hi all first thing i was looking for answer all day for this and i dont find out nothing i try to save a simple thing i need to save the background color and the "points" that the user pres on a button i will explain the user need to press button that change background color and after a button that increse textview by +1.
after i close the app and return i want that the app will show the last background color that the user chose and how ,much time the +1 button was clicked:
here the code: xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.hanansanag.colorbeck.MainActivity">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="home work :)"
android:layout_gravity="center"
android:textSize="20sp"
android:textStyle="bold"/>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:orientation="horizontal">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="change bg :"
android:textStyle="bold"
android:textSize="15sp"
android:id="@+id/Tv2"
android:textAllCaps="false"/>
<Button
android:layout_width="80dp"
android:layout_height="50dp"
android:layout_marginLeft="10dp"
android:id="@+id/cred"
android:text="red"
android:background="@drawable/redbutton"
android:textAllCaps="false"/>
<Button
android:layout_width="80dp"
android:layout_height="50dp"
android:text="green"
android:id="@+id/cgreen"
android:layout_marginLeft="10dp"
android:background="@drawable/greenbtm"
android:textAllCaps="false"/>
<Button
android:layout_width="80dp"
android:layout_height="50dp"
android:background="@drawable/blue222"
android:id="@+id/cblue"
android:layout_marginLeft="10dp"
android:text="blue"
android:textAllCaps="false"/>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:layout_width="70dp"
android:layout_height="70dp"
android:background="@drawable/easyyyyy"
android:id="@+id/btnadd"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="0"
android:id="@+id/tv"
android:textSize="20sp"
android:layout_marginLeft="70dp"/>
</LinearLayout>
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content">
<Button
android:layout_width="70dp"
android:id="@+id/save"
android:layout_height="70dp"
android:layout_marginLeft="110dp"
android:background="@drawable/save"/>
</LinearLayout>
</LinearLayout>
and here is the java code :
package com.example.hanansanag.colorbeck;
import android.content.SharedPreferences;
import android.graphics.Color;
import android.preference.PreferenceManager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
private Button btnred,btngreen,btnblue,btnpluse,btnsave;
private LinearLayout mlinearLayout;
private TextView tv;
int point = 0;
public SharedPreferences sp;
private int progress;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
sp= getSharedPreferences("save",0);
String textValue = sp.getString("textvalue","");
mlinearLayout=(LinearLayout)findViewById(R.id.activity_main);
btnred = (Button) findViewById(R.id.cred);
btnblue = (Button) findViewById(R.id.cblue);
btngreen = (Button) findViewById(R.id.cgreen);
btnpluse = (Button)findViewById(R.id.btnadd);
btnsave = (Button)findViewById(R.id.save);
tv=(TextView)findViewById(R.id.tv) ;
btnred.setOnClickListener(this);
btnsave.setOnClickListener(this);
btnpluse.setOnClickListener(this);
btnblue.setOnClickListener(this);
btngreen.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if (btnred == v){
mlinearLayout.setBackgroundColor(Color.RED);
}
else if (btngreen == v){
mlinearLayout.setBackgroundColor(Color.GREEN);
}
else if (btnblue == v){
mlinearLayout.setBackgroundColor(Color.BLUE);
}
else if (btnpluse== v){
point++;
tv.setText("" + point);
}
else if (btnsave == v){
Toast.makeText(this,"btn clickd",Toast.LENGTH_LONG).show();
SharedPreferences.Editor editor = sp.edit();
editor.putString("textValue",tv.getText().toString());
editor.commit();
}
}
}
like you see i try here SharedPreferences on the Textview but after i close and return i dont see nothing i know i do something wrong but i dont know what.
ty all for the time and help
Change the SharedPreference bits in btnsave to:
SharedPreferences.Editor editor = getSharedPreferences(save, MODE_PRIVATE).edit();
editor.putString("textValue",tv.getText().toString());
editor.commit();
And in OnCreate change the SharedPreference bits to:
SharedPreferences prefs = getSharedPreferences(save, MODE_PRIVATE);
String textValue= prefs.getString("textValue", "0");
And add this code after you have declared tv as a TextView.
tv.setText(textValue)
In each button for changing background colour, put this code and change my variable 'COLOUR' to 'BLUE', 'RED' etc.
SharedPreferences.Editor editor = getSharedPreferences(saveColour, MODE_PRIVATE).edit();
editor.putString("colourValue",COLOUR);
editor.commit();
Then on create, call this:
SharedPreferences prefs = getSharedPreferences(saveColour, MODE_PRIVATE);
String colourValue = prefs.getString("colourValue", WHITE);
And after you have declared mLinearLayout:
mlinearLayout.setBackgroundColor(Color.colourValue);