从android studio中的ready数据库读取
你好，我需要你的帮助 整个月我都在试图知道如何从项目中的ready数据库（sqlite.db）读取数据 。。我想建立一个数据库，并在准备之前将其填满（例如一本书） 然后，我想在文本视图或任何 我搜索了很多视频教程，但所有的视频教程都只是在制作一个内部数据库，并更新detale和delete 但我想加载一个我之前填满的外部数据库，我想在我的应用程序中使用它 请帮我怎么做 我编写了这段代码，但它只是用于内部数据库 我使用这个youtube视频教程 我添加了应用程序中没有的“请求读取外部存储”，我认为这可能是必要的 我尝试了这个视频教程，但我的应用程序崩溃了我的问题在哪里 注意：此应用程序在Edittext中插入一个名称，它将为我们提供此查询的地址 包com.sirwansoft.externaldatabase从android studio中的ready数据库读取,android,database,sqliteopenhelper,Android,Database,Sqliteopenhelper,你好，我需要你的帮助 整个月我都在试图知道如何从项目中的ready数据库（sqlite.db）读取数据 。。我想建立一个数据库，并在准备之前将其填满（例如一本书） 然后，我想在文本视图或任何 我搜索了很多视频教程，但所有的视频教程都只是在制作一个内部数据库，并更新detale和delete 但我想加载一个我之前填满的外部数据库，我想在我的应用程序中使用它 请帮我怎么做 我编写了这段代码，但它只是用于内部数据库 我使用这个youtube视频教程 我添加了应用程序中没有的“请求读取外部存储”，我认
import android.content.Context;
import android.database.sqlite.SQLiteOpenHelper;
import com.readystatesoftware.sqliteasset.SQLiteAssetHelper;
public class DatabaseOpenHelper extends SQLiteAssetHelper {
private static final String DATABASE_NAME="data";
private static final int DATABASE_VERSION=1;
//constractor
public DatabaseOpenHelper(Context context){
super(context,DATABASE_NAME,null,DATABASE_VERSION);
}
}
package com.sirwansoft.externaldatabase;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class DatabaseAcsess {
private SQLiteOpenHelper openHelper;
private SQLiteDatabase db;
private static DatabaseAcsess instance;
Cursor c =null;
//privite constractor that object creating from outside the class is avoided
private DatabaseAcsess (Context context){
this.openHelper=new DatabaseOpenHelper(context);
}
//return instance of the class
public static DatabaseAcsess getInstance(Context context){
if (instance==null){
instance=new DatabaseAcsess(context);
}return instance;
}
//to open the database
public void open(){
this.db=openHelper.getWritableDatabase();
}
//closing the database connection
public void close(){
if (db!=null){
this.db.close();
}
}
//we will query for address by passing name
public String getAddress(String name){
c=db.rawQuery("select address form Tabale Where Name = '"+name+"'",new String[]{});
StringBuffer buffer =new StringBuffer();
while (c.moveToNext()){
String address = c.getString(0);
buffer.append(""+address);
}return buffer.toString();
}
}
package com.sirwansoft.externaldatabase;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import android.Manifest;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
EditText edit_name;
Button btn_query;
TextView text_res;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
edit_name=findViewById(R.id.edit_name);
btn_query=findViewById(R.id.btn_query);
text_res=findViewById(R.id.text_res);
ActivityCompat.requestPermissions(MainActivity.this,
new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},
1);
//setOnClick to button
btn_query.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
DatabaseAcsess databaseAcsess =DatabaseAcsess.getInstance(getApplicationContext());
databaseAcsess.open();
//getting string value from address
String name = edit_name.getText().toString();
String address =databaseAcsess.getAddress(name); //we use the getAddress method to get address
//setting text to result field
text_res.setText(address);
databaseAcsess.close();
//database connection closed
//done
}
});
}
@Override
public void onRequestPermissionsResult(int requestCode,
String permissions[], int[] grantResults) {
switch (requestCode) {
case 1: {
// If request is cancelled, the result arrays are empty.
if (grantResults.length > 0
&& grantResults[0] == PackageManager.PERMISSION_GRANTED) {
// permission was granted, yay! Do the
// contacts-related task you need to do.
} else {
// permission denied, boo! Disable the
// functionality that depends on this permission.
Toast.makeText(MainActivity.this, "Permission denied to read your External storage", Toast.LENGTH_SHORT).show();
}
return;
}
// other 'case' lines to check for other
// permissions this app might request
}
}
}
10-13 01:33:21.579 22724-22724/? I/art: Not late-enabling -Xcheck:jni (already on)
10-13 01:33:21.694 22724-22724/com.sirwansoft.externaldatabase W/System: ClassLoader referenced unknown path: /data/app/com.sirwansoft.externaldatabase-1/lib/x86
10-13 01:33:21.815 22724-22724/com.sirwansoft.externaldatabase W/art: Before Android 4.1, method android.graphics.PorterDuffColorFilter androidx.vectordrawable.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
10-13 01:33:22.212 22724-22724/com.sirwansoft.externaldatabase I/art: Rejecting re-init on previously-failed class java.lang.Class<androidx.core.view.ViewCompat$2>
10-13 01:33:22.212 22724-22724/com.sirwansoft.externaldatabase I/art: Rejecting re-init on previously-failed class java.lang.Class<androidx.core.view.ViewCompat$2>
10-13 01:33:22.516 22724-22766/com.sirwansoft.externaldatabase D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true
10-13 01:33:22.687 22724-22766/com.sirwansoft.externaldatabase I/OpenGLRenderer: Initialized EGL, version 1.4
10-13 01:33:22.688 22724-22766/com.sirwansoft.externaldatabase W/OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
10-13 01:33:22.717 22724-22766/com.sirwansoft.externaldatabase D/EGL_emulation: eglCreateContext: 0xae4a4480: maj 2 min 0 rcv 2
10-13 01:33:22.721 22724-22766/com.sirwansoft.externaldatabase D/EGL_emulation: eglMakeCurrent: 0xae4a4480: ver 2 0 (tinfo 0xae492ee0)
10-13 01:33:22.785 22724-22766/com.sirwansoft.externaldatabase D/EGL_emulation: eglMakeCurrent: 0xae4a4480: ver 2 0 (tinfo 0xae492ee0)
10-13 01:33:23.293 22724-22766/com.sirwansoft.externaldatabase D/EGL_emulation: eglMakeCurrent: 0xae4a4480: ver 2 0 (tinfo 0xae492ee0)
10-13 01:33:23.299 22724-22766/com.sirwansoft.externaldatabase E/Surface: getSlotFromBufferLocked: unknown buffer: 0xaab0aa00
10-13 01:33:31.669 22724-22766/com.sirwansoft.externaldatabase D/EGL_emulation: eglMakeCurrent: 0xae4a4480: ver 2 0 (tinfo 0xae492ee0)
10-13 01:33:37.558 22724-22724/com.sirwansoft.externaldatabase W/SQLiteAssetHelper: copying database from assets...
10-13 01:33:37.558 22724-22724/com.sirwansoft.externaldatabase D/AndroidRuntime: Shutting down VM
10-13 01:33:37.559 22724-22724/com.sirwansoft.externaldatabase E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.sirwansoft.externaldatabase, PID: 22724
com.readystatesoftware.sqliteasset.SQLiteAssetHelper$SQLiteAssetException: Missing databases/data file (or .zip, .gz archive) in assets, or target folder not writable
at android.content.res.AssetManager.openAsset(Native Method)
at android.content.res.AssetManager.open(AssetManager.java:313)
at android.content.res.AssetManager.open(AssetManager.java:287)
at com.readystatesoftware.sqliteasset.SQLiteAssetHelper.copyDatabaseFromAssets(SQLiteAssetHelper.java:436)
at com.readystatesoftware.sqliteasset.SQLiteAssetHelper.createOrOpenDatabase(SQLiteAssetHelper.java:400)
at com.readystatesoftware.sqliteasset.SQLiteAssetHelper.getWritableDatabase(SQLiteAssetHelper.java:176)
at com.sirwansoft.externaldatabase.DatabaseAcsess.open(DatabaseAcsess.java:34)
at com.sirwansoft.externaldatabase.MainActivity$1.onClick(MainActivity.java:40)
at android.view.View.performClick(View.java:5198)
at android.view.View$PerformClick.run(View.java:21147)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5417)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
10-13 01:38:37.636 22724-22724/com.sirwansoft.externaldatabase I/Process: Sending signal. PID: 22724 SIG: 9
10-13 01:33:21.579 22724-22724/？I/art:未延迟启用-Xcheck:jni（已启用）
10-13 01:33:21.694 22724-22724/com.sirwansoft.externaldatabase W/System:ClassLoader引用的未知路径：/data/app/com.sirwansoft.externaldatabase-1/lib/x86
10-13 01:33:21.815 22724-22724/com.sirwansoft.externaldatabase W/art:Android 4.1之前的方法Android.graphics.PorterDuffColorFilter androidx.vectordrawable.graphics.drawable.VectorDrawableCompat.UpdatentFilter（Android.graphics.PorterDuffColorFilter，Android.content.res.ColorStateList，Android.graphics.PorterDuff$模式）将错误地重写android.graphics.drawable.drawable中的包私有方法
10-13 01:33:22.212 22724-22724/com.sirwansoft.externaldatabase I/art:拒绝对以前失败的类java.lang.class重新初始化
好，这将解释数据库的MVC模式
这是模型类
public class DatabaseModel {
private String rowid;
private String website;
private String usernane;
private String password;
private String question;
private String answer;
private String notes;
public String getRowid() {
return rowid;
}
public void setRowid(String rowid) {
this.rowid = rowid;
}
public String getWebsite() {
return website;
}
public void setWebsite(String website) {
this.website = website;
}
public String getUsernane() {
return usernane;
}
public void setUsernane(String usernane) {
this.usernane = usernane;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getQuestion() {
return question;
}
public void setQuestion(String question) {
this.question = question;
}
public String getAnswer() {
return answer;
}
public void setAnswer(String answer) {
this.answer = answer;
}
public String getNotes() {
return notes;
}
public void setNotes(String notes) {
this.notes = notes;
}
}
下面是创建表的Helper类
public class DBHelper extends SQLiteOpenHelper{
public static final String DB_NAME = THE_PATH + "PassWord.db";
public static final Integer DB_VERSION = 1;
public static final String TABLE_PW = "masterPW";
public static final String Col_IDI = "IDI";
public static final String Col_MPW = "mpw";
public static final String TABLE_INFO = "webINFO";
public static final String Col_ID = "ID";
public static final String Col_WS = "website";
public static final String Col_UN = "username";
public static final String Col_PW = "password";
public static final String Col_SQ = "question";
public static final String Col_SA = "answer";
public static final String Col_NOTES = "notes";
private static final String MAKE_TABLE_PW = "CREATE TABLE IF NOT EXISTS " + TABLE_PW +
"(" + Col_IDI + " INTEGER PRIMARY KEY," + Col_MPW + " TEXT " + ")";
private static final String MAKE_TABLE = "CREATE TABLE IF NOT EXISTS " + TABLE_INFO +
"(" + Col_ID + " INTEGER PRIMARY KEY," + Col_WS + " TEXT, " + Col_UN + " TEXT, " + Col_PW + " TEXT, " + Col_SQ + " TEXT, " + Col_SA + " TEXT, " + Col_NOTES +" TEXT "+ ")";
static SQLiteDatabase db;
public DBHelper(Context context){
super(context,DB_NAME,null,DB_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL( MAKE_TABLE_PW );
db.execSQL( MAKE_TABLE );
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS " + TABLE_PW);
db.execSQL("DROP TABLE IF EXISTS " + TABLE_INFO);
onCreate(db);
}
/*All the CODE above is the design for the Database and its Tables */
/*=================================================================*/
/* Code Below are the Helper CRUD Functions */
/*==========================================*/
public String getCol_MPW(){
db = getWritableDatabase();
String query = "SELECT * FROM " + TABLE_PW;
Cursor cursor = db.rawQuery(query,null);
if(cursor.moveToFirst()){
str = cursor.getString(cursor.getColumnIndex(Col_MPW));
}
cursor.close();
db.close();
return str;
// This routine called from MainActivity determine's if a
// password has been entered in the db table named "TABLE_PW"
// See onLoad() method in MainActivity
}
/* Update Record in Database*/
public void updateDBRow(String rowid,String website, String username, String password, String question,String answer, String notes){
db = this.getWritableDatabase();
ContentValues cv = new ContentValues();
cv.put(Col_WS,website);
cv.put(Col_UN,username);
cv.put(Col_PW,password);
cv.put(Col_SQ,question);
cv.put(Col_SA,answer);
cv.put(Col_NOTES,notes);
/*NOTE WHERE THE quotation MARKS ARE */
db.update(TABLE_INFO,cv, Col_ID + " = ?",new String[] { rowid });
db.close();
}
/* Insert into database table named "TABLE_INFO" */
public void insertIntoDB(String website, String username, String password, String question,String answer, String notes){
// 1. get reference to writable DB
db = this.getWritableDatabase();
// 2. create ContentValues to add key "column"/value
ContentValues cv = new ContentValues();
cv.put(Col_WS,website);
cv.put(Col_UN,username);
cv.put(Col_PW,password);
cv.put(Col_SQ,question);
cv.put(Col_SA,answer);
cv.put(Col_NOTES,notes);
// 3. insert
db.insert(TABLE_INFO, null, cv);
// 4. close
db.close();
}
/* Retrieve ALL data from database table named "TABLE_INFO" */
public List<DatabaseModel> getDataFromDB(){
List<DatabaseModel> dbList = new ArrayList<>();
String query = "SELECT * FROM " + TABLE_INFO;
db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(query,null);
if (cursor.moveToFirst()){
do {
DatabaseModel model = new DatabaseModel();
model.setRowid(cursor.getString(0));
model.setWebsite(cursor.getString(1));
model.setUsernane(cursor.getString(2));
model.setPassword(cursor.getString(3));
model.setQuestion(cursor.getString(4));
model.setAnswer(cursor.getString(5));
model.setNotes(cursor.getString(6));
dbList.add(model);
}while (cursor.moveToNext());
}
db.close();
cursor.close();
return dbList;
}
/* Delete a record from database table named "TABLE_INFO" */
/* based on the selected records id in Col_ID*/
public void deleteDBRow(String rowid){
db = this.getWritableDatabase();
db.delete(TABLE_INFO, Col_ID + " = ?", new String[] { rowid });
db.close();
}
public类DBHelper扩展了SQLiteOpenHelper{
公共静态最终字符串DB_NAME=_路径+“PassWord.DB”；
公共静态最终整数DB_VERSION=1；
公共静态最终字符串表_PW=“masterPW”；
公共静态最终字符串Col_IDI=“IDI”；
公共静态最终字符串Col\u MPW=“MPW”；
公共静态最终字符串表\u INFO=“webINFO”；
公共静态最终字符串Col_ID=“ID”；
公共静态最终字符串Col_WS=“网站”；
公共静态最终字符串Col_UN=“username”；
公共静态最终字符串Col_PW=“password”；
公共静态最终字符串Col_SQ=“问题”；
公共静态最终字符串Col_SA=“answer”；
公共静态最终字符串Col_NOTES=“NOTES”；
私有静态最终字符串MAKE_TABLE_PW=“不存在时创建表”+表+
（“+Col_IDI+”整数主键“+Col_MPW+”文本“+”）；
私有静态最终字符串MAKE_TABLE=“如果不存在创建表”+表信息+
“（“+Col_ID+”整数主键，“+Col_WS+”文本，“+Col_UN+”文本，“+Col_PW+”文本，“+Col_SQ+”文本，“+Col_SA+”文本，“+Col_注释+”文本”+”）；
静态数据库数据库；
公共DBHelper（上下文）{
super（上下文，数据库名称，空，数据库版本）；
}
@凌驾
public void onCreate（SQLiteDatabase db）{
db.execSQL（MAKE_TABLE_PW）；
db.execSQL（生成表）；
}
@凌驾
public void onUpgrade（SQLiteDatabase db，int-oldVersion，int-newVersion）{
db.execSQL（“如果存在删除表”+表_PW）；
db.execSQL（“如果存在删除表”+表信息）；
onCreate（db）；
}
/*以上所有代码都是数据库及其表的设计*/
/*=================================================================*/
/*下面的代码是Helper CRUD函数*/
/*==========================================*/
公共字符串getCol_MPW（）{
db=getWritableDatabase（）；
String query=“SELECT*FROM”+表\u PW；
Cursor Cursor=db.rawQuery（查询，空）；
if（cursor.moveToFirst（））{
str=cursor.getString（cursor.getColumnIndex（Col_MPW））；
}
cursor.close（）；
db.close（）；
返回str；
//从MainActivity调用的此例程确定
//已在名为“table_PW”的数据库表中输入密码
//请参见MainActivity中的onLoad（）方法
}
/*更新数据库中的记录*/
public void updateDBRow（字符串rowid、字符串网站、字符串用户名、字符串密码、字符串问题、字符串答案、字符串注释）{
db=this.getWritableDatabase（）；
ContentValues cv=新的ContentValues（）；
简历（简历、网站）；
简历（姓名、用户名）；
简历输入（Col_PW，密码）；
简历（简历，问题）；
简历（Col_SA，答案）；
cv.put（Col_注释，注释）；
/*注意引号的位置*/
更新（表信息，cv，列ID+“=？”，新字符串[]{rowid}）；
db.close（）；
}
/*插入名为“table_INFO”的数据库表*/
public void insertIntoDB（字符串网站、字符串用户名、字符串密码、字符串问题、字符串答案、字符串注释）{
//1.获取对可写数据库的引用
db=this.getWritableDatabase（）；
//2.创建ContentValues以添加键“column”/value
ContentValues cv=新的ContentValues（）；
简历（简历、网站）；
简历（姓名、用户名）；
简历输入（Col_PW，密码）；
简历（简历，问题）；
简历（Col_SA，答案）；
cv.put（Col_注释，注释）；
//3.插入
db.insert（表格信息，空，cv）；
//4.关闭
db.close（）；
}
/*从名为“table_INFO”的数据库表中检索所有数据*/
公共列表getDataFromDB（）{
List dbList=new ArrayList（）；
String query=“SELECT*FROM”+表格信息；
db=this.getWritableDatabase（）；
Cursor Cursor=db.rawQuery（查询，空）；
if（cursor.moveToFirst（））{
做{
DatabaseModel model=新的DatabaseModel（）；
model.setRowid（cursor.getString（0））；
model.setWebsite（cursor.getString（1））；
model.setUsernane（cursor.getString（2））；
public class DetailsActivity extends AppCompatActivity {
TextView tvDA;
String tORf;
int position;
String str;
Button btnSave, btnDelete, btnUpdate;
EditText etWebSite, etUN, etPW, etSecQuestion, etSecAnswer, etNotes;
ImageView imageTB;
private DBHelper helper;
private SQLiteDatabase db;
private Context context = this;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_details);
Intent intentSP = getIntent();
Bundle bundle = intentSP.getExtras();
tORf = bundle.getString("FROM_LIST_ACTIVITY");
Intent intentN = getIntent();
Bundle extras = intentN.getExtras();
position = extras.getInt("POSITION");
tORf = extras.getString("FROM_LIST_ACTIVITY");
tvDA = findViewById(R.id.tvDA);
btnSave = findViewById(R.id.btnSave);
btnDelete = findViewById(R.id.btnDelete);
btnUpdate = findViewById(R.id.btnUpdate);
etWebSite = findViewById(R.id.etWebSite);
etUN = findViewById(R.id.etUN);
etPW = findViewById(R.id.etPW);
etSecQuestion = findViewById(R.id.etSecQuestion);
etSecAnswer = findViewById(R.id.etSecAnswer);
etNotes = findViewById(R.id.etNotes);
imageTB = findViewById(R.id.imageTB);
addListenerOnButtonSave();
addListenerOnButtonDelete();
addListenerOnButtonUpdate();
addTextChangedListener();
hint_text_listener();
//Works with METHOD TO PERMIT Notes Editing
//==========================================
imageTB.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {
etNotes.setEnabled(true);
etNotes.requestFocus();
etNotes.setFocusableInTouchMode(true);
Toast.makeText(DetailsActivity.this, "Now You Can Edit", Toast.LENGTH_LONG).show();
return false;
}
});
if (tORf.equals("true")) {
tvDA.setText("Add New Data");
} else {
tvDA.setText("Detail View");
btnDelete.setVisibility(View.VISIBLE);
btnUpdate.setVisibility(View.VISIBLE);
if(tvDA.getText().toString().equals("Add New Data")){
etNotes.setHint(R.string.hint_edit);
}else{
etNotes.setHint("");
// This IF statement decides if HINT text is shown or NOT
// DO NOT WANT Hint Text with an EDIT of Data
}
}
setTitle("");
// We do not want a title on DetailActivity toolbar this removes the title
// Title is set in the ABOVE if statements based on what was selected on List View
//=================================================================================
Toolbar topToolBar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(topToolBar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
helper = new DBHelper(this);
dbList = new ArrayList<>();
dbList = helper.getDataFromDB();
if (dbList.size() > 0 && tORf.equalsIgnoreCase("false")) {
btnSave.setVisibility(View.INVISIBLE);
String Nwhat = dbList.get(position).getRowid();
String Nwebsite = dbList.get(position).getWebsite();
String Nusername = dbList.get(position).getUsernane();
String Npassword = dbList.get(position).getPassword();
String Nquestion = dbList.get(position).getQuestion();
String Nanswer = dbList.get(position).getAnswer();
String Nnotes = dbList.get(position).getNotes();
etWebSite.setText(Nwebsite);
etUN.setText(Nusername);
etPW.setText(Npassword);
etSecQuestion.setText(Nquestion);
etSecAnswer.setText(Nanswer);
etNotes.setText(Nnotes);
}
}// END onCreate Bundle
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
public void hint_text_listener() {
/*
This listener is set in the onCreate Bundle section of the program
It fires when the EditText field etSecAnswer gains focus WHY ?
etSecAnswer is a required field when SAVEING where as etNotes is not required
*/
etSecAnswer.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View view, boolean hasFocus) {
if (hasFocus) {
etNotes.setHint(null);
}
}
});
}
/* CODE below manages the etNotes by limiting the etNotes to 3 lines */
/* and it removes the 4th line when the ENTER key is pressed it also renders */
/* the etNotes DISABLED hence the need for the OnLongClickListener on the Image Keys */
private void addTextChangedListener() {
etNotes.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
int L = etNotes.getLineCount();
if (L > 3) {
etNotes.getText().delete(etNotes.getSelectionEnd() - 1, etNotes.getSelectionStart());
//etNotes.append("\b"); Used for TESTING line of code above
etNotes.setEnabled(false);
Toast.makeText(DetailsActivity.this, "Only 3 Lines Permitted\n\nLong Press on the Keys to Edit", Toast.LENGTH_LONG).show();
}
}
});
}
private void addListenerOnButtonDelete() {
btnDelete.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
// Calls the Method deleteDBRow in DatabaseHelper
// which acts on the TABLE_INFO to remove a record by getting the record ID
helper.deleteDBRow(String.valueOf(dbList.get(position).getRowid()));
ListActivity.removeListRow(position);
// Code line above calls Method in ListActivity to notify recycler view of changes
// NOTICE the List keeps items by position not record ID <== READ
etWebSite.setText("");
etUN.setText("");
etPW.setText("");
etSecQuestion.setText("");
etSecAnswer.setText("");
etNotes.setText("");
Intent intent = new Intent(DetailsActivity.this, ListActivity.class);
startActivity(intent);
}
});
}
private void addListenerOnButtonUpdate() {
btnUpdate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String website = etWebSite.getText().toString();
String username = etUN.getText().toString();
String password = etPW.getText().toString();
String question = etSecQuestion.getText().toString();
String answer = etSecAnswer.getText().toString();
String notes = etNotes.getText().toString();
if (etWebSite.length() == 0) {
Toast.makeText(DetailsActivity.this, "Enter Web-Site Name", Toast.LENGTH_LONG).show();
etWebSite.requestFocus();
return;
}
if (etUN.length() == 0) {
Toast.makeText(DetailsActivity.this, "Enter Username", Toast.LENGTH_LONG).show();
etUN.requestFocus();
return;
}
if (etPW.length() == 0) {
Toast.makeText(DetailsActivity.this, "Enter Password", Toast.LENGTH_LONG).show();
etPW.requestFocus();
return;
}
if (etSecQuestion.length() == 0) {
Toast.makeText(DetailsActivity.this, "Enter Security Question", Toast.LENGTH_LONG).show();
etSecQuestion.requestFocus();
return;
}
if (etSecAnswer.length() == 0) {
Toast.makeText(DetailsActivity.this, "Enter Security Answer", Toast.LENGTH_LONG).show();
etSecAnswer.requestFocus();
return;
}
String rowid = dbList.get(position).getRowid();
helper.updateDBRow(rowid, website, username, password, question, answer, notes);
etWebSite.setText("");
etUN.setText("");
etPW.setText("");
etSecQuestion.setText("");
etSecAnswer.setText("");
etNotes.setText("");
Intent intentTO = new Intent(DetailsActivity.this, ListActivity.class);
startActivity(intentTO);
Toast.makeText(DetailsActivity.this, "Record Updated", Toast.LENGTH_LONG).show();
}
});
}
private void addListenerOnButtonSave() {
btnSave.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String website = etWebSite.getText().toString();
String username = etUN.getText().toString();
String password = etPW.getText().toString();
String question = etSecQuestion.getText().toString();
String answer = etSecAnswer.getText().toString();
String notes = etNotes.getText().toString();
if (etWebSite.length() == 0) {
Toast.makeText(DetailsActivity.this, "Enter Web-Site Name", Toast.LENGTH_LONG).show();
etWebSite.requestFocus();
return;
}
if (etUN.length() == 0) {
Toast.makeText(DetailsActivity.this, "Enter Username", Toast.LENGTH_LONG).show();
etUN.requestFocus();
return;
}
if (etPW.length() == 0) {
Toast.makeText(DetailsActivity.this, "Enter Password", Toast.LENGTH_LONG).show();
etPW.requestFocus();
return;
}
if (etSecQuestion.length() == 0) {
Toast.makeText(DetailsActivity.this, "Enter Security Question", Toast.LENGTH_LONG).show();
etSecQuestion.requestFocus();
return;
}
if (etSecAnswer.length() == 0) {
Toast.makeText(DetailsActivity.this, "Enter Security Answer", Toast.LENGTH_LONG).show();
etSecAnswer.requestFocus();
return;
}
helper.insertIntoDB(website, username, password, question, answer, notes);
etWebSite.setText("");
etUN.setText("");
etPW.setText("");
etSecQuestion.setText("");
etSecAnswer.setText("");
etNotes.setText("");
Intent intentTO = new Intent(DetailsActivity.this, ListActivity.class);
startActivity(intentTO);
Toast.makeText(DetailsActivity.this, "Record Added", Toast.LENGTH_LONG).show();
}
});
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == android.R.id.home) {// Little BACK <== arrow key on ToolBar
Intent intent = new Intent(DetailsActivity.this, ListActivity.class);
startActivity(intent);
return true;
}
if (id == R.id.action_ReSetPW) {
// This is the menu ReSetPW button for Master Password
// It lives in the menu_main.xml file
doCustom();
}
return super.onOptionsItemSelected(item);
}
private void doCustom(){
/* This method uses the custom_dialog.xml file created for greater control over
the styling of the Custom Alert Dialog for various screen sizes and to be
able to set the text size of the dialog message text
*/
final Dialog openDialog = new Dialog(context);
openDialog.setContentView(R.layout.custom_dialog);
Button btnYES = openDialog.findViewById(R.id.btnYES);
Button btnNO = openDialog.findViewById(R.id.btnNO);
openDialog.setCancelable(false);
// if YES delete Master Password from TABLE_MPW
btnYES.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
SharedPreferences pref = getSharedPreferences("MyPref", MODE_PRIVATE);
pref.edit().remove("nameKey").apply();
db = helper.getReadableDatabase();
String q = "SELECT * FROM "+ TABLE_PW;
Cursor cursor = db.rawQuery(q,null);
// Above query gets TABLE_PW data from Col_IDI
// TABLE_PW will only ever have one row of data
int rowID = 99;
if(cursor.moveToFirst()){
rowID = cursor.getInt(cursor.getColumnIndex(Col_IDI));
str = cursor.getString(cursor.getColumnIndex(Col_MPW));
}
cursor.close();
// Line of code below WORKS deletes entire TABLE <=====
// Not a recommended way to re-set the master password
// db.delete(TABLE_PW, null, null);
String num = Integer.toString(rowID);
db.delete(TABLE_PW, Col_IDI + " = ?", new String[] { num });
db.close();
openDialog.dismiss();
Intent intentYY = new Intent(DetailsActivity.this, MainActivity.class );
startActivity( intentYY );
Toast.makeText(getApplicationContext(), "Changed the Password", Toast.LENGTH_SHORT).show();
}
});
btnNO.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
openDialog.dismiss();
Intent intent = new Intent( DetailsActivity.this, ListActivity.class );
startActivity( intent );
Toast.makeText(getApplicationContext(), "Password NOT Changed", Toast.LENGTH_SHORT).show();
}
});
openDialog.show();
}
public void onBackPressed(){
Intent intent = new Intent( DetailsActivity.this, ListActivity.class );
startActivity( intent );
}