(intent);
    } private void searchContact() { final EditText inputNameTv=new EditText(MainActivity.this);
        AlertDialog.Builder inputDialog=new AlertDialog.Builder(MainActivity.this);
        inputDialog.setTitle("请输入要查找的姓名")
                .setView(inputNameTv)
                .setPositiveButton("查找", new DialogInterface.OnClickListener() {
                    @Override public void onClick(DialogInterface dialogInterface, int i) {
                        searchResultShow(inputNameTv.getText().toString().trim());
                    }
                }).show();
    } private void searchResultShow(final String name) {
        ThreadUtils.runInUIThread(new Runnable() {
            @Override public void run() {
                Cursor cursor=getContentResolver().query(ContactProvider.URI_CONTACT, null, "name like ?", new String[]{"%" name "%"}, null); if (cursor.getCount()==0){
                    ToastUtils.showToastSafe(MainActivity.this,"没有找到该联系人！"); return;
                }
                CursorAdapter searchAdapter=new CursorAdapter(MainActivity.this,cursor,true) {
                    @Override public View newView(Context context, Cursor cursor, ViewGroup viewGroup) {
                        View view=View.inflate(context, R.layout.data_list,null); return view;
                    }
                    @Override public void bindView(View view, Context context, Cursor cursor) {
                        TextView nameTv=view.findViewById(R.id.nameTv_datalist);
                        TextView phoneTv=view.findViewById(R.id.phoneTv_datalist);
                        TextView emailTv=view.findViewById(R.id.emailTv_datalist);
                        TextView qqTv=view.findViewById(R.id.qqTv_datalist);
                        nameTv.setText(cursor.getString(1));
                        phoneTv.setText(cursor.getString(2));
                        emailTv.setText(cursor.getString(3));
                        qqTv.setText(cursor.getString(4));
                    }
                };
                mMainLv.setAdapter(searchAdapter);
            }
        });
    }
    @Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) { super.onCreateContextMenu(menu, v, menuInfo);
        menu.setHeaderTitle("联系人操作");
        menu.add(Menu.NONE,Menu.FIRST,1,"编辑联系人");
        menu.add(Menu.NONE,Menu.FIRST 1,2,"删除联系人");
        menu.add(Menu.NONE,Menu.FIRST 2,3,"拨打电话");
        menu.add(Menu.NONE,Menu.FIRST 3,4,"发送短信");
        menu.add(Menu.NONE,Menu.FIRST 4,5,"发送邮件");
        menu.add(Menu.NONE,Menu.FIRST 5,6,"显示全部");
    }
    @Override public boolean onContextItemSelected(MenuItem item) { switch (item.getItemId()){ case Menu.FIRST:editContact();break; case Menu.FIRST 1:delContact();break; case Menu.FIRST 2:dial();break; case Menu.FIRST 3:sms();break; case Menu.FIRST 4:email();break; case Menu.FIRST 5:mMainLv.setAdapter(mCursorAdapter);setOrUpdateAdapter();break;
        } return super.onContextItemSelected(item);
    } private void editContact() {
         Intent intent=new Intent(MainActivity.this,EditContactActivity.class);
         intent.putExtra("name",mcurrentCursor.getString(1));
         intent.putExtra("phone",mcurrentCursor.getString(2));
         intent.putExtra("email",mcurrentCursor.getString(3));
         intent.putExtra("qq",mcurrentCursor.getString(4));
         startActivity(intent);
    } private void delContact() {
        getContentResolver().delete(ContactProvider.URI_CONTACT, "name=?", new String[]{mcurrentCursor.getString(1)});
        ToastUtils.showToastSafe(this,"该联系人已删除！");
    } private void dial() {
    } private void sms() {
    } private void email() {
    } private void addContact() {
        Intent intent=new Intent(MainActivity.this,AddContactActivity.class);
        startActivity(intent);
    }
    @Override public boolean onMenuOpened(int featureId, Menu menu) { if (menu!=null){ if (menu.getClass().getSimpleName().equalsIgnoreCase("MenuBuilder")){ try {
                    Method method=menu.getClass().getDeclaredMethod("setOptionalIconsVisible",Boolean.TYPE);
                    method.setAccessible(true);
                    method.invoke(menu,true);
                } catch (NoSuchMethodException e) {
                    e.printStackTrace();
                } catch (IllegalAccessException e) {
                    e.printStackTrace();
                } catch (InvocationTargetException e) {
                    e.printStackTrace();
                }
            }
        } return super.onMenuOpened(featureId, menu);
    } class MyContentObserver extends ContentObserver{ public MyContentObserver(Handler handler) { super(handler);
        }
        @Override public void onChange(boolean selfChange) { super.onChange(selfChange);
             setOrUpdateAdapter();
        }
    } private void registerContentObserver(){
        getContentResolver().registerContentObserver(ContactProvider.URI_CONTACT, true,
                mMyContentObserver);
    } private void unRegistContentObserver(){
        getContentResolver().unregisterContentObserver(mMyContentObserver);
    }
}