Android应用数据交互-优快云博客

本文链接：https://blog.youkuaiyun.com/Wandering_sea/article/details/102653949

@[toc] 作业

APP1

添加数据进数据库

package com.example.weekexam3_exe;

import android.Manifest;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.provider.ContactsContract;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;


import java.text.SimpleDateFormat;
import java.util.Date;

public class MainActivity extends AppCompatActivity {
    private static final String TAG = "MainActivity";

    private Button butSend;
    private ContentResolver resolver;
    private Uri uri, uri1;
    private int flag = 0;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        butSend = (Button) findViewById(R.id.but_send);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            requestPermissions(new String[]{Manifest.permission.READ_CONTACTS}, 100);
        }
        resolver = getContentResolver();
        uri = ContactsContract.CommonDataKinds.Phone.CONTENT_URI;
        uri1 = Uri.parse("content://com.one.one");

        butSend.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Cursor cursor = resolver.query(uri, null, null, null, null, null);
                if (cursor != null) {
                    while (cursor.moveToNext()) {
                        String name = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
                        String number = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));

                        Log.i(TAG, "onClick: " + name + "+" + number);

                        SimpleDateFormat format = new SimpleDateFormat("yyyy年MM月dd日");
                        Date date = new Date(System.currentTimeMillis());
                        String format1 = format.format(date);
//                        Log.d(TAG, "onClick: 1");
//                        Users users = new Users();
//                        users.setName(name);
//                        users.setNumber(number);
//                        users.setTime(format1);
                        Cursor query = resolver.query(uri1, null, null, null, null);

                        if (query != null ) {
                            while (true) {
                                if (query.moveToNext() && flag == 1) {
                                    String name1 = query.getString(query.getColumnIndex("name"));
                                    String number1 = query.getString(query.getColumnIndex("number"));
                                    String time1 = query.getString(query.getColumnIndex("time"));
                                    if (name1.equals(name) && number1.equals(number)) {
                                        Toast.makeText(MainActivity.this, "已存在", Toast.LENGTH_SHORT).show();
                                        break;
                                    } else if (name1.equals(name) || number1.equals(number)) {
                                        Toast.makeText(MainActivity.this, "已存在", Toast.LENGTH_SHORT).show();
                                        break;
                                    }else {
                                        Log.d(TAG, "onClick: 添加一次");
                                        ContentValues values = new ContentValues();
                                        values.put("name", name);
                                        values.put("number", number);
                                        values.put("time", format1);
                                        resolver.insert(uri1, values);
                                        break;
                                    }
                                } else {

                                    if (flag == 0) {
                                        flag++;
                                        Log.d(TAG, "onClick: 执行一次");
                                        ContentValues values = new ContentValues();
                                        values.put("name", name);
                                        values.put("number", number);
                                        values.put("time", format1);
                                        resolver.insert(uri1, values);
                                        break;
                                    }else {
                                        flag++;
                                    }
                                    break;
                                }
                            }
                        }
                    }
                }
            }
        });
    }

}

APP2

fragment

package com.example.app2.fragment;


import android.content.ContentResolver;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;

import com.example.app2.R;

import java.util.ArrayList;
import java.util.List;

/**
 * A simple {@link Fragment} subclass.
 */
public class Main_Fragment extends Fragment {

    private  ContentResolver resolver;
    private  Uri uri;
    public static List<Users> lists = new ArrayList<>();

    public Main_Fragment() {
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View inflate = inflater.inflate(R.layout.fragment_main_, container, false);
        Button button = inflate.findViewById(R.id.fm_but);

       uri = Uri.parse("content://com.one.one");

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
               resolver = getActivity().getContentResolver();
                Cursor cursor = resolver.query(uri, null, null, null, null);

                lists.clear();
                if(cursor != null){
                    while (cursor.moveToNext()){
                        String id = cursor.getString(cursor.getColumnIndex("id"));
                        String name = cursor.getString(cursor.getColumnIndex("name"));
                        String number = cursor.getString(cursor.getColumnIndex("number"));
                        String time = cursor.getString(cursor.getColumnIndex("time"));
                        Users users = new Users();
                        users.setId(id);
                        users.setName(name);
                        users.setNumber(number);
                        users.setTime(time);
                        lists.add(users);
                    }
                    cursor.close();
                    Log.i("TAG", "onClick: "+lists);
                }
            }
        });

        return inflate;
    }

}

联系人的fragment

package com.example.app2.fragment;


import android.content.ContentResolver;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.TextView;
import android.widget.Toast;

import com.example.app2.R;

import static com.example.app2.fragment.Main_Fragment.lists;

/**
 * A simple {@link Fragment} subclass.
 */
public class Persom_Fragment extends Fragment {
    private ListView listView001;
    private MyAdapter adapter;
    private Uri uri;


    public Persom_Fragment() {
        // Required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View inflate = inflater.inflate(R.layout.fragment_persom_, container, false);
        listView001 = (ListView) inflate.findViewById(R.id.list_view001);
        adapter = new MyAdapter(lists, getContext());
        listView001.setAdapter(adapter);

        listView001.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
            @Override
            public boolean onItemLongClick(AdapterView<?> parent, View view, final int position, long id) {
                final PopupWindow window = new PopupWindow(getActivity());
                View view_window = LayoutInflater.from(getContext()).inflate(R.layout.layout_window, null);

                TextView textView_del = view_window.findViewById(R.id.del);
//                TextView textView_can = view_window.findViewById(R.id.Cancel);

                uri = Uri.parse("content://com.one.one");

                textView_del.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        ContentResolver resolver = getActivity().getContentResolver();

                        Log.i("TAG", "onClick: " + 123);
                        String num = String.valueOf(position);

                        int delete = resolver.delete(uri, "id = ?", new String[]{num});

                        adapter.notifyDataSetChanged();
                        Log.i("TAG", "onClick: " + delete);


                        Toast.makeText(getContext(), "123456", Toast.LENGTH_SHORT).show();

                        window.dismiss();
                    }
                });

                window.setContentView(view_window);
                window.setHeight(ViewGroup.LayoutParams.WRAP_CONTENT);
                window.setWidth(500);
                window.setOutsideTouchable(true);

                window.showAsDropDown(view, 0, 0);


                return false;
            }
        });
        return inflate;
    }

}

适配器

package com.example.app2.fragment;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import com.example.app2.R;

import java.util.List;

public class MyAdapter extends BaseAdapter {

    private List<Users> lists;
    private Context context;

    public MyAdapter(List<Users> lists, Context context) {
        this.lists = lists;
        this.context = context;
    }

    @Override
    public int getCount() {
        return lists.size();
    }

    @Override
    public Object getItem(int position) {
        return lists.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder = null;
        if(convertView == null){
            holder = new ViewHolder();
            convertView = LayoutInflater.from(context).inflate(R.layout.layout_item01,null);
            holder.textView_id = convertView.findViewById(R.id.id_per);
            holder.textView_name = convertView.findViewById(R.id.name_per);
            holder.textView_number = convertView.findViewById(R.id.number_per);
            holder.textView_time = convertView.findViewById(R.id.time_per);
            convertView.setTag(holder);
        }else {
            holder = (ViewHolder) convertView.getTag();
        }

        holder.textView_id.setText(lists.get(position).getId());
        holder.textView_name.setText(lists.get(position).getName());
        holder.textView_number.setText(lists.get(position).getNumber());
        holder.textView_time.setText(lists.get(position).getTime());

        return convertView;
    }

    private class ViewHolder {
        private TextView textView_id,textView_name,textView_number,textView_time;

    }
}

activity

package com.example.app2;

import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.LinearLayout;
import android.widget.RadioButton;
import android.widget.RadioGroup;

import com.example.app2.fragment.Main_Fragment;
import com.example.app2.fragment.Persom_Fragment;

public class MainActivity extends AppCompatActivity {

    private LinearLayout linear;
    private RadioGroup radioG;
    private RadioButton menu;
    private RadioButton person;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        linear = (LinearLayout) findViewById(R.id.linear);
        radioG = (RadioGroup) findViewById(R.id.radio_G);
        menu = (RadioButton) findViewById(R.id.menu);
        person = (RadioButton) findViewById(R.id.person);

        FragmentManager manager = getSupportFragmentManager();
        final FragmentTransaction transaction = manager.beginTransaction();
        final Main_Fragment mainFragment = new Main_Fragment();
        final Persom_Fragment persomFragment = new Persom_Fragment();
        transaction.add(R.id.linear, mainFragment);
        transaction.add(R.id.linear, persomFragment);
        transaction.hide(persomFragment);
        transaction.commit();

        radioG.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                switch (checkedId) {
                    case R.id.menu:
                        FragmentManager manager1 = getSupportFragmentManager();
                        FragmentTransaction transaction1 = manager1.beginTransaction();
                        transaction1.show(mainFragment);
                        transaction1.hide(persomFragment);
                        transaction1.commit();
                        break;
                    case R.id.person:
                        FragmentManager manager2 = getSupportFragmentManager();
                        FragmentTransaction transaction2 = manager2.beginTransaction();
                        transaction2.show(persomFragment);
                        transaction2.hide(mainFragment);
                        transaction2.commit();
                        break;
                }
            }
        });

    }
}