تمرینات انجام شده در کلاس

تمرین اول

کد XML نمایش عکس

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">
    <GridView
        android:id="@+id/gridview"
        android:layout_width="fill_parent"
        android:layout_height="match_parent"
        android:numColumns="3"
        android:columnWidth="450dp"
        android:horizontalSpacing="10dp"
        android:verticalSpacing="10dp"
        android:gravity="center"
        tools:ignore="MissingConstraints">
    </GridView>

</androidx.constraintlayout.widget.ConstraintLayout>

================================

کد جاوا نمایش عکس

package com.example.examp1;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.content.Context;
import android.content.res.Resources;
import android.util.TypedValue;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity {
public Integer[] myImages = {
R.drawable.image1,
R.drawable.image2,
R.drawable.image3,
R.drawable.image2,
R.drawable.image1,
R.drawable.image3,

};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
GridView gridview = (GridView) findViewById(R.id.gridview);
gridview.setAdapter(new ImageAdapter(this));

gridview.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View v,
int position, long id) {
String position_string = “ss1 ” + String.valueOf(position+1) + ” in GridView”;
Toast.makeText(getApplicationContext(), position_string, Toast.LENGTH_SHORT).show();
}
});
}

public static int convertDpToPixels(float dp, Context context){
Resources resources = context.getResources();
return (int) TypedValue.applyDimension(
TypedValue.COMPLEX_UNIT_DIP,
dp,
resources.getDisplayMetrics()
);
}

public class ImageAdapter extends BaseAdapter{
private Context mContext;
public int getCount() {
return myImages.length;
}
public Object getItem(int position) {
return myImages[position];
}
public long getItemId(int position) {
return 0;
}
public ImageAdapter(Context c) {
mContext = c;
}

public View getView(int position, View convertView, ViewGroup parent) {
ImageView imageView;
if (convertView == null){
imageView = new ImageView(mContext);
float w = 200;
float h = 200;
int width_pixel = convertDpToPixels(w,MainActivity.this);
int height_pixel = convertDpToPixels(h,MainActivity.this);
imageView.setLayoutParams(new GridView.LayoutParams(width_pixel, height_pixel));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(8, 8, 8, 8);
imageView.setMaxHeight(60);
}else{
imageView = (ImageView) convertView;
}
imageView.setBackgroundResource(myImages[position]);
return imageView;
}

}
}

عکس برنامه اجرا شده

تمرین دوم

کار با LinearLayout

کد های XML


    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

خروجی اجرای برنامه

تمرین سوم

کار با لایوت جدول

کد XML


    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

android:layout_width=”match_parent”
android:layout_height=”match_parent”

android:stretchColumns=”*”>

<TableRow
android:layout_width=”fill_parent”

android:layout_height=”wrap_content”>

android:layout_width=”wrap_content”
android:text=”0″
android:layout_margin=”20px”
android:textAlignment=”textEnd”
android:layout_span=”4″
android:id=”@+id/hasel”
/>

<TableRow
android:layout_width=”match_parent”
android:layout_height=”wrap_content”>
android:layout_height=”wrap_content”
android:layout_margin=”10px”
android:text=”7″/>
android:layout_height=”wrap_content”
android:layout_margin=”10px”
android:text=”8″/>
android:layout_height=”wrap_content”
android:layout_margin=”10px”
android:text=”9″/>
android:layout_height=”wrap_content”
android:layout_margin=”10px”
android:text=”*”/>
<TableRow
android:layout_width=”match_parent”
android:layout_height=”wrap_content”>
android:layout_height=”wrap_content”
android:layout_margin=”10px”
android:text=”4″/>
android:layout_height=”wrap_content”
android:layout_margin=”10px”
android:text=”5″/>
android:layout_height=”wrap_content”
android:layout_margin=”10px”
android:text=”6″/>
android:layout_height=”wrap_content”
android:layout_margin=”10px”
android:text=”/”/>

<TableRow
android:layout_width=”match_parent”
android:layout_height=”wrap_content”>
android:layout_height=”wrap_content”
android:layout_margin=”10px”
android:text=”1″/>
android:layout_height=”wrap_content”
android:layout_margin=”10px”
android:text=”2″/>
android:layout_height=”wrap_content”
android:layout_margin=”10px”
android:text=”3″/>
android:layout_height=”wrap_content”
android:layout_margin=”10px”
android:text=”-“/>
<TableRow
android:layout_width=”match_parent”
android:layout_height=”wrap_content”>
android:layout_height=”wrap_content”
android:layout_margin=”10px”
android:text=”0″/>
android:layout_height=”wrap_content”
android:layout_margin=”10px”
android:text=”.”/>
android:id=”@+id/mosavi”
android:layout_height=”wrap_content”
android:layout_margin=”10px”
android:text=”=”/>
android:layout_height=”wrap_content”
android:layout_margin=”10px”
android:text=”+”/>

خرروجی اجرای برنامه

تمرین جهارم

کار بادکمه Button با زدن دکمه صفحه دوم نمایش داده شود

کد XML صفحه اول

xmlns:app=”http://schemas.android.com/apk/res-auto”
xmlns:tools=”http://schemas.android.com/tools”
android:layout_width=”match_parent”
android:layout_height=”match_parent”
tools:context=”.MainActivity2″>
<Button
android:id=”@+id/showlist”
android:layout_width=”wrap_content”
android:layout_height=”wrap_content”
android:text=”نمایش لیست دانشجویان”
tools:ignore=”MissingConstraints” />

کد XML صفحه دوم

کد جاوا صفحه اول

package com.example.examplm4;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity2 extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);
Button ShBtn=(Button) findViewById(R.id.showlist);
ShBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent=new Intent(MainActivity2.this,MainActivity.class);
startActivity(intent);
}
});
}
}

خروجی اجرای برنامه

تمرین پنجم

برنامه ماشین حساب

کد XML


    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"

tools:context=”.MainActivity”>
<ScrollView
android:layout_width=”match_parent”
android:layout_height=”match_parent”>
<LinearLayout
android:layout_width=”match_parent”
android:layout_height=”match_parent”
android:orientation=”vertical”
android:gravity=”center”
android:background=”#9147DC”
>

<LinearLayout
android:layout_width=”wrap_content”
android:layout_gravity=”center”
android:layout_height=”wrap_content”
android:orientation=”horizontal”

>
<Button
android:id=”@+id/btn12″
android:text=”7″
android:layout_width=”30pt”
android:layout_height=”30pt”
android:backgroundTint=”#DF0E55″
android:layout_margin=”10px”
/>

<Button
android:id=”@+id/btn13″
android:text=”8″
android:layout_width=”30pt”
android:layout_height=”30pt”
android:backgroundTint=”#DF0E55″
android:layout_margin=”10px”
/>
<Button
android:id=”@+id/btn14″
android:text=”9″
android:layout_width=”30pt”
android:layout_height=”30pt”

android:backgroundTint=”#DF0E55″
android:layout_margin=”10px”/>
<Button
android:id=”@+id/btn15″
android:text=”*”
android:layout_width=”30pt”
android:layout_height=”30pt”
android:backgroundTint=”#DF0E55″
android:layout_margin=”10px”

کد جاوا

package com.example.exampm1;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
public String NumberT=””;
public int result=0;
public int resultK=0;
public String op;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

TextView txt=(TextView)findViewById(R.id.tx1);
//txt.setText(“65766”);
Button ac=(Button) findViewById(R.id.AC);
ac.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
NumberT=””;
txt.setText(NumberT);

}
});
Button btn4=(Button) findViewById(R.id.btn4);
btn4.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
NumberT=NumberT+”1″;
txt.setText(NumberT);

}
});
Button btn0=(Button) findViewById(R.id.btn0);
btn0.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
NumberT=NumberT+”0″;
txt.setText(NumberT);

}
});

Button btn5=(Button) findViewById(R.id.btn5);
btn5.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
NumberT=NumberT+”2″;
txt.setText(NumberT);
}
});

Button btn6=(Button) findViewById(R.id.btn6);
btn6.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {

NumberT=NumberT+”3″;
txt.setText(NumberT);
}
});

Button btn8=(Button) findViewById(R.id.btn8);
btn8.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {

NumberT=NumberT+”4″;
txt.setText(NumberT);
}
});

Button btn9=(Button) findViewById(R.id.btn9);
btn9.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {

NumberT=NumberT+”5″;
txt.setText(NumberT);
}
});
Button btn10=(Button) findViewById(R.id.btn10);
btn10.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {

NumberT=NumberT+”4″;
txt.setText(NumberT);
}
});
Button btn3=(Button) findViewById(R.id.btn3);
btn3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {

result=Integer.parseInt(NumberT);
NumberT=””;
txt.setText(NumberT);
op=”+”;
}
});

Button btn7=(Button) findViewById(R.id.btn7);
btn7.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {

result=Integer.parseInt(NumberT);
NumberT=””;
txt.setText(NumberT);
op=”-“;
}
});
Button btn15=(Button) findViewById(R.id.btn15);
btn15.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {

result=Integer.parseInt(NumberT);
NumberT=””;
txt.setText(NumberT);
op=”*”;
}
});
Button btn11=(Button) findViewById(R.id.btn11);
btn11.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {

result=Integer.parseInt(NumberT);
NumberT=””;
txt.setText(NumberT);
op=”/”;
}
});
Button btn2=(Button) findViewById(R.id.btn2);
btn2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (op==”+”) resultK=result+Integer.parseInt(txt.getText().toString());
if (op==”-“) resultK=result-Integer.parseInt(txt.getText().toString());
if (op==”*”) resultK=result*Integer.parseInt(txt.getText().toString());
if(op==”/”){
if(txt.getText().toString()==”” || txt.getText().toString()==null)
{
txt.setText(“error”);
}
else
resultK=result/Integer.parseInt(txt.getText().toString());
}
// String str = String.valueOf(num);
txt.setText(String.valueOf(resultK));
}
});

}
}
خرروجی اجرای برنامه

تمرین ششم

برنامه محاسبه یک عد به توان عدد دوم

کد XML


    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

کد جاوا

package com.example.exampm110;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
int X=1,Y=1,P=1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

EditText NumberOn= (EditText) findViewById(R.id.NumberOn);
EditText NumberTwo= (EditText) findViewById(R.id.NumberTwo);
TextView Result= (TextView) findViewById(R.id.Result);
Button Btn=(Button)findViewById(R.id.Btn);

Btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
P=1;

X=Integer.parseInt(NumberOn.getText().toString());
Y=Integer.parseInt(NumberTwo.getText().toString());
for (int i=1;i<=Y;i++)
{
P=P*X;
}
Result.setText(String.valueOf(P));

}
});
}
}
خروجی اجرای برنامه

تمرین هفتم

برنامه جعبه ابزار

کد xml صفحه اول


    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

کد xml صفحه دوم


    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".List">
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical">
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/Tabdil_Arz"
        android:layout_margin="50px"
        android:text="تبدبل ارز"
        android:textSize="36sp"/>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/Tabdil_Dam"
        android:layout_margin="50px"
        android:text="تبدبل دما"
        android:textSize="36sp"/>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/Mohasebe_Hajm"
        android:layout_margin="50px"
        android:text="محاسبه حجم"
        android:textSize="36sp"/>

کد xml صفحه سوم


    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".Arz">
    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        tools:ignore="MissingConstraints">

کد جاوا صفحه اول

package com.example.myapplicationm112;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button mytools=(Button) findViewById(R.id.Mytools);

mytools.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent=new Intent(MainActivity.this,List.class);
startActivity(intent);

}
});
}
}
کد جاوا صفحه دوم

package com.example.myapplicationm112;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class List extends AppCompatActivity {

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

Button tabdil_Arz=(Button) findViewById(R.id.Tabdil_Arz);

tabdil_Arz.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent=new Intent(List.this,Arz.class);
startActivity(intent);

}
});

}
}
کد جاوا صفحه سوم

package com.example.myapplicationm112;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class Arz extends AppCompatActivity {

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

EditText riyal=(EditText)findViewById(R.id.Riyal);

TextView dolar=(TextView) findViewById(R.id.Dolar);
TextView uro=(TextView) findViewById(R.id.Uro);

Button TBA=(Button) findViewById(R.id.Tabdil_Arz);

TBA.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String r=riyal.getText().toString();
int d=(Integer.parseInt(r)*42200);
int u=Integer.parseInt(r)*46600;

dolar.setText();

}
});
}
}
خروجی اجرای برنامه

تمرین هشتم

کار با ریسایلر ویو

کد xml صفحه اول



    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

<android.support.v7.widget.RecyclerView
android:layout_width=”match_parent”
android:id=”@+id/RecyclerView_Id”
android:layout_height=”match_parent”>

کد xml لایوت

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="20dp">

<TextView
    android:id="@+id/sampleText_Id"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_centerInParent="true"
    android:text="sample"
    android:textSize="18dp"
    android:textStyle="bold" />

<ImageView
    android:id="@+id/sampleImage_Id"
    android:layout_width="80dp"
    android:layout_height="80dp"
    android:layout_alignParentRight="true"
    android:src="@mipmap/ic_launcher" />
<View
    android:layout_marginTop="20dp"
    android:layout_height="1dp"
    android:background="#000"
    android:layout_below="@id/sampleImage_Id"
    android:layout_width="match_parent"></View>
</RelativeLayout>
کد جاوا صفحه اول

package com.example.myapplicationm226;

import android.os.Bundle;

import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

public class MainActivity extends AppCompatActivity {

    RecyclerView recyclerView;

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

        //////////////////////////////////////////////////
        Model[] list = new Model[]{new Model("Java", R.drawable.java), new Model("kotlin", R.drawable.kotlin), new Model("PhP", R.drawable.php),
                new Model("Python", R.drawable.python), new Model("Java", R.drawable.java)};

        recyclerView = findViewById(R.id.RecyclerView_Id);
        MyAdapter myAdapter = new MyAdapter(list);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        recyclerView.setAdapter(myAdapter);
        ////////////////////////////////////////////////


    }
}
کد جاوا مدل

package com.example.myapplicationm226;

public class Model {
    private String name;
    private Integer ImaageId;


    public Model(String name, Integer imaageId) {
        this.name = name;
        this.ImaageId = imaageId;
    }
    public String getName() {
        return name;
    }
    public Integer getImaageId() {
        return ImaageId;
    }

    public void setName(String name) {

        this.name = name;
    }

    public void setImaageId(Integer imaageId) {
        ImaageId = imaageId;
    }

}
کد جاوا ادپتور

package com.example.myapplicationm226;

import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;

public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder>{
   ///////////////////////////////////////
    private Model[] listdata;
    RecyclerView recyclerView;

    public MyAdapter(Model[] listdata) {
        this.listdata = listdata;
    }
    //////////////////////////////////////////
    @NonNull
    @Override
    public MyAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup  viewGroup, int i) {

        LayoutInflater layoutInflater = LayoutInflater.from(viewGroup.getContext());
        View MyList = layoutInflater.inflate(R.layout.layout, viewGroup, false);
        ViewHolder viewHolder = new ViewHolder(MyList);

        return viewHolder;


    }

    @Override
    public void onBindViewHolder(@NonNull MyAdapter.ViewHolder viewHolder, int i) {
        final Model list = listdata[i];
        viewHolder.myText.setText(listdata[i].getName());
        viewHolder.myImage.setImageResource(listdata[i].getImaageId());
    }

    @Override
    public int getItemCount() {
        return listdata.length;
    }

    public class ViewHolder extends RecyclerView.ViewHolder {
        TextView myText;
        ImageView myImage;
        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            myText = itemView.findViewById(R.id.sampleText_Id);
            myImage = itemView.findViewById(R.id.sampleImage_Id);
        }
    }
}
خروجی اجرای برنامه