所以基本上我正在创建一个Android应用程序，其中一个功能是模拟生命体征。有4个变量：温度，舒张压，收缩压和心率。这4个变量是随机生成的，并与设定值进行比较，并确定用户是否有风险。所有这些都发生在CalculationRisk类中。
结果显示在文本视图中，如下所示：
Simulation Results
Temperature: 39
Diastolic Blood Pressure: 107
Systolic Blood Pressure: 224
Heart Rate: 151
Risk Results
Temperature: HIGH RISK
Diastolic Blood Pressure: NORMAL
Systolic Blood Pressure: HIGH RISK
Heart Rate: LOW RISK
每个测量都存储在VitalsDB类中名为MEASUREMENTS_TABLE的表中。我想要做的是点击一个按钮，我希望这些值保存到名为“text”的文本文件中。
文字档案：
Height: 175
Weight: 80
Diastolic Blood Pressure: 100
Systolic Blood Pressure: 100
Heart Rate: 170
Body Temperature: 100
此文本文件存储在assets文件夹中，并在SummaryCareRecord类中读取。但问题是我想添加到文本文件中，所以无论什么已经存在，应该在文本视图中显示值。
CalculationRisk：
package com.example.testapp;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.text.method.ScrollingMovementMethod;
import android.view.View;
import android.view.WindowManager;
import android.widget.Button;
import android.widget.ImageButton;
import android.widget.TextView;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.Random;
import static java.text.DateFormat.getTimeInstance;
public class CalculateRisk extends AppCompatActivity {
TextView tv_text2;
String name = "";
String address = "";
String date_of_birth = "";
String medication1 = "";
String medication2 = "";
String medication3 = "";
String allergies = "";
String bad_reactions = "";
int height = 0;
int weight = 0;
int DBP = 0;
int SBP = 0;
int pulse_rate = 0;
int blood_glucose = 0;
int respiration_rate = 0;
int body_temperature = 0;
Button btn_pm;
VitalsDB db;
int highRiskCount = 0;
String verdictTemp = null;
String verdictHR = null;
String verdictDBP = null;
String verdictSBP = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_calculate_risk);
db = new VitalsDB(getBaseContext());
getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN);
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(CalculateRisk.this);
int h = 0;
int userPosition = preferences.getInt("positionCount", h);
tv_text2 = (TextView) findViewById(R.id.textView2);
tv_text2.setText("");
tv_text2.setMovementMethod(new ScrollingMovementMethod());
btn_pm = (Button) findViewById(R.id.btn_pm);
btn_pm.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
startActivity(new Intent(CalculateRisk.this, PastMeasurements.class));
}
});
final TextView HRMeasureText = (TextView) findViewById(R.id.result_label);
ImageButton results = (ImageButton) findViewById(R.id.button_calculate);
results.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
Random random = new Random();
int SBP = random.nextInt(180) + 70;
int DBP = random.nextInt(110) + 70;
int pulse_rate = random.nextInt(180)+ 60;
int body_temperature = random.nextInt(32)+ 10;
if (body_temperature > 38) {
verdictTemp = "HIGH RISK";
highRiskCount += 1;
} else if (body_temperature <= 38 && body_temperature > 37) {
verdictTemp = "LOW RISK";
} else if (body_temperature <= 37) {
verdictTemp = "NORMAL";
}
if (DBP >= 180) {
verdictDBP = "HIGH RISK";
highRiskCount += 1;
} else if (DBP < 180 && DBP > 120) {
verdictDBP = "LOW RISK";
} else if (DBP <= 120) {
verdictDBP = "NORMAL";
}
if (SBP >= 110) {
verdictSBP = "HIGH RISK";
highRiskCount += 1;
} else if (SBP < 110 && SBP > 80) {
verdictSBP = "LOW RISK";
} else if (SBP <= 80) {
verdictSBP = "NORMAL";
}
if (pulse_rate > 160) {
verdictHR = "HIGH RISK";
highRiskCount += 1;
} else if (pulse_rate <= 160 && pulse_rate > 72) {
verdictHR = "LOW RISK";
} else if (pulse_rate <= 72) {
verdictHR = "NORMAL";
}
HRMeasureText.setVisibility(View.VISIBLE);
TextView output = (TextView) findViewById(R.id.output_riskyness);
output.setText(String.valueOf(highRiskCount));
SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(CalculateRisk.this);
int h = 0;
int userPosition = preferences.getInt("positionCount", h);
/***************************** INSERT NEW CALCULATION RECORD *********************/
Calculation calc = new Calculation();
//temperature data
calc.setTemperatureReading(body_temperature);
calc.setVerdictTemp(verdictTemp);
//Heart Rate data
calc.setHeartRateReading(pulse_rate);
calc.setVerdictHR(verdictHR);
//diastolic blood pressure data
calc.setDBPReading(DBP);
calc.setVerdictDBP(verdictDBP);
//diastolic blood pressure data
calc.setSBPReading(SBP);
calc.setVerdictSBP(verdictSBP);
//Date Data
Calendar calendar = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy");
String strDate = sdf.format(calendar.getTime());
calc.setDate(strDate);
//Time Data
long millis = new Date().getTime();
String time = getTimeInstance(SimpleDateFormat.MEDIUM, Locale.UK).format(millis);
String strTime = time + " GMT";
calc.setTime(strTime);
db.open();
db.insertCalculation(calc);
db.close();
// final AlertDialog.Builder highRiskAlert = new AlertDialog.Builder(CalculateRisk.this);
// highRiskAlert.setMessage("An SMS has been sent to alert your GP of your measurements, and an appointment will be booked. \n" +
// "\nPlease keep an eye on your inbox for your GP's confirmation of the appointment.");
// highRiskAlert.setTitle("HIGH RISK!");
//
// highRiskAlert.setCancelable(false);
AlertDialog.Builder resultAlert = new AlertDialog.Builder(CalculateRisk.this);
tv_text2.setText("\nSimulation Results: " + "\n\n" +
"Temperature: " + body_temperature + " Diastolic Blood Pressure: " + DBP + "\n\n" +
"Systolic Blood Pressure: " + SBP + " Heart Rate: " + pulse_rate + "\n\n" + "\n\n"+
"Risk Results:" + "\n\n"+
"Temperature:" + verdictTemp + " DBP:" + verdictDBP + "\n\n"+
"SBP:" + verdictSBP + " Heart Rate:" + verdictHR);
// resultAlert.setMessage("Results:" + "\n\n" +
// "Temperature Risk: " + verdictTemp + "\n\n" +
// "DBP Risk:" + verdictDBP + "\n\n" +
// "SBP Risk:" + verdictSBP + "\n\n" +
// "Heart Rate Risk:" + verdictHR
// );
if (verdictTemp == "HIGH RISK"){
resultAlert.setMessage("WARNING Temperature too high");
}
if(verdictDBP == "HIGH RISK"){
resultAlert.setMessage("WARNING DBP too high");
}
if(verdictSBP == "HIGH RISK"){
resultAlert.setMessage("WARNING SBP too high");
}
if(verdictHR == "HIGH RISK"){
resultAlert.setMessage("WARNING Heart Rate too high");
}
if(verdictTemp == "HIGH RISK" & verdictDBP == "HIGH RISK"){
resultAlert.setMessage("WARNING Temperature and DBP too high ");
}
if(verdictTemp == "HIGH RISK" & verdictSBP == "HIGH RISK"){
resultAlert.setMessage("WARNING Temperature and SBP too high");
}
if(verdictTemp == "HIGH RISK" & verdictHR == "HIGH RISK"){
resultAlert.setMessage("WARNING Temperature and Heart Rate too high");
}
if(verdictDBP == "HIGH RISK" & verdictSBP == "HIGH RISK"){
resultAlert.setMessage("WARNING DBP and SBP too high");
}
if(verdictDBP == "HIGH RISK" & verdictHR == "HIGH RISK"){
resultAlert.setMessage("WARNING DBP and Heart Rate too high");
}
if(verdictSBP == "HIGH RISK" & verdictHR == "HIGH RISK"){
resultAlert.setMessage("WARNING SBP and Heart Rate too high");
}
if(verdictTemp == "HIGH RISK" & verdictDBP == "HIGH RISK" & verdictSBP == "HIGH RISK"){
resultAlert.setMessage("WARNING Temperature, DBP and SBP too high PLEASE SEEK ATTENTION");
}
if(verdictTemp == "HIGH RISK" & verdictDBP == "HIGH RISK" & verdictHR == "HIGH RISK"){
resultAlert.setMessage("WARNING Temperature, DBP and Heart Rate too high PLEASE SEEK ATTENTION");
}
if(verdictTemp == "HIGH RISK" & verdictSBP == "HIGH RISK" & verdictHR == "HIGH RISK"){
resultAlert.setMessage("WARNING Temperature,SBP and Heart Rate too high PLEASE SEEK ATTENTION");
}
if(verdictDBP == "HIGH RISK" & verdictSBP == "HIGH RISK" & verdictHR == "HIGH RISK"){
resultAlert.setMessage("WARNING DBP, SBP and Heart Rate too high PLEASE SEEK ATTENTION");
}
if(verdictTemp == "HIGH RISK" & verdictDBP == "HIGH RISK" & verdictSBP == "HIGH RISK" & verdictHR == "HIGH RISK"){
resultAlert.setMessage("WARNING Temperature,DBP, SBP and Heart Rate too high" + "\n\n" +
"PLEASE SEEK IMMEDIATE ATTENTION");
}
resultAlert.setTitle("Results");
resultAlert.setPositiveButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
highRiskCount = 0;
}
});
resultAlert.setCancelable(false);
resultAlert.create().show();
}
});
tv_text2.setText("Results");
}
}
VitalsDB：
package com.example.testapp;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
public class VitalsDB {
//variables for all columns in database
private static final String TAG = "DBHelper";
private static final String DATABASE_NAME = "VitalsDB2";
private static final String MEASUREMENTS_TABLE = "measurements";
public static final String COLUMN_MEASUREMENTID = "measureid";
public static final String COLUMN_DATE = "date";
public static final String COLUMN_TIME = "time";
public static final String COLUMN_TEMPERATURE = "temperature";
public static final String COLUMN_TEMPERATURE_VERDICT = "temperature_verdict";
public static final String COLUMN_SBP = "sbp";
public static final String COLUMN_SBP_VERDICT = "sbp_verdict";
public static final String COLUMN_DBP = "dbp";
public static final String COLUMN_DBP_VERDICT = "dbp_verdict";
public static final String COLUMN_HEARTRATE = "heartrate";
public static final String COLUMN_HEARTRATE_VERDICT = "heartrate_verdict";
private static final int DATABASE_VERSION = 2;
// public VitalsDB(Context context) {
// super(context, DATABASE_NAME, null, DATABASE_VERSION);
// }
//
//
// //creating tables
// public void onCreate(SQLiteDatabase db){
// String CREATE_MEASUREMENTS_TABLE1 = "CREATE TABLE" + MEASUREMENT_TABLE1 + "( MEASUREMENTID INTEGER PRIMARY KEY, Date TEXT, Time TEXT, Temperature INTEGER, Temperature_Verdict TEXT, Lbp INTEGER, Lbp_Verdict TEXT, Hbp INTEGER, Hbp_Verdict TEXT, Heartrate INTEGER, Heartrate_verdict TEXT) ";
// db.execSQL(CREATE_MEASUREMENTS_TABLE1);
// Log.d("DatabaseHandler","Database Created");
// }
//
//
// // Upgrading database
// @Override
// public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// // Drop older table if existed
// db.execSQL("DROP TABLE IF EXISTS " + MEASUREMENTS_TABLE1);
// // Create tables again
// onCreate(db);
// }
//string query to hold database table name and order of columns
private static final String CREATE_MEASUREMENTS_TABLE = "create table "+ MEASUREMENTS_TABLE + "("
+ COLUMN_MEASUREMENTID + " integer primary key autoincrement, "
+ COLUMN_DATE + " text, "
+ COLUMN_TIME + " text, "
+ COLUMN_TEMPERATURE + " text not null, "
+ COLUMN_TEMPERATURE_VERDICT + " text not null, "
+ COLUMN_SBP + " text not null, "
+ COLUMN_SBP_VERDICT + " text not null, "
+ COLUMN_DBP + " text not null, "
+ COLUMN_DBP_VERDICT + " text not null, "
+ COLUMN_HEARTRATE + " text not null, "
+ COLUMN_HEARTRATE_VERDICT + " text not null )";
//variables for holding database context, helper and SQLite instances
private final Context context;
private DatabaseHelper DBHelper;
private SQLiteDatabase db;
//method to create instance of database helper
public VitalsDB(Context ctx)
{
this.context = ctx;
DBHelper = new DatabaseHelper(context);
}
private static class DatabaseHelper extends SQLiteOpenHelper {
//generate instance of database helper with defined database name and version
DatabaseHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
//first method ran on load of class
@Override
public void onCreate(SQLiteDatabase db){
db.execSQL(CREATE_MEASUREMENTS_TABLE);
}
//if the database is updated, wipe it to prevent conflicts
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion){
Log.w(TAG, "Upgrading database from version " + oldVersion + " to "
+ newVersion + ", which will destroy all old data");
db.execSQL("DROP TABLE IF EXISTS " + MEASUREMENTS_TABLE);
onCreate(db);
}
}
//open database
public VitalsDB open() throws SQLException {
db = DBHelper.getWritableDatabase();
//sqlDB = DBHelper.getWritableDatabase();
return this;
}
//close the database
public void close() {
DBHelper.close();
}
//add new row and calc to database
public void insertCalculation(Calculation calc) {
//populate rows with measurements
ContentValues newCalc = new ContentValues();
newCalc.put(COLUMN_TEMPERATURE, calc.getTemperatureReading());
newCalc.put(COLUMN_SBP, calc.getSBPReading());
newCalc.put(COLUMN_DBP, calc.getDBPReading());
newCalc.put(COLUMN_HEARTRATE, calc.getHeartRateReading());
newCalc.put(COLUMN_DATE, calc.getDate());
newCalc.put(COLUMN_TIME, calc.getTime());
newCalc.put(COLUMN_TEMPERATURE_VERDICT, calc.getVerdictTemp());
newCalc.put(COLUMN_SBP_VERDICT, calc.getVerdictSBP());
newCalc.put(COLUMN_DBP_VERDICT, calc.getVerdictDBP());
newCalc.put(COLUMN_HEARTRATE_VERDICT, calc.getVerdictHR());
db.insert(MEASUREMENTS_TABLE, null, newCalc);
}
public Cursor getCalculation() {
//query database for current row for data
Cursor mCursor = db.rawQuery("select * from " + MEASUREMENTS_TABLE, null);
if (mCursor != null) {
mCursor.moveToFirst();
}
//return the cursor
return mCursor;
}
}
摘要护理记录：
package com.example.testapp;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class SummaryCareRecord extends Activity {
Button b_read;
TextView tv_text;
String name = "";
String address = "";
String date_of_birth = "";
String medication1 = "";
String medication2 = "";
String medication3 = "";
String allergies = "";
String bad_reactions = "";
int height = 0;
int weight = 0;
int blood_pressure = 0;
int pulse_rate = 0;
int blood_glucose = 0;
int respiration_rate = 0;
int body_temperature = 0;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_scr);
tv_text = (TextView) findViewById(R.id.tv_text);
Read(tv_text);
}
public void Read(View view) {
String text = "";
try {
BufferedReader bufferedReader = new BufferedReader(
new InputStreamReader(getAssets().open("test.txt")));
String line;
while((line = bufferedReader.readLine()) != null){
text = text.concat(line + "\n");
// String[] lineVals = line.split(":");
// if(lineVals[0].equalsIgnoreCase("name")){
// name = lineVals[1].trim();
// } else if(lineVals[0].equalsIgnoreCase("height")){
// height = Integer.parseInt(lineVals[1].trim());
// }
// else if(lineVals[0].equalsIgnoreCase("weight")){
// weight = Integer.parseInt(lineVals[1].trim());
// }
// else if(lineVals[0].equalsIgnoreCase("blood pressure")){
// blood_pressure = Integer.parseInt(lineVals[1].trim());
// } else if(lineVals[0].equalsIgnoreCase("pulse rate")){
// pulse_rate = Integer.parseInt(lineVals[1].trim());
// }
// else if(lineVals[0].equalsIgnoreCase("blood glucose")){
// blood_glucose = Integer.parseInt(lineVals[1].trim());
// }
// else if(lineVals[0].equalsIgnoreCase("respiration rate")){
// respiration_rate = Integer.parseInt(lineVals[1].trim());
// }
// else if(lineVals[0].equalsIgnoreCase("body temperature")){
// body_temperature = Integer.parseInt(lineVals[1].trim());
// }
}
} catch (IOException ex) {
ex.printStackTrace();
}
tv_text.setText(text);
}
}
Pastmeasurements
答案 0 :(得分：0)
我相信assets文件夹是受保护的，只能被读取，因为它是用于安装App的软件包的一部分，因此您将无法将资产文件夹中的文件（任何文件）保存在应用
当然，您已经拥有了一种非常高效且易于使用的方法，可以将数据写入文件，从而保留数据，即使用SQLite数据库。
从表面上看，最好的方法是在数据库中添加一个新表，其中包含名称，高度，重量，bp，bgl，rr和bt的列。