团队冲刺04

今天解决了ListView不显示数据的问题，终于弄清楚了这个逻辑，原来根本没有把新建的信息存入数据库，把onActivityResult写在了fragment里。

  遇到的问题：现在添加之后不能时时刷新ListView，尝试在Adapter中写了一个刷新的函数，调用时一直空指针错误。adapter.notifyDataSetChanged()不执行；

  明天解决这一问题。

import android.app.Activity;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.text.TextUtils;
import android.util.DisplayMetrics;
import android.util.Log;
import android.util.SparseArray;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.EditText;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.RadioGroup;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import android.widget.Toolbar;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentTransaction;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import static android.view.View.GONE;
public class MainActivity extends AppCompatActivity implements View.OnClickListener{
private FrameLayout fragment_container;
private FragmentManager manager;
private FragmentTransaction transaction;
private Bundle mBundle;
private Toolbar myToolbar;
final String TAG = "tag";
private Context context = this;
private List<Note> noteList = new ArrayList<Note>();
private NoteAdapter adapter;
private PopupWindow popupWindow; // 左侧弹出菜单
private PopupWindow popupCover; // 菜单蒙版
private LayoutInflater layoutInflater;
private RelativeLayout main;
private ViewGroup customView;
private ViewGroup coverView;
private WindowManager wm;
private DisplayMetrics metrics;
private TagAdapter tagAdapter;
private TextView setting_text;
private ImageView setting_image;
private ListView lv_tag;
private TextView add_tag;
private ShowFragment showFragment;
private CycleFragment cycleFragment;
private SettingFragment settingFragment;
private MyFragment myFragment;
private ImageView add;
private int mode;
private int tag;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(getContentViewResource());
initView();
initData();
initList();
add = findViewById(R.id.sign_iv);
add.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(MainActivity.this,EditActivity.class);
intent.putExtra("mode",4);  //新建笔记的mode设为4
startActivityForResult(intent,0);
}
});
//将主页添加到第一个fragment中，即默认fragment
ShowFm = new ShowFragment();
getSupportFragmentManager().beginTransaction().add(R.id.fragment_container, ShowFm).commit();
//取得用户id值
/*Intent intent = getIntent();
mIdKey = intent.getIntExtra("idKey", 0);*/
Intent intent = getIntent();
mode = intent.getIntExtra("mode",0);
}
@Override
public void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
Log.d(TAG, "onActivityResult: panduan");
int returnMode;  //-1不改变 0创建一个新笔记 1修改当前笔记
long note_id;/*
Bundle bundle = data.getExtras();
returnMode = bundle.getInt("mode",0);*/
returnMode = data.getExtras().getInt("mode",-1);
note_id = data.getExtras().getLong("id",0);
//修改笔记
if(returnMode == 1){
String content = data.getStringExtra("content");
String time = data.getStringExtra("time");
int tag = data.getExtras().getInt("tag",1);
Note newNote = new Note(content,time,tag);
newNote.setId(note_id);
dao op = new dao(this);
op.open();
op.updateNote(newNote);
op.close();
//refreshListView();
}
//新建笔记
else if (returnMode == 0) {
Log.d(TAG, "onActivityResult: xinjianbiji");
String content = data.getExtras().getString("content");
String time = data.getExtras().getString("time");
int tag = data.getExtras().getInt("tag", 1);
Note newNote = new Note(content, time, tag);
dao op = new dao(this);
op.open();
Log.d(TAG, "onActivityResult: tianjiadhujukujinqu");
op.addNote(newNote);
op.close();
//adapter.reflesh(noteList);
//refreshListView();
}
//删除笔记
else if (returnMode == 2){
Note delNote = new Note();
delNote.setId(note_id);
dao op = new dao(this);
op.open();
op.removeNote(delNote);
op.close();
}
//refreshListView();
super.onActivityResult(requestCode, resultCode, data);
}
//private FrameLayout fragment_container;
private RadioGroup rg;
private Fragment ShowFm = null,CycleFm = null, SettingFm = null, MyFm = null;
@Override
public void onClick(View v) {
}
private final class RadioGroupOnCheckedChangeListener implements RadioGroup.OnCheckedChangeListener {
@Override
public void onCheckedChanged(RadioGroup radioGroup, int checkedId) {
if (ShowFm != null) {
getSupportFragmentManager().beginTransaction().hide(ShowFm).commit();
}
if (CycleFm != null) {
getSupportFragmentManager().beginTransaction().hide(CycleFm).commit();
}
if (SettingFm != null) {
getSupportFragmentManager().beginTransaction().hide(SettingFm).commit();
}
if (MyFm != null) {
getSupportFragmentManager().beginTransaction().hide(MyFm).commit();
}
switch (checkedId) {
case R.id.record_tab:
if (ShowFm == null) {
ShowFm = new ShowFragment();
getSupportFragmentManager().beginTransaction().add(R.id.fragment_container, ShowFm).commit();
} else {
getSupportFragmentManager().beginTransaction().show(ShowFm).commit();
}
break;
case R.id.cycle_tab:
if (CycleFm == null) {
CycleFm = new CycleFragment();
getSupportFragmentManager().beginTransaction().add(R.id.fragment_container, CycleFm).commit();
} else {
getSupportFragmentManager().beginTransaction().show(CycleFm).commit();
}
break;
case R.id.settings_tab:
if (SettingFm == null) {
SettingFm = new SettingFragment();
getSupportFragmentManager().beginTransaction().add(R.id.fragment_container, SettingFm).commit();
} else {
getSupportFragmentManager().beginTransaction().show(SettingFm).commit();
}
break;
case R.id.my_tab:
if (MyFm == null) {
MyFm = new MyFragment();
getSupportFragmentManager().beginTransaction().add(R.id.fragment_container, MyFm).commit();
} else {
getSupportFragmentManager().beginTransaction().show(MyFm).commit();
}
break;
}
}
}
public int getContentViewResource() {
return R.layout.activity_main;
}
private SparseArray<Fragment> mFragmentSparseArray;
protected void initView() {
fragment_container = findViewById(R.id.fragment_container);
rg = findViewById(R.id.tabs_rg);
}
protected void initData() {
}
protected void initList() {
rg.setOnCheckedChangeListener(new RadioGroupOnCheckedChangeListener());
rg.check(R.id.record_tab);
}
}

package com.example.jishibenceshi;
import android.app.Activity;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Color;
import android.graphics.drawable.ColorDrawable;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.text.TextUtils;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.PopupWindow;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.widget.SearchView;
import androidx.appcompat.widget.Toolbar;
import androidx.fragment.app.Fragment;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import static android.view.View.GONE;
import static androidx.core.os.LocaleListCompat.create;
public class ShowFragment extends Fragment {
/*public ShowFragment(String context){
this.context = context;
}*/
private SharedPreferences deleteAll_confirm;
private Passworddao mPwdDataManager;
public static final String ARGUMENT = "argument";
private String mArgument;
final String TAG = "tag";
//private Context context = this;
private NoteDatabase dbHelper;
//FloatingActionButton btn_add;
private ListView lv_note;
private NoteAdapter adapter;
private List<Note> noteList = new ArrayList<Note>();
private Toolbar myToolbar;
private PopupWindow popupWindow; // 左侧弹出菜单
private PopupWindow popupCover; // 菜单蒙版
private LayoutInflater layoutInflater;
private RelativeLayout main;
private ViewGroup customView;
private ViewGroup coverView;
private WindowManager wm;
private DisplayMetrics metrics;
private TagAdapter tagAdapter;
private TextView setting_text;
private ImageView setting_image;
private ListView lv_tag;
private TextView add_tag;
/*public ShowFragment() {
}*/
@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_show, container, false);
lv_note = (ListView) view.findViewById(R.id.lv_note);
myToolbar = view.findViewById(R.id.Toolbar_main);
((AppCompatActivity) getActivity()).setSupportActionBar(myToolbar);
setHasOptionsMenu(true);
//setSupportActionBar(myToolbar);
//getSupportActionBar().setHomeButtonEnabled(true);
//getSupportActionBar().setDisplayHomeAsUpEnabled(true);  //用自定义的工具栏代替本身的活动栏
Bundle bundle = getArguments();
if (bundle != null)
mArgument = bundle.getString(ARGUMENT);
lv_note.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
switch (parent.getId()) {
case R.id.lv_note:
Note curNote = (Note) parent.getItemAtPosition(position);
Intent intent = new Intent(getActivity(), EditActivity.class);
intent.putExtra("content", curNote.getContent());
intent.putExtra("id", curNote.getId());
intent.putExtra("time", curNote.getTime());
intent.putExtra("mode", 3);     // MODE of 'click to edit'  修改笔记的mode设为3
intent.putExtra("tag", curNote.getTag());
startActivityForResult(intent, 1);      //collect data from edit
Log.d(TAG, "onItemClick: " + position);
break;
}
}
});
//初始化adapter
adapter = new NoteAdapter(this.getActivity(), noteList);
lv_note.setAdapter(adapter);
refreshListView();
//return inflater.inflate(R.layout.fragment_show, container, false);
return view;
}
public static ShowFragment newInstance(String argument) {
Bundle bundle = new Bundle();
bundle.putString(ARGUMENT, argument);
ShowFragment contentFragment = new ShowFragment();
contentFragment.setArguments(bundle);
return contentFragment;
}
@Override
public void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
Log.d(TAG, "onActivityResult: shujukutianru");
int returnMode;  //-1不改变 0创建一个新笔记 1修改当前笔记
long note_id;
Bundle bundle = data.getExtras();
returnMode = bundle.getInt("mode", 0);
//returnMode = data.getExtras().getInt("mode",-1);
note_id = data.getExtras().getLong("id", 0);
//修改笔记
if (returnMode == 1) {
String content = data.getStringExtra("content");
String time = data.getStringExtra("time");
int tag = data.getExtras().getInt("tag", 1);
Note newNote = new Note(content, time, tag);
newNote.setId(note_id);
dao op = new dao(getContext().getApplicationContext());
op.open();
op.updateNote(newNote);
op.close();
//refreshListView();
}
//新建笔记
else if (returnMode == 0) {
Log.d(TAG, "onActivityResult: xinjianbiji");
String content = data.getExtras().getString("content");
String time = data.getExtras().getString("time");
int tag = data.getExtras().getInt("tag", 1);
Note newNote = new Note(content, time, tag);
dao op = new dao(getContext().getApplicationContext());
op.open();
Log.d(TAG, "onActivityResult: tianjiadhujukujinqu");
op.addNote(newNote);
op.close();
}
//删除笔记
else if (returnMode == 2) {
Note delNote = new Note();
delNote.setId(note_id);
dao op = new dao(getContext().getApplicationContext());
op.open();
op.removeNote(delNote);
op.close();
}
refreshListView();
super.onActivityResult(requestCode, resultCode, data);
}
//导航栏上的图标
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
/*getMenuInflater().inflate(R.menu.main_menu,menu);
return super.onCreateOptionsMenu(menu);*/
Log.e(TAG, "onCreateOptionsMenu()");
menu.clear();
inflater.inflate(R.menu.main_menu, menu);
MenuItem mSearch = menu.findItem(R.id.action_search);
SearchView mSearchView = (SearchView) mSearch.getActionView();
mSearchView.setQueryHint("Search");
mSearchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
adapter.getFilter().filter(newText);
return false;
}
});
super.onCreateOptionsMenu(menu, inflater);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_clear:
/*new AlertDialog.Builder(this.getActivity())
.setTitle("确认全部删除嘛？")
.setMessage("删除全部吗？")
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
Note delNote = new Note();
//delNote.setId(note_id);
dao op = new dao(getContext().getApplicationContext());
op.open();
op.removeAllNote(noteList);
op.close();
}
*//*dbHelper = new NoteDatabase(getContext());
SQLiteDatabase db = dbHelper.getWritableDatabase();
db.delete("notes", null, null);
db.execSQL("update sqlite_sequence set seq=0 where name='notes'");*//*
// refreshListView();
}).setNegativeButton(android.R.string.no, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
}).create().show();
break;*/
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setTitle("确认全部删除嘛？");
builder.setMessage("请输入密码");
View view = getLayoutInflater().inflate(R.layout.alert_password_entry, null);
final EditText et_pwd = (EditText) view.findViewById(R.id.input_pwd);
builder.setView(view);//设置login_layout为对话提示框
//设置正面按钮，并做事件处理
builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
String input_password = et_pwd.getText().toString().trim();
//SharedPreferences.Editor editor =deleteAll_confirm.edit();
Note delNote = new Note();
//delNote.setId(note_id);
dao op = new dao(getContext().getApplicationContext());
op.open();
op.removeAllNote(noteList);
op.close();
Toast.makeText(getActivity(), "删除成功", Toast.LENGTH_SHORT).show();
/*int result=mPwdDataManager.findPassword(input_password);
if(result==1) {         //返回1说明密码正确
//保存用户名和密码
//editor.putString("PASSWORD", input_password);
Note delNote = new Note();
//delNote.setId(note_id);
dao op = new dao(getContext().getApplicationContext());
op.open();
op.removeAllNote(noteList);
op.close();
Toast.makeText(getActivity(), "删除成功", Toast.LENGTH_SHORT).show();
}
else {
Toast.makeText(getActivity(), "密码不正确", Toast.LENGTH_SHORT).show();
}*/
refreshListView();
}
});
//设置反面按钮，并做事件处理
builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
Toast.makeText(getActivity(), "取消删除", Toast.LENGTH_SHORT).show();
}
});
builder.show();//显示Dialog对话框
break;
}
return super.onOptionsItemSelected(item);
}
//刷新listview
public void refreshListView() {
Log.d(TAG, "refreshListView: ");
SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this.getActivity());
dao op = new dao(this.getActivity());
op.open();
// set adapter
if (noteList.size() > 0) noteList.clear();
noteList.addAll(op.getAllNotes());
/*if (sharedPreferences.getBoolean("reverseSort", false)) sortNotes(noteList, 2);
else sortNotes(noteList, 1);*/
op.close();
adapter.notifyDataSetChanged();
}
}